3PAMSCH18 - Air Conditioning Perfect Aire - Free user manual and instructions

Product Type	Portable Air Conditioner
Model	3PAMSCH18
Brand	Perfect Aire
Cooling Capacity (BTU)	18000 BTU
Cooling Coverage	Up to 800 sq. ft.
Energy Efficiency Ratio (EER)	10.5
Dehumidification Capacity	Up to 3.5 pints/hour
Air Flow	3 fan speeds (Low, Medium, High)
Controls	Electronic control panel with remote control
Timer	24-hour programmable timer
Thermostat	Digital thermostat with temperature display
Modes	Cool, Fan, Dehumidify, Auto, Sleep modes
Installation	Window kit included for exhaust hose (slide or casement window)
Power Input	115V / 60Hz / 15A
Power Cord Length	6 ft. with 3-prong grounded plug
Dimensions (W x D x H)	18.5" x 15.5" x 31.5"
Weight	75 lbs.
Refrigerant Type	R-410A (environmentally friendly)
Noise Level	55 dB (low speed) to 62 dB (high speed)
Auto Restart	Yes, after power outage
Filter	Washable and reusable mesh filter
Castors	4 caster wheels for easy mobility
Maintenance	Clean filter every 2 weeks; drain condensate manually or via continuous drain hose

Frequently Asked Questions - 3PAMSCH18 Perfect Aire

How do I install the Perfect Aire 3PAMSCH18 portable air conditioner?

The unit comes with a window kit. Slide the window open, place the kit, and attach the exhaust hose. For detailed steps, refer to the installation section of the user manual.

What is the correct way to drain the condensate?

The 3PAMSCH18 has a manual drain plug at the bottom. You can also attach a garden hose for continuous drainage if draining into a floor drain is preferred.

How often should I clean the filter?

Clean the washable mesh filter every 2 weeks under normal use. A dirty filter reduces efficiency and airflow.

Can I use the air conditioner without the exhaust hose?

No, the exhaust hose must be vented outside through a window or sliding door for the unit to function properly. Using it without venting will cause overheating and poor cooling.

What does the Sleep mode do?

Sleep mode gradually adjusts the temperature (usually +2°F over 2 hours) and reduces fan speed to create a more comfortable sleeping environment while saving energy.

How do I use the remote control?

Insert two AAA batteries (not included) into the remote. Point it at the unit's receiver. The remote can control power, mode, fan speed, timer, and temperature settings.

Why is my unit not cooling properly?

Check if the filter is dirty, the exhaust hose is kinked or disconnected, or if all doors/windows are closed. Also ensure the unit is sized correctly for the room (up to 800 sq. ft.).

What is the recommended room size for this model?

The 3PAMSCH18 is designed to cool areas up to 800 square feet under standard conditions. Actual performance may vary with ceiling height and insulation.

How do I set the timer?

Press the Timer button on the control panel or remote. Use the +/- buttons to set the desired hours (1-24). The unit will automatically turn on or off after the set time.

Is the unit energy efficient?

Yes, with an EER of 10.5, it is moderately efficient. Using Energy Saver mode and programmable timer can help reduce electricity consumption.

USER MANUAL 3PAMSCH18 Perfect Aire

Exterior view of a black and white ceiling fan with ventilation grilles (no text or symbols visible)

PACKING AND UNPACKING THE UNIT....5

SAFETY PRECAUTIONS 6

BEST INSTALLATION PRACTICES....9

OWNER'S MANUAL

UNIT SPECIFICATIONS AND FEATURES....10

INDOOR UNIT DISPLAY 10

OTHER FEATURES....12

CARE AND MAINTENANCE....13

CLEANING YOUR INDOOR UNIT 13

CLEANING YOUR AIR FILTER....13

MAINTENANCE - LONG PERIODS OF NON-USE....14

MAINTENANCE - PRE-SEASON INSPECTION....14

TROUBLESHOOTING....15

COMMON ISSUES 15

TROUBLESHOOTING 16

ACCESSORIES....18

INSTALLATION MANUAL

INSTALLATION SUMMARY ...... 19

UNIT PARTS 20

3PAMSCH12 & 3PAMSCH18....20

3PAMSCH24 21

INDOOR UNIT INSTALLATION 22

STEP 1: SELECT INSTALLATION LOCATION....22

STEP 2: HANG INDOOR UNIT 23

STEP 3: DRILL WALL HOLE FOR CONNECTIVE PIPING 25

STEP 4: CONNECT DRAIN HOSE 25

OUTDOOR UNIT INSTALLATION....28

STEP 1: SELECT INSTALLATION LOCATION....29

STEP 2: INSTALL DRAIN JOINT 29

STEP 3: ANCHOR OUTDOOR UNIT 29

REFRIGERANT PIPING CONNECTION 31

NOTE ON PIPE LENGTH 31

CONNECTION INSTRUCTIONS - REFRIGERANT PIPING 32

STEP 1: CUT PIPES 32

STEP 2: REMOVE BURRS 32

STEP 3: FLARE PIPE ENDS....32

STEP 4: CONNECT PIPES 33

IMPORTANT NOTE:

Read this manual and SAFETY MANUAL(if any) carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.

Please check the applicable models, technical data, F-GAS (if any) and manufacturer information from the "Owner's Manual - Product Fiche" in the packaging of the outdoor unit (European Union products only) or in the packaging of the indoor unit (model dependent)

TABLE OF CONTENTS

(Continued)

INSTALLATION MANUAL CONTINUED

WIRING....35

OUTDOOR UNIT WIRING....36

CHOOSE THE RIGHT CABLE SIZE....36 INDOOR UNIT WIRING....36

AIR EVACUATION 38

PREPARATIONS AND PRECAUTIONS....38

EVACUATION INSTRUCTIONS 38

NOTE ON ADDING REFRIGERANT 39

PANEL INSTALLATION....40

3PAMSCH12 & 3PAMSCH18....40

STEP 1: REMOVE THE FRONT GRILLE 40

STEP 2: INSTALL THE PANEL 40

STEP 3: MOUNT THE INTAKE GRILLE 40

STEP 4: CONNECT WIRES 40

STEP 5: FASTEN CONTROL BOX LID 40

STEP 6: CLOSE INTAKE GRILLE 40

3PAMSCH24....41

STEP 1: REMOVE THE FRONT GRILLE 47

STEP 2: REMOVE INSTALLATION COVERS....41

STEP 3: INSTALL THE PANEL ....41

STEP 4: HANG THE INTAKE GRILLE 42

STEP 5: RE-INSTALLED INTO STYLE GRID 42

TEST RUN 43

BEFORE TEST RUN 43

TEST RUN INSTRUCTIONS ....43

WARNING: Cancer www.P65Warnings.ca.gov

PACKING AND UNPACKING THE UNIT

INSTRUCTIONS FOR PACKING AND UNPACKING THE UNIT:

UNPACKING:

Indoor unit:

1 Cut the packing belt.
2 Unpack the package.
3 Take out the packing cushion and packing support.
4 Remove the packing film.
5 Take out the accessories.
6 Lift the machine out and lay it flat.

Outdoor Unit:

1 Cut the packing belt.
2 Take the unit out of the carton.
Remove the foam from the unit.
4 Remove the packaging bag from the unit.

PACKING:

Indoor unit:

1 Put the indoor unit into the packing film.
2 Put the accessories in.
3 Place the packing cushion and packing support.
4 Put the indoor unit into the package.
5 Close the package and seal it.
6 Using the packing belt if necessary.

Outdoor unit:

1 Put the outdoor unit into the packing film.
2 Put the bottom foam into the box.
3 Put the outdoor unit into the package, then put the upper packaging foam on the unit.
4 Close the package and seal it.
Using the packing belt if necessary.

NOTE: Please keep all packaging items if you may need in the future.

SAFETY PRECAUTIONS

Read Safety Precautions Before Operation and Installation

Incorrect installation due to ignoring instructions can cause serious damage or injury.

The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.

WARNING

This symbol indicates the possibility of personnel injury or loss of life.

WARNING

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

CAUTION

This symbol indicates the possibility of property damage or serious consequences.

PRODUCT USE WARNINGS

• If an abnormal situation arises (like a burning smell), immediately turn on the unit and disconnect the power. Call your dealer for instructions to avoid electric shock, re or injury.
• Do not insert ngers, rods or other objects into the air inlet or outlet. This may cause injury, since the fan may be rotating at high speeds.
• Do not use ammable sprays such as hair spray, lacquer or paint near the unit. This may cause re or combustion.
• Do not operate the air conditioner in places near or around combustible gases. Emitted gas may collect around the unit and cause explosion.
• Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to water can cause electrical components to short circuit.
• Do not expose your body directly to cool air for a prolonged period of time.
• Do not allow children to play with the air conditioner. Children must be supervised around the unit at all times.
• If the air conditioner is used together with burners or other heating devices, thoroughly ventilate the room to avoid oxygen deficiency.
  • In certain functional environments, such as kitchens, server rooms, etc., the use of specially designed air-conditioning units is highly recommended.

SAFETY PRECAUTIONS

(Continued)

CAUTION

• Turn o the air conditioner and disconnect the power if you are not going to use it for a long time.
  • Turn o and unplug the unit during storms.
  • Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open, or if the humidity is very high.

TAKE NOTE OF FUSE SPECIFICATIONS

The air conditioner's circuit board (PCB) is designed with a fuse to provide over current protection.

The specifications of the fuse are printed on the circuit board, such as :

T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC, etc.

▲ CLEANING AND

MAINTENANCE WARNINGS

• Turn o the device and disconnect the power before cleaning. Failure to do so can cause electrical shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents can cause re or deformation.

▲ ELECTRICAL WARNINGS

• Only use the specified power cord. If the power cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty plugs can cause re or electric shock.
• Do not pull power cord to unplug unit. Hold the plug rmly and pull it from the outlet. Pulling directly on the cord can damage it, which can lead to re or electric shock.
• Do not modify the length of the power supply cord or use an extension cord to power the unit.
• Do not share the electrical outlet with other appliances. Improper or insu cient power supply can cause re or electrical shock.
• The product must be properly grounded at the time of installation, or electrical shock may occur.
• For all electrical work, follow all local and national wiring standards, regulations, and the Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces from damaging the terminal. Improper electrical connections can overheat and cause re, and may also cause shock. All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the indoor and outdoor units.
• All wiring must be properly arranged to ensure that the control board cover can close properly. If the control board cover is not closed properly, it can lead to corrosion and cause the connection points on the terminal to heat up, catch re, or cause electrical shock.
• If connecting power to xed wiring, an all-pole disconnection device which has at least 3mm clearances in all poles, and have a leakage current that may exceed 10mA , the residual current device (RCD) having a rated residual operating current not exceeding 30mA , and disconnection must be incorporated in the xed wiring in accordance with the wiring rules.

SAFETY PRECAUTIONS

(Continued)

PRODUCT INSTALLATION WARNINGS

1 Installation must be performed by an authorized dealer or specialist. Defective installation can cause water leakage, electrical shock, or re.
2 Installation must be performed according to the installation instructions. Improper installation can cause water leakage, electrical shock, or re. (In North America, installation must be performed in accordance with the requirement of NEC and GFC by authorized personnel only.)
3 Contact an authorized service technician for repair or maintenance of this unit. This appliance shall be installed in accordance with national wiring regulations.
4 Only use the included accessories, parts, and specified parts for installation. Using non-standard parts can cause water leakage, electrical shock, re, and can cause the unit to fail.
Install the unit in a rm location that can support the unit's weight. If the chosen location cannot support the unit's weight, or the installation is not done properly, the unit may drop and cause serious injury and damage.
6 Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your home and property.
7 For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of any combustible materials
Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around the unit, it may cause re.

Do not turn on the power until all work has been completed.
10 When moving or relocating the air conditioner, consult experienced service technicians for disconnection and re-installation of the unit.
11 How to install the appliance to its support, please read the information for details in "indoor unit installation" and "outdoor unit installation" sections.

NOTE ABOUT FLUORINATED GASES

This air-conditioning unit contains urinated greenhouse gases. For speci c information on the type of gas and the amount, please refer to the relevant label on the unit itself or the 'Owner's Manual - Product Fiche' in the packaging of the outdoor unit. (European Union products only).
2 Installation, service, maintenance and repair of this unit must be performed by a certified technician.
3 Product uninstallation and recycling must be performed by a certified technician
For equipment that contains uorinated greenhouse gases in quantities of 5 tonnes of CO2 equivalent or more, but of less than 50 tonnes of CO2 equivalent, if the system has a leak-detection system installed, it must be checked for leaks at least every 24 months.
5 When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

SAFETY PRECAUTIONS

(Continued)

BEST INSTALLATION PRACTICES

• A SURGE PROTECTOR IS HIGHLY RECOMMENDED TO PREVENT DAMAGE TO THE EQUIPMENT DUE TO ELECTRICAL FAILURE
• VERIFY THE WALL IS PLUMB. AN UNPLUMB WALL WILL CAUSE BLOWER WHEEL TO BE UNBALANCED
• NEVER USE WIRE NUTS ON THE COMMUNICATION CABLE. CRIMP TYPE CONNECTORS ARE ALLOWED
• WIRING BETWEEN INDOOR AND OUTDOOR UNITS IS POLARITY SENSITIVE.(EXAMPLE: IF INDOOR UNIT IS WIRED BLACK ON 1, RED ON 2 AND WHITE ON 3, IT NEEDS TO BE THE SAME ON THE OUTDOOR UNIT)
  • A MINIMUM OF 16 AWG, STRANDED 4 WIRE, FT4 RATED, 300 VOLTS WIRE IS NEEDED
• BE SURE TO MAKE ALL FLARES WITH AN APPROVED 410A FLARING TOOL
  • A MINIMUM OF 10 FT. LINE SET IS REQUIRED
• ON SINGLE-ZONE: IF LINE SET IS LONGER THAN 25 FT. YOU WILL NEED TO WEIGH IN THE RECOMMENDED AMOUNT OF REFRIGERANT. SEE INSTALLATION AND OPERATION MANUAL
• ON MULTI-ZONE: THERE IS ENOUGH REFRIGERANT FOR 25 FT. OF LINE SET PER ZONE (EXAMPLE: 3-ZONE = 75 FT. OF LINE SET)
• USE OIL OR NYLOG ON THE THREADS AND TORQUE NUTS TO THE PROPER SPECIFIED VALUE. SEE INSTALLATION AND OPERATION MANUAL
  • ALWAYS USE THE SUCTION/GAS LINE TO ADD OR REMOVE REFRIGERANT
• TEST FOR LEAKS BY PRESSURIZING THE SYSTEM WITH MINIMUM 500 POUNDS OF NITROGEN AND HOLD FOR AT LEAST 60 MINUTES
  • EVACUATE THE SYSTEM DOWN TO A MINIMUM OF 500 MICRONS AND HOLD FOR 30 MINUTES

UNIT SPECIFICATIONS AND FEATURES

INDOOR UNIT DISPLAY

NOTE: Different models have different front panels and display windows. Not all the display codes describing below are available for the air conditioner you purchased. Please check the indoor display window of the unit you purchased. Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit may be slightly different. The actual shape shall prevail. This display panel on the indoor unit can be used to operate the unit in case the remote control has been misplaced or is out of batteries.

Operation indicator:

Timer indicator:

PRE-DEF Indicator: (pre-heating/defrost)

Alarm indicator:

3PAMSCH12 & 3PAMSCH18

graph TD
    A["LED display"] --> B["Infrared receiver"]
    B --> C["Manual button"]
    C --> D["Operation Indicator"]
    D --> E["Timer Indicator"]
    E --> F["Alarm Indicator"]
    F --> G["PREF-DEF (pre-heating/defrost) indicator"]

3PAMSCH24

MANUAL button: This button selects the mode in the following order: AUTO, FORCED COOL, OFF.

FORCED COOL mode: In FORCED COOL mode, the Operation light flashes. The system will then turn to AUTO after it has cooled with a high wind speed for 30 minutes. The remote control will be disabled during this operation.

OFF mode: When the display panel is turned off, the unit turns off and the remote control is re-enabled

UNIT SPECIFICATIONS AND FEATURES

(Continued)

When your air conditioner is used outside of the following temperature ranges, certain safety protection features may activate and cause the unit to disable.

INVERTER SPLIT TYPE

COOL mode HEAT mode DRY mode
Room Temperature	60°F - 90°F(16°C - 32°C)	32°F - 86°F(0°C - 30°C)	50°F - 90°F(10°C - 32°C)
Outdoor Temperature	32°F - 122°F(0°C - 50°C)	5°F - 75°F(-15°C - 24°C)	32°F - 122°F(0°C - 50°C)
	5°F - 122°F(-15°C - 50°C)(For models with low-temp cooling systems.)

NOTE: Room relative humidity less than 80%. If the air conditioner operates in excess of this figure, the surface of the air conditioner may attract condensation. Please set the vertical airflow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.

To further optimize the performance of your unit, do the following:

• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
  • Regularly inspect and clean air filters.

UNIT SPECIFICATIONS AND FEATURES

(Continued)

OTHER FEATURES

- DEFAULT SETTING

When the air conditioner restarts after a power failure, it will default to the factory settings (AUTO mode, AUTO fan, 76°F(24°C)). This may cause inconsistencies on the remote control and unit panel. Use your remote control to update the status.

• AUTO-RESTART

In case of power failure, the system will immediately stop. When power returns, the Operation light on the indoor unit will flash. To restart the unit, press the ON/OFF button on the remote control. If the system has an auto restart function, the unit will restart using the same settings.

• THREE-MINUTE PROTECTION FEATURE

A protection feature prevents the air conditioner from being activated for approximately 3 minutes when it restarts immediately after operation.

- LOUVER ANGLE MEMORY

Some models are designed with a louver angle memory function. When the unit restarts after a power failure, the angle of the horizontal louvers will automatically return to the previous position. The angle of the horizontal louver should not be set too small as condensation may form and drip into the machine. To reset the louver, press the manual button, which will reset the horizontal louver settings.

• REFRIGERANT LEAKAGE DETECTION 3PAMSCH24 MODEL ONLY

In the event of a refrigerant leak, the LED DISPLAY will display refrigerant leak error code and the LED indicator light will flash.

CARE AND MAINTENANCE

CLEANING YOUR INDOOR UNIT

BEFORE CLEANING OR MAINTENANCE

ALWAYS TURN OFF YOUR AIR CONDITIONER SYSTEM AND DISCONNECT ITS POWER SUPPLY BEFORE CLEANING OR MAINTENANCE.

CAUTION

Only use a soft, dry cloth to wipe the unit clean. If the unit is especially dirty, you can use a cloth soaked in warm water to wipe it clean.

• Do not use chemicals or chemically treated cloths to clean the unit.
• Do not use benzene, paint thinner, polishing powder or other solvents to clean the unit. They can cause the plastic surface to crack or deform.
• Do not use water hotter than 104^ (40°C) to clean the front panel. This can cause the panel to deform or become discolored.

CLEANING YOUR AIR FILTER

A clogged air conditioner can reduce the cooling efficiency of your unit, and can also be bad for your health. Make sure to clean the filter once every two weeks.

WARNING: DO NOT REMOVE OR CLEAN THE FILTER BY YOURSELF

Removing and cleaning the filter can be dangerous. Removal and maintenance must be performed by a certified technician.

1 Remove the air filter.
2 Clean the air filter by vacuuming the surface or washing it in warm water with mild detergent.
3 Rinse the filter with clean water and allow it to air-dry. DO NOT let the filter dry in direct sunlight.
4 Reinstall the filter.

If using water, the inlet side should face down and away from the water stream.

If using a vacuum cleaner, the inlet side should face the vacuum.

CAUTION

• Before changing the filter or cleaning, turn off the unit and disconnect its power supply.
• When removing filter, do not touch metal parts in the unit. The sharp metal edges can cut you.
• Do not use water to clean the inside of the indoor unit. This can destroy insulation and cause electrical shock.
• Do not expose filter to direct sunlight when drying. This can shrink the filter.

CAUTION

• Any maintenance and cleaning of outdoor unit should be performed by an authorized dealer or a licensed service provider.
• Any unit repairs should be performed by an authorized dealer or a licensed service provider.

CARE AND MAINTENANCE

(Continued)

MAINTENANCE- LONG PERIODS OF NON-USE

If you plan not to use your air conditioner for an extended period of time, do the following:

Clean all filters Turn on FAN function until unit dries out completely

function until unit dries out completely

Turn off the unit and disconnect the power

Remove batteries from remote control

MAINTENANCE- PRE-SEASON INSPECTION

After long periods of non-use, or before periods of frequent use, do the following:

Check for damaged wires

Clean all filters

Check for leaks Replace batteries

Make sure nothing is blocking all air inlets and outlets

TROUBLESHOOTING

SAFETY PRECAUTIONS

If ANY of the following conditions occurs, turn off your unit immediately!

• The power cord is damaged or abnormally warm
- You smell a burning odor
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit

DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER IMMEDIATELY!

COMMON ISSUES

The following problems are not a malfunction and in most situations will not require repairs.

Issue Possible Causes

Unit does not turn on when pressing ON/OFF button	The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted within three minutes of being turned off.
	Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-heating/Defrost) indicators are lit up, the outdoor temperature is too cold and the unit's anti-cold wind is activated in order to defrost the unit.
	In Cooling-only Models: If the "Fan Only" indicator is lit up, the outdoor temperature is too cold and the unit's anti-freeze protection is activated in order to defrost the unit.
The unit changes from COOL/HEAT mode to FAN mode	The unit may change its setting to prevent frost from forming on the unit.Once the temperature increases, the unit will start operating in the previously selected mode again.
	The set temperature has been reached, at which point the unit turns off the compressor.The unit will continue operating when the temperature fluctuates again.
The indoor unit emits white mist	In humid regions, a large temperature difference between the room's air and the conditioned air can cause white mist.
Both the indoor and outdoor units emit white mist	When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture generated from the defrosting process.
The indoor unit makes noises	A rushing air sound may occur when the louver resets its position.
	A squeaking sound is heard when the system is OFF or in COOL mode.The noise is also heard when the drain pump (optional) is in operation.
	A squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the unit's plastic parts.

TROUBLESHOOTING

(Continued)

Issue Possible Causes

Both the Indoor unit and outdoor unit make noises	Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both indoor and outdoor units.
	Low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas stopping or changing direction.
	Squeaking sound: Normal expansion and contraction of plastic and metal parts caused by temperature changes during operation can cause squeaking noises.
The outdoor unit makes noises	The unit will make different sounds based on its current operating mode.
Dust is emitted from either the indoor or outdoor unit	The unit may accumulate dust during extended periods of non-use, which will be emitted when the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.
The unit emits a bad odor	The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.
	The unit's filters have become moldy and should be cleaned.
The fan of the outdoor unit does not operate	During operation, the fan speed is controlled to optimize product operation.

NOTE: If problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit malfunction as well as your model number.

TROUBLESHOOTING

When troubles occur, please check the following points before contacting a repair company.

Problem Possible Causes Solution

Poor cooling performance	Temperature setting may be higher than ambient room temperature	Lower the temperature setting
	The heat exchanger on the indoor or outdoor unit is dirty	Clean the affected heat exchanger
	The air filter is dirty	Remove the filter and clean it according to instructions
	The air inlet or outlet of either unit is blocked	Turn the unit off, remove the obstruction and turn it back on
	Doors and windows are open	Make sure that all doors and windows are closed while operating the unit
	Excessive heat is generated by sunlight	Close windows and curtains during periods of high heat or bright sunshine
	Too many sources of heat in the room (people, computers, electronics, etc.)	Reduce amount of heat sources
	Low refrigerant due to leak or long-term use	Check for leaks, re-seal if necessary and top off refrigerant

TROUBLESHOOTING

(Continued)

Problem Possible Causes Solution

The unit is not working	Power failure Wait for the power to be restored
	The power is turned off Turn on the power
	The fuse is burned out Replace the fuse
	Remote control batteries are dead Replace batteries
	The Unit's 3-minute protection has been activated	Wait three minutes after restarting the unit
	Timer is activated Turn timer off
The unit starts and stops frequently	There's too much or too little refrigerant in the system	Check for leaks and recharge the system with refrigerant.
	Incompressible gas or moisture has entered the system.	Evacuate and recharge the system with refrigerant
	The compressor is broken Replace the compressor
	The voltage is too high or too low	Install a manostat to regulate the voltage
Poor heating performance	The outdoor temperature is extremely low	Use auxiliary heating device
	Cold air is entering through doors and windows	Make sure that all doors and windows are closed during use
	Low refrigerant due to leak or long-term use	Check for leaks, re-seal if necessary and top off refrigerant

Indicator lamps

continue flashing

Error code appears andbegins with the letters asthe following in the windowdisplay of indoor unit:

• E(x), P(x), F(x)

• EH(xx), EL(xx), EC(xx)

• PH(xx), PL(xx), PC(xx)

NOTE: If your problem persists after performing the checks and diagnostics above, turn off your unit immediately and contact an authorized service center.

ACCESSORIES

The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail. The items are not included with the air conditioner must be purchased separately.

Accessory	Quantity (pc)	Shape Accessory		Quantity (pc)	Shape
Manual	1	(1248)	Installation paper template	1	(T6H)
Outlet pipe sheath (some models)	1	(5134)	Drain joint	1	(6555)
Outlet pipe clasp	1~2	(37K8)	Seal ring	1	(YWCV)
			Copper nut	2	(ATCC)

OPTIONAL ACCESSORIES

There are two types of remote controls: wired and wireless. Select a remote controller based on customer preferences and requirements and install in an appropriate place.

Refer to catalogues and technical literature for guidance on selecting a suitable remote control.

Name Shape Quantity (PC)

Connecting pipe assembly	Liquid side	6.35 (1/4 in)	Parts you must purchase separately. Consult the dealer about the proper pipe size of the unit you purchased.
		9.52 (3/8in)
		12.7 (1/2in)
	Gas side	9.52 (3/8in)
		12.7 (1/2in)
		16 (5/8in)
		19 (3/4in)
		22 (7/8in)

INSTALLATION SUMMARY

1

Install the indoor unit

2

Install the drainpipe

3

Install the outdoor unit

6

Evacuate the refrigeration system

5

Connect the wires

4

Connect the refrigerant pipes

7

Install the front panel

8

Perform a test run

UNIT PARTS

3PAMSCH12 & 3PAMSCH18

NOTE: The installation must be performed in accordance with the requirement of local and national standards. The installation may be slightly different in different areas.

① Air outlet
④ Display panel
⑦ Connecting pipe
② Air inlet
⑤ Remote control
⑧ Air inlet
③ Front grille
⑥ Drain pipe
⑨ Air outlet

UNIT PARTS

(Continued)

3PAMSCH24

① Air outlet
④ Display panel
⑦ Connecting pipe
② Air inlet
⑤ Remote control
⑧ Air inlet
③ Front grille
⑥ Drain pipe
⑨ Air outlet

NOTE ON ILLUSTRATIONS: Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit may be slightly different. The actual shape shall prevail.

INDOOR UNIT INSTALLATION

INSTALLATION INSTRUCTIONS - INDOOR UNIT

NOTE: Panel installation should be performed after piping and wiring have been completed.

STEP 1: SELECT INSTALLATION LOCATION

Before installing the indoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit.

Proper installation locations

meet the following standards:

☑ Enough room exists for installation and maintenance.
☑ Enough room exists for the connecting the pipe and drainpipe.
☑ The ceiling is horizontal and its structure can sustain the weight of the indoor unit.
☑ The air inlet and outlet are not blocked.
☑ The airflow can fill the entire room.
☑ There is no direct radiation from heaters.

DO NOT install unit

in the following locations:

Areas with oil drilling or fracking
Coastal areas with high salt content in the air
Areas with caustic gases in the air, such as hot springs
Areas that experience power fluctuations, such as factories
⊗ Enclosed spaces, such as cabinets
⊗ Kitchens that use natural gas
Areas with strong electromagnetic waves
Areas that store flammable materials or gas
Rooms with high humidity, such as bathrooms or laundry rooms

RECOMMENDED DISTANCES BETWEEN THE INDOOR UNIT AND THE CEILING

The distance between the mounted indoor unit and the internal ceiling should meet the following specifications.

3PAMSCH12 & 3PAMSCH18

Distance from ceiling relative to height of indoor unit

LENGTH OF A(INCH/MM)	LENGTH OF H(INCH/MM)	LENGTH OF B(INCH/MM)
10.2/260 11.4/>	290 23.6/600

3PAMSCH24

Distance from ceiling relative to height of indoor unit

LENGTH OF A(INCH/MM)	LENGTH OF H(INCH/MM)	LENGTH OF B(INCH/MM)
8.03/205 9.06/230	35.4/900

INDOOR UNIT INSTALLATION

(Continued)

STEP 2: HANG INDOOR UNIT

1 Use the included paper template to cut a rectangular hole in the ceiling, leaving at least 39"(1m) on all sides. The cut hole size should be 1.6"(4cm) larger than the body size.
Be sure to mark the areas where ceiling hook holes will be drilled.

3PAMSCH12 & 3PAMSCH18

Compact models ceiling hole size

3PAMSCH24

CAUTION

The unit body should align perfectly with the hole. Ensure that the unit and the hole are the same size before moving on.

3PAMSCH12 & 3PAMSCH18

Drill 4 holes 2" (5cm) deep at the ceiling hook positions in the internal ceiling. Be sure to hold the drill at a 90° angle to the ceiling.

3PAMSCH24

Drill 4 holes 4.7"-6.1" (12cm-15.5cm) deep at the ceiling hook positions in the internal ceiling. Be sure to hold the drill at a 90° angle to the ceiling.

Using a hammer, insert the ceiling hooks into the pre-drilled holes. Secure the bolt using the included washers and nuts.

Install the four suspension bolts.

INDOOR UNIT INSTALLATION

(Continued)

Mount the indoor unit. You will need two people to lift and secure it. Insert suspension bolts into the unit's hanging holes. Fasten them using the included washers and nuts.

3PAMSCH12 & 3PAMSCH18

NOTE: The bottom of the unit should be 0.9" (24mm)higher than the ceiling board. Generally, L (indicated in the following figure) should be half the length of the suspension bolt or long enough to prevent the nuts from coming off.

3PAMSCH24

NOTE: The bottom of the unit should be 0.4-0.98" (10-25mm) higher than the ceiling board. Generally, L (indicated in the following figure) should be half the length of the suspension bolt or long enough to prevent the nuts from coming off.

CAUTION

Ensure that the unit is completely level. Improper installation can cause the drain pipe to back up into the unit or water leakage.

NOTE: Ensure that the indoor unit is level. The unit is equipped with a built-in drain pump and float switch. If the unit is tilted against the direction of condensate flows (the drainpipe side is raised), the float switch may malfunction and cause water to leak. (for some models)

INDOOR UNIT INSTALLATION

(Continued)

NOTE FOR NEW HOME INSTALLATION

When installing the unit in a new home, the ceiling hooks can be embedded in advance. Make sure that the hooks do not come loose due to concrete shrinkage. After installing the indoor unit, fasten the installation paper template onto the unit with bolts to determine in advance the dimension and position of the opening on the ceiling. Follow the instructions above for the remainder of the installation.

STEP 3: DRILL WALL HOLE FOR CONNECTIVE PIPING

1 Determine the location of the wall hole based on the position of the mounting plate. Refer to Mounting Plate Dimensions.
2 Using a 2.5in (65mm) or 3.54in (90mm) (depending on models) core drill, drill a hole in the wall. Make sure that the hole is drilled at a slight downward angle, so that the outdoor end of the hole is lower than the indoor end by about 0.2-0.275in (5mm to 7mm). This will ensure proper water drainage.
3 Place the protective wall cuff in the hole. This protects the edges of the hole and will help seal it when you finish the installation process.

CAUTION

When drilling the wall hole, make sure to avoid wires, plumbing, and other sensitive components.

CAUTION

When drilling the wall hole, make sure to avoid wires, plumbing, and other sensitive components.

STEP 4: CONNECT DRAIN HOSE

The drainpipe is used to drain water away from the unit. Improper installation may cause unit and property damage.

CAUTION

• Insulate all piping to prevent condensation, which could lead to water damage.
- If the drainpipe is bent or installed incorrectly, water may leak and cause a water-level switch malfunction.
- In HEAT mode, the outdoor unit will discharge water. Ensure that the drain hose is placed in an appropriate area to avoid water damage and slippage.
- DO NOT pull the drainpipe forcefully. This could disconnect it.

NOTE ON PURCHASING PIPES

Installation requires a polyethylene tube (exterior diameter = 2.5cm or 3.7-3.9cm) (depending on models), which can be obtained at your local hardware store or dealer.

INDOOR UNIT INSTALLATION

(Continued)

Indoor Drainpipe Installation

Install the drainpipe as illustrated in the following Figure.

3PAMSCH12 & 3PAMSCH18

3PAMSCH24

NOTE ON DRAINPIPE INSTALLATION

• When using an extended drainpipe, tighten the indoor connection with an additional protection tube to prevent it from pulling loose.
• The drainpipe should slope downward at a gradient of at least 1/100 to prevent water from flowing back into the air conditioner.
  • To prevent the pipe from sagging, space hanging wires every 39-59" (1-1.5m).
• If the outlet of the drainpipe is higher than the body's pump joint, provide a lift pipe for the exhaust outlet of the indoor unit. The lift pipe must be installed no higher than 29.5" (75cm) from the ceiling board and the distance between the unit and the lift pipe must be less than 11.8" (30cm) (depending on models).
• Incorrect installation could cause water to flow back into the unit and flood.
• To prevent air bubbles, keep the drain hose level or slightly tiled up (< 3°/75mm) (some models).

3PAMSCH12 & 3PAMSCH18

3PAMSCH24

INDOOR UNIT INSTALLATION

(Continued)

NOTE: When connecting multiple drainpipes, install the pipes as illustrated in the following Figure.

3PAMSCH12 & 3PAMSCH18

3PAMSCH24

Pass the drain hose through the wall hole. Make sure the water drains to a safe location where it will not cause water damage or a slipping hazard.

NOTE: The drainpipe outlet should be at least 1.9" (5cm) above the ground. If it touches the ground, the unit may become blocked and malfunction. If you discharge the water directly into a sewer, make sure that the drain has a U or S pipe to catch odors that might otherwise come back into the house.

How to Install the conduit installation plate (if supplied)

1 Fix the sheath connector (not supply) on the wire hole of the conduit installation plate.
2 Fix the conduit installation plate on the chassis of the unit.

OUTDOOR UNIT INSTALLATION

Install the unit by following local codes and regulations, there may be differ slightly between different regions.

INSTALLATION INSTRUCTIONS - OUTDOOR UNIT

STEP 1: SELECT INSTALLATION LOCATION

Before installing the outdoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit.

Proper installation locations meet the following standards:

√ Meets all spatial requirements shown in Installation Space Requirements above.
☑ Good air circulation and ventilation
☑ Firm and solid—the location can support the unit and will not vibrate
☑ Noise from the unit will not disturb others
☑ Protected from prolonged periods of direct sunlight or rain
☑ Where snowfall is anticipated, take appropriate measures to prevent ice buildup and coil damage.

DO NOT Install unit in the following locations:

• Near an obstacle that will block air inlets and outlets
  Near a public street, crowded areas, or where noise from the unit will disturb others
• Near animals or plants that will be harmed by hot air discharge
  ⊗ Near any source of combustible gas
  In a location that is exposed to large amounts of dust
  In a location exposed to a excessive amounts of salty air

If the unit is exposed to heavy wind: Install unit so that air outlet fan is at a 90° angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely heavy winds. See Figures below.

If the unit is frequently exposed to heavy rain or snow:

Build a shelter above the unit to protect it from the rain or snow. Be careful not to obstruct airflow around the unit.

If the unit is frequently exposed to salty air (seaside):

Use outdoor unit that is specially designed to resist corrosion.

OUTDOOR UNIT INSTALLATION

(Continued)

STEP 2: INSTALL DRAIN JOINT

Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. Note that there are two different types of drain joints depending on the type of outdoor unit.

If the drain joint comes with a rubber seal (see Fig. A), do the following:

1 Fit the rubber seal on the end of the drain joint that will connect to the outdoor unit.
2 Insert the drain joint into the hole in the base pan of the unit.
3 Rotate the drain joint 90° until it clicks in place facing the front of the unit.
4 Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode.

If the drain joint doesn't come with a rubber seal (see Fig. B), do the following:

1 Insert the drain joint into the hole in the base pan of the unit. The drain joint will click in place.
2 Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode.

IN COLD CLIMATES

In cold climates, make sure that the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it can freeze in the hose and flood the unit.

STEP 3: ANCHOR OUTDOOR UNIT

The outdoor unit can be anchored to the ground or to a wall-mounted bracket with bolt(M10). Prepare the installation base of the unit according to the dimensions below.

UNIT MOUNTING DIMENSIONS

The following is a list of different outdoor unit sizes and the distance between their mounting feet. Prepare the installation base of the unit according to the dimensions below.

Outdoor Unit Types and Specifications

Split Type Outdoor Unit

OUTDOOR UNIT INSTALLATION

(Continued)

Outdoor Unit Dimensions (in) Mounting Dimensions
W ×H ▪ Distance A (in) Distance B (in)

29.9×23.2 1:1.2(760 580 208mm) 20.85 (530mm) 11.4 (290mm)
31.9×22×12.2(810 858 340mm) 21.6 (549mm)	12.6 (325mm)
33.27×27.5×42.6(845 700 380mm)	22 (560mm)	13.2 (335mm)
35.4×33.85×42.4(900 860 315mm) 23.2 (590mm)	13.1 (333mm)
37.2×31.9×45.55(945 810 395mm) 25.2 (640mm) 15.95 (405mm)
38.98×38×13.58(990 965 345mm)	24.58 (624mm) 14.4 (366mm)
36.93×53.9×15.43(938 1869 392mm)	24.90 (634mm) 15.9 (404mm)
35.4×46×13.8(900 1170 380mm)	23.2 (590mm)	14.88 (373mm)
31.5×21.8×13.1(800 854 383mm) 20.24 (514mm)	13.39 (340mm)
33.27×27.6×44.3(845 702 383mm)	21.26 (540mm) 13.8 (350mm)
37.24×31.9×16.53(946 810 480mm)	26.5 (673mm) 15.87 (403mm)
37.24×31.9×16.14(946 810 490mm)	26.5 (673mm) 15.87 (403mm)
37.5×52.5×16.14(952 1333 490mm)	24.96 (634mm) 15.9 (404mm)
37.5×52.5×16.34(952 1333 495mm)	24.96 (634mm) 15.9 (404mm)
35×26.5×13.46(890 673 342mm)	26.1 (663mm) 13.94 (354mm)
30.1×21.8×11.9(765 855 363mm)	17.8 (452mm)	11.3 (286mm)
31.7×21.8×12.9(805 854 380mm)	20.1 (511mm)	12.5 298 (317mm)
30.3×21.8×11.8(770 855 380mm)	19.2 (487mm)	11.7 (298mm)

Rows of series installation

The relations between H, A and L are as follows.

L		A
L ≤ H	L ≤ 1/2H	9.8° / 25 cm or more
	1/2H < L ≤ H	11.8° / 30 cm or more
L > H Can not be installed

REFRIGERANT PIPING CONNECTION

When connecting refrigerant piping, do not let substances or gases other than the specified refrigerant enter the unit. The presence of other gases or substances will lower the unit's capacity, and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and injury.

NOTE ON PIPE LENGTH

A minimum pipe run of 10' (3m) is required to minimize vibration & excessive noise.

Ensure that the length of the refrigerant pipe, the number of bends, and the drop height between the indoor and outdoor units meets the requirements shown in the following table:

The Maximum Length and Drop Height Based on Models

Capacity (BTU/h) Length of Piping (ft) Max. Drop Height (ft)
< 15K	82(25m)	32.8(10m)
≥ 15K - < 24K	98.4(30m)	65.6(20m)
≥ 24K - < 36K	164(50m)	82(25m)
≥ 36K - < 60K	246(75m)	98.4(30m)

CAUTION

OIL TRAPS

If oil flows back into the outdoor unit's

compressor, this might cause liquid compression or deterioration of oil return. Oil traps in the rising gas piping can prevent this.

An oil trap should be installed every 20ft (6m) of vertical suction line riser (<36000Btu/h unit).

An oil trap should be installed every 32.8ft (10m) of vertical suction line riser (≥36000Btu/h unit).

graph TD
    A["Indoor unit/Outdoor unit"] --> B["Gas piping"]
    B --> C["Inlet pipe"]
    C --> D["8m/20l: < 36000Btu/h until 10m/32.8lt, ≥36000Btu/h unit?"]
    B --> E["Liquid piping"]
    E --> F["8m/20l: < 36000Btu/h until 10m/32.8lt, ≥36000Btu/h unit?"]

REFRIGERANT PIPING CONNECTION

(Continued)

CONNECTION INSTRUCTIONS - REFRIGERANT PIPING

CAUTION

• The branching pipe must be installed horizontally. An angle of more than 10° may cause malfunction.
• DO NOT install the connecting pipe until both indoor and outdoor units have been installed.
  • Insulate both the gas and liquid piping to prevent water leakage.

STEP 1: CUT PIPES

When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure efficient operation and minimize the need for future maintenance.

1 Measure the distance between the indoor and outdoor units.
2 Using a pipe cutter, cut the pipe a little longer than the measured distance.
3 Make sure that the pipe is cut at a perfect 90° angle.

DO NOT DEFORM PIPE WHILE CUTTING

Be extra careful not to damage, dent, or deform the pipe while cutting. This will drastically reduce the heating efficiency of the unit.

STEP 2: REMOVE BURRS

Burrs can affect the air-tight seal of refrigerant piping connection. They must be completely removed.

1 Hold the pipe at a downward angle to prevent burrs from falling into the pipe.

2 Using a reamer or deburring tool, remove all burrs from the cut section of the pipe.

STEP 3: FLARE PIPE ENDS

Proper flaring is essential to achieve an airtight seal.

1 After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe.
2 Sheath the pipe with insulating material.
Place flare nuts on both ends of pipe. Make sure they are facing in the right direction, because you can't put them on or change their direction after flaring.

4 Remove PVC tape from ends of pipe when ready to perform flaring work.

5 Clamp flare form on the end of the pipe. The end of the pipe must extend beyond the flare form.

Place flaring tool onto the form.

REFRIGERANT PIPING CONNECTION

(Continued)

7 Turn the handle of the flaring tool clockwise until the pipe is fully flared. Flare the pipe in accordance with the dimensions.

PIPING EXTENSION BEYOND FLARE FORM

Outer Diameter of A (in)

Pipe (In) Min. Max.

∅ 0.25 (∅ 6.35mm) 0.0275 (0.7mm) 0.05 (1.3mm)

∅ 0.375 (∅ 9.52mm) 0.04 (1.0mm) 0.063 (1.6mm)

∅ 0.5 (∅ 12.7mm) 0.04 (1.0mm) 0.07 (1.8mm)

∅ 0.63 (∅ 16mm) 0.078 (2.0mm) 0.086 (2.2mm)

∅ 0.75 (∅ 19mm) 0.078 (2.0mm) 0.094 (2.4mm)

TORQUE REQUIREMENTS

Outer Diameter of Pipe (in)	Tightening Torque	Flare shape
0.25 ( 6.35mm)	13 - 15 ft-lbs
0.375 ( 9.52mm)	23 - 29 ft-lbs
0.5 ( 12.7mm)	36 - 43 ft-lbs
0.63 ( 16mm)	42 - 52 ft-lbs
0.75 ( 19mm)	49 - 74 ft-lbs

DO NOT USE EXCESSIVE TORQUE

Excessive force can break the nut or damage the refrigerant piping. You must not exceed torque requirements shown in the table above.

8 Remove the flaring tool and flare form, then inspect the end of the pipe for cracks and oven flaring.

STEP 4: CONNECT PIPES

Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit. You should first connect the low-pressure pipe, then the high pressure pipe.

When connecting the flare nuts, apply a thin coat of refrigeration oil to the flared ends of the pipes.

2 Align the center of the two pipes that you will connect.

3 Tighten the flare nut as tightly as possible by hand.
4 Using a spanner, grip the nut on the unit tubing.
5 While firmly gripping the nut, use a torque wrench to tighten the flare nut according to the torque values in above table.

NOTE: Torque from tightening the flare nut can snap off other parts of valve.

CAUTION

• Ensure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
  • Make sure the pipe is properly connected. Over tightening may damage the bell mouth and under tightening may lead to leakage.

(Continued)

NOTE ON MINIMUM BEND RADIUS

Carefully bend the tubing in the middle according to the diagram below. DO NOT bend the tubing more than 90° or more than 3 times.

Bend the pipe with thumb

min-radius 3.9" (10cm)

6 After connecting the copper pipes to the indoor unit, wrap the power cable, signal cable and the piping together with binding tape.

NOTE: DO NOT intertwine signal cable with other wires. While bundling these items together, do not intertwine or cross the signal cable with any other wiring.

7 Thread this pipeline through the wall and connect it to the outdoor unit.
8 Insulate all the piping, including the valves of the outdoor unit.
9 Open the stop valves of the outdoor unit to start the flow of the refrigerant between the indoor and outdoor unit.

CAUTION

Check to make sure there is no refrigerant leak after completing the installation work. If there is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the Air Evacuation section of this manual).

WIRINGREFRIGERANT PIPING CONNECTION

BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE REGULATIONS

1 All wiring must comply with local and national electrical codes, regulations and must be installed by a licensed electrician.
2 All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the indoor and outdoor units.
3 If there is a serious safety issue with the power supply, stop work immediately. Explain your reasoning to the client, and refuse to install the unit until the safety issue is properly resolved.
4 Power voltage should be within 90-110% of rated voltage. Insufficient power supply can cause malfunction, electrical shock, or fire.
5 If connecting power to fixed wiring, a surge protector and main power switch should be installed.
6 If connecting power to fixed wiring, a switch or circuit breaker that disconnects all poles and has a contact separation of at least 1/8in (3mm) must be incorporated in the fixed wiring. The qualified technician must use an approved circuit breaker or switch.
7 Only connect the unit to an individual branch circuit outlet. Do not connect another appliance to that outlet.
8 Make sure to properly ground the air conditioner.
9 Every wire must be firmly connected. Loose wiring can cause the terminal to overheat, resulting in product malfunction and possible fire.
10 Do not let wires touch or rest against refrigerant tubing, the compressor, or any moving parts within the unit.
11 If the unit has an auxiliary electric heater, it must be installed at least 40in (1m) away from any combustible materials.

12 To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned off. After turning off the power, always wait 10 minutes or more before you touch the electrical components.
13 Make sure that you do not cross your electrical wiring with your signal wiring. This may cause distortion and interference.
14 The unit must be connected to the main outlet. Normally, the power supply must have a impedance of 32 ohms.
15 No other equipment should be connected to the same power circuit.
16 Connect the outdoor wires before connecting the indoor wires.

WARNING

BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM.

NOTE ON AIR SWITCH

When the maximum current of the air conditioner is more than 16A, an air switch or leakage protection switch with protective device shall be used (purchased separately). The appliance should be wired according to NEC and CEC requirements.

[A]

graph TD
    A["Air switch (purchased separately)"] --> B["Outdoor unit power wires"]
    B --> C["Outdoor unit"]
    C --> D["Indoor unit"]
    D --> E["Indoor & Outdoor connective wires (purchased separately)"]
    E --> F["Indoor unit"]

NOTE: The cographs are for explanation purpose only. Your machine may be slightly different. The actual shape shall prevail.

WIRING

(Continued)

OUTDOOR UNIT WIRING

WARNING

BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM.

Prepare the cable for connection a. You must first choose the right cable size. Be sure to use H07RN-F(14-4 AWG) cables.

NOTE: In North America, choose the cable type according to the local electrical codes and regulations.

CHOOSE THE RIGHT CABLE SIZE

The size of the power supply cable, signal cable, fuse, and switch needed is determined by the maximum current of the unit. The maximum current is indicated on the nameplate located on the side panel of the unit. Refer to this nameplate to choose the right cable, fuse, or switch.

NOTE: In North America, please choose the right cable size according to the Minimum Circuit Ampacity indicated on the nameplate of the unit.

b. Using wire strippers, strip the rubber jacket from both ends of the signal cable to reveal approximately 5.9" (15cm) of wire.

c. Strip the insulation from the ends.

d. Using a wire crimper, crimp u-lugs on the ends.

NOTE: When connecting the wires, strictly follow the wiring diagram found inside the electrical box cover.

2 Remove the electric cover of the outdoor unit. If there is no cover on the outdoor unit, take off the bolts from the maintenance board and remove the protection board.

3 Connect the u-lugs to the terminals Match the wire colors/labels with the labels on the terminal block. Firmly screw the u-lug of each wire to its corresponding terminal.
4 Clamp down the cable with the cable clamp.
5 Insulate unused wires with electrical tape. Keep them away from any electrical or metal parts.
6 Reinstall the cover of the electric control box.

INDOOR UNIT WIRING

1 Prepare the cable for connection

a. Using wire strippers, strip the rubber jacket from both ends of the signal cable to reveal about 5.9"(15cm) of the wire.
b. Strip the insulation from the ends of the wires.
c. Using a wire crimper, crimp the u-lugs to the ends of the wires.
2 Open the front panel of the indoor unit. Using a screwdriver, remove the cover of the electric control box on your indoor unit.
3 Thread the power cable and the signal cable through the wire outlet.
Connect the u-lugs to the terminals. Match the wire colors/labels with the labels on the terminal block. Firmly screw the u-lug of each wire to its corresponding terminal. Refer to the Serial Number and Wiring Diagram located on the cover of the electric control box.

COMPACT MODELS

1. Control box lid
2. Wiring diagram label
3. Power supply
   terminal block
4. Clamp for wiring
5. Wiring between units
6. Plastic cover
7. Clamp (field supply)

CAUTION

• While connecting the wires, please strictly follow the wiring diagram.
• The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube.

5 Clamp down the cable with the cable clamp. The cable must not be loose or pull on the u-lugs.

6 Reattach the electric box cover.

AIR EVACUATION

PREPARATIONS AND PRECAUTIONS

Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage the air conditioner, reduce its efficiency, and cause injury. Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the system.

Evacuation should be performed upon initial installation and when unit is relocated.

BEFORE PERFORMING EVACUATION

☑ Check to make sure the connective pipes between the indoor and outdoor units are connected properly.
☑ Check to make sure all wiring is connected properly.

EVACUATION INSTRUCTIONS

1 Connect the charge hose of the manifold gauge to service port on the outdoor unit's low pressure valve.
2 Connect another charge hose from the manifold gauge to the vacuum pump.
3 Open the Low Pressure side of the manifold gauge. Keep the High Pressure side closed.
4 Turn on the vacuum pump to evacuate the system.
5 Run the vacuum for at least 15 minutes, or until the Compound Meter reads -10 Pa (-76cmHG).

6 Close the Low Pressure side of the manifold gauge, and turn off the vacuum pump.
7 Wait for 5 minutes, then check that there has been no change in system pressure.
8 If there is a change in system pressure, refer to Gas Leak Check section for information on how to check for leaks. If there is no change in system pressure, unscrew the cap from the packed valve (high pressure valve).
9 Insert hexagonal wrench into the packed valve (high pressure valve) and open the valve by turning the wrench in a 1/4 counterclockwise turn. Listen for gas to exit the system, then close the valve after 5 seconds.
10 Watch the Pressure Gauge for one minute to make sure that there is no change in pressure. The Pressure Gauge should read slightly higher than atmospheric pressure.

11 Remove the charge hose from the service port.
12 Using hexagonal wrench, fully open both the high pressure and low pressure valves.
13 Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. You may tighten it further using a torque wrench if needed.

OPEN VALVE STEMS GENTLY

When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to open further.

AIR EVACUATION

(Continued)

NOTE ON ADDING REFRIGERANT

Some systems require additional charging depending on pipe lengths. The standard pipe length varies according to local regulations. For example, in North America, the standard pipe length is 25' (7.5m). In other areas, the standard pipe length is 16' (5m). The refrigerant should be charged from the service port on the outdoor unit's low pressure valve. The additional refrigerant to be charged can be calculated using the following formula:

LIQUID SIDE DIAMETER

	1/4"(Φ6.35) 3/8"(9.52) 1/2"(12Φ7)		Φ
R410A:(orifice tube in the indoor unit):	(Total pipe length - standard pipe length)x0.32oZ(30g)/ft(m)	(Total pipe length - standard pipe length)x0.69oZ(65g)/ft(m)	(Total pipe length - standard pipe length)x1.23oZ(115g)/ft(m)
R410A:(orifice tube in the indoor unit):	(Total pipe length - standard pipe length)x0.16oZ(15g)/ft(m)	(Total pipe length - standard pipe length)x0.32oZ(30g)/ft(m)	(Total pipe length - standard pipe length)x0.69oZ(55g)/ft(m)

CAUTION

DO NOT mix refrigerant types.

PANEL INSTALLATION

CAUTION

DO NOT place the panel face down on the floor, against a wall, or on uneven surfaces.

3PAMSCH12 & 3PAMSCH18

STEP 1: REMOVE THE FRONT GRILLE

1 Push both of the tabs towards the middle simultaneously to unlock the hook on the grille.

2 Hold the grille at a 45° angle, lift it up slightly and detach it from the main body.

STEP 2: INSTALL THE PANEL

Align the indicate "△" on the decoration panel to the indicate "△" on the unit. Attach the decoration panel to the unit with the supplied screws as shown in figure below.

After installing the decoration panel, ensure that there is no space between the unit body and decoration panel. Otherwise air may leak through the gap and cause dewdrop. (See figure below)

STEP 3: MOUNT THE INTAKE GRILLE

Ensure that the buckles at the back of the grille be properly seated in the groove of the panel.

STEP 4: CONNECT WIRES

Connect the 2 wires of the decoration panel to the main board of the unit.

STEP 5: FASTEN CONTROL BOX LID

Fasten the control box lid with 2 screws.

STEP 6: CLOSE INTAKE GRILLE

Close the intake grille, and close the 2 grille hooks.

PANEL INSTALLATION

(Continued)

3PAMSCH24

STEP 1: REMOVE THE FRONT GRILLE

1 Push both of the tabs towards the middle simultaneously to unlock the hook on the grille.
Hold the grille at a 45° angle, lift it up slightly and detach it from the main body.

Remove the grid screws

Technical line drawing of a mechanical component with a 45° angle标注 (no text or symbols beyond the label)

STEP 2: REMOVE INSTALLATION COVERS

Remove the installation covers at the four corners by sliding them outwards.

STEP 3: INSTALL THE PANEL

Align the front panel to the main body, taking into account the position of the piping and drain sides. Hang the four latches of the decorative panel to the hooks of the indoor unit. Tighten the panel hook screws evenly at the four corners.

NOTE: Tighten the screws until the thickness of the sponge between the main body and the panel reduces to 0.2-0.3" (4-6mm). The edge of the panel should be in contact with the ceiling well.

Adjust the panel by turning it to the arrowed direction so that the ceiling opening is completely covered.

PANEL INSTALLATION

(Continued)

NOTE: If the height of the indoor unit needs to be adjusted, you can do so through the openings at the panel's four corners. Make sure that the internal wiring and drainpipe are not affected by this adjustment.

CAUTION

Failure to tighten screws can cause water leakage.

CAUTION

If the unit is not hung correctly and a gap exists, the unit's height must be adjusted to ensure proper function. The unit's height can be adjusted by loosening the upper nut, and adjusting the lower nut.

STEP 4: HANG THE INTAKE GRILLE

Hang the intake grille on the panel, and then connect the lead connectors of the louver motor and the control box on the panel to the corresponding connectors of the main body.

STEP 5: RE-INSTALLED INTO STYLE GRID

Re-installed into the style grid. Reinstall the installation cover. Fix the installation cover plate rope to the pillar of the installation cover plate, and gently press the installation cover plate into the panel.

When installing the cover, slide the four slide fasteners into the corresponding slots on the panel.

NOTE: After installation, the butt plugs of display, swing, water pump and other wire bodies must be placed in the electric control box.

TEST RUN

BEFORE TEST RUN

A test run must be performed after the entire system has been completely installed. Confirm the following points before performing the test:

a. Indoor and outdoor units are properly installed.
b. Piping and wiring are properly connected
c. No obstacles near the inlet and outlet of the unit that might cause poor performance or product malfunction.
d. Refrigeration system does not leak.
e. Drainage system is unimpeded and draining to a safe location.
f. Heating insulation is properly installed.
g. Grounding wires are properly connected.
h. Length of the piping and additional refrigerant stow capacity have been recorded.
i. Power voltage is the correct voltage for the air conditioner.

CAUTION

Failure to perform the test run may result in unit damage, property damage, or personal injury.

TEST RUN INSTRUCTIONS

1 Open both the liquid and gas stop valves.
2 Turn on the main power switch and allow the unit to warm up.
3 Set the air conditioner to COOL mode.
4 For the Indoor Unit
a. Ensure the remote control and its buttons work properly.
b. Ensure the louvers move properly and can be changed using the remote control.
c. Double check to see if the room temperature is being registered correctly.
d. Ensure the indicators on the remote control and the display panel on the indoor unit work properly.

e. Ensure the manual buttons on the indoor unit works properly.
f. Check to see that the drainage system is unimpeded and draining smoothly.
g. Ensure there is no vibration or abnormal noise during operation.

5 For the Outdoor Unit

a. Check to see if the refrigeration system is leaking.

b. Make sure there is no vibration or abnormal noise during operation.

c. Ensure the wind, noise, and water generated by the unit do not disturb your neighbors or pose a safety hazard.

6 Drainage Test

a. Ensure the drainpipe flows smoothly. New buildings should perform this test before finishing the ceiling.
b. Remove the test cover. Add 2,000ml of water to the tank through the attached tube.
c. Turn on the main power switch and run the air conditioner in COOL mode.
d. Listen to the sound of the drain pump to see if it makes any unusual noises.
e. Check to see that the water is discharged. It may take up to one minute before the unit begins to drain depending on the drainpipe.
I. Make sure that there are no leaks in any of the piping.
g. Stop the air conditioner. Turn off the main power switch and reinstall the test cover.

NOTE: If the unit malfunctions or does not operate according to your expectations, please refer to the Troubleshooting section of the Owner's Manual before calling customer service.

5401 Dansher Road

Countryside, IL 60525

844-4PA-AIRE | 844-472-2473 | [e-mail]

CANADA SUPPORT 877-997-2473|[e-mail]

www.perfectaire.us