HPM-41CH120AERIs R32-3 - Air-conditioner Vivax - Free user manual and instructions

Product Type	Monobloc Air-to-Water Heat Pump (Air Conditioner)
Model	HPM-41CH120AERIs R32-3
Brand	Vivax
Refrigerant	R32, GWP=675
Factory Charge (4-10kW)	1.40 kg (0.95 tonnes CO2 eq)
Factory Charge (12-16kW)	1.75 kg (1.18 tonnes CO2 eq)
Power Supply (1-phase)	220-240V~50Hz
Power Supply (3-phase)	380-415V 3N~50Hz
Dimensions (4-6kW)	718×1295×429 mm (H×W×D)
Dimensions (8-16kW)	865×1385×526 mm (H×W×D)
Net Weight (without backup heater, 4-6kW)	86 kg
Net Weight (without backup heater, 12-16kW 1-phase)	129 kg
Net Weight (without backup heater, 12-16kW 3-phase)	144 kg
Water Connections	G1" BSP (4-6kW), G5/4" BSP (8-16kW)
Expansion Vessel Volume	8 L
Maximum Working Pressure (Water)	3 bar (pressure relief valve opens at 3 bar)
Operation Range (Heating, Water Outlet)	+12 to +65°C
Operation Range (Cooling, Water Outlet)	+5 to +25°C
Operation Range (Ambient, Heating)	-25 to 35°C
Operation Range (Ambient, Cooling)	-5 to 43°C
Water Flow (4kW)	0.40-0.90 m³/h
Water Flow (16kW)	0.70-3.00 m³/h
Freeze Protection	Heat pump or backup heater (if present) and anti-freeze E-heating tape
Safety Devices	Flow switch, pressure relief valve, high/low pressure switches, ground fault circuit interrupter required

Frequently Asked Questions - HPM-41CH120AERIs R32-3 Vivax

What type of refrigerant does the Vivax HPM-41CH120AERIs R32-3 use?

The unit uses R32 refrigerant with a Global Warming Potential (GWP) of 675.

What are the power supply requirements for this air conditioner?

For 1-phase models: 220-240V~50Hz. For 3-phase models: 380-415V 3N~50Hz. A dedicated circuit and ground fault circuit interrupter (30 mA) are required.

Can the unit be used for both heating and cooling?

Yes, it is a heat pump providing both heating and cooling. It can also produce domestic hot water when connected to a tank.

What is the operating ambient temperature range for heating?

The heat pump can operate in heating mode down to -25°C outside temperature. Below that, the backup heater (if installed) can provide additional heat.

How do I connect a domestic hot water tank?

Connect the tank using a 3-way valve (field supplied). The thermistor (T5) and booster heater (TBH) wiring must be connected to the main board. Refer to section 8.1 and 9.7.6 of the manual.

How often should the refrigerant leakage be checked?

For units with fluorinated greenhouse gases equivalent to 5-50 tonnes CO2: every 12 months (or 24 months with a leak detection system). Above 50 tonnes: more frequently. See section 5.

What is the recommended minimum water volume in the system?

The total water volume (excluding internal unit volume) should be at least 40 liters. For cascade systems, additional buffer volume may be needed.

Can the unit be installed outdoors?

Yes, it is designed for outdoor installation. Ensure good ventilation, avoid direct wind on the air outlet, and protect from heavy snow. A foundation of at least 100 mm is recommended.

What should I do if the unit displays an error code?

Refer to section 13.4 'Error codes' in the manual. Common codes indicate issues like flow switch failure, sensor faults, or communication errors. Switch off power and contact a qualified technician.

How do I winterize the unit if not used?

Drain the water system completely to prevent freezing. If power is available, the freeze protection function can keep the unit safe. Use anti-freeze flow switch if needed. See section 9.4.4.

USER MANUAL HPM-41CH120AERIs R32-3 Vivax

• 3.1 Accessories supplied with the unit 06

• 3.2 Accessories available from supplier 06

4 BEFORE INSTALLATION 06
5 IMPORTANT INFORMATION FOR THE REFRIGERANT 07
6 INSTALLATION SITE 08

- 6.1 Selecting a location in cold climates 09

6.2 Selecting a location in hot climates 09

7 INSTALLATION PRECAUTIONS 10

7.1 Dimensions 10
- 7.2 Installation requirements ...... 10
• 7.3 Drain hole position 11
- 7.4 Servicing space requirements ...... 11

8 TYPICAL APPLICATIONS 13

8.1 Application 1 13
• 8.2 Application 2 15
- 8.3 Cascade system 18
- 8.4 Balance tank volume requirement 20

9 OVERVIEW OF THE UNIT 20

• 9.1 Disassembling the unit ...... 20
• 9.2 Main components ...... 21
  • 9.3 Electronic control box 22
  • 9.4 Water piping 31
• 9.5 Filling water 34
• 9.6 Water piping insulation 35
  9.7 Field wiring 35

10 START-UP AND CONFIGURATION 49

• 10.1 DIP switch settings overview 49

• 10.2 Initial start-up at low outdoor ambient temperature 49
• 10.3 Pre-operation checks 50
• 10.4 The circulation pump 50
• 10.5 Field settings 52

11 TEST RUN AND FINAL CHECKS 63

• 11.1 Final checks 63
• 11.2 Test run operation (manually) 63

12 MAINTENANCE AND SERVICE 63

13 TROUBLE SHOOTING 64

• 13.1 General guidelines 64
• 13.2 General symptoms....64
• 13.3 Operation parameter 66
- 13.4 Error codes.... 68

14 TECHNICAL SPECIFICATIONS 76

• 14.1 General 76
• 14.2 Electrical specifications ...... 76

15 INFORMATION SERVICING 77

Technical line drawing of a fan or vent assembly with radial blades and central hub (no text or symbols)

Technical line drawing of a mechanical fan or air conditioning unit with radial blades and central hub (no text or symbols)

8/10/12/14/16 kW4/6 kW

Internal layout:12\~16kW(3-phase) for example

4/6 kW

Technical line drawing of a mechanical device with three circular insets showing internal components (no text or symbols)

8/10/12/14/16 kW

Please remove the hollow plate after installation.

Technical line drawing of a modular air conditioning unit with cooling fins and mounting base (no text or symbols)

NOTE

The picture and function described in this manual contain the backup heater components. Pictures in this manual are for reference only, please refer to the actual product.

Unit	1-phase 3-phase
	4	6	8	10	12	14	16			1612 14
Capacity of backup heater	3kW(1-phase)		3kW(1-phase) or 9kW(3-phase)
	Backup heater (optional)
The standard unit without backup heater. Backup heater can be integrated in the unit for customized models(4~16kW).

1 SAFETY PRECAUTIONS

The precautions listed here are divided into the following types. They are quite important, so be sure to follow them carefully. Meanings of DANGER, WARNING, CAUTION and NOTE symbols.

i INFORMATION

• Read these instructions carefully before installation. Keep this manual in a handy for future reference.
• Improper installation of equipment or accessories may result in electric shock, short-circuit, leakage, fire or other damage to the equipment. Be sure to only use accessories made by the supplier, which are specifically designed for the equipment and make sure to get installation done by a professional.
• All the activities described in this manual must be carried out by a licensed technician. Be sure to wear adequate personal protection equipment such as gloves and safety glasses while installing the unit or carrying out maintenance activities.
• Contact your dealer for any further assistance.

Warning symbol of a flame inside a triangle (no text or numbers)

Caution: Risk of fire/ flammable materials

WARNING

Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

DANGER

Indicates an imminently hazardous situation which if not avoided, will result in death or serious injury.

WARNING

Indicates a potentially hazardous situation which if not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which if not avoided, may result in minor or moderate injury. It is also used to alert against unsafe practices.

NOTE

Indicates situations that could only result in accidental equipment or property damage.

Explanation of symbols displayed on the monobloc

	WARNING	This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.
	CAUTION	This symbol shows that the operation manual should be read carefully.
	CAUTION	This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.
	CAUTION	This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.
	CAUTION	This symbol shows that information is available such as the operating manual or installation manual.

DANGER

• Before touching electric terminal parts, turn off power switch.
- When service panels are removed, live parts can be easily touched by accident.
- Never leave the unit unattended during installation or servicing when the service panel is removed.
- Do not touch water pipes during and immediately after operation as the pipes may be hot and could burn your hands. To avoid injury, give the piping time to return to normal temperature or be sure to wear protective gloves.
- Do not touch any switch with wet fingers. Touching a switch with wet fingers can cause electrical shock.
• Before touching electrical parts, turn off all applicable power to the unit.

WARNING

• Tear apart and throw away plastic packaging bags so that children will not play with them. Children playing with plastic bags face danger of death by suffocation.
• Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
• Ask your dealer or qualified personnel to perform installation work in accordance with this manual. Do not install the unit yourself. Improper installation could result in water leakage, electric shocks or fire.
• Be sure to use only specified accessories and parts for installation work. Failure to use specified parts may result in water leakage, electric shocks, fire, or the unit falling from its mount.
• Install the unit on a foundation that can withstand its weight. Insufficient physical strength may cause the equipment to fall and possible injury.
• Perform specified installation work with full consideration of strong wind, hurricanes, or earthquakes. Improper installation work may result in accidents due to equipment falling.
• Make certain that all electrical work is carried out by qualified personnel according to the local laws and regulations and this manual using a separate circuit. Insufficient capacity of the power supply circuit or improper electrical construction may lead to electric shocks or fire.
• Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground fault circuit interrupter may cause electric shocks and fire.
• Make sure all wiring is secure. Use the specified wires and ensure that terminal connections or wires are protected from water and other adverse external forces. Incomplete connection or affixing may cause a fire.
• When wiring the power supply, form the wires so that the front panel can be securely fastened. If the front panel is not in place there could be overheating of the terminals, electric shocks or fire.
  • After completing the installation work, check to make sure that there is no refrigerant leakage.
• Never directly touch any leaking refrigerant as it could cause severe frostbite. Do not touch the refrigerant pipes during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor and other refrigerant cycle parts. Burns or frostbite are possible if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to wear protective gloves.
• Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation. Touching the internal parts can cause burns. To avoid injury, give the internal parts time to return to normal temperature or, if you must touch them, be sure to wear protective gloves.

CAUTION

• Ground the unit.
• Grounding resistance should be according to local laws and regulations.
- Do not connect the ground wire to gas or water pipes, lightning conductors or telephone ground wires.
• Incomplete grounding may cause electric shocks.

- Gas pipes: Fire or an explosion might occur if the gas leaks.

- Water pipes: Hard vinyl tubes are not effective grounds.

- Lightning conductors or telephone ground wires: Electrical threshold may rise abnormally if struck by a lightning bolt.

- Install the power wire at least 3 feet (1 meter) away from televisions or radios to prevent interference or noise. (Depending on the radio waves, a distance of 3 feet (1 meter) may not be sufficient to eliminate the noise.)

- Do not wash the unit. This may cause electric shocks or fire. The appliance must be installed in accordance with national wiring regulations. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

- Do not install the unit in the following places:

- Where there is mist of mineral oil, oil spray or vapors. Plastic parts may deteriorate, and cause them to come loose or water to leak.

- Where corrosive gases (such as sulphurous acid gas) are produced. Where corrosion of copper pipes or soldered parts may cause refrigerant to leak.

- Where there is machinery which emits electromagnetic waves. Electromagnetic waves can disturb the control system and cause equipment malfunction.

- Where flammable gases may leak, where carbon fiber or ignitable dust is suspended in the air or where volatile flammables such as paint thinner or gasoline are handled. These types of gases might cause a fire.

- Where the air contains high levels of salt such as near the ocean.

- Where voltage fluctuates a lot, such as in factories.

- In vehicles or vessels.

- Where acidic or alkaline vapors are present.

- This appliance can be used by children 8 years old and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they are supervised or given instruction on using the unit in a safe manner and understand the hazards involved. Children should not play with the unit. Cleaning and user maintenance should not be done by children without supervision.

• Children should be supervised to ensure that they do not play with the appliance.

- If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified person.

- DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substance can leak into the groundwater and get into the food chain, damaging your health and well-being.

- The wiring must be performed by professional technicians in accordance with national wiring regulation and this circuit diagram. An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device(RCD) with the rating not exceeding 30mA shall be incorporated in the fixed wiring according to the national rule.

- Confirm the safety of the installation area (walls, floors, etc.) without hidden dangers such as water, electricity, and gas, before wiring/pipes.

- Before installation, check whether the user's power supply meets the electrical installation requirements of unit (including reliable grounding, leakage, and wire diameter electrical load, etc.). If the electrical installation requirements of the product are not met, the installation of the product is prohibited until the product is rectified.

- When installing multiple air conditioners in a centralized manner, please confirm the load balance of the three-phase power supply, and multiple units are prevented from being assembled into the same phase of the three-phase power supply.

• Product installation should be fixed firmly. Take reinforcement measures, when necessary.

NOTE

• About Fluorinated Gasses

- This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas and the amount, please refer to the relevant label on the unit itself. Compliance with national gas regulations shall be observed.

- Installation, service, maintenance and repair of this unit must be performed by a certified technician.

- Product uninstallation and recycling must be performed by a certified technician.

- If the system has a leak-detection system installed, it must be checked for leaks at least every 12 months. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

2 GENERAL INTRODUCTION

• These units are used for both heating and cooling applications and domestic hot water tanks. They can be combined with fan coil units, floor heating applications, low temperature high efficiency radiators, domestic hot water tanks and solar kits, which are all field supplied.
  • A wired controller is supplied with the unit.
• If you choose the built-in backup heater unit, the backup heater can increase the heating capacity during cold outdoor temperature. The backup heater also serves as a backup in case of malfunctioning and for frozen protection of the outside water piping during winter time.

NOTE

• Maximum length of communication wirings between the indoor unit and the controller is 50m.
• Power cords and communication wiring must be laid out separately, they can not be placed in the same conduit. Otherwise, it may lead to electromagnetic interference. Power cords and communication wirings should not come in contact with the refrigerant pipe so as to prevent the high temperature pipe from damaging wirings.
• Communication wirings must use shielded lines. Including indoor unit to outdoor unit PQE line, indoor unit to controller ABXYE line.

① Heat pump capacity.
② Required heating capacity (site dependent).
③ Additional heating capacity provided by backup heater.

Domestic hot water tank (field supply)

A domestic hot water tank(with or without booster heater) can be connected to the unit.

The requirement of the tank is different for different unit and material of heat exchanger.

The booster heater should be installed below the temperature probe (T5).

The heat exchanger (coil) should be installed below the temperature probe.

The pipe length between the outdoor unit and tank should be less than 5 meters.

Model		4~6kW	8~10kW	12~16kW
Volume of tank/L	Recommended	100~250	150~300	200~500
Heat exchange area/ m^2 (Stainless steel coil)	Minimum	1.4	1.4	1.6
Heat exchange area/ m^2 (Enamel coil)	Minimum	2.0	2.0	2.5

Room thermostat(field supplied)

Room thermostat can be connected to the unit(room thermostat should be kept away from heating source when selecting the installation place).

Solar kit for domestic hot water tank(field supplied)

An optional solar kit can be connected to the unit.

Operation range

Outlet water (Heating mode)		+12 ~ +65°C
Outlet water (Cooling mode)		+5 ~ +25°C
Domestic hot water		+12 ~ +60°C
Ambient temperature		-25 ~ +43°C
Water pressure		0.1~0.3MPa
Water flow	4kW	0.40~0.90m3/h
	6kW	0.40~1.25m3/h
	8kW	0.40~1.65m3/h
	10kW	0.40~2.10m3/h
	12kW	0.70~2.50m3/h
	14kW	0.70~2.75m3/h
	16kW	0.70~3.00m3/h

The unit have a freeze prevention function that uses the heat pump or backup heater (Customized model) to keep the water system safe from freezing in all conditions. Since a power failure may happen when the unit is unattended, It's suggested to use anti-freezing flow switch in the water system. (Refer to 9.4 "Water piping").

In cooling mode, the water flowing temperature (TW_out) range in different outdoor temperature(T4) is listed below:

Operation range by heat pump with possible limitation and protection.

In heating mode, the water flowing temperature (TW_out) range in different outdoor temperature (T4) is listed below:

IF ITH/AHS setting is valid, only ITH/AHS turns on. If ITH/AHS setting is invalid, only heat pump turns on, limitation and protection may occur during heat pump operation. Operation range by heat pump with possible limitation and protection.
- Heat pump turns off, only IRR/SHS turns on. - Maximum inlet water temperature line for heat pump operation,

In DHW mode, the water flowing temperature(TW_out) range in different outdoor temperature(T4) is listed below:

If IEH/ABS setting is invalid, only IEH/ABS turns on; If IEH/ABS setting is invalid, only heat pump turns on. Limitation and protection may occur during heat pump operation. Operation range by heat pump with possible limitation and protection. Heat pump turns off, only IEH/ABS turns on. Maximum inlet water temperature line for heat pump operation.

4 BEFORE INSTALLATION

- Before installation

Be sure to confirm the model name and the serial number of the unit.

- Handling

Due to relatively large dimensions and heavy weight, the unit should only be handled using lifting tools with slings. The slings can be fitted into foreseen sleeves at the base frame that are made specifically for this purpose.

3 ACCESSORIES

3.1 Accessories supplied with the unit

Installation Fittings
Name	Shape	Quantity
Installation and owner's manual(this book)		1
Operation manual		1
Technical data manual	[OTCG]	1
Y-shape filter	[OD3Y]	1
Wired controller		1
Thermistor for domestic hot water tank or zone2 water flow or balance tank		1
Drian hose		1
Energy label 1	[5ZWC]
Tighten belt for customer wiring use		2
		3
Network matching wires		1

3.2 Accessories available from supplier

Thermistor for balance tank(Tbt1)		1
Extension wire for Tbt1		1
Thermistor for Zone 2 flow temp.(Tw2)		1
Extension wire for Tw2		1
Thermistor for solar temp.(Tsolar)		1
Extension wire for Tsolar		1

Thermistor and extension wire for Tbt1, Tw2, Tsolar can be shared, if these functions are needed at the same time, and 10m in length of the sensor cable please order these thermistors and extension wire additionally.

CAUTION

• To avoid injury, do not touch the air inlet or aluminum fins of the unit.
- Do not use the grips in the fan grills to avoid damage.
- The unit is top heavy! Prevent the unit from falling due to improper inclination during handling.

Model AA		B	C
1 phase 4/6kW	295 540	190
1 phase 8/10kW	330 580	280
1 phase 12/14/16kW	290 605	245
3 phase 12/14/16kW	200 605	245

The position of barycenter for different units can be seen in the picture below.

Technical line drawing of a fan or vent with labeled dimensions A and B (no text or symbols beyond labels)

4/6 kW (unit:mm)

Technical diagram of a fan or vent with internal grid pattern, shown with dimension lines A and B (no text or symbols)

8/10/12/14/16 kW (unit:mm)

5 IMPORTANT INFORMATION FOR THE REFRIGERANT

This product has the fluorinated gas, which is forbidden to release to air.

Refrigerant type: R32; Volume of GWP: 675.

GWP=Global Warming Potential

Model	Factory charged refrigerant volume in the unit
	Refrigerant/kg	Tonnes CO2 equivalent
4kW	1.40 0.95
6kW	1.40 0.95
8kW	1.40 0.95
10kW	1.40	0.95
12kW	1.75	1.18
14kW	1.75	1.18
16kW	1.75	1.18

CAUTION

• Frequency of Refrigerant Leakage Checks

• For unit that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2 equivalent or more, but of less than 50 tonnes of CO2 equivalent, at least every 12 months, or where a leakage detection system is installed, at least every 24 months.
• For unit that contains fluorinated greenhouse gases in quantities of 50 tonnes of CO2 equivalent or more, but of less than 500 tonnes of CO2 equivalent at least every six months, or where a leakage detection system is installed, at least every 12 months.
• For unit that contains fluorinated greenhouse gases in quantities of 500 tonnes of CO_2 equivalent or more, at least every three months, or where a leakage detection system is installed, at least every six months.
• This air-conditioning unit is a hermetically sealed equipment that contains fluorinated greenhouse gases.
• Only certificated person is allowed to do installation, operation and maintenance.

6 INSTALLATION SITE

WARNING

• There is flammable refrigerant in the unit and it should be installed in a well-ventilated site. If the unit is installed inside, an additional refrigerant detection device and ventilation equipment must be added in accordance with the standard EN378. Be sure to adopt adequate measures to prevent the unit from being used as a shelter by small animals.
• Small animals making contact with electrical parts can cause malfunction, smoke or fire. Please instruct the customer to keep the area around the unit clean.

- Select an installation site where the following conditions are satisfied and one that meets with your customer's approval.

• Places that are well-ventilated.
• Places where the unit does not disturb neighbors.
• Safe places which can bear the unit's weight and vibration and where the unit can be installed at an even level.
• Places where there is no possibility of flammable gas or product leak.
• The equipment is not intended for use in a potentially explosive atmosphere.
• Places where servicing space can be well ensured.
• Places where the units' piping and wiring lengths come within the allowable ranges.
• Places where water leaking from the unit cannot cause damage to the location (e.g. in case of a blocked drain pipe).
• Places where rain can be avoided as much as possible.
• Do not install the unit in places often used as a work space. In case of construction work (e.g. grinding etc.) where a lot of dust is created, the unit must be covered.
• Do not place any object or equipment on top of the unit (top plate).
• Do not climb, sit or stand on top of the unit.
• Be sure that sufficient precautions are taken in case of refrigerant leakage according to relevant local laws and regulations.
• Don't install the unit near the sea or where there is corrosion gas.

- When installing the unit in a place exposed to strong wind, pay special attention to the following.

Strong winds of 5m / sec or more blowing against the unit's air outlet causes a short circuit (suction of discharge air), and this may have the following consequences:

• Deterioration of the operational capacity.
• Frequent frost acceleration in heating operation.
• Disruption of operation due to rise of high pressure.
• When a strong wind blows continuously on the front of the unit, the fan can start rotating very fast until it breaks.
  In normal condition, refer to the figures below for installation of the unit:

Line drawing of a wall-mounted air conditioner unit with fan and vent, mounted on brick wall (no text or symbols)

Unit	A(mm)
4~6kW	≥300
8~16kW	≥300

In case of strong wind and the wind direction can be foreseen, refer to the figures below for installation of the unit(any one is OK):

Turn the air outlet side toward the building's wall, fence or screen.

Technical line drawing of a wall-mounted air duct system with a curved arrow indicating airflow direction (no text or symbols)

Unit	B(mm)
4~6kW	≥1000
8~16kW	≥1500

Make sure there is enough room to do the installation.

Set the outlet side at a right angle to the direction of the wind.

Line drawing of a modular air conditioner unit with fan blades and cooling unit (no text or symbols)

• Prepare a water drainage channel around the foundation, to drain waste water from around the unit.
- If water does not easily drain from the unit, mount the unit on a foundation of concrete blocks, etc. (the height of the foundation should be about 100 mm (3.93 in).
- If you install the unit on a frame, please install a waterproof plate (about 100 mm) on the underside of the unit to prevent water from coming in from the low side.
- When installing the unit in a place frequently exposed to snow, pay special attention to elevate the foundation as high as possible.

- If you install the unit on a building frame, please install a waterproof tray (field supply) (about 100mm, on the underside of the unit) in order to avoid drain water dripping. (See the picture in the right).

6.1 Selecting a location in cold climates

Refer to "Handling" in section "4 Before installation"

NOTE

When operating the unit in cold climates, be sure to follow the instructions described below.

• To prevent exposure to wind, install the unit with its suction side facing the wall.
• Never install the unit at a site where the suction side may be exposed directly to wind.
• To prevent exposure to wind, install a baffle plate on the air discharge side of the unit.
• In heavy snowfall areas, it is very important to select an installation site where the snow will not affect the unit. If lateral snowfall is possible, make sure that the heat exchanger coil is not affected by the snow (if necessary construct a lateral canopy).

① Construct a large canopy.
② Construct a pedestal. Install the unit high enough off the ground to prevent it from being buried in snow.

6.2 Selecting a location in hot climates

As the outdoor temperature is measured via the outdoor unit air thermistor, make sure to install the outdoor unit in the shade or a canopy should be constructed to avoid direct sunlight, so that it is not influenced by the sun's heat, otherwise protection may be possible to the unit.

7 INSTALLATION PRECAUTIONS

7.1 Dimensions

4/6 kW
(unit: mm)

8/10/12/14/16 kW
(unit: mm)

Model A B C D E G H I J K						F
4/6kW	1295	401	429	115	638	379	105	225	718	161	/
8/10/12/14/16kW	1385	488	526	192	656	363	60	221	865	182	81

7.2 Installation requirements

• Check the strength and level of the installation ground so that the unit may not cause any vibrations or noise during its operation.
• In accordance with the foundation drawing in the figure, fix the unit securely by means of foundation bolts. (Prepare four sets each of 10 Expansion bolts, nuts and washers which are readily available in the market.)
• Screw in the foundation bolts until their length is 20 mm from the foundation surface.

(unit: mm)

Technical drawing of a mechanical fan or vent assembly with internal blades and mounting base (no text or symbols)

7.3 Drain hole position

NOTE

It's necessary to install an electrical heating belt if water can't drain out in cold weather even the big drain hole has opened.

7.4 Servicing space requirements

7.4.1 In case of stacked installation

1) In case obstacles exist in front of the outlet side. 2) In case obstacles exist in front of the air inlet.

Unit	A(mm)
4~6kW	≥1000
8~16kW	≥1500

7.4.2 In case of multiple-row installation (for roof top use, etc.)

In case of installing multiple units in lateral connection per row.

Unit	A(mm) B1(mm) B2(mm) C(mm)
4~6kW	≥2500	≥1000	≥300	≥600
8~16kW	≥3000	≥1500

8 TYPICAL APPLICATIONS

The application examples given below are for illustration only.

8.1 Application 1

graph TD
    A["Outdoor Air Inlet"] --> B["6.2"]
    B --> C["6.1"]
    C --> D["AHS"]
    D --> E["Modbus 14"]
    E --> F["12"]
    F --> G["1416"]
    G --> H["15"]
    H --> I["16"]
    I --> J["13"]
    J --> K["9"]
    K --> L["3"]
    L --> M["4"]
    M --> N["4.1"]
    N --> O["4.2"]
    O --> P["5"]
    P --> Q["4.3"]
    Q --> R["10"]
    R --> S["FHL1 FHL2 FHLn"]
    S --> T["19"]
    T --> U["20"]
    U --> V["Indoor Air Inlet"]
    W["Indoor Air Inlet"] --> X["6"]
    X --> Y["11"]
    Y --> Z["8"]
    Z --> AA["11.2"]
    AA --> AB["11.3"]
    AB --> AC["13"]
    AC --> AD["17"]
    AD --> AE["18"]

Code Assembly unit Code Assembly unit
1 Main unit		11 Domestic hot water tank (Field supply)
2	User interface	11.1	TBH: Domestic hot water tank booster heater (Field supply)
3 SV1:3-way valve (Field supply)		11.2	Coil 1, heat exchanger for heat pump
4	Balance tank (Field supply)	11.3 Coil	2, heat exchanger for Solar energy
4.1 Automatic air purge valve2 Filter (Accessory)
4.2 Drainage valve 13 Check valve (Field supply)
4.3	Tbt1: Balance tank upper temperature sensor (Optional)	14 Shut-off valve (Field supply)
5	P_o:Outside circulation pump (Field supply)	15 Filling	valve (Field supply)
6 P_s: Solar pump (Field supply)		16 Drainage valve (Field supply)
6.1	Tsolar: Solar temperature sensor (Optional)	17 Tap water inlet pipe (Field supply))
6.2	Solar panel (Field supply)	18 Hot water tap (Field supply)
7	P_d: DHW pipe pump (Field supply)	19 Collector/distributor (Field supply)
8	T5: Domestic water tank temperature sensor (Accessory)	20 Bypass s valve (Field supply)
		FHL 1...n	Floor heating loop (Field supply)
9	T1:Total water flow temperature sensor (Optional)	AHS	Auxiliary heat source (Field supply)
10	Expansion vessel (Field supply)

- Space heating

The ON/OFF signal and operation mode and temperature setting are set on the user interface. P_o keeps running as long as the unit is ON for space heating, SV1 keeps OFF.

• Domestic water heating

The ON/OFF signal and target tank water temperature (T5S) are set on the user interface. P_o stops running as long as the unit is ON for domestic water heating, SV1 keeps ON.

• AHS (auxiliary heat source) control

The AHS function is set on the hydraulic main board (See 10.1 "DIP switch settings overview")

1) When the AHS is set to be valid only for heating mode, AHS can be turned on in the following ways:
a. Turn on the AHS via BACKHEATER function on the user interface;
b. AHS will be turned on automatically if initial water temperature is too low or target water temperature is too high at low ambient temperature.
P_o keeps running as long as the AHS is ON, SV1 keeps OFF.
2) When the AHS is set to be valid for heating mode and DHW mode. In heating mode, AHS control is same as part 1); In DHW mode, AHS will be turned on automatically when the initial domestic water temperature T5 is too low or the target domestic water temperature is too high at low ambient temperature. P_o stops running, SV1 keeps ON.
3) When the AHS is set to be valid, M1M2 can be set to be valid on the user interface. In heating mode, AHS will be turned on if MIM2 dry contact closes. This function is invalid in DHW mode.

• TBH (tank booster heater) control

The TBH function is set on the user interface. (See 10.1 "DIP switch settings overview")

1) When the TBH is set to be valid, TBH can be turned on via TANKHEATER function on the user interface; In DHW mode, TBH will be turned on automatically when the initial domestic water temperature T5 is too low or the target domestic water temperature is too high at low ambient temperature.
2) When the TBH is set to be valid, M1M2 can be set to be valid on the user interface. TBH will be turned on if MIM2 dry contact closes.

- Solar energy control

Hydraulic module recognizes solar energy signal by judging Tsolar or receiving SL1SL2 signal from user interface(See 10.5.15 INPUT DEFINE). The recognition method can be set via SOLAR INPUT on the user interface. Please refer to 9.7.6/1). For solar energy input signal" for wiring.

1) When Tsolar is set to be valid, Solar energy turns ON when Tsolar is high enough, P_s starts running; Solar energy turns OFF when Tsolar is low, P_s stops running.
2) When SL1SL2 control is set to be valid, Solar energy turns ON after receiving Solar kit signal from user interface, P_s starts running; Without solar kit signal. Solar energy turns OFF, P_s stops running.

CAUTION

The highest outlet water temperature may reach 70^ C, please beware of burn.

NOTE

Make sure to fit the (SV1) 3-way valve correctly. For more details, please refer to 9.7.6 "Connection for other components.

At extremely low ambient temperature, the domestic hot water is exclusively heated by TBH, which assures that heat pump can be used for space heating with full capacity.

Details on domestic hot water tank configuration for low outdoor temperatures (T4DHWMIN) can be found in 10.5.1 "DHW MODE SETTING".

8.2 Application 2

ROOM THERMOSTAT Control for Space heating or cooling need to be set on the user interface. It can be set in three ways: MODE SET/ONE ZONE/DOUBLE ZONE. The monobloc can be connected to a high voltage room thermostat and a low voltage room thermostat. A thermostat transfer board can also be connected. Another six thermostats can be connected to the thermostat transfer board. Please refer to 9.7.6/5) "For room thermostat" for wiring. (see 10.5.6 "ROOM THERMOSTAT" for setting)

8.2.1 One zone control

graph TD
    A["Outdoor Air Condition Unit 1"] --> B["Modbus"]
    B --> C["2"]
    C --> D["Indoor Air Conditioning Unit 21"]
    D --> E["RT1, RT8, RT10, RT2, RT3, RT4, RT5"]
    D --> F["Indoor Air Conditioning Unit 4.1, 4.2, 5"]
    F --> G["FHL1, FHL2, ... FHLn"]

Code Assembly unit Code Assembly unit
1 Main unit 14 Shut-off valve (Field supply)
15 Filldgerahter(Field supply) 2
4	Balance tank(Field Supplage valve (Field supply))
4.1	Automatic air purge valve	19 Collector/distributor (Field supply)
4.2	Drainage valve 21 Thermostat transfer board (Optional)
5	P_o: Outside circulation pump (Field supply)	RT 1...7	Low voltageroom thermostat (Field supply)
10	Expansion vessel (Field supply)	RT8	High voltage room thermostat (Field supply)
		FHL 1...n	Floor heating loop (Field supply) 12 F

filter (Accessory)

- Space heating

One zone control: the unit ON/OFF is controlled by the room thermostat, cooling or heating mode and outlet water temperature are set on the user interface. System is ON when any "HL" of all the thermostats closes. When all "HL" open, system turns OFF.

• The circulation pumps operation

When the system is ON, which means any "HL" of all the thermostats closes, P_o starts running; When the system is OFF, which means all "HL" close, P_o stops running.

8.2.2 Mode set control

graph TD
    subgraph Indoor
        A["Outdoor Air Inlet 1"] --> B["2"]
        B --> C["RT8"]
        B --> D["RT1"]
        C --> E["21"]
        D --> E
        E --> F["RT2 RT3"]
        E --> G["RT4"]
        E --> H["RT5"]
        E --> I["RT6"]
        E --> J["RT7"]
        E --> K["Indoor"]
        L["Indoor Inlet 2"] --> M["22"]
        N["Indoor Inlet 4.1"] --> O["4.2"]
        P["Indoor Inlet 5"] --> Q["10"]
        R["Indoor Inlet 19"] --> S["FCU1 FCUnFCU2"]
        T["Indoor Inlet 20"] --> U["FHL1 FHL2 FHLn"]
    end
    style Indoor fill:#f9f,stroke:#333
    style Outdoor fill:#ccf,stroke:#333

Code Assembly unit Code Assembly unit
1 Main unit		16	Drainage valve (Field supply)
2	User interface	19	Collector/distributor
4	Balance tank (Field supply)	20	Bypass valve (Field supply)
4.1	Automatic air purge valve	21	Thermostat transfer board (Field supply)
4.2	Drainage valve	22	SV2: 3-way valve (Field supply)
5	P_o: Outside circulation pump (Fieldsupply)	RT 1...7	Low voltage room thermostat
10	Expansion vessel (Field supply )	RT8	High voltage room thermostat
12	Filter (Accessory)	FHL1...n	Floor heating loop (Field supply)
14	Shut-off valve (Field supply )	FCU1...n	Fan coil unit (Field supply)
15	14Shut-off valve

- Space heating

Cooling or heating mode is set via the room thermostat, water temperature is set on the user interface.

1) When any "CL" of all the thermostats close, system will be set at cooling mode.
2) When any "HL" of all the thermostats close and all "CL" open, system will be set at heating mode.

• The circulation pumps operation

1) When the system is in cooling mode, which means any "CL" of all the thermostats closes, SV2 keeps OFF, P_o starts running.
2) When the system is in heating mode, which means one or more "HL" close and all "CL" open, SV2 keeps ON, P_o starts running.

8.2.3 Double zone control

graph TD
    A["Outdoor Air Inverter"] --> B["Indoor"]
    B --> C["Modbus"]
    C --> D["2"]
    D --> E["RT2"]
    D --> F["RT3"]
    D --> G["21"]
    G --> H["RT4"]
    G --> I["RT5"]
    G --> J["RT7"]
    G --> K["RT6"]
    B --> L["RT8"]
    L --> M["RT1"]
    B --> N["10"]
    N --> O["Modbus"]
    O --> P["Modbus 14"]
    O --> Q["Modbus 16"]
    O --> R["Modbus 15"]
    O --> S["Modbus 16"]
    O --> T["Modbus 14"]
    O --> U["Modbus 16"]
    O --> V["Modbus 15"]
    O --> W["Modbus 16"]
    O --> X["Modbus 14"]
    O --> Y["Modbus 16"]
    O --> Z["Modbus 15"]
    O --> AA["Modbus 16"]
    O --> AB["Modbus 14"]
    O --> AC["Modbus 16"]
    O --> AD["Modbus 15"]
    O --> AE["Modbus 16"]
    O --> AF["Modbus 14"]
    O --> AG["Modbus 16"]
    O --> AH["Modbus 15"]
    O --> AI["Modbus 16"]
    O --> AJ["Modbus 14"]
    O --> AK["Modbus 16"]
    O --> AL["Modbus 15"]
    O --> AM["Modbus 16"]
    O --> AN["Modbus 14"]
    O --> AO["Modbus 16"]
    O --> AP["Modbus 15"]
    O --> AQ["Modbus 16"]
    O --> AR["Modbus 14"]
    O --> AS["Modbus 16"]
    O --> AT["Modbus 15"]
    O --> AU["Modbus 16"]
    O --> AV["Modbus 14"]
    O --> AW["Modbus 16"]
    O --> AX["Modbus 15"]
    O --> AY["Modbus 16"]
    O --> AZ["Modbus 14"]
    O --> BA["Modbus 16"]
    O --> BB["Modbus 15"]
    O --> BC["Modbus 16"]
    O --> BD["Modbus 14"]
    O --> BE["Modbus 16"]
    O --> BF["Modbus 15"]
    O --> BG["Modbus 16"]
    O --> BH["Modbus 14"]
    O --> BI["Modbus 16"]
    O --> BJ["Modbus 15"]
    O --> BK["Modbus 16"]
    O --> BL["Modbus 14"]
    O --> BM["Modbus 16"]
    O --> BN["Modbus 15"]
    O --> BO["Modbus 16"]
    O --> BP["Modbus 14"]
    O --> BQ["Modbus 16"]
    O --> BR["Modbus 15"]
    O --> BS["Modbus 16"]

Code Assembly unit Code Assembly unit
1 Main unit		19	Collector/distributor (Field supply)
2	User interface	21	Thermostat transfer board (optional)
4	Balance tank (Field supply)	23	Mixing station (Field supply)
4.1	Automatic air purge valve	23.1	SV3: Mixing valve (Field supply)
4.2	Drainage valve	23.2	P_c: zone 2 circulation pump (Field supply)
5	P_o: zone 1 circulation pump (Field supply)	RT 1...7	Low voltage room thermostat (Field supply)
10	Expansion vessel (Field supply)	RT8	High voltage room thermostat (Field supply)
12	Filter (Accessory)	Tw2	Zone 2 water flow temperature sensor (Optional)
14	Shut-off valve (Field supply)	FHL1...n	Floor heating loop (Field supply)
15	Filling valve (Field supply)	RAD.1...n	Radiator (Field supply)
16	Drainage valve (Field supply)

- Space heating

Zone1 can operate in cooling mode or heating mode, while zone2 can only operate in heating mode; While installation, for all thermostats in zone1, only "H、L" terminals need to be connected. For all thermostats in zone2, only "C、L" terminals need to be connected.

1) The ON/OFF of zone1 is controlled by the room thermostats in zone1. When any "HL" of all thermostats in zone1 closes, zone1 turns ON. When all "HL" turn OFF, zone1 turns OFF; Target temperature and operation mode are set on the user interface.
2) In heating mode, the ON/OFF of zone2 is controlled by the room thermostats in zone2. When any "CL" of all thermostats in zone2 closes, zone2 turns ON. When all "CL" open, zone2 turns OFF. Target temperature is set on the user interface; Zone 2 can only operate in heating mode. When cooling mode is set on the user interface, zone2 keeps in OFF status.

• The circulation pump operation

When zone 1 is ON, P_o starts running; When zone 1 is OFF, P_o stops running; When zone 2 is ON, SV3 switches between ON and OFF according to the set TW2, P_C keeps ON; When zone 2 is OFF, SV3 is OFF, P_c stops running.

The floor heating loops require a lower water temperature in heating mode compared to radiators or fan coil unit. To achieve these two set points, a mixing station is used to adapt the water temperature according to requirements of the floor heating loops. The radiators are directly connected to the unit water circuit and the floor heating loops are after the mixing station. The mixing station is controlled by the unit.

CAUTION

1) Make sure to connect the SV2/SV3 terminals in the wired controller correctly, please refer to 9.7.6/2) for 3-way valve SV1, SV2, SV3.
2) Make sure thermostat wires to the correct terminals and to configure the ROOM THERMOSTAT in the wired controller correctly. Wiring of the room thermostat should follow method A/B/C as described in 9.6.7 "Connection for other components /5) For room thermostat".

NOTE

1) Zone 2 can only operate in heating mode. When cooling mode is set on user interface and zone 1 is OFF, "CL" in zone 2 closes, system still keeps "OFF". While installation, the wiring of thermostats for zone 1 and zone 2 must be correct.
2) Drainage valve must be installed at the lowest position of the piping system.

8.3 Cascade system

graph TD
    A["1 n"] --> B["1.2"]
    B --> C["1.1"]
    C --> D["4.29"]
    D --> E["20"]
    E --> F["19"]
    F --> G["20"]
    G --> H["23"]
    H --> I["19"]
    I --> J["20"]
    J --> K["23"]
    K --> L["19"]
    L --> M["20"]
    M --> N["19"]
    N --> O["20"]
    O --> P["19"]
    P --> Q["20"]
    Q --> R["19"]
    R --> S["20"]
    S --> T["19"]
    T --> U["20"]
    U --> V["19"]
    V --> W["20"]
    W --> X["19"]
    X --> Y["20"]
    Y --> Z["19"]
    Z --> AA["20"]

Code	Assembly unit	Code	Assembly unit	Code	Assembly unit
1.1	Master unit	5	P_O:Outside circulation pump (Field supply)	11.1	TBH: Domestic hot water tank booster heater
1.2...n	Slave unit	6	P_S: Solar pump (Field supply)	11.2	Coin 1,heat exchanger for heat pump
2	User interface	6.1	Tsolar:Solar temperature sensor (Optional)	11.3	Coin 2,heat exchanger for solar energy
3	SV1:3-way valve (Field supply)	6.2	Solar panel (Field supply)	12	Filter (Accessory)
4	Balance tank (Field supply)	7	P_D:DHW pipe pump (Field supply)	13	Check valve (Field supply)
4.1	Automatic air purge valve	8	T5:Domestic water tank temperature sensor (Accessory)	14	Shut-off valve (Field supply)
4.2	Drainage valve	9	Expansion vessel (Field supply)	17	Tap water inlet pipe (Field supply)
4.3	Tbt1:Balance tank upper temperature sensor (optional)	10	T1:Total water flow temperature sensor (Optional)	18	Hot water tap (Field supply)
4.5	Filling valve	11	Domestic hot water tank (Field supply)	19	Collector/distributor (Field supply)
20	Bypass valve (Field supply)	25	Water manometer (Fiel supply)	ZONE1	The space operate cooling or heating mode
23	Mixing station (Fiel supply)	TW2	Zone2 water flow temperature sensor (Optional)	ZONE2	The space only operate heating mode
23.1	SV3:Mixing valve (Fiel supply)	FCU1...n	Fan coil unit(Field supply)	AHS	Auxiliary heat source (Field supply)
23.2	P_C:Zone2 circulation pump (Field supply)	FHL1...n	Floor heating loop (Fiel supply)
24	Automatic air purge valve (Field supply)	K	Contactor (Field supply)

• Domestic water heating

Only master unit (1.1) can operate in DHW mode. T5S is set on the user interface (2). In DHW mode, SV1(3) keeps ON. When master unit operated in DHW mode, slave units can operate in space cooling/heating mode.

- Slave heating

All slave units can operate in space heating mode. The operation mode and setting temperature are set on the user interface (2). Due to changes of the outdoor temperature and the required load indoors, multiple outdoor units may operate at different times.

In cooling mode, SV3(23.1) and P_C (23.2) keep OFF, P_O (5) keeps ON;

In heating mode, when both ZONE 1 and ZONE 2 work, P_C (23.2) and P_O (5) keep ON, SV3 (23.1) switches between ON and OFF according to the set TW2;

In heating mode, when only ZONE 1 works, P_O (5) keep ON, SV3 (23.1) and P_C (23.2) keep OFF. In heating mode, when only ZONE 2 works, P_O (5) keep OFF, P_C (23.2) keeps ON, SV3 (23.1) switches between ON and OFF according to the set TW2;

• AHS(Auxiliary heat source) Control

AHS should be set via the dip switches on main board (refer to 10.1); AHS is only controlled by master unit. When master unit operates in DHW mode, AHS can only be used for producing domestic hot water; when master unit operates in heating mode, AHS can only be used for heating mode.

1) When AHS is set valid only in heating mode, it will be turned on in following conditions:

a.Turn on BACKUPHEATER function on user interface;

b. Master unit operates in heating mode. When inlet water temperature is too low, or while ambient temperature is too low, the target leaving water temperature is too high, AHS will be turned on automatically.

2)When AHS is set valid in heating mode and DHW mode, it will be turned on in following conditions:

When master unit operates in heating mode, conditions of turning on AHS is same as 1); When master unit operates in DHW mode, if T5 is too low or when ambient temperature is too low, target T5 temperature is too high, AHS will be turned on automatically.

3) When AHS is valid, and the operation of AHS is controlled by M1M2. When M1M2 closes, AHS is turned on. When master unit operates in DHW mode, AHS can't be turned on by closing M1M2.

• TBH (Tank booster heater) Control

TBH should be set via the dip switches on main board (refer to 10.1). TBH is only controlled by master unit. Please refer to 8.1 for specific TBH control.

• Solar energy Control

Solar energy is only controlled by master unit. Please refer to 8.1 for specific solar energy Control.

NOTE

1. Maximum 6 units can be cascaded in on system. One of them is master unit, the others are slave units; Master unit and slave units are distinguished by whether connected to wired controller while powering on. The unit with wired controller is master unit, units without wired controller are slave units; Only master unit can operate in DHW mode. While installation, please check the cascade system diagram and determine the master unit; Before powering on, remove all wired controllers of slave units.

2.SV1、SV2、SV3、P_O、P_C、P_S、T1、T5、TW2、Tbt1、Tsolar、SL1SL2、AHS、TBH、interface are only need to be connected to corresponding terminals on main board of master unit. Please refer to 9.3.1 and 9.7.6.

1. The system is with auto-addressing function. After initial powering on, the master unit will assign addresses for slave units. Slave units will keep the addresses. After powering on again, slave units will still use the previous addresses. The addresses of slave units aren't need set again.

2. If Hd error occurs, please refer to 13.4.

3. It is suggested to use the reversed return water system in order to avoid hydraulic imbalance between each unit in a cascade system.

CAUTION

1. In cascade system, Tbt1 sensor must be connected to master unit and set Tbt1 valid on user interface (refer to 10.5.15). Or all slave units will not work;
2. If outside circulation pump need to be connected in series in system when the head of internal water pump is not enough, outside circulation pump is suggested to be installed after the balance tank.
3. Please ensure that the maximum interval of power-on time of all units doesn't exceed 2min, otherwise the time for querying and allocating addresses will be missed, which may cause the slaves to fail to communicate normally and report Hd error.
4. Maximum 6 units can be cascaded in one system.
5. The outlet pipe of each unit must be installed with a check valve.

8.4 Balance tank volume requirement

NO.	model	Balance tank (L)
1	4~10 kW	≥ 25
2	12~16 kW	≥ 40
3	Cascade system	≥ 40^*n
n:The outdoor unit numbers

9 OVERVIEW OF THE UNIT

9.1 Disassembling the unit

Door 1 To access to the compressor and electrical parts and hydraulic compartment

Door 1 To access to the compressor and electrical parts.
Door 2 To access to the hydraulic compartment and electrical parts.

Technical line drawing of a fan or vent with radial blades and central hub, labeled '4/6kW' at bottom (no other text or symbols)

Diagram of a circular fan or vent with radial blades, labeled '8/10/12/14/16kW' at bottom (no other text or symbols)

WARNING

• Switch off all power — i.e. unit power supply and backup heater and domestic hot water tank power supply (if applicable) — before removing door 1 and door 2.
• Parts inside the unit may be hot.

9.2 Main components

9.2.1 Hydraulic module

4/6 kW without backup heater

4/6 kW with backup heater(optional)

8\~16 kW without backup heater 8\~16 kW with backup heater(optional)

Code	Assembly unit	Explanation
1	Automatic air purge valve	Remaining air in the water circuit will be automatically removed from the water circuit.
2	Backup heater(optional)	Provides additional heating capacity when the heating capacity of the heat pump is insufficient due to very low outdoor temperature. Also protects the external water pipes from freezing.
3	Expansion vessel	Balances water system pressure.
4	Refrigerant gas pipe	/
5	Temperature sensor	Four temperature sensors determine the water and refrigerant temperature at various points in the water circuit.5.1-T2B; 5.2-T2; 5.3-T1(optional); 5.4-TW_out; 5.5-TW_in
6	Refrigerant liquid pipe	/
7	Flow switch	Detects water flow rate to protect compressor and water pump in the event of insufficient water flow.
8	Pump	Circulates water in the water circuit.
9	Plate heat exchanger	Transfer heat from the refrigerant to the water.
10	Water outlet pipe	/
11	Pressure relief valve	Prevents excessive water pressure by opening at 3 bar and discharging water from the water circuit.
12	Water inlet pipe	/

9.3 Electronic control box

Note: The picture is for reference only, please refer to the actual product.

12/14/16kW(1-phase)

9.3.1 Main control board of hydraulic module

Order	Port	Code	Assembly unit	Order	Port	Code	Assembly unit
1	CN21	POWER	Port for power supply	19	CN36	M1 M2	Port for remote switch
2	S3	/	Rotary dip switch			T1 T2	Port for thermostat transfer board
3	DIS1	/	Digital display	20	CN19	P Q	Communicate port between indoor unit and outdoor unit
4	CN5	GND	Port for ground	21	CN14	A B X Y E	Port for communication with the wired controller
5	CN28	PUMP	Port for variable speed pump power input	22	CN30	1 2 3 4 5	Port for communication with the wired controller
6	CN25	DEBUG	Port for IC programming			6 7	Communication port between indoor unit and outdoor unit
7	S1,S2,S4,SW9	/	Dip switch			9 10	Port for Internal machine Cascade
8	CN4	USB	Port for USB programming	23	CN7	26 30/31 32	Compressor run/Defrost run
9	CN8	FS	Port for flow switch			25 29	Port for antifreeze E-heating tape(external)
10	CN6	T2	Port for temperature sensors of refrigerant liquid side temperature of indoor unit (heating mode)	24	CN11	27 28	Port for additional heat source
		T2B	Port for temperature sensors of refrigerant gas side temperature of indoor unit (cooling mode)			1 2	Input port for solar energy
		TW_in	Port for temperature sensors of inlet water temperature of plate heat exchanger			3 4 15	Port for room thermostat
						5 6 16	Port for SV1(3-way valve)
						7 8 17	Port for SV2(3-way valve)
		TW_out	Port for temperature sensors of outlet water temperature of plate heat exchanger			9 21	Port for zone 2 pump
		T1	Port for temperature sensors of final outlet water temperature of indoor unit			10 22	Port for outside circulation pump
						11 23	Port for solar energy pump
11	CN24	Tbt1	Port for upper temperature sensor of balance tank			12 24	Port for DHW pipe pump
						13 16	Control port for tank booster heater
12	CN16	Tbt2	Port for lower temperature sensor of balance tank			14 17	Control port for internal backup heater 1
						18 19 20	Port for SV3(3-way valve)
13	CN13	T5	Port for domestic hot water tank temp. sensor	25	CN2	TBH_FB	Feedback port for external temperature switch(shorted in default)
14	CN15	Tw2	Port for outlet water for zone 2 temp. sensor
15	CN18	Tsolar	Port for solar panel temp sensor	26	CN1	IBH1/2_FB	Feedback port for temperature switch (shorted in default)
16	CN17	PUMP_BP	Port for variable speedpump communication
17	CN31	HT	Control port for room thermostat (heating mode)	27	CN22	IBH1	Control port for internal backup heater 1
		COM	Power port for room thermostat			IBH2	Reserved
						TBH	Control port for tank booster heater
		CL	Control port for room thermostat (cooling mode)	28	CN41	HEAT8	Port for anti-freeze electric heating tape(internal)
18	CN35	SG	Port for smart grid (grid signal)	29	CN40	HEAT7	Port for anti-freeze electric heating tape(internal)
		EVU	Port for smart grid (photovoltaic signal)	30	CN42	HEAT6	Port for anti-freeze electric heating tape(internal)
				31	CN29	HEAT5	Port for anti-freeze electric heating tape(internal)
				32	CN32	IBH0	Port for backup heater

9.3.2 1-phase for 4-16kW units

1) PCB A, 4-10kW, Inverter module

	Assembly unit Assembly unitCode	Code
1	Compressor connection port U	6	Reserved(CN302)
2	Compressor connection port V	7	Port for communication with PCB B(CN32)
3	Compressor connection port W	8	Input port N for rectifier bridge(CN502)
4	Output port for +12V/9V(CN20)	9	Input port L for rectifier bridge(CN501)
5	Port for fan(CN19)	/	/

2) PCB A, 12-16kW, Inverter module

	Assembly unit Assembly unitCode	Code
1	Compressor connection port U	6	Port for communication with PCB B(CN32)
2	Compressor connection port V	7	Port for high pressure switch (CN23)
3	Compressor connection port W Reserved(C&I6)
4	Port for fan(CN19)	9	Input port L for rectifier bridge(CN501)
5	Output port for +12V/9V(CN20)	10	Input port N for rectifier bridge(CN502)

2) PCB B, Main control board of heat pump system

Code	Assembly unit Assembly unitCode
1	Output port L to PCB A(CN28)	18	Port for low pressure switch (CN14)
2	Reserved(CN22)	19	Port for communication with hydro-box control board (CN29)
3	Output port N to PCB A(CN27)	20	Reserved(CN20)
4	Reserved(CN3)	21	Reserved(CN38)
5	Port for ground wire(PE2)	22	Reserved(CN37)
6	Digital display(DSP1)	23	Reserved(CN36)
7	Port for communication with PCB A(CN17)	24	Port for communication(reserved,CN30)
8	Port for ground wire(PE1)	25	Port for communication(reserved,CN2)
9	Reserved(CN26)	26	Reserved(CN55)
10	Input port for neutral wire(CN10)		Port for electrical expansion valve(CN33)27
11	Input port for live wire(CN11)	28	Reserved(CN21)
12	Port for outdoor ambient temp. sensor and condenser temp.sensor(CN9)	29	Reserved(CN19)
13	Input port for +12V/9V(CN24)	30	Port for chassis electrical heating tape(CN16) (optional)
14	Port for sunction temp.sensor(CN1)	31	Port for 4-way valve(CN6)
15	Port for discharge temp.sensor(CN8)	32	Port for SV6 valve(CN5)
16	Port for pressure sensor(CN4)	33	Port for compressor eletric heating tape 1(CN7)
17	Port for high pressure switch (CN13)	34	Port for compressor eletric heating tape 2(CN18)

9.3.3 3-phase for 12/14/16 kW units

1) PCB A, Inverter module

	Assembly unit Assembly unitCode	Code
1	Output port for +15V(CN20)	8	Power Input port L1 (CN16)
2	Compressor connection port W(CN19)	9	Input port P_in for IPM module (CN1)
3	Compressor connection port V(CN18)	10	Port for communication with PCB B (CN8)
4	Compressor connection port U(CN17)	11	PED board(CN22)
5	Power Input port L3(CN15)	12	Port for high pressure switch (CN23)
6	Power Input port L2(CN7)	13	Port for communication with PCB C(CN2)
7	Input port P_out for IPM module(CN5)

2) PCB B, Main control board of heat pump system

Code	Assembly unit	Code	Assembly unit
1	Port for ground wire(CN38)	16	Port for temp.sensor Tp(CN8)
2	Port for 2-way valve 6(CN27)	17	Port for outdoor ambient temp. sensor and condenser temp.sensor(CN9)
3	Port for 2-way valve 5(CN20)	18	Digital display(DSP1)
4	Port for eletric heating tape2(CN7)	19	DIP switch(S5,S6)
5	Port for eletric heating tape1(CN10)	20	Port for low pressure switch(CN31)
6	Reserved(CN11)	21	Port for high pressure switch and quick check(CN29)
7	Port for 4-way valve(CN18)	22	Rotary dip switch(S3)
8	Reserved(CN21)	23	Port for temp.sensors(TW_out, TW_in, T1, T2,T2B )(CN35)(Reserved)
9	Power supply port from PCB C(CN41)	24	Port for communication XYE(CN28)
10	Port for communication with Power Meter(CN26)	25	Key for force cool&check(S3,S4)
11	Port for communication with hydro-box control board (CN24)	26	Port for communication H1H2E(CN37)
12	Port for communication with PCB C(CN4)	27	Port for electrical expansion valve(CN22)
13	Port for pressure sensor(CN6)	28	Port for fan 15VDC power supply(CN30)
14	Port for communication with PCB A(CN36)	29	Port for fan 310VDC power supply(CN53)
15	Port for temp.sensor Th(CN5)	30	Port for fan(CN109)

3) PCB C, filter board

PCB C 3-phase 12/14/16kW

Code Code	Assembly unit Assembly unit
1	Power supply L2(CN201)	9	Port for communication with PCB B (CN8)
2	Power supply L3(CN200)	10	Power filtering L3(L3')
3	Power supply N(CN203)	11	Power filtering L2(L2')
4	Power supply port of 310VDC(CN212)	12	Power filtering L1(L1')
5	Reserved(CN211)	13	Power supply port for main control board(CN30)
6	Port for FAN Reactor(CN213)	14	Port for ground wire(PE2)
7	Power supply port for Inverter module(CN214)	15	Port for ground wire(PE1)
8	Ground wire(PE3)	16	Power supply L1(L1)

9.3.4 Controls parts for backup heater(Optional)

1-phase 4/6kW with backup heater(1-phase 3kW)

1-phase 8-16kW with backup heater(1-phase 3kW) 3-phase 12-16kW with backup heater(1-phase 3kW)

1-phase 8-16kW with backup heater(3-phase 9kW) 3-phase 12-16kW with backup heater(3-phase 9kW)

Code	Assembly unit	Code	Assembly unit
1	Auto thermal protector	4	Backup heater contactor KM2
2	Manu thermal protector	5	Backup heater contactor KM3
3	Backup heater contactor KM1

9.4 Water piping

All piping lengths and distances have been taken into consideration.

Requirements

The maximum allowed thermistor cable length is 20m. This is the maximum allowable distance between the domestic hot water tank and the unit (only for installations with a domestic hot water tank). The thermistor cable supplied with the domestic hot water tank is 10m in length. In order to optimize efficiency we recommend installing the 3-way valve and the domestic hot water tank as close as possible to the unit.

NOTE

If the installation is equipped with a domestic hot water tank (field supply), please refer to the domestic hot water tank Installation And Owner's Manual. If there is no glycol (anti-freeze) in the system and there is a power supply or pump failure, drain the system (as shown in the figure below).

Diagram of a vertical structure with a fan and directional arrows, possibly indicating airflow or ventilation (no text or symbols present)

NOTE

If water is not removed from the system in freezing weather when unit is not used, the frozen water may damage the water circle parts.

9.4.1 Check the water circuit

The unit is equipped with a water inlet and water outlet for connection to a water circuit. This circuit must be provided by a licensed technician and must comply with local laws and regulations.

The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive corrosion of the water piping.

Example:

graph LR
    A["Outdoor 1"] --> B["Modbus 14"]
    B --> C["Indoor 4.1"]
    C --> D["Indoor 5"]
    D --> E["FHL1 FHL2 FHLn 19"]
    E --> F["Indoor 20"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333

Code	Assembly unit Code Assembly unit
1	Main unit	12	Filter (Accessory)
2	User interface(accessory)	14	Shut-off valve (Field supply)
4	Balance tank (Field supply)	15	Filling valve (Field supply)
4.1	Automatic air purge valve	16	Drainage valve (Field supply)
4.2	Drainage valve	19	Collector/distributor (Field supply)
5	P_o: Outside circulation pump(Field supply)	20	Bypass valve (field supply)
10	Expansion vessel(field supply)	FHL1...n	Floor heating loop (Field supply)

Before continuing the installation of the unit, check the following:

• The maximum water pressure ≤ 3 bar.
- The maximum water temperature ≤ 70^ according to safety device setting.
• Always use materials that are compatible with the water used in the system and with the materials used in the unit.
- Ensure that components installed in the field piping can withstand the water pressure and temperature.
- Drain taps must be provided at all low points of the system to permit complete drainage of the circuit during maintenance.
- Air vents must be provided at all high points of the system. The vents should be located at points that are easily accessible for service. An automatic air purge valve is provided inside the unit. Check that this air purge valve is not tightened so that automatic release of air in the water circuit is possible.

9.4.2 Water volume and sizing expansion vessels

The units are equipped with an expansion vessel of 8L that has a default pre-pressure of 1.0 bar. To assure proper operation of the unit, the pre-pressure of the expansion vessel might need to be adjusted.

1) Check that the total water volume in the installation, excluding the internal water volume of the unit, is at least 40L. See 14 "Technical specifications" to find the total internal water volume of the unit.

NOTE

• In most applications this minimum water volume will be satisfactory.
- In critical processes or in rooms with a high heat load though, extra water might be required.
- When circulation in each space heating loop is controlled by remotely controlled valves, it is important that this minimum water volume is kept even if all the valves are closed.

2) Expansion vessel volume must fit the total water system volume.
3) To size the expansion for the heating and cooling circuit.

The expansion vessel volume can follow the figure below:

9.4.3 Water circuit connection

Water connections must be made correctly in accordance with labels on the outdoor unit, with respect to the water inlet and water outlet.

CAUTION

Be careful not to deform the unit's piping by using excessive force when connecting the piping. Deforming the piping can cause the unit to malfunction.

If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit:

• Use clean pipes only.
- Hold the pipe end downwards when removing burrs.
- Cover the pipe end when inserting it through a wall to prevent dust and dirt entering.
- Use a good thread sealant for sealing the connections. The sealing must be able to withstand the pressures and temperatures of the system.
- When using non-copper metallic piping, be sure to insulate two kind of materials from each other to prevent galvanic corrosion.

- For copper is a soft material, use appropriate tools for connecting the water circuit. Inappropriate tools will cause damage to the pipes.

NOTE

The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive corrosion of the water piping:

• Never use Zn-coated parts in the water circuit. Excessive corrosion of these parts may occur as copper piping is used in the unit's internal water circuit.
• When using a 3-way valve in the water circuit. Preferably choose a ball type 3-way valve to guarantee full separation between the domestic hot water and floor heating water circuit.
• When using a 3-way valve or a 2-way valve in the water circuit. The recommended maximum changeover time of the valve should be less than 60 seconds.

9.4.4 Water circuit anti-freeze protection

All internal hydronic parts are insulated to reduce heat loss. Insulation must also be added to the field piping.

In event of a power failure, the above features would not protect the unit from freezing.

The software contains special functions using the heat pump and backup heater (if it is available) to protect the entire system against freezing. When the temperature of the water flow in the system drops to a certain value, the unit will heat the water, either using the heat pump, the electric heating tap, or the backup heater. The freeze protection function will turn off only when the temperature increases to a certain value.

Water may enter into the flow switch and cannot be drained out and may freeze when the temperature is low enough. The flow switch should be removed and dried, then can be reinstalled in the unit.

NOTE

CounterclockWise rotation, remove the flow switch. Drying the flow switch completely.

CAUTION

When the unit is not running for a long time, make sure the unit is powered on all the time. If you want to cut off the power, the water in the system pipe needs to be drained clean to avoid the unit and pipeline system being damaged by freezing. Also the power of the unit needs to be cut off after water in the system is drained off.

WARNING

Ethylene Glycol and Propylene Glycol are TOXIC

9.5 Filling water

• Connect the water supply to the filling valve and open the valve.
• Make sure the automatic air purge valve is open (at least 2 turns).
• Fill with water pressure of approximately 2.0 bar. Remove air in the circuit as much as possible using the air purge valves. Air in the water circuit could lead to malfunction of the backup electric heater.

Do not fasten the black plastic cover on the vent valve at the topside of the unit when the system is running. Open air purge valve, turn anticlockWise at least 2 full turns to release air from the system.

Technical line drawing of a mechanical assembly with pipes and components (no text or symbols)

NOTE

During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the automatic air purge valves during the first operating hours of the system. Topping up the water afterwards might be required.

• The water pressure will vary depending on the water temperature (higher pressure at higher water temperature). However, at all times water pressure should remain above 0.3 bar to avoid air entering the circuit.
  • The unit might drain-off too much water through the pressure relief valve.
  • Water quality should be complied with EN 98/83 EC Directives.
  • Detailed water quality condition can be found in EN 98/83 EC Directives.

9.6 Water piping insulation

The complete water circuit including all piping, water piping must be insulated to prevent condensation during cooling operation and reduction of the heating and cooling capacity as well as prevention of freezing of the outside water piping during winter. The insulation material should at least of B1 fire resistance rating and complies with all applicable legislation. The thickness of the sealing materials must be at least 13 mm with thermal conductivity 0.039 W/mK in order to prevent freezing on the outside water piping.

If the outdoor ambient temperature is higher than 30^ C and the humidity is higher than RH 80%, then the thickness of the sealing materials should be at least 20 mm in order to avoid condensation on the surface of the seal.

9.7 Field wiring

WARNING

A main switch or other means of disconnection, having a contact separation in all poles, must be incorporated in the fixed wiring in accordance with relevant local laws and regulations. Switch off the power supply before making any connections. Use only copper wires. Never squeeze bundled cables and make sure they do not come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections. All field wiring and components must be installed by a licensed electrician and must comply with relevant local laws and regulations.

The field wiring must be carried out in accordance with the wiring diagram supplied with the unit and the instructions given below.

Be sure to use a dedicated power supply. Never use a power supply shared by another appliance.

Be sure to establish a ground. Do not ground the unit to a utility pipe, surge protector, or telephone ground. Incomplete grounding may cause electrical shock.

Be sure to install a ground fault circuit interrupter (30 mA). Failure to do so may cause electrical shock.

Be sure to install the required fuses or circuit breakers.

9.7.1 Precautions on electrical wiring work

• Fix cables so that cables do not make contact with the pipes (especially on the high pressure side).
• Secure the electrical wiring with cable ties so that it does not come in contact with the piping, particularly on the high-pressure side.
  • Make sure no external pressure is applied to the terminal connectors.
• When installing the ground fault circuit interrupter make sure that it is compatible with the inverter (resistant to high frequency electrical noise) to avoid unnecessary opening of the ground fault circuit interrupter.

NOTE

The ground fault circuit interrupter must be a high-speed type breaker of 30 mA (<0.1 s).

- This unit is equipped with an inverter. Installing a phase advancing capacitor not only will reduce the power factor improvement effect, but also may cause abnormal heating of the capacitor due to high-frequency waves. Never install a phase advancing capacitor as it could lead to an accident.

9.7.2 Wiring overview

The illustration below gives an overview of the required field wiring between several parts of the installation.

graph TD
    A["1"] --> B["B"]
    B --> C["T"]
    C --> D["D"]
    D --> E["H"]
    E --> F["K"]
    F --> G["L"]
    G --> H["G"]
    H --> I["J"]
    I --> J["K"]
    J --> K["G"]
    K --> L["E"]
    L --> M["F"]
    M --> N["K"]
    N --> O["L"]
    O --> P["F"]
    P --> Q["H"]
    Q --> R["K"]
    R --> S["L"]
    S --> T["F"]
    T --> U["K"]
    U --> V["L"]
    V --> W["F"]
    W --> X["H"]
    X --> Y["K"]
    Y --> Z["L"]
    Z --> AA["F"]
    AA --> AB["K"]
    AB --> AC["L"]
    AC --> AD["F"]
    AD --> AE["H"]
    AE --> AF["K"]
    AF --> AG["L"]
    AG --> AH["F"]
    AH --> AI["H"]
    AI --> AJ["K"]
    AJ --> AK["L"]
    AK --> AL["F"]
    AL --> AM["H"]
    AM --> AN["K"]
    AN --> AO["L"]
    AO --> AP["F"]
    AP --> AQ["H"]
    AQ --> AR["K"]
    AR --> AS["L"]
    AS --> AT["F"]
    AT --> AU["H"]
    AU --> AV["K"]
    AV --> AW["L"]
    AW --> AX["F"]
    AX --> AY["H"]
    AY --> AZ["K"]
    AZ --> BA["L"]
    BA --> BB["F"]
    BB --> BC["H"]
    BC --> BD["K"]
    BD --> BE["4"]
    BE --> BF["7"]
    BF --> BG["9"]
    BG --> BH["6"]
    BH --> BI["C"]

Code	Assembly unit	Code	Assembly unit
A	Main unit	G	P_d:DHW pump(field supply)
B	Solar energy kit(field supply)	H	SV2:3-way valve(field supply)
C	User interface	I	SV1:3-way valve for domestic hot water tank(field supply)
D	High voltage room thermostat(field supply)	J	Booster heater
E	P_s:Solar pump(field supply)	K	Contactor
F	P_o:Outside circulation pump(field supply)	L	Power supply

Item	Description	AC/DC	Required number of conductors	Maximum running current
1	Solar energy kit signal cable AC		2	200mA
2	User interface cable	AC	5	200mA
3	Room thermostat cable	AC	2	200mA(a)
4	Solar pump control cable	AC	2	200mA(a)
5	Outside circulation pump control cable	AC	2	200mA(a)
6	DHW pump control cable	AC	2	200mA(a)
7	SV2: 3-way valve control cable	AC 200mA(a)	3
8	SV1: 3-way valve control cable	AC	3	200mA(a)
9	Booster heater control cable	AC	2	200mA(a)

(a) Minimum cable section AWG18 (0.75 mm ^2 ).
(b)The thermistor cable are delivered with the unit: if the current of the load is large, an AC contactor is needed.

Please use H07RN-F for the power wire, all the cable are connect to high voltage except for thermistor cable and cable for user interface.

• Equipment must be grounded.
- All high-voltage external load, if it is metal or a grounded port, must be grounded.
- All external load current is needed less than 0.2A, if the single load current is greater than 0.2A, the load must be controlled through AC contactor.
- AHS1" "AHS2", "A1" "A2", "R1" "R2" and "DFT1" "DFT2" wiring terminal ports provide only the switch signal. Please refer to image of 9.7.6 to get the ports position in the unit.
- Expansion valve E-Heating tape, Plate heat exchanger E-Heating tape and Flow switch E-Heating tape share a control port.

	Assembly unitCode
1	High voltage wire hole
2	Low voltage wire hole
3	Drainage pipe hole
4	Water outlet
5	Water inlet

Field wiring guidelines

- Most field wiring on the unit is to be made on the terminal block inside the switch box. To gain access to the terminal block, remove the switch box service panel (door 2).

WARNING

Switch off all power including the unit power supply and backup heater and domestic hot water tank power supply (if applicable) before removing the switch box service panel.

• Fix all cables using cable ties.
- A dedicated power circuit is required for the backup heater.
- Installations equipped with a domestic hot water tank (field supply) require a dedicated power circuit for the booster heater. Please refer to the domestic hot water tank Installation & Owner's Manual. Secure the wiring as shown in the picture below.
- Lay out the electrical wiring so that the front cover does not rise up when doing wiring work and attach the front cover securely.
- Follow the electric wiring diagram for electrical wiring works (the electric wiring diagrams are located on the rear side of door 2.
• Install the wires and fix the cover firmly so that the cover fit in properly.

9.7.3 Precautions on wiring of power supply

• Use a round crimp-style terminal for connection to the power supply terminal board. In case it cannot be used due to unavoidable reasons, be sure to observe the following instructions.
• Do not connect different gauge wires to the same power supply terminal. (Loose connections may cause overheating.)
• When connecting wires of the same gauge, connect them according to the figure below.

Simple icon of a device with two cylindrical ports and a checkmark (no text or symbols)

Simple diagram of a vehicle or container with a black cylindrical object inside and a cross symbol nearby (no text or labels)

Simple icon of a graduation cap with two eyes and a cross symbol (no text or labels)

• Use the correct screwdriver to tighten the terminal screws. Small screwdrivers can damage the screw head and prevent appropriate tightening.
  • Over-tightening the terminal screws can damage the screws.
• Attach a ground fault circuit interrupter and fuse to the power supply line.
• In wiring, make certain that prescribed wires are used, carry out complete connections, and fix the wires so that outside force cannot affect the terminals.

9.7.4 Safety device requirement

1. Select the wire diameters( minimum value) individually for each unit based on the table 9-1 and table 9-2, where the rated current in table 9-1 means MCA in table 9-2. In case the MCA exceeds 63A, the wire diameters should be selected according to the national wiring regulation.
2. Maximum allowable voltage range variation between phases is 2%.
3. Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection, where MFA is used to select the current circuit breakers and residual current operation breakers.

Table 9-1

Rated current of appliance: (A)	Nominal cross-sectional area ( mm^2 )
	Flexible cords	Cable for fixed wiring
≤3	0.5 and 0.75	1 and 2.5
>3 and ≤6	0.75 and 1	1 and 2.5
>6 and ≤10	1 and 1.5	1 and 2.5
>10 and ≤16	1.5 and 2.5	1.5 and 4
>16 and ≤25	2.5 and 4	2.5 and 6
>25 and ≤32	4 and 6	4 and 10
>32 and ≤50	6 and 10	6 and 16
>50 and ≤63	10 and 16	10 and 25

Table 9-2
1-phase 4-16kW standard and 3-phase 12-16kW standard

System	Outdoor Unit Power Current Compressor OFM
	Voltage (V)	Hz Min. (V)	Max. (V)	MCA (A)	TOCA (A)	MFA (A)	MSC (A)	RLA (A)	KW FLA	(A)
4kW	220-240	50	198	264	12	18	25	-	11.50	0.10	0.50
6kW				264 252204248		50 198		-	13.50	0.10	0.50
8kW						19264	25220-240	- 50 198	14.50	0.17	1.5016
10kW				264196	252209240	50		-	15.50	0.17	1.50
				1254796	352200240	50		-	23.50	0.17	1.50
				1254796	352200240	50		-	24.50	0.17	1.50
				1254796	352200240	50		-	25.50	0.17	1.50
				12kV663R0	1638044	15	50	-	9.15	0.17	1.50
				14kV663R0	1638044	15	50	-	10.15	0.17	1.50
				16kV663R0	1638044	15	50	-	11.15	0.17	1.50

1-phase 4-16kW and 3-phase 12-16kW standard with backup heater 3kW

System	Outdoor Unit Power Current Compressor							OFM
	Voltage (V)	Hz Mir. (V)	Max. (V)	MCA (A)	TOCA (A)	MFA (A)	MSC (A)	RLA (A)	KW FLA (A)
4kW	220-240	50	198	264	25	31	38	-	11.50	0.10	0.50
6kW				264 38	220-240	50 198		-	13.50	0.10	0.50
8kW						32264	38220-240	- 50 198	14.50	0.17	1.5029
10kW				264198	380202	40 50		-	15.50	0.17	1.50
				1284798	488202	40 50		-	23.50	0.17	1.50
				1284798	488202	40 50		-	24.50	0.17	1.50
				1284798	488202	40 50		-	25.50	0.17	1.50
			12	x756349	2938274	15 50		-	9.15	0.17	1.50
			14	x756349	2938274	15 50		-	10.15	0.17	1.50
			16	x756349	2938274	15 50		-	11.15	0.17	1.50

1-phase 8-16kW and 3-phase 12-16kW standard with backup heater 9kW

System	Outdoor Unit Power Current Compressor							OFM
	Voltage (V)	Hz Min.	Max. (V)	MCA (A)	TOCA (A)	MFA (A)	MSC (A)	RLA (A)	KW FLA	(A)
8kW	380-415	50	342	456	29	32	38	-	14.50	0.17	1.50
10kW	380-415	50	342	456	30	32	38	-	15.50	0.17	1.50
12kW	380-415	50	342	456	38	43	48	-	23.50	0.17	1.50
14kW	380-415	50	342	456	39	43	48	-	24.50	0.17	1.50
16kW	380-415	50	342	456	40	43	48	-	25.50	0.17	1.50
12kW 3-PH	380-415	50	342	456	23	27	29	-	9.15	0.17	1.50
14kW 3-PH	380-415	50	342	456	24	27	29	-	10.15	0.17	1.50
16kW 3-PH	380-415	50	342	456	25	27	29	-	11.15	0.17	1.50

NOTE

MCA : Min. Circuit Amps. (A)

TOCA : Total Over-current Amps. (A)

MFA : Max. Fuse Amps. (A)

MSC : Max. Starting Amps. (A)

RLA: In nominal cooling or heating test condition, the input Amps of compressor where MAX. Hz can operate Rated Load Amps. (A)

KW : Rated Motor Output

FLA : Full Load Amps. (A)

9.7.5 Remove the switch box cover

1-phase 4-16kW standard and 3-phase 12-16kW standard

Unit 4kW 6kW 8kW 10kW 12kW 14kW 16kW 12kW 3-PH 14kW 3-PH 16kW 3-PH
Maximum overcurrent protector(MOP)(A)	18 18	19 19 30 30	30 14 14	14
Wiring size( mm^2 )	4.0 4.0	4.0 4.0	6.0 6.0 6.0	2.5 2.5 2.5

1-phase 4-16kW and 3-phase 12-16kW standard with backup heater 3kW (1-phase)

Unit 4kW 6kW 8kW 10kW 12kW 14kW 16kW 12kW 3-FH 14kW 3-PH 16kW 3-PH
Maximum overcurrent protector(MOP)(A)	31	31	32	32	43	43	43	27	27	27
Wiring size(mm2)	6.0 6.0	8.0 8.0	10.0	0.0 10.0 4.0		4.0 4.0

1-phase 8-16kW and 3-phase 12-16kW standard with backup heater 9kW(3-phase)

Unit	8kW 10kW 12kW		14kW 16kW		12kW 3-PH 14kW 3-PH 16kW 3-PH
Maximum overcurrent protector(MOP)(A)	32	32	43	43	43	27	27	27
Wiring size( mm^2 )	8.0 8.0	10.0 10.0	10.0 4.0	4.0 4.0

1-phase

1-phase

3-phase

3-phase

NOTE

The ground fault circuit interrupter must be 1 high-speed type of 30mA(<0.1s). Please use 3-core shielded wire. The default of backup heater is option 3 (for 9kW backup heater). If 3kW or 6kW backup heater is needed, please ask professional installer to change the Dip switch of S1 to option 1(for 3kW backup heater) or option 2(for 6kW backup heater), refer to 10.1.1 FUNCTION SETTING. Stated values are maximum values (see electrical data for exact values).

graph TD
    A["Master unit"] --> B["CN30"]
    B --> C["ON/OFF switch"]
    B --> D["Fuse"]
    B --> E["Power supply"]
    B --> F["Distribution box"]
    B --> G["Distribution box"]
    B --> H["Distribution box"]
    B --> I["Distribution box"]
    J["SW9"] --> K["OFF Slave unit"]
    J --> L["ON Master unit"]
    M["Slave unit 1"] --> N["SLAVE"]
    O["Slave unit 2"] --> P["SLAVE"]
    Q["Slave unit x"] --> R["SLAVE"]
    S["Build-out resistor"] --> T["Only the last IDU requires adding the build-out resistor at H1 and H2."]
    U["Please use the shielded wire, and the shield layer must be grounded."] --> V["Please use the shielded wire, and the shield layer must be grounded."]

graph TD
    A["Power supply"] --> B["On/Off switch"]
    B --> C["Fuse"]
    C --> D["Distribution box"]
    D --> E["CN30"]
    E --> F["Master unit"]
    F --> G["ON/OFF switch"]
    G --> H["Fuse"]
    H --> I["Distribution box"]
    I --> J["CN30"]
    J --> K["Fuse"]
    K --> L["Distribution box"]
    L --> M["CN30"]
    M --> N["Fuse"]
    N --> O["Distribution box"]
    O --> P["CN30"]
    P --> Q["Fuse"]
    Q --> R["Distribution box"]
    R --> S["CN30"]
    S --> T["Fuse"]
    T --> U["Distribution box"]
    U --> V["CN30"]
    V --> W["Fuse"]
    W --> X["Distribution box"]
    X --> Y["CN30"]
    Y --> Z["Fuse"]
    Z --> AA["Distribution box"]
    AA --> AB["CN30"]
    AB --> AC["Fuse"]
    AC --> AD["Distribution box"]
    AD --> AE["CN30"]
    AE --> AF["Fuse"]
    AF --> AG["Distribution box"]
    AG --> AH["CN30"]
    AH --> AI["Fuse"]
    AI --> AJ["Distribution box"]
    AJ --> AK["CN30"]
    AK --> AL["Fuse"]
    AL --> AM["Distribution box"]
    AM --> AN["CN30"]
    AN --> AO["Fuse"]
    AO --> AP["Distribution box"]
    AP --> AQ["CN30"]
    AQ --> AR["Fuse"]
    AR --> AS["Distribution box"]
    AS --> AT["CN30"]
    AT --> AU["Fuse"]
    AU --> AV["Distribution box"]
    AV --> AW["CN30"]
    AW --> AX["Fuse"]
    AX --> AY["Distribution box"]
    AY --> AZ["CN30"]
    AZ --> BA["Fuse"]
    BA --> BB["Distribution box"]
    BB --> BC["CN30"]
    BC --> BD["Fuse"]
    BD --> BE["Distribution box"]
    BE --> BF["CN30"]
    BF --> BG["Fuse"]
    BG --> BH["Distribution box"]
    BH --> BI["CN30"]
    BI --> BJ["Fuse"]
    BJ --> BK["Distribution box"]
    BK --> BL["CN30"]
    BL --> BM["Fuse"]
    BM --> BN["Distribution box"]
    BN --> BO["CN30"]
    BO --> BP["Fuse"]
    BP --> BQ["Distribution box"]
    BQ --> BR["CN30"]
    BR --> BS["Fuse"]
    BS --> BT["Distribution box"]
    BT --> BU["CN30"]
    BU --> BV["Fuse"]
    BV --> BW["Distribution box"]
    BW --> BX["CN30"]
    BX --> BY["Fuse"]
    BY --> BZ["Distribution box"]
    BZ --> CA["Fuse"]
    CA --> CB["Distribution box"]

CAUTION

1、The cascade function of the system only supports 6 machines at most.
2、In order to ensure the success of automatic addressing, all machines must be connected to the same power supply and powered on uniformly.
3、Only the Master unit can connect the controller, and you must put the SW9 to "on" of the master unit, the slave unit cannot connect the controller.
4、Please use the shielded wire, and the shield layer must be grounded.

When connecting to the power supply terminal, use the circular wiring terminal with the insulation casing (see Figure 9.1).

Use power cord that conforms to the specifications and connect the power cord firmly. To prevent the cord from being pulled out by external force, make sure it is fixed securely.

If circular wiring terminal with the insulation casing cannot be used, please make sure that:

- Do not connect two power cords with different diameters to the same power supply terminal (may cause overheating of wires due to loose wiring) (See Figure 9.2).

Figure 9.1

Figure 9.2

Power Cord Connection of cascade system

Use a dedicated power supply for the indoor unit that is different from the power supply for the outdoor unit.
• Use the same power supply, circuit breaker and leakage protective device for the indoor units connected to the same outdoor unit.

Figure 9.3

9.7.6 Connection for other components

unit 4-16kW

CN11	Code	Print		Connect to
	1	1	SL1	Solar energy input signal
		2	SL2
	2	3	H	Room thermostat input (high voltage)
		4	C
		15	1
	3	5	1ON	SV1(3-way valve)
		6	1OFF
		16	N
	4	7	2ON	SV2(3-way valve)
		8	2OFF
		17	N
	5	9	P_c	Pumpc(zone2 pump)
		21	N
	6	10	P_o	Outside circulation pum /zone1 pump
		22	N
	7	11	P_s	Solar energy pump
		23	N
	8	12	P_d	DHW pipe pump
		24	N
	9	13	BH	Tank booster heater
		16	N
	10	14	BH1	Internal backup heater 1
		17	N
	11	18	N	SV3(3-way valve)
		19	3ON
		20	3OFF

CN30	Code	Print		Connect to
	1	1	A	Wired controller
		2	B
		3	X
		4	Y
		5	E
	2	6	P	Outdoor unit
		7	Q
	3	9	H1	Internal machine cascade
		10 H2

CN7	Code	Print		Connect to
	1	26 R2		Com pressor run
		30 R1
		31 DFT2		Defrost or alarm signal
		32 DFT1
	2	25 HT		Antifreeze E-heating tape(external)
		29	N
	3	27	AHS1	Additional heat source
		28	AHS2

Port provide the control signal to the load. Two kind of control signal port:

Type 1: Dry connector without voltage.

Type 2: Port provide the signal with 220V voltage. If the current of load is <0.2A, load can connect to the port directly.

If the current of load is >=0.2A, the AC contactor is required to connected for the load.

Type 1 Running

Control signal port of hydraulic module: The CN11/CN7 contains terminals for solar energy, 3-way valve, pump, booster heater, etc.
The parts wiring is illustrated below:

1) For solar energy input signal:

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm ^2 )	0.75

2) For 3-way valve SV1、SV2 and SV3:

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm2)	0.75
Control port signal type	Type 2

a) Procedure
- Connect the cable to the appropriate terminals as shown in the picture.
• Fix the cable reliably.

3) For remote shut down:

4) For Pumpc and DHW pipe pump:

graph TD
    A["Power supply"] --> B["KM3"]
    B --> C["Pumpc(zone2 pump)"]
    C --> D["DHW pipe pump"]
    D --> E["KM7"]
    E --> F["P-d"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm ^2 )	0.75
Control port signal type	Type 2

a) Procedure
- Connect the cable to the appropriate terminals as shown in the picture.
• Fix the cable reliably.

5) For room thermostat:

Room thermostat type 1(High voltage): "POWER IN" provide the working voltage to the RT, doesn't provide the voltage to the RT connector directly. Port "15 L1" provide the 220V voltage to the RT connector. Port "15 L1" connect from the unit main power supply port L of 1-phase power supply.

Room thermostat type 2(Low voltage) : "POWER IN" provide the working voltage to the RT.

NOTE

There are two optional connect method depend on the room thermostat type.

Room thermostat type 1 (High voltage):

There are three methods for connecting the thermostat cable (as described in the picture above) and it depends on the application.
• Method A (Mode set control)
RT can control heating and cooling individually, like the controller for 4-pipe FCU. When the hydraulic module is connected with the external temperature controller, user interface FOR SERVICEMAN set ROOM THERMOSTAT to MODE SET:

A.1 When unit detects voltage is 230VAC between C and L1, the unit operates in the cooling mode.

A.2 When unit detects voltage is 230VAC between H and L1, the unit operates in the heating mode.

A.3 When unit detects voltage is 0VAC for both side(C-L1, H-L1) the unit stop working for space heating or cooling.

A.4 When unit detects voltage is 230VAC for both side(C-L1, H-L1) the unit working in cooling mode.

• Method B (One zone control)

RT provide the switch signal to unit. User interface FOR SERVICEMAN set ROOM THERMOSTAT to ONE ZONE:

B.1 When unit detects voltage is 230VAC between H and L1, unit turns on.

B.2 When unit detects voltage is 0VAC between H and L1, unit turns off.

Method C (Double zone control)

Hydraulic Module is connected with two room thermostat, while user interface FOR SERVICEMAN set ROOM THERMOSTAT to DOUBLE ZONE:

C.1 When unit detects voltage is 230VAC between H and L1, zone1 turns on. When unit detect voltage is 0VAC between H and L1, zone1 turns off.

C.2 When unit detects voltage is 230VAC between C and L1, zone2 turns on according to climate temp curve. When unit detect voltage is 0V between C and L1, zone2 turns off.

C.3 When H-L1 and C-L1 are detected as 0VAC, unit turns off.

C.4 when H-L1 and C-L1 are detected as 230VAC, both zone1 and zone2 turn on.

Room thermostat type2 (Low voltage):

There are three methods for connecting the thermostat cable (as described in the picture above) and it depends on the application.

• Method A (Mode set control)

RT can control heating and cooling individually, like the controller for 4-pipe FCU. When the hydraulic module is connected with the external temperature controller, user interface FOR SERVICEMAN set ROOM THERMOSTAT to MODE SET:

A.1 When unit detects voltage is 12VDC between CL and COM, the unit operates in the cooling mode.

A.2 When unit detects voltage is 12VDC between HT and COM, the unit operates in the heating mode.

A.3 When unit detects voltage is 0VDC for both side(CL-COM, HT-COM) the unit stop working for space heating or cooling.

A.4 When unit detects voltage is 12VDC for both side(CL-COM, HT-COM) the unit working in cooling mode.

• Method B (One zone control)

RT provide the switch signal to unit. User interface FOR SERVICEMAN set ROOM THERMOSTAT to ONE ZONE:

B.1 When unit detects voltage is 12VDC between HT and COM, unit turns on.

B.2 When unit detects voltage is 0VDC between HT and COM, unit turns off.

• Method C (Double zone control)

Hydraulic Module is connected with two room thermostat, while user interface FOR SERVICEMAN set ROOM THERMOSTAT to DOUBLE ZONE:

C.1 When unit detects voltage is 12VDC between HT and COM, zone1 turn on. When unit detect voltage is 0VDC between HT and COM, zone1 turn off.

C.2 When unit detects voltage is 12VDC between CL and COM, zone2 turn on according to climate temp curve. When unit detect voltage is 0V between CL and COM, zone2 turn off.

C.3 When HT-COM and CL-COM are detected as 0VDC, unit turn off.

C.4 when HT-COM and CL-COM are detected as 12VDC, both zone1 and zone2 turn on.

NOTE

• The wiring of the thermostat should correspond to the settings of the user interface. Refer to 10.5.6 "Room Thermostat".
  • Power supply of machine and room thermostat must be connected to the same Neutral Line.
• When ROOM THERMOSTAT is not set to NON, the indoor temperature sensor Ta can't be set to valid.
• Zone 2 can only operate in heating mode. When cooling mode is set on user interface and zone1 is OFF, "CL" in zone2 closes, system still keeps 'OFF'. While installation, the wiring of thermostats for zone1 and zone2 must be correct.

a) Procedure

• Connect the cable to the appropriate terminals as shown in the picture.
• Fix the cable with cable ties to the cable tie mountings to ensure stress relief.

6) For tank booster heater:

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm ^2 )	0.75
Control port signal type	Type 2

NOTE

The unit only sends an ON/OFF signal to the heater.

7) For additional heat source control:

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size( mm^2 )	0.75
Control port signal type	Type 2

WARNING

This part only applies to Basic. For Customized, cause there is an interval backup heater in the unit, the hydraulic module should not be connected to any additional heat source.

8) For defrosting signal output:

DEFROSTING PROMPT SIGNAL

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm2)	0.75
Control port signal type	Type 1

9) For outside circulation pump P_o:

Voltage	220-240VAC
Maximum running current(A)	0.2
Wiring size(mm ^2 )	0.75
Control port signal type	Type 2

a) Procedure

- Connect the cable to the appropriate terminals as shown in the picture.

- Fix the cable with cable ties to the cable tie mountings to ensure stress relief.

10) For smart grid:

The unit has smart grid function, there are two ports on PCB to connect SG signal and EVU signal as following:

1. When EVU signal is on, and SG signal is on, as long as the DHW mode is set to be valid, heat pump will operate DHW mode priority and the DHW mode setting temperature will be changed to 70°C. T5<69°C, the TBH is on, T5≥70°C, the TBH is off.

2. When EVU signal is on, and SG signal is off, as long as the DHW mode is set to be valid and the mode is on, heat pump will operate DHW mode priority. T5<T5S-2, the TBH is on, T5≥T5S+3, the TBH is off.

3. When EVU signal is off, and SG signal is on, the unit operates normally.

4. When EVU signal is off, and SG signal is off, the unit operates as below: The unit will not operate DHW mode, and the TBH is invalid, disinfect function is invalid. The max running time for cooling/heating is "SG RUNNING TIME", then unit will be off.

10 START-UP AND CONFIGURATION

The unit should be configured by the installer to match the installation environment (outdoor climate, installed options, etc.) and user expertise.

CAUTION

It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable.

10.1 DIP switch settings overview

10.1.1 Function setting

DIP switch S1,S2 and S4 are located on the main control hydraulic module board (see "9.3.1 main control board of hydraulic module").

WARNING

Switch off the power supply before making any changes to the DIP switch settings.

DIP switch

ON=1

OFF=0

Factory defaults

DIP switch

ON=1

OFF=0

Factory defaults

DIP switch

ON=1

OFF=0

Factory defaults

S1

1/23/4

0/0=IBH(One-step control)0/1=IBH(Two-step control)1/1=IBH(Three-step control)

Refer to electrically controlled wiring diagram

S2

1

Start pumpo after 24 hours will be invalid

Start pumpo after 24 hours will be valid

Refer to electrically controlled wiring diagram

S4

1

Master unit: clear addresses of all slave units Slave unit: clear its own address

Keep the current address

Refer to electrically controlled wiring diagram

2

without TBH

with TBH

2

IBH for DHW =valld

BH for DHW =invalld

0/0=Without IBH and AHS1/0=With IBH0/1=With AHS for heat mode1/1=With AHS for heat mode and DHW mode

3/4

0/0=pump 10/1=pump 21/0=pump 31/1=pump 4

3/4

Reserved

10.2 Initial start-up at low outdoor ambient temperature

During initial start-up and when water temperature is low, it is important that the water is heated gradually. Failure to do so may result in concrete floors cracking due to rapid temperature change. Please contact the responsible cast concrete building contractor for further details.

To do so, the lowest water flow set temperature can be decreased to a value between 25^ C and 35^ C by adjusting the FOR SERVICEMAN. Refer to 10.5.12 "SPECIAL FUNCTION".

10.3 Pre-operation checks

Checks before initial start-up.

DANGER

Switch off the power supply before making any connections.

After the installation of the unit, check the following before switching on the circuit breaker:

• Field wiring: Make sure that the field wiring between the local supply panel and unit and valves (when applicable), unit and room thermostat (when applicable), unit and domestic hot water tank, and unit and backup heater kit have been connected according to the instructions described in the chapter 9.7 "Field wiring", according to the wiring diagrams and to local laws and regulations.
• Fuses, circuit breakers, or protection devices Check that the fuses or the locally installed protection devices are of the size and type specified in 14 "Technical specifications". Make sure that no fuses or protection devices have been bypassed.
• Backup heater circuit breaker: Do not forget to turn on the backup heater circuit breaker in the switchbox (it depends on the backup heater type). Refer to the wiring diagram.
• Booster heater circuit breaker: Do not forget to turn on the booster heater circuit breaker (applies only to units with optional domestic hot water tank installed).
• Ground wiring: Make sure that the ground wires have been connected properly and that the ground terminals are tightened.
• Internal wiring: Visually check the switch box for loose connections or damaged electrical components.
• Mounting: Check that the unit is properly mounted, to avoid abnormal noises and vibrations when starting up the unit.
• Damaged equipment: Check the inside of the unit for damaged components or squeezed pipes.
  • Refrigerant leak: Check the inside of the unit for refrigerant leakage. If there is a refrigerant leak, call your local dealer.
• Power supply voltage: Check the power supply voltage on the local supply panel. The voltage must correspond to the voltage on the identification label of the unit.
  • Air purge valve: Make sure the air purge valve is open (at least 2 turns).
• Shut-off valves: Make sure that the shut-off valves are fully open.

10.4 The circulation pump

The relationships between the head and the water flow rated, the PMW Return and the water flow rated are shown in the graph below.

Area of regulation is included in between the max speed curve and the min speed curve.

Available external static pressure VS Flow rate

4-10kW

Available external static pressure VS Flow rate

12-16kW

CAUTION

If the valves are at the incorrect position, the circulation pump will be damaged.

DANGER

If it's necessary to check the running status of the pump when unit power on, please do not touch the internal electronic control box components to avoid electric shock.

Failure diagnosis at first installation

• If nothing is displayed on the user interface, it is necessary to check for any of the following abnormalities before diagnosing possible error codes.
  -Disconnection or wiring error (between power supply and unit and between unit and user interface).

-The fuse on the PCB may be broken.

- If the user interface shows "E8" or "E0" as an error code, there is a possibility that there is air in the system, or the water level in the system is less than the required minimum.

- If the error code E2 is displayed on the user interface, check the wiring between the user interface and unit.

More error code and failure causes can be found in 13.4 "Error codes".

10.5 Field settings

The unit should be configured to match the installation environment (outdoor climate, installed options, etc.) and user demand. A number of field settings are available. These settings are accessible and programmable through “FOR SERVICEMAN” in user interface.

Powering on the unit

When power on the unit, "1%\~99%" is displayed on the user interface during initialization. During this process the user interface cannot be operated.

Procedure

To change one or more field settings, proceed as follows.

NOTE

Temperature values displayed on the wired controller (user interface) are in °C.

Keys Function
@	Go to the menu structure(on the home page)
◀▶▼▲	Navigate the cursor on the displayNavigate in the menu structureAdjust settings
◎	Turn on/off the space heating/cooling operation or DHW modeTurn on/or off functions in the menu structure
⊃	Come back to the up level
&	Long press for unlock /lock the controllerUnlock /lock some functions such as "DHW temperature adjusting"
←	Go to the next step when programming a schedule in the menu structure; and confirm a selection to enter in the submenu of the menu structure.

About FOR SERVICEMAN

"FOR SERVICEMAN" is designed for the installer to set the parameters.

• Setting the composition of equipment.
• Setting the parameters.

How to go to FOR SERVICEMAN

Go to ☐ > FOR SERVICEMAN. Press ←:

Press ◀▶ to navigate and press ▼▲ to adjust the numerical value. Press . The password is 234, the following pages will be displayed after putting the password:

Press ▼ ▲ to scroll and use " ┌" to enter submenu.

DHW = domestic hot water

Go to > FOR SERVICE MAN> 1.DHW MODE SETTING. Press ↙ . The following pages will be displayed:

10.5.2 COOL MODE SETTING

Go to > FOR SERVICE MAN> 2.COOL MODE SETTING. Press ↓.

The following pages will be displayed:

2 COOL MODE SETTING	1/3
2.1 COOL MODE	YES
2.2 t T4 FRESH_C	2.0HRS
2.3 T4CMAX	43°C
2.4 T4CMIN	20°C
2.5 dT1SC	5°C
ADJUST

2 COOL MODE SETTING	2/3
2.6 dTSC	2°C
2.7 t_INTERVAL_C	5MIN
2.8 T1SetC1	10°C
2.9 T1SetC2	16°C
2.10 T4C1	35°C
ADJUST

2 COOL MODE SETTING	3/3
2.11 T4C2	25°C
2.12 ZONE1 C-EMISSION	FCU
2.13 ZONE2 C-EMISSION	FLH
ADJUST

10.5.3 HEAT MODE SETTING

Go to > FOR SERVICE MAN> 3. HEAT MODE ROOM TEMP. to YES, The following pages will be SETTING. Press . The following pages will be displayed:

3 HEAT MODE SETTING	1/3
3.1 HEAT MODE	YES
3.2 t_T4_FRESH_H	2.0HRS
3.3 T4HMAX	16°C
3.4 T4HMIN	-15°C
3.5 dT1SH	5°C
ADJUST

3 HEAT MODE SETTING	2/3
3.6 dTSH	2°C
3.7 t_INTERVAL_H	5MIN
3.8 T1SetH1	35°C
3.9 T1SetH2	28°C
3.10 T4H1	-5°C
ADJUST

3 HEAT MODE SETTING	3/3
3.11 T4H2	7C
3.12 ZONE1 H-EMISSION	RAD.
3.13 ZONE2 H-EMISSION	FLH
3.14 t_DELAY_PUMP	2MIN
ADJUST

10.5.4 AUTO MODE SETTING

Go to > FOR SERVICE MAN> 4.AUTO MODE SETTING. Press ↓, the following page will be displayed.

4 AUTO. MODE SETTING
4.1 T4AUTOCMIN	25°C
4.2 T4AUTOHMAX	17°C
ADJUST

10.5.5 TEMP. TYPE SETTING

About TEMP. TYPE SETTING

The TEMP. TYPE SETTING is used for selecting whether the water flow temperature or room temperature is used to control the ON/OFF of the heat pump.

When ROOM TEMP. is enabled, the target water flow temperature will be calculated from climate-related curves.

How to enter the TEMP. TYPE SETTING

Go to ☐ > FOR SERVICEMAN> 5.TEMP. TYPE SETTING. Press ☐. The following page will be displayed:

5 TEMP. TYPE SETTING
5.1 WATER FLOW TEMP.	YES
5.2 ROOM TEMP.	NON
5.3 DOUBLE ZONE	NON
ADJUST

If you only set WATER FLOW TEMP. to YES, or only set ROOM TEMP. to YES, The following pages will be displayed.

01-01-2018	23:59	13°
	ON
35°C		38°C

only WATER FLOW TEMP. YES

01-01-2018	23:59	13°
	ON
25.0°C		38

only ROOM TEMP. YES

If you set WATER FLOW TEMP. and ROOM TEMP. to YES, meanwhile set DOUBLE ZONE to NON or YES, the following pages will be displayed.

01-01-2018	23:59	13°	01-01-2018	23:59	13°
35°C	ON		2	ON
		38°C	25.0°C

Homepage (zone 1)
Addition page (zone 2)
(Double zone is effective)

In this case, the setting value of zone 1 is T1S, the setting value of zone 2 is T1S2(The corresponding TIS2 is calculated according to the climate related curves.)

If you set DOUBLE ZONE to YES and set ROOM TEMP. to NON, meanwhile set WATER FLOW TEMP. to YES or NON, the following pages will be displayed.

01-01-2018	23:59	13°	01-01-2018	23:59	13°
35 °C	ON		38 °C	2	ON
		38 °C		35 °C

Homepage (zone 1)
Addition page (zone 2)

In this case, the setting value of zone 1 is T1S, the setting value of zone 2 is T1S2.

If you set DOUBLE ZONE and ROOM TEMP. to YES, meanwhile set WATER FLOW TEMP. to YES or NON, the following page will be displayed.

01-01-2018	23:59	13°	01-01-2018	23:59	13°
35°C	ON	38°C	25.0°C	ON

Homepage (zone 1)

Addition page (zone 2)

(Double zone is effective)

In this case, the setting value of zone 1 is T1S, the setting value of zone 2 is T1S2 (The corresponding T1S2 is calculated according to the climate related curves.)

10.5.6 ROOM THERMOSTAT

About ROOM THERMOSTAT

The ROOM THERMOSTAT is used to set whether the room thermostat is available.

How to set the ROOM THERMOSTAT

Go to ☐ >FOR SERVICEMAN> 6.ROOM

THERMOSTAT. Press ←. The following page will be displayed:

NOTE

ROOM THERMOSTAT = NON, no room thermostat.

ROOM THERMOSTAT = MODE SET, the wiring of room thermostat should follow method A.

ROOM THERMOSTAT=ONE ZONE, the wiring of room thermostat should follow method B.

ROOM THERMOSTAT=DOUBLE ZONE, the wiring of room thermostat should follow method C (refer to 9.7.6 "Connection for other components/For room thermostat")

10.5.7 Other HEATING SOURCE

The OTHER HEATING SOURCE is used to set the parameters of the backup heater, additional heating sources and solar energy kit.

Go to ☐ > FOR SERVICEMAN> 7. OTHER HEATING SOURCE, Press ←. The following page will be dispayed:

7 OTHER HEATING SOURCE	1/2
7.1 dT1_IBH_ON	5°C
7.2 t_IBH_DELAY	30MIN
7.3 T4_IBH_ON	-5°C
7.4 dT1_AHS_ON	5°C
7.5 t_AHS_DELAY	30MIN
ADJUST

7 OTHER HEATING SOURCE 2/2
7.6 T4_AHS_ON	-5°C
7.7 IBH LOCATE	PIPE LOOP
7.8 P_IBH1	0.0kW
7.9 P_IBH2	0.0kW
7.10 P_TBH	2.0kW
ADJUST

10.5.8 HOLIDAY AWAY SETTING

The HOLIDAY AWAY SETTING is used to set the outlet water temperature to prevent freezing when away for holiday.

Go to ☐ > FOR SERVICEMAN> 8.HOLIDAY AWAY SETTING. Press ←. The following page will be displayed:

10.5.9 SERVICE CALL SETTING

The installers can set the phone number of the local dealer in SERVICE CALL SETTING. If the unit doesn't work properly, call this number for help.

Go to ☐> FOR SERVICEMAN>SERVICE CALL.

Press ←. The following page will be displayed:

Press ▼ ▲ to scroll and set the phone number. The maximum length of the phone number is 13 digits, if the length of phone number is short than 12, please input ■, as shown below:

The number displayed on the user interface is the phone number of your local dealer.

10.5.10 RESTORE FACTORY SETTINGS

The RESTORE FACTORY SETTING is used to restore all the parameters set in the user interface to the factory setting.

Go to > FOR SERVICE MAN > 10.RESTORE FACTORY SETTINGS. Press ←. The following page will be displayed:

Press ◀▶ to scroll the cursor to YES and press ←. The following page will be displayed:

After a few seconds, all the parameters set in the user interface will be restored to factory settings.

10.5.11 TEST RUN

TEST RUN is used to check correct operation of the valves, air purge, circulation pump operation, cooling, heating and domestic water heating.

Go to ☐ > FOR SERVICEMAN> 11.TEST RUN. Press ↓. The following page will be displayed:

If YES is selected, the following pages will be displayed:

If POINT CHECK is selected, the following pages will be displayed:

Press ▼ ▲ to scroll to the components you want to check and press ⏻. For example, when 3-way valve is selected and ⏻ is pressed, if the 3-way valve is open/close, then the operation of 3-way valve is normal, and so are other components.

CAUTION

Before the point check, make sure the tank and the water system is filled with water, and air is expelled, or it may cause the pump or backup heater burn out.

If you select AIR PURGE and ↓ is pressed, the following page will be displayed :

When in air purge mode, SV1 will open, SV2 will close. 60s later the pump in the unit (PUMPI) will operate for 10min during which the flow switch will not work. After the pump stops, the SV1 will close and the SV2 will open. 60s later both the PUMPI and PUMPO will operate until the next command is received.

When CIRCULATION PUMP RUNNING is selected, the following page will be displayed:

When circulation pump running is turned on, all running components will stop. 60 seconds later, the SV1 will open, the SV2 will close, 60 seconds later PUMPI will operate. 30s later, if the flow switch checked normal flow, PUMPI will operate for 3min, after the pump stops 60 seconds, the SV1 will close and the SV2 will open. 60s later the both PUMPI and PUMPO will operate, 2 mins later, the flow switch will check the water flow. If the flow switch closes for 15s, PUMPI and PUMPO will operate until the next command is received.

When the COOL MODE RUNNING is selected, the following page will be displayed:

11 TEST RUN

Test run is on. Cool mode is on. Leaving water temperature is 15℃.

CONFIRM

During COOL MODE test running, the default target outlet water temperature is 7^ C. The unit will operate until the water temperature drops to a certain value or the next command is received.

When the HEAT MODE RUNNING is selected, the following page will be displayed:

11 TEST RUN

Test run is on. Heat mode is on. Leaving water temperature is 15℃.

CONFIRM

During HEAT MODE test running, the default target outlet water temperature is 35^ C. The IBH (internal backup heater) will turn on after the compressor runs for 10 min. After the IBH runs for 3 minutes, the IBH will turn off, the heat pump will operate until the water temperature increase to a certain value or the next command is received.

When the DHW MODE RUNNING is selected, the following page will be displayed:

11 TEST RUN

Test run is on. DHW mode is on. Water flow temper. is 45°C Water tank temper. is 30°C

CONFIRM

During DHW MODE test running, the default target temperature of the domestic water is 55^ C. The TBH(tank boost heater) will turn on after the compressor runs for 10min. The TBH will turn off 3 minutes later, the heat pump will operate until the water temperature increase to a certain value or the next command is received.

During test run, all buttons except are invalid. If you want to turn off the test run, please press . For example, when the unit is in air purge mode, after you press , the following page will be displayed:

Press ◀▶ to scroll the cursor to YES and press _. The test run will turn off.

10.5.12 SPECIAL FUNCTION

When it is in special function modes, the wired controller can not operate, the page do not return to the homepage, and the screen showed the page that special function runs, the wired controller do not locked.

NOTE During special function operating other functions ( WEEKLY SCHEDULE/TIMER , HOLIDAY AWAY, HOLIDAY HOME) can't be used.

Go to > FOR SERVICE MAN> FUNCTION.

Before floor heating, if a large amount of water remains on the floor, the floor may be warped or even rupture during floor heating operation, in order to protect the floor, floor drying is necessary, during which the temperature of the floor should be increased gradually.

Press ▼ ▲ to scroll and press ← to enter.

During first operation of the unit, air may remain in the water system which can cause malfunctions during operation. It is necessary to run the air purge function to release the air (make sure the air purge valve is open).

If PREHEATING FOR FLOOR is selected, after press _, the following page will be displayed:

When the cursor is on OPERATE PREHEATING FOR FLOOR, Use ◀▶ to scroll to YES and press. The following page will be displayed:

2.SPECTuring preheating for floor, all the buttons except are invalid. If you want to turn off the preheating for floor, please press .

The following page will be displayed:

Use ◀▶ to scroll the cursor to YES and press, the preheating for floor will turn off.

The operation of the unit during preheating for floor described in the picture below:

If FLOOR DRYING UP is selected, after pressing ☐, the following pages will be displayed:

During floor drying, all the buttons except □ are invalid. When the heat pump malfunctions, the floor drying mode will turn off when the backup heater and additional heating source is unavailable. If you want to turn off floor drying up, please press □. The following page will be displayed:

Use ◀▶ to scroll the cursor to YES and press ↕ Floor drying will turn off.

The target outlet water temperature during floor drying up described in the picture below:

10.5.13 AUTO RESTART

The AUTO RESTART function is used to select whether the unit reapplies the user interface settings at the time when power returns after a power supply failure.

Go to ☐ > FOR SERVICEMAN>13.AUTO RESTART

The AUTO RESTART function reapplies the user interface settings at the time of the power supply failure. If this function is disabled, when power returns after a power supply failure, the unit won't auto restart.

10.5.14 POWER INPUT LIMITATION

How to set the POWER INPUT LIMITATION

Go to ☐ > FOR SERVICEMAN>

1. POWER INPUT LIMITATION

10.5.15 INPUT DEFINE

How to set the INPUT DEFINE

Go to ☐ > FOR SERVICEMAN> 15. INPUT DEFINE

15 INPUT DEFINE
15.1 M1M2	REMOTE
15.2 SMART GRID	NON
15.3 Tw2	NON
15.4 Tbt1	NON
15.5 Tbt2	NON
ADJUST

15 INPUT DEFINE
15.6 Ta	HMI
15.7 Ta-adj	-2°C
15.8 SOLAR INPUT	NON
15.9 F-PIPE LENGTH	<10m
15.10 RT/Ta PCB	NON
ADJUST

15 INPUT DEFINE
15.11 PUMP_I SILENT MODE	NON
15.12 DFT1/DFT2 DEFROST
ADJUST

10.5.16 CASCADE SET

How to set the CASCADE SET

Go to ☐ > FOR SERVICEMAN>16.CASCADE SET.

16 CASCADE SET
16.1 PER START	10%
16.2 TIME_ADJUST	5 MIN
16.3 ADDRESS RESET	0

10.5.17 HMI ADDRESS SET

How to set the HMI ADDRESS SET

Go to ☐ >FOR SERVICEMAN>16.HMI ADDRESS SET.

17 HMI ADDRESS SET
17.1 HMI SET	MASTER
17.2 HMI ADDRESS FOR BMS	1
17.3 STOP BIT 1

10.5.18 Setting parameters

The parameters related to this chapter are shown in the table below.

Order number	Code State Default Minimum	um Maximum				Setting interval	Unit
1.1 DHW	MODE Enable or disable the DHW mode:0=NON,1=YES 1 0 1 1 /
1.2 DISINFECT Enable or disable the disinfect mode:0=NON,1=YES 1 0 1 1 /
1.3	DHW PRIORITY	Enable or disable the DHW priority mode:0=NON,1=YES	1	0	1	1	/
1.4	PUMP_D	Enable or disable the DHW pump mode:0=NON,1=YES	0	0	1	1	/
1.5	DHW PRIORITY TIME SET	Enable or disable the DHW priority time set:0=NON,1=YES	0	0	1	1	/
1.6 dT5_ON	The tempe rature difference for starting the heat pump		10	1	30	1	°C
1.7	dT1S5	The difference value between Twout and T5 in DHW mode	10	5	40	1	°C
1.8 T4DHWMAX		The maximum ambient temperature that the heat pump can operate at f or domestic water heating	43	35	43	1	°C
1.9 T4DHWMIN		The minimum ambient temperature that the heat pump can operate f or domestic water heating	-10	-25	30	1	°C
1.10	t_INTERVAL_DHW	the start time interval of the compressor in DHW mode.	5	5	5	1	MIN
1.11	dT5_TBH_OFF	the temperature difference between T5 and T5S that turns the booster heater off.	5	0	10	1	°C
1.12	T4_TBH_ON	the highest outdoor temperature the TBH can operate.	5	-5	50	1	°C
1.13	t_TBH_DELAY	the time that the compressor has run before starting the booster heater	30	0	240	5	MIN
1.14	T5S_DISINFECT	the target temperature of water in the domestic hot water tank in the DISINFECT function.	65	60	70	1	°C
1.15	t_DI_HIGHTEMP.	the time that the highest temperature of water in the domestic hot water tank in the DISINFECT function will last	15	5 60	5	MIN
1.16	t_DI_MAX	the maximum time that disinfection will last	210	90	300	5	MIN
1.17	t_DHWHP_RESTRICT	he operation time for the space heating/cooling operation.	30	10	600	5	MIN
1.18	t_DHWHP_MAX	the maximum continuous working period of the heat pump in DHW PRIORITY mode.	90	10	600	5	MIN
1.19	PUMP_D TIMER	Enable or disable the DHW pump run as timed and keeps running for PUMP RUNNING TIME:0=NON,1=YES	1	0	1	1	/
1.20	PUMP_D RUNNING TIME	the certain time that the DHW pump will keep running for	5	5	120	1	MIN
1.21	PUMP_D DISINFECT RUN	Enable or disable the DHW pump operate when the unit is in disinfect mode and T& T5S_DI-2:0=NON,1=YES	1	0	1	1	/
2.1	COOL MODE	Enable or disable the cooling mode:0=NON,1=YES	1	0	1	1	/
2.2 t_T4_FRESH_C		The refresh time of climate related curves for cooling mode	0.5	0.5	6	0.5 hours
2.3 T4CMAX		The highest ambient operation temperature for cooling mode	52	35	52	1	°C
2.4 T4CMIN		the lowest ambient operating temperature for cooling mode	10	-5	25	1	°C
2.5	dT1SC	the temperature difference for starting the heat pump(T1)	5	2	10	1	°C
2.6	dTSC	the temperature difference for starting the heat pump(Ta)	2	1	10	1	°C
2.7	t_INTERVAL_COOL	the start time interval of the compressor in COOL mode	5	5	5	1	°C
2.8 T1SeC1		The setting temperature 1 of climate related curves f or cooling mode.	10	5 25	1	MIN
2.9 T1SeC2		The setting temperature 2 of climate related curves f or cooling mode.	16	5	25	1	°C
2.10	T4C1	The ambient temperature 1 of climate related curves f or cooling mode.	35	-5	46	1	°C
2.11	T4C2	The ambient temperature 2 of climate related curves f or cooling mode.	25	-5	46	1	°C
2.12	ZONE1 C-EMISSION	The type of zone1 end for cooling mode 0=FCU(fan coil unit), 1=RAD.(radiator). 2=FLH(floor heating)	0	0	2	1	/
2.13	ZONE2 C-EMISSION	The type of zone2 end for cooling mode 0=FCU(fan coil unit), 1=RAD.(radiator). 2=FLH(floor heating)	0	0	2	1	/
3.1 HEAT		MODE Enable or disable the heating mode 1011/
3.2 t_T4		FRESH_H	The refresh time of climate related curves for heating mode	0.5 0.5 6	0.5 hours
3.3 T4HMAX		The maximum ambient operating temperature for heating mode	25 20 35	1	°C
3.4 T4HMIN		The minimum ambient operating temperature for heating mode	-15	-25	30	1
3.5		dT1SH	The temperature difference for starting the unit (T1)	5	2	20	1
3.6		dTSH	The temperature difference f or starting the unit (Ta)	2110
3.7		t_INTERVAL_HEAT	the start time interval of the compressor in HEAT mode	5	5	5	1
3.8 T1SeH1		The setting temperature 1 of climaterelated curves for heating mode	35 25 65	1	°C
3.9 T1SeH2		The setting temperature 2 of climate related curves f or heating mode	28 25 65	1	°C
3.10		T4H1	The ambient temperature 1 of climate related curves f or heating mode	-5 -25	35	°C
3.11		T4H2	The ambient temperature 2 of climate related curves f or heating mode	7	-25	35	1
3.12		ZONE1 H-EMISSION	The type of zone1 end for heating mode: 0=FCU(fan coil unit), 1=RAD.(radiator), 2=FLH(floor heating)	1	0	2	1
3.13		ZONE2 H-EMISSION	The type of zone2 end for heating mode: 0=FCU(fan coil unit), 1=RAD.(radiator), 2=FLH(floor heating)	2	0	2	1
3.14		L_DELAY_PUMP	The delay time for water pump to stop after the compressor stops	2	0.5	20	0.5
4.1 T4AUTOCMIN		The minimum operating ambient temperature for cooling in auto mode	25 20 29	1	°C
4.2 T4AUTOHMAX		The maximum operating ambient temperature for heating in auto mode	17 10 17	1	°C
5.1		WATER FLOW TEMP.	Enable or disable the WATER FLOW TEMP.:0=NON,1=YES	1	0	1	1
5.2		ROOM TEMP.	Enable or disable the ROOM TEMP.:0=NON,1=YES	0	0	1	1
5.3 DOUBLE ZONE		Enable or disable the ROOM THERMOSTAT DOUBLE ZONE:0=NON,1=YES	0	0	1	1
6.1		ROOM THERMOSTAT	The style of room thermostat 0=NON,1=MODE SET,2=ONE ZONE,3=DOUBLE ZONE	0	0	3	1
7.1 dT1_BH_ON		The temperature difference between T1S and T1 for starting the backup heater.	5	2	10	1
7.2 L_BH_DELAY		The time that the compressor has run before the first backup heater turns on	30 15	120 5	MIN
7.3 T4_BH_ON The ambient temperature for starting the backup heate r			-5	-15	30	1
7.4 dT1_AHS_ON		The temperature difference between T1S and T1 for turning the additional heating source on	5	2	20	1
7.5 L_AHS_DELAY		The time that the compressor has run before starting the additional heating source	30 5 120	5	MIN
7.6 T4_AHS_ON		The ambient temperature for starting the additional heating source	-5 -15	30 1	°C
7.7 IBH_LOCATE		IBH/AHS installation location PIPE LOOP=0; BUFFER TANK=1	0	0	0	0
7.8		P_BH1	Power input of IBH1	0	0	20	0.5
7.9		P_BH2	Power input of IBH2	0	0	20	0.5
7.10		P_TBH	Power input of TBH	2	0	20	0.5
8.1 T1S_H.A_H		The target outlet water temperature for space heating when in holiday away mode	25 20 29	1	°C
8.2 T5S_H.A_DHW		The target outlet water temperature for domestic hot water heating when in holiday away mode	25 20 29	1	°C
12.1		PREHEATING FOR FLOOR T1S	The setting temperature of outlet water during first preheating for floor	25 25 35	1	°C
12.3		t_FIRSTFH	The time last for preheating floor	72	48	96	12
12.4 t_DRYUP The day for w arming		up during floor drying up 8 4 15 1 DAY
12.5 t_HIGHPEAK		The continue days in high temperature during floor drying up	5	3		7
12.6 t_DRYD		The day of dropping temperature during f loor drying up	5	4	1	5	1
12.7 T_DRYPEAK		The target peak temperature of w ater flow during floor drying up	45	30	55 1 °C
12.8 START TIME The start time of		floor drying up	Hour: the present time(not on the hour +1, on the hour +2)Minute:00	0:00	23:30	1/30	h/min
12.9 START DATE The start date of f loor drying up			The present date	1/1/2000	31/12/2099	1/1/2001	d/m/y
13.1	AUTO RESTART COOLHEAT MODE	Enable or disable the auto restart cooling/heating mode. 0=NON,1=YES	1	0	1		1
13.2	AUTO RESTART DHW MODE	Enable or disable the auto restart DHW mode. 0=NON,1=YES	1	0	1		1
14.1	POWER INPUT LIMITATION	The type of power input limitation, 0=NON, 1~8=TYPE 1~8	0	0	8		1
15.1	M1 M2	Define the function of the M1M2 sw itch; 0=REMOTE ON/OFF,1= TBH ON/OFF,2=AHS ON/OFF	0	0		2
15.2 SMART GRID		Enable or disable the SMART GRID; 0=NON,1=YES	0	0	1		1
15.3	Tw 2	Enable or disable the T1b(Tw 2); 0=NON,1=YES	0	0	1		1
15.4 Tbt1		Enable or disable the Tbt1; 0=NON,1=YES	0	0	1		1
15.5 Tbt2		Enable or disable the Tbt2; 0=NON,1=YES	0	0	1		1
15.6 Ta		Enable or disable the Ta; 0=NON,1=YES	0	0	1		1
15.7	Ta-adj	The corrected value of Ta on wired controller	-2	-10 10	1		°C
15.8	SOLAR INPUT	Choose the SOLAR INPUT; 0=NON,1=CN18Tsolar,2=CN11SL1SL2	0	0	2		1
15.9	F-PIPE LENGTH	Choose the total length of the liquid pipe(F-PIPE LENGTH); 0=F-PIPE LENGTH < 10m,1=F-PIPE LENGTH≥ 10m	0	0	1		1
15.10	RT/Ta PCB	Enable or disable the RT/Ta PCB0=NON,1=YES	0	0	1		1 /
15.11	PUMP_I SILENT MODE	Enable or disable PUMPI SILENT MODE 0=NON, 1=YES	0	0	1		1
15.12	DFT1/DFT2	DFT1/DFT2 port function:0=DEFROST 1=ALARM	0	0	1	1	/
16.1	PER_START	Start-up percentage of multiple units	10	10	100	10	%
16.2 TIME_ADJUST		Adjustment time of adding and subtracting units	5	1	60	1	MIN
16.3	ADDRESS RESET	Reset the address code of the unit	FF	0	15	1	/
17.1	HMI SET	Choose the HMI; 0=MASTER, 1=SLAVE	0	0	1		1
17.2	HMI ADDRESS FOR BMS	Set the HMI address code for BMS	1	1	16	1	/
17.3	STOP BIT	HMI stop bit	1	1	2	1	/

NOTE

15.12 DFT1/DFT2 ALARM function can be valid only with IDU software version higher than V99.

11 TEST RUN AND FINAL CHECKS

The installer is obliged to verify correct operation of unit after installation.

11.1 Final checks

Before switching on the unit, read following recommendations:

• When the complete installation and all necessary settings have been carried out, close all front panels of the unit and refit the unit cover.
• The service panel of the switch box may only be opened by a licensed electrician for maintenance purposes.

NOTE

That during the first running period of the unit, required power input may be higher than stated on the nameplate of the unit. This phenomenon originates from the compressor that needs elapse of a 50 hours run in period before reaching smooth operation and stable power consumption.

11.2 Test run operation (manually)

If required, the installer can perform a manual test run operation at any time to check correct operation of air purge, heating, cooling and domestic water heating, refer to 10.5.11 "Test run".

12 MAINTENANCE AND SERVICE

In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals.

This maintenance needs to be carried out by your local technician.

DANGER

ELECTRIC SHOCK

• Before carrying out any maintenance or repairing activity, must switch off the power supply on the supply panel.
• Do not touch any live part for 10 minutes after the power supply is turned off.
• The crank heater of compressor may operate even in standby.
• Please note that some sections of the electric component box are hot.
• Forbid touch any conductive parts.
• Forbid rinse the unit. It may cause electric shock or fire.
• Do not leave the unit unattended when service panel is removed.

The following checks must be performed at least once a year by qualified person.

- Water pressure Check the water pressure, if it is below 1 bar, fill water to the system.

• Water filter Clean the water filter.

- Water pressure relief valve Check for correct operation of the pressure relief valve by turning the black knob on the valve counter-clockWise:

-If you do not hear a clacking sound, contact your local dealer.

-In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.

- Pressure relief valve hose Check that the pressure relief valve hose is positioned appropriately to drain the water.

- Backup heater vessel insulation cover Check that the backup heater insulation cover is fastened tightly around the backup heater vessel.

- Domestic hot water tank pressure relief valve (field supply) Applies only to installations with a domestic hot water tank. Check for correct operation of the pressure relief valve on the domestic hot water tank.

- Domestic hot water tank booster heater Applies only to installations with a domestic hot water tank. It is advisable to remove lime buildup on the booster heater to extend its life span, especially in regions with hard water. To do so, drain the domestic hot water tank, remove the booster heater from the domestic hot water tank and immerse in a bucket (or similar) with lime-removing product for 24 hours.

- Unit switch box -Carry out a thorough visual inspection of the switch box and look for obvious defects such as loose connections or defective wiring.

-Check for correct operation of contactors with an ohm meter. All contacts of these contactors must be in open position.

- Use of glycol (Refer to 9.4.4 "Water circuit anti-freeze protection") Document the glycol concentration and the pH-value in the system at least once a year.

-A PH-value below 8.0 indicates that a significant portion of the inhibitor has been depleted and that more inhibitor needs to be added.

- -When the PH-value is below 7.0 then oxidation of the glycol can occur, the system should be drained and flushed thoroughly before severe damage occurs.

Make sure that the disposal of the glycol solution is done in accordance with relevant local laws and regulations.

13 TROUBLE SHOOTING

This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit.

This troubleshooting and related corrective actions may only be carried out by your local technician.

13.1 General guidelines

Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.

WARNING

When carrying out an inspection on the switch box of the unit, always make sure that the main switch of the unit is switched off.

When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. Under no circumstances can safety devices be bridged or changed to a valve other than the factory setting. If the cause of the problem cannot be found, call your local dealer.

If the pressure relief valve is not working correctly and is to be replaced, always reconnect the flexible hose attached to the pressure relief valve to avoid water dripping out of the unit!

NOTE

For problems related to the optional solar kit for domestic water heating, refer to the troubleshooting in the Installation and owner's manual for that kit.

13.2 General symptoms

Symptom 1: The unit is turned on but the unit is not heating or cooling as expected

POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting is not correct.	Check the parameters.T4HMAX,T4HMIN in heat mode.T4CMAX,T4CMIN in cool mode.T4DHWMAX,T4DHWMIN in DHW mode.
The water flow is too low.	Check that all shut off valves of the water circuit are in the right position.Check if the water filter is plugged.Make sure there is no air in the water system.Check the water pressure.The water pressure must be>1 bar (water is cold).Make sure that the expansion vessel is not broken.Check that the resistance in the water circuit is not too high for the pump.
The water volume in the installation is too low.	Make sure that the water volume in the installation is above the minimum required value (refer to "9.4.2 Water volume and sizing expansion vessels").

Symptom 2: The unit is turned on but the compressor is not starting (space heating or domestic water heating)

POSSIBLE CAUSES CORRECTIVE ACTION
The unit maybe operate out of its operation range (the water temperature is too low).	In case of low water temperature, the system utilizes the backup heater to reach the minimum water temperature first ( 12^ ).Check that the backup heater power supply is correct.Check that the backup heater thermal fuse is closed.Check that the backup heater thermal protector is not activated.Check that the backup heater contactors are not broken.

Symptom 3: Pump is making noise (cavitation)

POSSIBLE CAUSES CORRECT VE ACTION
There is air in the system. Purge air.
Water pressure at pump inlet is too low.	Check the water pressure.The water pressure must be > 1 bar (water is cold).Check that the expansion vessel is not broken.Check that the setting of the pre- pressure of the expansion vessel is correct (refer to "9.4.2 Water volume and sizing expansion vessels").

Symptom 4: The water pressure relief valve opens

POSSIBLE CAUSES CORRECTIVE ACTION
The expansion vessel is broken. Replace the expansion vessel.
The filling water pressure in the installation is higher than 0.3MPa.	Make sure that the filling water pressure in the installation is about 0.10~0.20MPa (refer to "9.4.2 Water volume and sizing expansion vessels").

Symptom 5: The water pressure relief valve leaks

POSSIBLE CAUSES CORRECTIVE ACTION
Dirt is blocking the water pressure relief valve outlet.	Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockWise:If you do not hear a clacking sound, contact your local dealer.In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.

Symptom 6: Space heating capacity shortage at low outdoor temperatures

POSSIBLE CAUSES CORRECTIVE ACTION
Backup heater operation is not activated.	Check that the "OTHER HEATING SOURCE/ BACKUP HEATER"is enabled, see "10.5 Field settings" Check whether or not the thermal protector of the backup heater has been activated (refer to "Controls parts for backup heater(IBH)". Check if booster heater is running, the backup heater and booster heater can't operate simultaneously.
Too much heat pump capacity is used for heating domestic hot water (applies only to installations with a domestic hot water tank).	Check that the "t_DHWHP_MAX" and "t_DHWHP_RESTRICT" are configured appropriately:Make sure that the "DHW PRIORITY" in the user interface is disabled.Enable the "T4_TBH_ON" in the user interface/FOR SERVICEMAN to activate the booster heater for domestic water heating.

Symptom 7: Heat mode can't change to DHW mode immediately

POSSIBLE CAUSES CORRECTIVE ACTION
Volume of tank is too small and the location of water temperature probe not high enough	Set "dT1S5" to maximum value, and set "t_DHWHP_RESTRICT" to minimum value.Set dT1SH to 2°C.Enable TBH, and TBH should be controlled by the outdoor unit.If AHS is available, turn on first, if requirement for turn heat pump on is fulfilled, the heat pump will turn on.If both TBH and AHS are not available, try to change the position of T5 probe(refer to 2 "General introduction").

Symptom 8: DHW mode can't change to Heat mode immediately

POSSIBLE CAUSES CORRECTIVE ACTION
Heat exchanger for space heating not big enough	Set "t_DHWHP_MAX" to minimum value, the suggested value is 60min.If circulating pump out of unit is not controlled by unit, try to connect it to the unit.Add 3-way valve at the inlet of fan coil to ensure enough water flow.
Space heating load is small	Normal, no need for heating
Disinfect function is enabled but without TBH	Disable disinfect functionadd TBH or AHS for DHW mode
Manual turn on the FAST WATER function, after the hot water meets the requirements, the heat pump fails to switch to the air-conditioning mode in time when the air conditioner is in demand	Manual turn off the FAST WATER function
When the ambient temperature is low, the hot water is not enough and the AHS is not operated or operated late	Set "T4DHWMIN", the suggested value is ≥ -5°CSet "T4_TBH_ON", the suggested value is ≥ 5°C
DHW mode priority	If there is AHS or IBH connect to the unit, when the outdoor unit failed, the hydraulic module board must run DHW mode till the water temperature reach the setting temperature before change to heating mode.

Symptom 9: DHW mode heat pump stop work but setpoint not reached, space heating require heat but unit stay in DHW mode

POSSIBLE CAUSES	CORRECTIVE ACTION
Surface of coil in the tank not large enough	The same solution for Symptom 7
TBH or AHS not available	Heat pump will stay in DHW mode until "t_DHWHP_MAX" reached or setpoint is reached. Add TBH or AHS for DHW mode,TBH and AHS should be controlled by the unit.

13.3 Operation parameter

This menu is for installer or service engineer reviewing the operation parameters.

• At home page, go to " ← " >" OPERATION PARAMETER".
• Press " ☐". There are nine pages for the operating parameter as following. Press "▼"、"▲" to scroll.
• Press"▶" and "◀" to check slave units' operation parameter in cascade system. The address code in the upper right corner will change from "#00" to "#01"、"#02" etc. accordingly

OPERATION PARAMETER	#00
ONLINE UNITS NUMBER	1
OPERATE MODE	COOL
SV1 STATE	ON
SV2 STATE	OFF
SV3 STATE	OFF
PUMP_I	ON
ADDRESS	1/9

OPERATION PARAMETER		#00
PUMP-O	OFF
PUMP-C	OFF
PUMP-S	OFF
PUMP-D	OFF
PIPE BACKUP HEATER		OFF
TANK BACKUP HEATER		ON
ADDRESS		2/9

OPERATION PARAMETER	#00
GAS BOILER	OFF
T1 LEAVING WATER TEMP.	35°C
WATER FLOW	1.72m3/h
HEAT PUMP CAPACTIY	11.52kW
POWER CONSUM.	1000kWh
Ta ROOM TEMP	25°C
ADDRESS	3/9

OPERATION PARAMETER	#00
T5 WATER TANK TEMP.	53°C
Tw2 CIRCUIT2 WATER TEMP.	35°C
TIS' C1 CLI. CURVE TEMP.	35°C
TIS2' C2 CLI. CURVE TEMP.	35°C
TW_O PLATE W-OUTLET TEMP.	35°C
TW_I PLATE W-OUTLET TEMP.	30°C
ADDRESS	4/9

OPERATION PARAMETER	#00
Tbt1 BUFFERTANK_UP TEMP.	35°C
Tbt2 BUFFERTANK_LOW TEMP.	35°C
Tsolar	25°C
IDU SOFTWARE	01-09-2019V01
ADDRESS	5/9

OPERATION PARAMETER	#00
ODU MODEL	6kW
COMP.CURRENT	12A
COMP.FREQENCY	24Hz
COMP.RUN TIME	54 MIN
COMP.TOTAL RUN TIME	1000Hrs
EXPANSION VALVE	200P
ADDRESS	6/9
FAN SPEED	600R/MIN
IDU TARGET FREQUENCY	46Hz
FREQUENCY LIMITED TYPE	5
SUPPLY VOLTAGE	230V
DC GENERATRIX VOLTAGE	420V
DC GENERATRIX CURRENT	18A
ADDRESS	7/9

OPERATION PARAMETER	#00
TW_O PLATE W-OUTLET TEMP.	35°C
TW_I PLATE W-INLET TEMP.	30°C
T2 PLATE F-OUT TEMP.	35°C
T2B PLATE F-IN TEMP.	35°C
Th COMP. SUCTION TEMP.	5°C
Tp COMP. DISCHARGE TEMP.	75°C
ADDRESS	8/9

OPERATION PARAMETER	#00
T3 OUTDOOR EXCHARGE TEMP.	5°C
T4 OUTDOOR AIR TEMP.	5°C
TF MODULE TEMP.	55°C
P1 COMP. PRESSURE	2300kPa
ODU SOFTWARE	01-09-2018V01
HMI SOFTWARE	01-09-2018V01
ADDRESS	9/9

NOTE

The power consumption parameter is optional. If some parameter is not be activated in the system, the parameter will show "--".

The heat pump capacity is for reference only, not used to judge the ability of the unit. The accuracy of sensor is ± 1^ . The flow rates parameters are calculated according to the pump running parameters, the deviation is different at different flow rates, the maximum of deviation is 15% . The flow parameters are calculated according to the electrical parameters of the pump operation.

The operating voltage is different and the deviation is different.

The display value is 0 when the voltage is less than 198V.

13.4 Error codes

When a safety device is activated, an error code(which does't include external failure) will be displayed on the user interface.

A list of all errors and corrective actions can be found in the table below.

Reset the safety by turning the unit OFF and back ON.

In case this procedure for resetting the safety is not successful, contact your local dealer.

ERROR CODE	MALFUNCTION OR PROTECTION	FAILURE CAUSE AND CORRECTIVE ACTION
E0	Water flow falut(after 3 times E8)	1.The wire circuit is short connected or open. Reconnect the wire correctly.2. Water flow rate is too low.3. Water flow switch is failed, switch is open or close continuously, change the water flow switch.
E2	Communication fault between controller and hydraulic module	1.Wire doesn't connect between wired controller and unit. connect the wire.2.Communication wire sequence is not right. Reconnect the wire in the right sequence.3.Check whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc..4. To add a barrier to protect the unit or to move the unit to the other place.
E3	Final outlet water temp.sensor(T1) fault	1.Check the resistance of the sensor2.The T1 sensor connector is loosen. Reconnect it.3.The T1 sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive.4.The T1 sensor failure, change a new sensor.
E4	water tank temp.sensor (T5) fault	1.Check the resistance of the sensor2.The T5 sensor connector is loosen. Reconnect it.3.The T5 sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive4.The T5 sensor failure, change a new sensor.5. If you want to close the domestic water heating when T5 sensor do not connected to the system, then T5 sensor can not be detected, refer to 10.5.1 "DHW MODE SETTING"
E7	Buffer tank up temp.sensor(Tbt1) fault	1. Check the resistance of the sensor.2. The Tbt1 sensor connector is loosen,reconnect it.3. The Tbt1 sensor connector is wet or there is water in,remove the water ,make the connector dry.Add waterproof adhesive.4. The Tbt1 sensor failure,change a new sensor."
E8	Water flow failure	Check that all shut off valves of the water circuit are completely open.1. Check if the water filter needs cleaning.2. Refer to "9.5 Filing water"3. Make sure there is no air in the system(purge air).4. Check the water pressure. The water pressure must be >1 bar.5. Check that the pump speed setting is on the highest speed.6. Make sure that the expansion vessel is not broken.7. Check that the resistance in the water circuit is not too high for the pump (refer to "10.4 The circulation pump").8. If this error occurs at defrost operation (during space heating or domestic water heating), make sure that the backup heater power supply is wired correctly and that fuses are not blown.9. Check that the pump fuse and PCB fuse are not blown.
Eb	Solar temp.sensor(Tsolar) fault	1. Check the resistance of the sensor.2. The Tsolar sensor connector is loosen, reconnect it.3. The Tsolar sensor connector is wet or there is water in, remove the water ,make the connector dry.Add waterproof adhesive.4. The Tsolar sensor failure,change a new sensor.
Ec	Buffer tank low temp.sensor(Tbt2) fault	1.Check the resistance of the sensor.2.The Tbt2 sensor connector is loosen,reconnect it.3.The Tbt2 sensor connector is wet or there is water in,remove the water ,make the connector dry.Add waterproof adhesive.4.The Tbt2 sensor failure,change a new sensor."
Ed	Inlet water temp.sensor (Tw_in) malfunction	1.Check the resistance of the sensor2.The Tw_in sensor connector is loosen. Reconnect it.3.The Tw_in sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive4.The Tw_in sensor failure, change a new sensor.
EE	Hydraulic module EEprom failure	1. The EEprom parameter is error, rewrite the EEprom data.2. EEprom chip part is broken, change a new EEprom chip part.3. Main control board of hydraulic module is broken, change a new PCB.
HO	Communication fault between main board PCB B and main Control board of hydraulic module	1.Wire doesn't connect between main control board PCB B and main control board of hydraulic module. connect the wire.2.Communication wire sequence is not right. Reconnect the wire in the right sequence.3. Check whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc.. To add a barrier to protect the unit or to move the unit to the other place.
H2	Refrigerant liquid temp.sensor(T2) fault	1.Check the resistance of the sensor2.The T2 sensor connector is loosen. Reconnect it.3.The T2 sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive4. The T2 sensor failure, change a new sensor.
H3	Refrigerant gas temp.sensor(T2B) fault	1.Check the resistance of the sensor.2.The T2B sensor connector is loosen. Reconnect it.3.The T2B sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive4. The T2B sensor failure, change a new sensor.
HS	Room temp.sensor(Ta) fault	1.Check the resistance of the sensor.2. The Ta senor is in the interface.3. The Ta sensor failure, change a new sensor or change a new interface, or reset the Ta, connect a new Ta from the hydraulic module PCB.
H9	Outlet water for zone 2 temp.sensor (Tw2) fault	1.Check the resistance of the sensor.2. The Tw2 sensor connector is loosen. Reconnect it.3.The Tw2 sensor connector is wet or there is water in. Remove the water, make the connector dry. add waterproof adhesive.4. The Tw2 sensor failure, change a new sensor.
HA	Outlet water temp.sensor(Tw_out) fault	1. The TW_out sensor connector is loosen. Reconnect it.2.The TW_out sensor connector is wet or there is water in. remove the water, make the connector dry. add waterproof adhesive.3. The TW_out sensor failure, change a new sensor.
Hb	Three times "PP" protection and Tw_out< 7°C	The same to "PP".
Hd	Communication fault between hydraulic module parallel	1.The signal wires of slave units and master unit are not effectively connected. After checking all signal wires are well connected, and making sure there is no strong electricity or strong magnetic interference, power on again;2.There are two or more outdoor unit connected to the wired controller. After removing the excess wired controller and keep only the wired controller of the master unit, power on again;3.The power-on interval between the master unit and the slave unit is longer than 2min. After ensuring that the interval between the power-on of all the master units and slave units is less than 2min, power on again;4.The addresses of master unit and slave units are repeated: by pressing the SW2 button on main board once on slave units, the address code of the slave unit will be displayed on the digital tube (Normally address code, one of 1, 2, 3 ... 15 will be shown on main board), check whether there is a duplicate address. If there is a duplicate address code, after powering off the system,set the S4-1 to "ON"on master outdoor unit main board or the salve outdoor unit main board which display "Hd" error(refer to 10.2.1 FUNCTION SEETING).Power on again,all the units last for 5 minutes without "Hd" error, power off again and set the S4-1 to "OFF". The system will recover.
HE	Communication error between main board and thermostat transfer board	RT/Ta PCB is set to be valid on user interface but thermostat transfer board is not connected or the communication between thermostat transfer board and main board is not effectively connected. If thermostat transfer board is not needed, set the RT/Ta PCB to invalid. If thermostat transfer board is needed, please connect it to main board and make sure the communication wire is connected well and there is no strong electricity or strong magnetic interference.
PS	|Tw_out - Tw_in| value too big protection	1. Check that all shut off valves of the water circuit are completely open.2. Check if the water filter needs cleaning.3. Refer to "9.5 Filling water"4. Make sure there is no air in the system (purge air).5. Check the water pressure. The water pressure must be >1 bar(water is cold).6. Check that the pump speed setting is on the highest speed.7. Make sure that the expansion vessel is not broken.8. Check that the resistance in the water circuit is not too high for the pump. (refer to "10.4 The circulation pump").
Pb	Anti-freeze mode	Unit will return to the normal operation automatically.
PP	Tw_out - Tw_in unusual protection	1.Check the resistance of the two sensor.2.Check the two sensors locations.3.The water inlet/outlet sensor wire connector is loosen. Reconnect it.4.The water inlet/outlet (TW_in /TW_out) sensor is broken, Change a new sensor.5.Four-way valve is blocked. Restart the unit again to let the valve change the direction.6.Four-way valve is broken, change a new valve.

CAUTION

In winter, if the unit has E0 and Hb failure and the unit is not repaired in time, the water pump and pipeline system may be damaged by freezing, so E0 and Hb failure must be repaired in time.

ERROR CODE	MALFUNCTION OR PROTECTION	FAILURE CAUSE AND CORRECTIVE ACTION
E1	Phase loss or neutral wire and live wire are connected reversely(only for three phase unit)	1. Check whether the power supply cables are firmly connected, avoid phase loss.2. Check whether the sequence of neutral wire and live wire are connected reversely.
E5	The condenser outlet refrigerant temperature sensor (T3)error.	1. The T3 sensor connector is loosen. Reconnect it.2. The T3 sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive.3. The T3 sensor failure, change a new sensor.
E6	The ambient temperature sensor (T4) error.	1. The T4 sensor connector is loosen. Reconnect it.2. The T4 sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive.3. The T4 sensor failure, change a new sensor.
E9	Suction temperature sensor(Th) error	1. The Th sensor connector is loosen. Reconnect it.2. The Th sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive.3. The Th sensor failure, change a new sensor.
ER	Discharge temperature sensor(Tp) error	1. The Tp sensor connector is loosen. Reconnect it.2. The Tp sensor connector is wet or there is water in. remove the water, make the connector dry. Add waterproof adhesive3. The Tp sensor failure, change a new sensor.
HO	Communication fault between main board PCB B and main Control board of hydraulic module	1. Wire doesn't connect between main control board PCB B and main control board of hydraulic module. connect the wire.2. Communication wire sequence is not right. Reconnect the wire in the right sequence.3. Check whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc.. To add a barrier to protect the unit or to move the unit to the other place.
HI	Communication error between inverter module PCB A and main control board PCB B	1. Whether there is power connected to the PCB and driven board. Check the inverter module PCB indicator light is on or off. If Light is off, reconnect the power supply wire.2. If light is on, check the wire connection between inverter module PCB and main control board PCB, if the wire loosen or broken, reconnect the wire or change a new wire.3. Replace a new main PCB and driven board one by one.
HY	Three times (L0/L1) protect	The sum of the number of times L0 and L1 appear in an hour equals three.See L0 and L1 for fault handling methods
H6	The DC fan failure	1. Strong wind or typhoon below toward to the fan, to make the fan running in the opposite direction. Change the unit direction or make shelter to avoid typhoon below to the fan.2. Fan motor is broken, change a new fan motor.
H7	Voltage protection	1. Check whether the power supply input is in the available range.2. Power off and power on for several times rapidly in short time.Remain the unit power off for more than 3 minutes than power on.3. The circuit defect part of Main control board is defective.Replace a new Main PCB.
H8	Pressure sensor failure	1. Pressure sensor connector is loosen, reconnect it.2. Pressure sensor failure. change a new sensor.
HF	Inverter module board EE prom failure	1. The EEprom parameter is error, rewrite the EEprom data.2. EEprom chip part is broken, change a new EEprom chip part.3. Inverter module board is broken, change a new PCB.
HH	H6 displayed 10 times in 2 hours	Refer to H6
HP	Low pressure protection in cooling Pe<0.6 occurred 3 times in an hour	Refer to P0
P0	Low pressure switch protection	1. System is lack of refrigerant volume. Charge the refrigerant in right volume.2. When at heating mode or DHW mode, the outdoor heating exchanger is dirty or something is block on the surface. Clean the outdoor heating exchanger or remove the obstruction.3. The water flow is too low in cooling mode.increase the water flow.4. Electrical expansion valve locked or winding connector is loosen. Tap-tap the valve body and plug in/ plug off the connector for several times to make sure the valve is working correctly.
P1	High pressure switch protection	Heating mode, DHW mode:1. The water flow is low; water temp is high, whether there is air in the water system. Release the air.2. Water pressure is lower than 0.1Mpa, charge the water to let the pressure in the range of 0.15~0.2Mpa.3. Over charge the refrigerant volume. Recharge the refrigerant in right volume.4. Electrical expansion valve locked or winding connector is loosen. Tap-tap the valve body and plug in/ plug off the connector for several times to make sure the valve is working correctly. And install the winding in the right location DHW mode: Water tank heat exchanger is smaller .Cooling mode:1. Heat exchanger cover is not removed. Remove it.2. Heat exchanger is dirty or something is block on the surface. Clean the heat exchanger or remove the obstruction.
P3	Compressor overcurrent protection.	1.The same reason to P1.2. Power supply voltage of the unit is low, increase the power voltage to the required range.
P4	High discharge temperature protection.	1.The same reason to P1.2.TW_out temp.sensor is loosen Reconnect it..3. T1 temp.sensor is loosen. Reconnect it.4. T5 temp.sensor is loosen. Reconnect it.
Pd	High temperature protection of refrigerant outlet temp of condenser.	1. Heat exchanger cover is not removed. Remove it.2. Heat exchanger is dirty or something is block on the surface. Clean the heat exchanger or remove the obstruction.3. There is no enough space around the unit for heat exchanging.4. Fan motor is broken, replace a new one.
E7	Transducer module temperature too high protection	1. Power supply voltage of the unit is low, increase the power voltage to the required range.2. The space between the units is too narrow for heat exchange. Increase the space between the units.3. Heat exchanger is dirty or something is block on the surface. Clean the heat exchanger or remove the obstruction.4. Fan is not running. Fan motor or fan is broken, Change a new fan or fan motor.5. Water flow rate is low, there is air in system, or pump head is not enough. Release the air and reselect the pump.6. Water outlet temp.sensor is loosen or broken, reconnect it or change a new one.
F1	Low DC generatrix voltage protection	1. Check the power supply.2. If the power supply is OK,and check if LED light is OK, check the voltage PN, if it is 380V, the problem usually comes from the main board. And if the light is OFF, disconnect the power, check the IGBT, check those dioxides, if the voltage is not correct, the inverter board is damaged, change it.3. And if those IGBT are OK, which means the inverter board is OK, power from rectifier bridge is not correct, check the bridge. (Same method as IGBT, disconnect the power, check those dioxides are damaged or not).4. Usually if F1 exist when compressor start, the possible reason is main board. If F1 exist when fan start, it may be because of inverter board.
bH	PED PCB failure	1. After 5 minutes of power-off interval, power on again and observe whether it can be recovered;2. If it can't be restored, replace PED safety plate, power on again, and observe whether it can be restored;3. If it can not be recovered, the IPM module board should be replaced.

P6	L0	Module protection
	L1	DC generatrix low voltage protection
	L2	DC generatrix high voltage protection
	L4	MCE malfunction	1. Check the Heat pump system pressure.2. Check the phase resistance of compressor.3. Check the U、V、W power line connection sequence between the inverter board and the compressor.4. Check the L1、L2、L3 power line connection between the inverter board and the Filter board.5. Check the inverter board.
	L5	Zero speed protection
	L8	Speed difference >15Hz protection between the front and the back clock
	L9	Speed difference >15Hz protection between the real and the setting speed

14 TECHNICAL SPECIFICATIONS

14.1 General

Model	1-phase	1-phase	1-phase	3-phase
	4/6 kW	8/10 kW	12/14/16 kW	12/14/16 kW
Nominal capacity	Refer to the Technical Data
Dimensions HxWxD	718×1295×429mm	865×1385×526mm	865×1385×526mm	865×1385×526mm
Packing Dimensions HxWxD	885*1375*475mm 1035*1465*560mm 1035*1465*560mm 1035*1465*1560mm
Weight (without backup heater)
Net weight	86kg	105kg	129kg	144kg
Gross weight	107kg	132kg	155kg	172kg
Weight (backup heater have be intergrated in the unit)
Net weight	91kg	110kg	134kg	149kg
Gross weight	112kg	137kg	160kg	177kg
Connections
water inlet/outlet	G1"BSP	G5/4"BSP	G5/4"BSP	G5/4"BSP
Water drain	hose nipple
Expansion vessel
volume	8L
Maximum working pressure (MWP)	8 bar
Pump
Type	Water cooled	Water cooled	Water cooled	Water cooled
No. of speed	Variable speed Variable speed		Variable speed	Variable speed
Pressure relief valve water circuit	3 bar
Operation range - water side
heating	+12~+65°C
cooling	+5~+25°C
Operation range - air side
heating	-25~35°C
cooling	-5~43°C
domestic hot water by heat pump	-25~43°C

14.2 Electrical specifications

Model		1-phase 4/6/8/10/12/14/16kW	3-phase 12/14/16kW
Standard unit	Power Supply	220-240V~50Hz	380-415V 3N~50Hz
	Nominal Running Current	See “9.7.4 Safety device requirement”
Backup heater	Power Supply	See “9.7.4 Safety device requirement”
	Nominal Running Current

15 INFORMATION SERVICING

1) Checks to the area

Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.

2) Work procedure

Works shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the work is being performed.

3) General work area

All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. work in confined sapces shall be avoided. The area around the work space shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.

4) Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. no sparking, adequately sealed or intrinsically safe.

5) Presence of fire extinguisher

If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry power or CO_2 fire extinguisher adjacent to the charging area.

6) No ignition sources

No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. NO SMOKING signs shall be displayed.

7) Ventilated area

Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

8) Checks to the refrigeration equipment

Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt consult the manufacturer's technical department for assistance. The following checks shall be applied to installations using flammable refrigerants.

• The charge size is in accordance with the room size within which the refrigerant containing parts are installed.
• The ventilation machinery and outlets are operating adequately and are not obstructed.
- If an indirect refrigerating circuit is being used, the secondary circuits shall be checked for the presence of refrigerant; marking to the equipment continues to be visible and legible.
- Marking and signs that are illegible shall be corrected.
- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.

9) Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, and adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.

Initial safety checks shall include:

• That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
• That there no live electrical components and wiring are exposed while charging, recovering or purging the system.
  • That there is continuity of earth bonding.

10) Repairs to sealed components

a) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
b) Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.

- Ensure that apparatus is mounted securely.

- Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer's specifications.

NOTE

The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment. Instrinsically safe components do not have to be isolated prior to working on them.

11) Repair to intrinsically safe components

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

12) Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

13) Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

14) Leak detection methods

The following leak detection methods are deemed acceptable for systems containing flammable refrigerants. Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-calibration.(Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. If a leak is suspected ,all naked flames shall be removed or extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated(by means of shut off valves) in a part of the system remote from the leak . Oxygen free nitrogen(OFN) shall then be purged through the system both before and during the brazing process.

15) Removal and evacuation

When breaking into the refrigerant circuit to make repairs of for any other purpose conventional procedures shall be used, However, it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to:

• Remove refrigerant;
  • Purge the circuit with inert gas;
• Evacuate;
  • Purge again with inert gas;
• Open the circuit by cutting or brazing.

The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be flushed with OFN to render the unit safe. This process may need to be repeated several times.

Compressed air or oxygen shall not be used for this task.

Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system.

When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place.

This operation is absolutely vital if brazing operations on the pipe-work are to take place.

Ensure that the outlet for the vacuum pump is not closed to any ignition sources and there is ventilation available.

16) Charging procedures

In addition to conventional charging procedures, the following requirements shall be followed:

• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
  • Cylinders shall be kept upright.
• Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
• Label the system when charging is complete(if not already).
  • Extreme care shall be taken not to overfill the refrigeration system.
• Prior to recharging the system it shall be pressure tested with OFN. The system shall be leak tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.

17) Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken.

In case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.

a) Become familiar with the equipment and its operation.

b) Isolate system electrically

c) Before attempting the procedure ensure that:

• Mechanical handling equipment is available, if required, for handling refrigerant cylinders.
• All personal protective equipment is available and being used correctly.
  • The recovery process is supervised at all times by a competent person.
  • Recovery equipment and cylinders conform to the appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.

f) Make sure that cylinder is situated on the scales before recovery takes place.

g) Start the recovery machine and operate in accordance with manufacturer's instructions.

h) Do not overfill cylinders. (No more than 80% volume liquid charge).

i) Do not exceed the maximum working pressure of the cylinder, even temporarily.

j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

18) Labelling

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

19) Recovery

When removing refrigerant from a system, either for service or decommissioning, it is recommended good practice that all refrigerants are removed safely.

When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct numbers of cylinders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant(i.e special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order.

Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighting scales shall be available and in good working order.

Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.

20) Transportation, marking and storage for units

Transport of equipment containing flammable refrigerants Compliance with the transport regulations.

Marking of equipment using signs Compliance with local regulations.

Disposal of equipment using flammable refrigerants Compliance with national regulations.

Storage of equipment/appliances.

The storage of equipment should be in accordance with the manufacturer's instructions.

Storage of packed (unsold) equipment.

Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge.

The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.

ANNEX A: Refrigerant cycle

graph TD
    A["①"] --> B["②"]
    B --> C["③"]
    C --> D["④"]
    D --> E["⑤"]
    E --> F["⑥"]
    F --> G["⑦"]
    G --> H["⑧"]
    H --> I["⑨"]
    I --> J["⑩"]
    J --> K["⑪"]
    K --> L["⑫"]
    L --> M["⑬"]
    M --> N["⑭"]
    N --> O["⑮"]
    O --> P["⑯"]
    P --> Q["⑰"]
    Q --> R["⑱"]
    R --> S["⑲"]
    S --> T["⑳"]
    T --> U["⑪"]
    U --> V["⑫"]
    V --> W["⑬"]
    W --> X["⑭"]
    X --> Y["⑮"]
    Y --> Z["⑯"]
    Z --> AA["⑰"]
    AA --> AB["⑱"]
    AB --> AC["⑲"]
    AC --> AD["⑳"]
    AD --> AE["⑪"]
    AE --> AF["⑫"]
    AF --> AG["⑬"]
    AG --> AH["⑭"]
    AH --> AI["⑮"]
    AI --> AJ["⑯"]
    AJ --> AK["⑰"]
    AK --> AL["⑱"]
    AL --> AM["⑲"]
    AM --> AN["⑳"]
    AN --> AO["㉑"]
    AO --> AP["㉒"]
    AP --> AQ["㉓"]
    AQ --> AR["㉔"]
    AR --> AS["㉕"]
    AS --> AT["㉖"]
    AT --> AU["㉗"]
    AU --> AV["㉘"]
    AV --> AW["㉙"]
    AW --> AX["㉚"]
    AX --> AY["㉛"]
    AY --> AZ["㉜"]
    AZ --> BA["㉝"]
    BA --> BB["㉞"]
    BB --> BC["㉟"]
    BC --> BD["㉟a"]
    BD --> BE["㉟b"]
    BE --> BF["㉟c"]
    BF --> BG["㉟d"]
    BG --> BH["㉟e"]
    BH --> BI["㉟f"]
    BI --> BJ["㉟g"]
    BJ --> BK["㉟h"]
    BK --> BL["㉟i"]
    BL --> BM["㉟j"]
    BM --> BN["㉟k"]
    BN --> BO["㉟l"]
    BO --> BP["㉟m"]
    BP --> BQ["㉟n"]
    BQ --> BR["㉟o"]

Item	Description	Item	Description
1	Compressor	14	Refrigerant inlet (liquid pipe) temperature sensor
2	4-Way Valve	15	Refrigerant outlet (gas pipe) temperature sensor
3	Gas-liquid separator	16	Water outlet temperature sensor
4	Air side heat exchanger	17	Water Inlet temperature sensor
5	Electronic expansion Valve	18	Automatic air purge valve
6	Single-way electromagnetic valve	19	Expansion vessel
7	Strainer	20	Circulating pump
8	Water Side Heat Exchanger(Plate Heat Exchange)	21	Pressure relief valve
9	Backup heater (optional)	22	Y-shape filter
10	Flow switch	23	High Pressure Switch
11	Discharge gas sensor	24	Low Pressure Switch
12	Outdoor temperature sensor	25	Pressure sensor
13	Evaporation sensor in heating(Condenser sensor in cooling)	26	Capillary

ANNEX B:

To install the E-heating tape at the drainage outlet (by client)

Connect the wire heating tape at the drainage outlet to the wire joint XT3.

To the heating tape of drainage outlet

To the heating tape of drainage outlet

ANNEX C:

NOTE:

The picture is for reference only, please refer to the actual product.

The power of the E-heating tape shall not exceed 40W/200mA, supply volatge 230VAC.

DISPOSAL OF ELECTRICAL AND ELECTRONIC EQUIPMENT

To protect our environment and to recycle the raw materials used as completely as possible, the consumer is asked to return unserviceable equipment to the public collection system for electrical and electronic.

The symbol of the crossed indicates that this product must be returned to the collection point for electronic waste to feed it by recycling the best possible raw material recycling.

By ensuring this product you will prevent possible negative effects on the environment and human health, which could otherwise be caused due to improper disposal of that product. The recycling of materials from this product, you will help to preserve a healthy environment and natural resources. For detailed information about the collection of EE products contact the dealer where you purchased the product.

EU DECLARATON OF CONFORMITY

This device is manufactured in accordance with the applicable European standards and in accordance with all applicable Directives and Regulations.

EU declaration of conformity can be downloaded from the following link: www.msan.hr/dokumentacijaartikala

VIVAX