MM-A0280HX - Microwaves TOSHIBA - Free user manual and instructions

USER MANUAL MM-A0280HX TOSHIBA

Installation Instructions

Air Conditioner - Multi Split Type System

GB

Instructions

Airconditioning - Multi-delig Type System

Contents

Introduction 4
Installation 9
Trial Operation 38
Troubleshooting 48
Environmental 64

F Passer à la page 65 pour dire le manuel d'installation en français.
Die deutsche Montageanleitung findsie auf Seite 127.
Por favor, vaya a la page 189 para seguir las instrucciones del manual de instalacion en lengua española.
Il manuale d'installazione italiano è a pagina 251.
NL Zie bladzijde 313 voor de Nederlandse Installatichandleiding.

Introduction

Contents

Precautions 5
Operating Conditions 6
Components 7
Metric/Imperial pipe conversion 7

Introduction

Precautions

Please read these instructions carefully before starting the installation.
This equipment should only be installed by suitably trained operatives.
In all cases ensure safe working practice: Observe precautions for persons in the vicinity of the works.
Ensure that all local, national and international regulations are satisfied.
Check that the electrical specifications of the unit meet the requirements of the site.
Carefully unpack the equipment, check for damage or shortages. Please report any damage immediately.

These units comply with EC Directive:

73/23/EEC (Low Voltage Directive) and 89/336/EEC (Electro Magnetic Compatibility).

Accordingly, they are designated for use in commercial and industrial environments.

Avoid installation in the following locations:

Where the water drainage may cause a nuisance or a hazard when frozen.
Where there is a danger of flammable gas leakage.
Where there are high concentrations of oil.
Where the atmosphere contains an excess of salt (as in coastal areas). Special maintenance is required to maintain product design life.
Where the airflow from the outdoor unit may cause annoyance.
Where the operating noise of the outdoor unit may cause annoyance.
Where the foundation is not strong enough to fully withstand the weight of the outdoor unit.
Where strong winds may blow against the air inlet of the outdoor unit.

Precautions for R407C Systems

R407C outdoor units use synthetic oils which are extremely hygroscopic. Therefore ensure that the refrigerant system is NEVER exposed to air or any form of moisture.
Mineral oils are unsuitable for use in these units and may lead to premature system failure.
Use only equipment which is suitable for use with R407C. Never use equipment which has been used with R22.
R407C should only be charged from the service cylinder in the liquid phase. It is advisable to use a gauge manifold set equipped with a liquid sight glass fitted in the centre (entry) port.

Introduction

Operating Conditions

Outdoor Temperature	-5 ~ 43°C	Cooling
	-15 ~ 21°C	Heating
Room Temperature	18 ~ 32°C	Cooling
	15 ~ 29°C	Heating
Room Humidity	<80%	Cooling

1. Allocation standard of Model name

OUTDOOR

MM-A0280HT

Maaannnnnne aannnnnne annnnnne

A - Outdoor

0280 - 28.0kW (10HP)

0224 - 22.4kW (8HP)

0160 - 16.0kW (6HP)

C - Cooling

H - Heating

T-Inverter

X - Fixed Speed

INDOOR

MM-TU056

Maaannnnnne aannnnnne

B Built-In Duct Type

C (CR) - Ceiling Type (IR Remote)

K (KR) - High Wall Type (IR Remote)

N - Carcase Type

S (SR) - Low Wall Type (IR Remote)

SB - Built-In Slim Duct Type

TU - 2 Way Cassette Type

U - 4 Way Cassette Type

028 - 2.8kW (1HP)

042-4.2kW(1.5HP)

056 - 5.6kW (2HP)

080 - 8.0kW (3HP)

112-11.2kW (4HP)

140-14.0kW(5HP)

2. Range of combined units

No. of combined units

: 1 to 5 units

Capacity range

: Equivalent to 14HP (0384kW type) to 46HP (1288kW)

3. Restriction for combination units

(1) The Inverter Unit should have the maximum capacity among all units in that combination.
(2) The 6HP fixed-speed unit is available only with the combination of 14HP and 22HP. (It cannot be used for any other combination.)

4. Rated conditions

Cooling

: Indoor air temperature 27°C DB/19°C WB

Outdoor air temperature 35^ C DB/25°C WB

Heating

: Indoor air temperature 21°C DB/15.5°C WB

Outdoor air temperature 7^ C DB/6°C WB

5. Mode Priority

This Outdoor Unit is set to operate with the Heating mode taking precedence. This precidence can be switched between Heat and Cool mode using the DIP switch 07 on the Outdoor Unit Interface PCB (MCC-1343-01) as follows:

Heat Priority (factory set)

Cool Priority

Introduction

Components

1. Outdoor Unit

Corresponding HP	Inverter unit		Fixed-speed unit			Appearance
	8HP	10HP	6HP	8HP	10HP
Model name	MM-A0224HT	MM-A0280HT	MM-A0160HX	MM-A0224HX	MM-A0280HX
Cooling capacity (kW)	22.4	28.0	16.0	22.4	28.0
Heating capacity (kW)	25.0	31.5	18.0	25.0	31.5

2. Outdoor Units (Combination of Outdoor Units)

Corresponding HP		8HP	10HP	14HP	16HP	18HP	20HP	22HP	24HP	26HP	28HP	30HP	32HP	34HP	36HP	38HP	40HP	42HP	44HP	46HP
Combined Model MM-A~HT		0224	0280	0384	0440	0504	0560	0608	0672	0728	0784	0840	0896	0952	1008	1064	1120	1176	1232	1288
Cooling capacity (kW)		22.4	28.0	38.4	44.8	50.4	56.0	60.8	67.2	72.8	78.4	84.0	89.6	95.2	100.8	106.4	112.0	117.6	123.2	128.8
Combined outdoor units	Inverter unit	8HP	10HP	8HP	8HP	10HP	10HP	8HP	8HP	10HP	10HP	10HP	8HP	10HP	10HP	10HP	10HP	10HP	10HP	10HP
	Fixed-speed unit	—	—	6HP	8HP	8HP	10HP	8HP	8HP	8HP	10HP	10HP	8HP	8HP	10HP	10HP	10HP	8HP	10HP	10HP
		—	—	—	—	—	—	6HP	8HP	8HP	8HP	10HP	8HP	8HP	8HP	10HP	10HP	8HP	8HP	10HP
		—	—	—	—	—	—	—	—	—	—	—	8HP	8HP	8HP	8HP	10HP	8HP	8HP	8HP
		—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	8HP	8HP	8HP
No. of connectable indoor units		13	16	16	18	18	20	22	24	26	28	30	32	34	36	38	40	40	40	40
Min. HP Connection		4	5	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Max. HP Connection		10.8	13.5	18.9	21.6	24.3	27	29.7	32.4	35.1	37.8	40.5	43.2	45.9	48.6	51.3	54	56.7	59.4	62.1

Metric/Imperial pipe conversion

Diameter (mm)	6.4	9.5	12.7	15.9	19.0	22.0	28.6	34.9	41.3	54.1
Nominal Diameter (inch)	1/4	3/8	1/2	5/8	3/4	7/8	1 1/8	1 3/8	1 5/8	2 1/8

Note: 1.0MPaG = 10.2kgf/cm^2G

Introduction

Components

1. Indoor Unit

Type	Appearance	Model name	Capacity code/HP	Cooling Capacity(kW)	Heating Capacity(kW)
4 Way Cassette Type 'U'		MM-U056	2	5.6	6.4
		MM-U080	3	8.0	9.6
		MM-U112	4	11.2	12.8
		MM-U140	5	14.0	15.8
2 Way Cassette Type 'TU'		MM-TU028	1	2.8	3.2
		MM-TU042	1.5	4.2	4.8
		MM-TU056	2	5.6	6.4
Built-In Slim Duct Type 'SB'		MM-SB028	1	2.8	3.2
Built-In Slim Duct, Type 'B'		MM-B056	2	5.6	6.4
		MM-B080	3	8.0	9.6
		MM-B112	4	11.2	12.8
		MM-B140	5	14.0	15.8
Ceiling Type 'C'		MM-C/CR042	1.5	4.2	4.8
		MM-C/CR056	2	5.6	6.4
		MM-C/CR080	3	8.0	9.6
		MM-C/CR112	4	11.2	12.8
		MM-C/CR140	5	14.0	15.8
High Wall Type 'K'		MM-K/KR042	1.5	4.2	4.8
		MM-K/KR056	2	5.6	6.4
		MM-K/KR080	3	8.0	9.6
Carcase Type 'N'		MM-N028	1	2.8	3.2
		MM-N042	1.5	4.2	4.8
		MM-N056	2	5.6	6.4
		MM-N080	3	8.0	9.6
Low Wall Type 'S'		MM-S/SR056	2	5.6	6.4
		MM-S/SR080	3	8.0	9.6

Contents

Outdoor Unit

Transportation of the Outdoor Unit 10
Installation of Outdoor Unit 11
Dimensional Drawings Outdoor Unit 12
Dimensional Drawings Two Units Connected 13
Dimensional Drawings Three Units Connected 14
Dimensional Drawings Four Units Connected 15
Dimensional Drawings Five Units Connected 16
Multiple Installation on the Rooftop 17

Piping

Free Branching System 19
Connecting Refrigerant Pipes 20
Permissible Length/Height Separation of Refrigerant Piping . . . . . .21
Selection of Refrigerant Piping and Charge Requirement 22
Branch Headers/Branch Joints (Accessories) 24
Branch Header/T-shape Branch Joint 25
Connecting the Branching Kit/Y-shape Branching Joint 26
Heat Insulating the Branching Pipes/Branching Header 27
T-shape Branching Joint - to Connect Outdoor Units 29
Installation of Gas/Liquid Branching Pipes. 30
Airtight Test 31
Leak Position Check/Air Purge 32
Calculating the Additional Refrigerant Required 33
Additional Charge Amounts 34

Wiring

General/Wiring System Overview 35
Connecting Power Source Cable/Control Cable 36
Control Wiring Overview 37

Transportation of the Outdoor Unit

Fork Lift

• Front Access - insert the forks into the slots on the fixing legs.
• Side Access - see diagram.

Crane

• Check the suitability of the lifting rope (see table).
• Secure lifting rope through transportation slot.
• Protect the unit where rope contact could scratch or deform it.

Model	Weight
MM-A0280HT	284.0kg
MM-A0224HT	282.0kg
MM-A0280HX	280.0kg
MM-A0224HX	278.0kg
MM-A0160HX	204.0kg

Installation of Outdoor Unit

1. Align the outdoor units at intervals of 20mm or more.

Fix the outdoor units with M12 anchor bolts. (4 positions per unit.)

Anchor bolt with 20mm length is suitable.

• Anchor bolt pitch is as shown in the following figure.

• However, the equivalent pipe length between the nearest outdoor unit and farthest outdoor unit of the refrigerating cycle system should not exceed 20m .
• When routing the refrigerant piping through the base, the fixing height of the base (two-divided foundations) must be 500m or more.

1. Correct foundation mounts for supporting the Outdoor unit:

Note: The leading outdoor unit to be connected to the main refrigerant piping for the indoor units must be an inverter unit.

Dimensional Drawings

Outdoor Unit

Model Name:

MM-A0280HT, MM-A0224HT, MM-A0280HX, MM-A0224HX, MM-A0160HX

Base bolt position

Note: All dimensions in (mm)

Model	ØA mm	ØB mm	ØC mm
MM-A0280HT, MM-A0280HX	28.6	12.7	9.52
MM-A0224HT, MM-A0224HX	22.2	12.7	9.52
MM-A0160HX	22.2	9.52	9.52

Dimensional Drawings

Two Units Connected

Model Name:

MM-A0384HT, MM-A0440HT, MM-A0504HT, MM-A0560HT

No.	Name
①	Outdoor Unit (Inverter type)
②	Outdoor Unit (Fixed-speed type)

Note: All dimensions in (mm)

Dimensional Drawings

Three Units Connected

Model Name:

MM-A0608HT, MM-A0672HT, MM-A0728HT, MM-A0784HT, MM-A0840HT

Note: All dimensions in (mm)

No.	Name
①	Outdoor Unit (Inverter type)
②	Outdoor Unit (Fixed-speed type 1)
③	Outdoor Unit (Fixed-speed type 2)

Dimensional Drawings

Four Units Connected

Model Name:
MM-A0896HT, MM-A0952HT, MM-A1008HT, MM-A1064HT, MM-A1120HT

Note: All dimensions in (mm)

No.	Name
①	Outdoor Unit (Inverter type)
②	Outdoor Unit (Fixed-speed type 1)
③	Outdoor Unit (Fixed-speed type 2)
④	Outdoor Unit (Fixed-speed type 3)

Dimensional Drawings

Five Units Connected

Model Name:
MM-A1176HT, MM-A1232HT, MM-A1288HT

Note: All dimensions in (mm)

No.	Name
①	Outdoor Unit (Inverter type)
②	Outdoor Unit (Fixed-speed type 1)
③	Outdoor Unit (Fixed-speed type 2)
④	Outdoor Unit (Fixed-speed type 3)
⑤	Outdoor Unit (Fixed-speed type 4)

Multiple Installation on the Rooftop

When the Outer Wall is Higher than the Outdoor Unit

If a hole can be made in the wall:

1. Set an aperture ratio so that suction air volume Vs from the hole becomes 1.5m / s or less.
2. Height of discharge duct: HD = H - h

If a hole cannot be made:

1. Set a base with 500 to 1,000mm height.
2. Height of discharge duct: HD = H - h

Note: All dimensions in (mm)

When the Outer Wall is Lower than the Outdoor Unit

1-line installation

2-parallel lines installation

3-parallel lines installation

• When refrigerant piping is routed from the front of the unit, distance between Outdoor Unit and Connecting piping must be 500mm or more.

Note: All dimensions in (mm)

Free Branching System

The following five branching systems are available to increase the flexibility of refrigerant piping design.

Line branching system

2 Header branching system

3 Header branching system after line branching

Line branching system after header branching

WARNING!

During installation – if the refrigerant gas leaks, ventilate the room. After installation – check for gas leakages.

If refrigerant gas comes into contact with fire – noxious gas may result!

Connecting Refrigerant Pipes

1. To access the refrigerant piping connections and electrical wiring terminals, remove the 7xM5 securing bolts in the front panel. To remove the panel, lift it up and away from its hanging tabs - See diagram.
2. The refrigerant pipes can be routed forwards, downwards or sideways.
3. If the pipes are routed forwards, make sure they exit through the Piping/Wiring Panel - (remove knock out section) and allow at least 500mm between the Outdoor Unit and the main pipe connecting it to the Indoor Unit. This is for servicing access. (Replacing the compressor, for example, requires a space of at least 500mm.)
4. If the pipes are routed downwards, remove the knockout section in the baseplate of the Outdoor Unit. This will enable access. They can then be connected to the left or right, or the rear side. (Leading pipe of the balancing should be within 4m.)

Notes:

1. When brazing, use nitrogen. This prevents internal oxidisation of the pipes.
2. Always use clean new pipe, and ensure it is not contaminated by water or dust.
3. Always use a double spanner on the flare nut - and tighten to the specified torque: (see table).

Note: All dimensions in (mm)

Connecting pipe outer dia. (mm)	Tightening torque (Nm)	Re-tightening torque (Nm)
Ø6.4	11.8 (1.2kgf m)	13.7 (1.4kgf m)
Ø9.5	24.5 (2.5kgf m)	29.4 (3.0kgf m)
Ø12.7	49.0 (5.0kgf m)	53.9 (5.5kgf m)
Ø15.9	78.4 (8.0kgf m)	98.0 (10.0kgf m)
Ø19.0	98.0 (10.0kgf m)	117.7 (12.0kgf m)

Permissible Length/Height Separation of Refrigerant Piping

System Restrictions

Notes: Combination of Outdoor Units: Inverter Unit + Fixed-speed Unit (0 to 4 units).

Combination of Fixed-speed Units without Inverter Unit is not permissible.

The Inverter Unit is the master Outdoor Unit and is directly connected to the indoor distribution pipe.

Install the Outdoor Units in order of capacity.

(Inverter Unit≥ Fixed-speed Unit 1 > Fixed-speed Unit 2 > Fixed-speed Unit n).

Max. No. of combined outdoor units		5 units
Max. capacity of combined outdoor units		128.8kW/46HP
Max. No. of connected indoor units		40 units
Max. capacity of combined indoor units	H2≤ 15	135%
	H2>15	105%

			Allowable value	Piping section
Piping length	Total extension of pipe (Liquid pipe, real length)		250m	LA + LB + La + Lb + Lc + Ld + L1 + L2 + L3 + L4 + L5 + L6 + L7 + a + b + c + d + e + f + g + h + i + j
	Farthest piping length L (*)	Real length	100m	LA + LB + Ld + L1 + L3 + L4 + L5 + L6 + j
		Equivalent length	125m
	Equivalent length of farthest piping from 1st branching Li (*)		50m	L3 + L4 + L5 + L6 + j
	Equivalent length of farthest piping between outdoor units LO (*)		20m	LA + LB + Ld, LA + Lb, LA + LB + Lc
	Max. equivalent length of outdoor unit connecting piping		10m	Ld, La, Lb, Lc
Height difference	Height between indoor and outdoor units H1	Upper outdoor unit	50m	—
		Lower outdoor unit	30m	—
	Height between indoor units H2		30m	—
	Height between outdoor units H3		4m	—

^*(d) is Outdoor Unit farthest from branching and (j) is Indoor Unit farthest from 1st branching.

Selection of Refrigerant Piping and Charge Requirement

Pipe Size of Outdoor Unit

kW	HP	Model name	Gas side	Liquid side
16.0	6	MM-A0160HX	Ø22.2	Ø9.5
22.4	8	MM-A0224HT, MM-A0224HX	Ø22.2	Ø12.7
28.0	10	MM-A0280HT, MM-A0280HX	Ø28.6	Ø12.7

2 Connecting Pipe Size Between Outdoor Units

Total capacity code of outdoor units	Gas side	Liquid side	Balance pipe
Below 16	Ø28.6	Ø15.9	Ø9.5
16 to Below 20	Ø34.9	Ø15.9	Ø9.5
20 to Below 26	Ø41.3	Ø19.0	Ø9.5
26 to Below 32	Ø41.3	Ø22.2	Ø9.5
32 or more	Ø54.1	Ø22.2	Ø9.5

3 Size of Main Pipe

Total capacity code of all outdoor units	Gas side	Liquid side
Below 10	Ø22.2	Ø12.7
10 to Below 14	Ø28.6	Ø12.7
14 to Below 20	Ø34.9	Ø15.9
20 to Below 26	Ø41.3	Ø19.0
26 to Below 32	Ø41.3	Ø22.2
32 or more	Ø54.1	Ø22.2

4 Size Between Branching Sections

Total capacity code of indoor units downstream (*1)	Gas side	Liquid side
Below 4.0	Ø15.9	Ø9.5
4.0 to Below 6.4	Ø19.0	Ø9.5
6.4 to Below 13.2	Ø22.2	Ø12.7
13.2 to Below 19.2	Ø34.9	Ø15.9
19.2 to Below 25.2	Ø41.3	Ø19.0
25.2 to Below 31.2	Ø41.3	Ø19.0
31.2 or more	Ø54.1	Ø22.2

Piping

5 Piping of Indoor Unit

Unit	Gas side (*4)	Liquid side
028 type to 056 type	Ø12.7	Ø 6.4
080 type	Ø15.9	Ø 9.5
112 type to 140 type	Ø19.0	Ø 9.5

i.e. MM-SB028 = Gas 12.7 , Liquid 6.4

6 Branching joints/headers

	Model name	Usage			Appearance
Y-shape branching joint	RBM-Y018	Indoor unit capacity code (*1): Total below 6.4			-
	RBM-Y037	Indoor unit capacity code (*1): Total 6.4 or more and below 13.2 (*2)
	RBM-Y071	Indoor unit capacity code (*1): Total 13.2 or more and below 25.2 (*2)
	RBM-Y129	Indoor unit capacity code (*1): Total 25.2 or more (*2)
4-branching header (*3)	RBM-H4037	Indoor unit capacity code (*1): Total below 13.2		Max. 4 branches	-
	RBM-H4071	Indoor unit capacity code (*1): Total 13.2 or more and below 25.2
8-branching header (*3)	RBM-H8037	Indoor unit capacity code (*1): Total below 13.2		Max. 8 branches
	RBM-H8071	Indoor unit capacity code (*1): Total 13.2 or more and below 25.2
T-shape branching joint (For connection of outdoor unit)	RBM-T129	1 set of 3 types of T-shape joint pipes as described below: The required quantity is arranged and they are combined at the site.
		Connecting pipe	Corresponding dia. (mm)	Qty
		Balancing pipe	Ø9.52	1
		Piping at liquid side	Ø12.7 to Ø22.2	1
		Piping at gas side	Ø22.2 to Ø54.1	1

7 Additional Refrigerant Amount

Liquid pipe size	Additional refrigerant amount for liquid pipe 1m (kg)
Ø6.4	0.030
Ø9.5	0.065
Ø12.7	0.115
Ø15.9	0.190
Ø19.0	0.290
Ø22.2	0.420

() Code is determined according to the capacity code of the Indoor Units connected. For details, refer to the Introduction section in this manual.
(^2) If the total capacity code value of Indoor Units exceeds that of Outdoor Units, apply the capacity code of Outdoor Units.
() When using a branch header, Indoor Units with a maximum of 6.0 capacity code in total can be connected to each branch.
(4) If the length of the gas pipe exceeds 30m from the 1st branching to an Indoor Unit, increase the Gas pipe section by 1 size, i.e. MM-U140 = Gas Ø22.2, Liquid Ø9.5.

Branch Headers/Branch Joints (Accessories)

Y-shape Branch Joint

RBM-Y018
[Gas side]

[Liquid side]

RBM-Y037
[Gas side]

[Liquid side]

RBM-Y071
[Gas side]

[Liquid side]

RBM-Y129
[Gas side]

[Liquid side]

Note:

This additional connecting pipe is used if the gas pipe size is 041.3 or less. When brazing, the minimum insertion margin is 15mm .

Note: All dimensions in (mm)

Branch Header

Note: Pipe dia. shown indicates dia. of pipe to be connected.

RBM-H4037
[Gas side]

[Liquid side]

RBM-H8037
[Gas side]

[Liquid side]

RBM-H4071
[Gas side]

[Liquid side]

RBM-H8071
[Gas side]

[Liquid side]

T-shape Branch Joint

RBM-T129
[Gas side]
[Liquid side]
[Balance side]

Note: All dimensions in (mm)

Piping

Connecting the Branching Kit

Y-shape Branching Joint

Y-shape Branching Joint for gas and liquid distribution

When the selected pipe size differs from the size of the y-shape branching joint pipe, cut the centre of the connecting section with a pipe cutter, as shown below.

• Use the attached auxiliary pipe to adjust the pipe dia. of the Y-shape branching joint at gas or liquid side (RBM-Y071, RBM-Y129). Cut the branched pipe and auxiliary pipe to the specified size, and then braze.

Y-shape Joint for gas and liquid distribution

• Install Y-shape branching joint so that it branches horizontally or vertically.

• Be sure to fit the insulation to the Y-shape branching joint supplied in the kit.
  Cutting position

Cut the pipe at the centre of each connecting section, and remove burr.

Note: All dimensions in (mm)

Piping

Heat Insulating the Branching Pipes

Ensure the pipe insulation covers the piping up to the brazed accessory joints, as this will eliminate ingress of water - tape the pipe insulation to a thickness of 10mm or more, as shown.

RBM-Y129 (Gas side) (Prepared at site)
RBM-Y071 (Gas side, Liquid side),
RBM-Y129 (Liquid side)

Use insulator with a heat resistance of 120^ or over for gas pipes. To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over - or a machined insulation portion, as shown.

After the heat insulating, tape to seal.

Branching Header

When the selected pipe size prepared at site differs from the size of the branching header pipe, cut the centre of the connecting section with a pipe cutter as shown.

If the number of Indoor Units to be connected is less than the number of connections on the Branching Header, braze a pipe cap to the unused connectors.

Piping

• Install the branching header so that it branches horizontally. DO NOT install vertically.

Gas side

• Be sure to insulate the branching header with the insulation provided.
• When routing the branching header at the liquid side from the opposite side, cut both ends and use a pipe cap (not supplied), as shown.

• Support of branching header

Set a hanging metal support (prepared at site) for the branching header, after fitting heat insulation.

• Cutting position

Cut the centre of each connecting section, and remove burr.

Use a mini-cutter to cut branching headers up to 22.2.

Notes:

1. Make sure there's a straight run of pipe at least 300mm long at the inlet side of Y-shaped Branching Joints and Branching Headers.
2. Install Y-shaped Branching Joint so they branch horizontally or vertically. In horizontal installations, set within ± 30^ .
3. Install Branching Headers so they branch horizontally.
4. Do not use T-shaped Branching Joints for Branching Sections.
5. When using Y-Branches or Header Branches to prevent incorrect piping, attach a line number or name to each pipe.

Note: All dimensions in (mm)

T-shape Branching Joint - to Connect Outdoor Units

Branching Pipes at Gas Side/Liquid Side

• Use the included connecting pipes for gas/liquid sides to match to the appropriate pipe size. (The diagram shows a connecting example.)

Cut the centre

• Cutting position of connecting pipe

When the selected pipe size prepared at site differs from the size of the Branching Pipe, cut the centre of the connecting section with a pipe cutter.

Installation of Gas/Liquid Branching Pipes

Balancing Branch Pipes (Oil)

When combining two units, connect directly.

Heat Insulation

Insulate liquid side, gas side and Balancing Pipes separately.

Use insulator with a resistance of 120^ + for gas pipes.

To insulate the Branching Pipes, use a T-Shaped Joint cover with a thickness of 10mm or over – or the machined one included. (Insulation for branching is not included.)

To prevent condensation or dripping – seal the Branching Pipe securely, with no gaps.

Airtight Test

Carry out an airtight test after the refrigerant piping is complete. For an airtight test, connect a nitrogen gas bottle as shown, and apply pressure.

• Be sure to carry out the test from the service ports of the packed valves at both the gas side and balance side.
• Complete the airtight test on the service ports at liquid, gas and balance sides of the Inverter Outdoor Unit ONLY.
• Keep all of the valves at gas, liquid and balance sides fully closed. Nitrogen may enter the cycle of the Outdoor Unit. Therefore, re-tighten the valve rod before applying pressure. (For all valves at gas, liquid and balance sides.)
• For each refrigerant line, apply pressure gradually at gas, liquid and balance sides.

Be sure to apply pressure at gas, liquid and balance sides.

Never use oxygen, or a flammable noxious gas.

To detect a large leakage

STEP 1: 0.3MPa (3.0kg / cm^2G) Apply pressure for 3 minutes or more

STEP 2: 1.5 MPa ( 15 ~kg / cm^2 G) Apply pressure for 3 minutes or more

To detect a fine leakage

STEP 3: 3.0MPa (30kg / cm^2G) Apply pressure for 24 hours

• Check for a reduction in pressure.

If there is no reduction in pressure this is acceptable.

If there is a reduction in pressure check for leakage.

(Note: If there is a difference of ambient temp. between when the pressure was applied and 24 hours later, then pressure could change by approx. 0.01MPa (0.1kg / cm^2G) - so correct the pressure change.)

Note: All dimensions in (mm)

Leak Position Check

If a pressure drop is detected, check for leakage at connecting points. Locate the leakage by listening, feeling, using foaming agent etc. – then re-braze or re-tighten.

Air Purge

Using a vacuum pump, complete an air purge. Never use refrigerant gas.

After the airtight test, discharge the nitrogen gas.
- Connect a gauge manifold to the service port at liquid side, gas side and balance side, and connect a vacuum pump as shown.
- Be sure to vacuum at liquid, gas and balance sides.

• Use a vacuum pump with high vacuum carry-over degree (0.750mmHg or less) and large displacement (40L/min. or more).
• Perform vacuuming for 2 or 3 hours, though time depends on pipe length. Confirm that all packed valves at liquid, gas and balance sides are fully closed.
• If vacuum does not reach 0.750mmHg or less even after pumping for 2 hours or more, carry on for another hour. If it is still not reached even after 3 hours, check for leaks.
• When vacuum has reached 0.750mmHg or less after 2 hours or more, fully close valves VL and VH on the gauge manifold, stop the vacuum pump, leave for 1 hour, and then confirm the vacuum reading has not changed. If it has, there may be a leak – so carry out a full piping check.
• After the procedure has been completed, replace the vacuum pump with a refrigerant bottle and add the refrigerant.

Adding the Refrigerant

After the airtight test, replace the vacuum pump with a refrigerant bottle to charge the system.

Calculating the Additional Refrigerant Required

The refrigerant amount at shipment does not include the refrigerant needed for the piping - so first calculate this amount, and then add it.

Refrigerant charge amount shipped from the factory

Outdoor Unit Model name MM-	A0224HT	A0280HT	A0160HX	A0224HX	A0280HX
Charging amount (kg)	15.5	17.0	5.0	7.0	9.0

The amount of additional refrigerant is calculated from the size of the liquid pipe, and its real length.

Additional refrigerant charge amount at site =

Real length of liquid pipe x Additional refrigerant charge amount per liquid pipe 1m.

Example:

Additional charge amount R (kg) = (L1 × 0.030kg/m) + (L2 × 0.065kg/m) + (L3 × 0.115kg/m)

L1: Real total length of liquid pipe 6.4 (m)
L2: Real total length of liquid pipe 9.5 (m)
L3: Real total length of liquid pipe 12.7 (m)

Pipe dia. at liquid side	Additional refrigerant amount/1m
Ø6.4	0.030kg
Ø9.5	0.065kg
Ø12.7	0.115kg
Ø15.9	0.190kg
Ø19.0	0.290kg
Ø22.2	0.420kg

Charging the System

• Keeping the Outdoor Unit valve closed, charge the refrigerant from the service port on the liquid side.
• If the specified amount of refrigerant cannot be charged - fully open the Outdoor Unit's valves on the liquid, gas and balance sides, then perform the cooling operation with the valve at the gas side slightly closed.
• If leaks cause a shortage of refrigerant – recover the refrigerant from the system, and recharge with new refrigerant to the total refrigerant charge.

Note: All dimensions in (mm)

Piping

Additional Charge Amounts

Pipe Length	Liquid Pipe Diameter (mm)
(m)	Ø6.4	Ø9.5	Ø12.7	Ø15.9	Ø19.0	Ø22.2
1	0.030	0.065	0.115	0.190	0.290	0.420
2	0.060	0.130	0.230	0.380	0.580	0.840
3	0.090	0.195	0.345	0.570	0.870	1.260
4	0.120	0.260	0.460	0.760	1.160	1.680
5	0.150	0.325	0.575	0.950	1.450	2.100
6	0.180	0.390	0.690	1.140	1.740	2.520
7	0.210	0.455	0.805	1.330	2.030	2.940
8	0.240	0.520	0.920	1.520	2.320	3.360
9	0.270	0.585	1.035	1.710	2.610	3.780
10	0.300	0.650	1.150	1.900	2.900	4.200
11	0.330	0.715	1.265	2.090	3.190	4.620
12	0.360	0.780	1.380	2.280	3.480	5.040
13	0.390	0.845	1.495	2.470	3.770	5.460
14	0.420	0.910	1.610	2.660	4.060	5.880
15	0.450	0.975	1.725	2.850	4.350	6.300
16	0.480	1.040	1.840	3.040	4.640	6.720
17	0.510	1.105	1.955	3.230	4.930	7.140
18	0.540	1.170	2.070	3.420	5.220	7.560
19	0.570	1.235	2.185	3.610	5.510	7.980
20	0.600	1.300	2.300	3.800	5.800	8.400
21	0.630	1.365	2.415	3.990	6.090	8.820
22	0.660	1.430	2.530	4.180	6.380	9.240
23	0.690	1.495	2.645	4.370	6.670	9.660
24	0.720	1.560	2.760	4.560	6.960	10.080
25	0.750	1.625	2.875	4.750	7.250	10.500
26	0.780	1.690	2.990	4.940	7.540	10.920
27	0.810	1.755	3.105	5.130	7.830	11.340
28	0.840	1.820	3.220	5.320	8.120	11.760
29	0.870	1.885	3.335	5.510	8.410	12.180
30	0.900	1.950	3.450	5.700	8.700	12.600
31	0.930	2.015	3.565	5.890	8.990	13.020
32	0.960	2.080	3.680	6.080	9.280	13.440
33	0.990	2.145	3.795	6.270	9.570	13.860
34	1.020	2.210	3.910	6.460	9.860	14.280
35	1.050	2.275	4.025	6.650	10.150	14.700
36	1.080	2.340	4.140	6.840	10.440	15.120
37	1.110	2.405	4.255	7.030	10.730	15.540
38	1.140	2.470	4.370	7.220	11.020	15.960
39	1.170	2.535	4.485	7.410	11.310	16.380
40	1.200	2.600	4.600	7.600	11.600	16.800
41	1.230	2.665	4.715	7.790	11.890	17.220
42	1.260	2.730	4.830	7.980	12.180	17.640
43	1.290	2.795	4.945	8.170	12.470	18.060
44	1.320	2.860	5.060	8.360	12.760	18.480
45	1.350	2.925	5.175	8.550	13.050	18.900
46	1.380	2.990	5.290	8.740	13.340	19.320
47	1.410	3.055	5.405	8.930	13.630	19.740
48	1.440	3.120	5.520	9.120	13.920	20.160
49	1.470	3.185	5.635	9.310	14.210	20.580
50	1.500	3.250	5.750	9.500	14.500	21.000
51	1.530	3.315	5.865	9.690	14.790	21.420
52	1.560	3.380	5.980	9.880	15.080	21.840
53	1.590	3.445	6.095	10.070	15.370	22.260
54	1.620	3.510	6.210	10.260	15.660	22.680
55	1.650	3.575	6.325	10.450	15.950	21.100
56	1.680	3.640	6.440	10.640	16.240	23.520
57	1.710	3.705	6.555	10.830	16.530	23.940
58	1.740	3.770	6.670	11.020	16.820	24.360
59	1.770	3.835	6.785	11.210	17.110	24.780
60	1.800	3.900	6.900	11.400	17.400	25.200

Wiring

Precautions

The circuit protection device will protect the supply cable against over current. The circuit protection must be selected having due regard to the compressor starting current, such that the supply cables when sized correctly, are protected.
The cable should be selected to match the nominal load of the system, in addition to the losses associated with corrections for length, temperature, impedance etc., in accordance with local codes of practice.

General

• Observe the Electrical Equipment Engineering Standard and Indoor Wiring Regulations.
• The refrigerant piping and corresponding control wiring should be routed closely together.
• For the control wires connecting the Indoor Units, Outdoor Units, and between indoor and Outdoor Units, the use of double-core shielded wires is recommended to prevent interference.
• Provide each Indoor Unit with a separate method of isolation.
• Supply power to each Outdoor Unit via a dedicated branch circuit, and provide a circuit breaker for each Outdoor Unit.
• Connect the power supply cables to the Outdoor Unit via the built in isolator.

Note: Provide separate power supplies for indoor and Outdoor Units.

Wiring System Overview

Wiring

Table below shows the supply requirements

MODEL	STARTING CURRENT (A)	RUNNING CURRENT (A)	POWER COMSUMPTION (KW)
MM-A0280HT	60	19.7	12.6
MM-A0224HT	60	16.2	10.2
MM-A0280HX	60	21.8	12.8
MM-A0224HX	60	18.7	10.6
MM-A0160HX	60	10.6	5.9

Note: The above data is based on the following conditions:

Indoor Temperature: 27^ C DB/19°C WB

Outdoor Temperature: 35^ C DB/25°C WB

Connecting the Power Source Cable and Control Cable

Insert power source cable and control cable after removing the knockout in the Piping/Wiring Panel on the front side of the main unit.

Knock out (x4) for control cable and power source cables.

Piping/Wiring Panel

Power Source cable

• Connect the electric cables and earth wire to the Outdoor isolator terminal block through a notched section at side of the electric parts box, and fix with a clamp.
• Bundle the electric cables using the hole so that they are in the notched section of the electric parts box.

Control Cable

• Connect the control cable between Indoor and Outdoor Units plus the control cable between Outdoor Units to P-Q terminal section through a hole at the side of the electric parts box, and fix with a clamp.
• Use control cable with 2-core shield wire (1.25mm² or more) in order to prevent interference. (Non-polarity.)

Notes:

1 Be sure to separate the power source cables and each control cable.
2 Arrange the power source cables and each control cable so they are not in contact with the bottom surface of the main unit.
3 A terminal block (X-Y) for connecting the optional Central Remote Controller is provided on the Inverter Unit.

P-Q terminal block
(For wiring for control cable between Indoor/Outdoor Unit
For wiring for control cable between Outdoor Units)
Earth Screw (Shield Wire)

Control Wiring Overview

Wire specification, quantity, size of crossover wire (transmission wire) and Remote Controller wire.

Name	Qty	Size	Specification
Crossover wire (between indoor and outdoor units, between outdoor units)	2 cores	1.25mm² ≤ 500m	Shielded wire
Remote controller wiring	3 cores	0.3mm ≤ 200m, 200m < 0.75mm ≤ 500m
Central control remote controller transmission wire	2 cores	1.25mm ≤ 500m, 500m < 2.0mm ≤ 1000m

1. Crossover lines and lines from the central Remote Controller use double-core non-polar wires. Use double-core shielded wires to prevent interference. Connect the ends of shielded wires and insulate the final end. Provide two ground points: one at the central Remote Controller and the other for the Outdoor Units.
2. Use 3-core and polar wire for Remote Controller (A, B, C terminals). Use 2-core wire for grouping wiring of Remote Controller (B,C terminals).
3. Be sure to divide the earth shield wires of the central Remote Controller and crossover into the separate lines (not crossed halfway).

Trial Operation

Contents

Final Installation Checks 39

Adjustment Before Trial Operation 39

Service Support Functions 40

Check Function for Connection of Refrigerant Pipes and Control Transmission Lines 40

Function to Start/Stop Indoor Units From an Outdoor Unit 41

Trial Cooling Operation Function 42

Collective Start/Stop (On/Off) Function 43

Individual Start/Stop (On/Off) Function 44

Alarm Clear Function 45

Clearing a Central Remote Controller/with 7 day Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clearing the Interface PCB of an Inverter Outdoor Unit 45

Clearing an Alarm by Resetting the Power Source 46

Remote Controller Identification Function 46

Forcing the Electronic Control Valve (PMV) 'Fully Open'– on the Indoor Unit 47

Forcing the Electronic Control Valve (PMV) 'Fully Opened/Fully Closed' - on the Outdoor Unit 47

Trial Operation

Final Installation Checks

Precautions

Ensure that the electrical cable used for power supply and control of the system is unable to come into contact with either service valves or pipework which are not insulated.

Electrical Wiring

When installation is complete, check that all power supply and interconnecting wiring has been appropriately protected.

Refrigerant Piping

When refrigerant and drain piping have been completed, ensure that all pipework is fully insulated and apply finishing tape to seal the insulation.

Adjustment Before Trial Operation

Automatic Address Between Indoor and Outdoor Units

Turning on the power for the first time after the system has been installed starts the Automatic Address procedure. It usually takes between 3 and 5 minutes to complete – but in some cases, can take up to 20 minutes.

During Automatic Address the System cannot be Operated

If the Operate button on the indoor unit is pressed during Automatic Address, the following will happen:

1. The operation light on the remote control will come on;
2. The fan on the Indoor Unit will start or stop, according to the mode;
3. Cool air will not come out, because the Outdoor Unit is off.

When Automatic Address procedure is complete, normal operation starts automatically.

Automatic Address Reactivation

Once control of the Indoor Unit has been confirmed, Automatic Address will only be reactivated when:

• the PC board of the Indoor Unit is replaced, and power is turned on for the first time.
• a new Indoor Unit is added, and power is turned on for the first time.

Check Function for Connection of Refrigerant Pipes and Control Transmission Lines

This function is provided to check misconnection of the refrigerant piping and the control transmission line between Indoor and Outdoor Units by the switches on the interface PCB of the Inverter Outdoor Unit.

However, be sure to check items described here before implementing this check function.

• When grouping operation of the Remote Controller is performed and the connected Outdoor Units are used, the check function does not work.
• Only use this facility to check lines one by one in a single Outdoor Unit. Checking multiple lines at the same time may cause faulty readings.

Procedure

Service Support Functions

Function to Start/Stop Indoor Units From an Outdoor Unit

No.	Function	Outline	Clear Setup
(1)	Trial cooling operation	The modes of all the connected indoor units are collectively changed to trial cooling operation modes. NOTE: Control operation as same as that of normal trial operation from the remote controller is performed.	[Setup] Push SW04 for at least 2 seconds under condition of SW01 “2”, SW02 “5”. [Clear] Cleared from the remote controller when SW01 and SW02 are changed to other positions.
(2)	Collective operation	All the connected indoor units are operated collectively. NOTE: Operation contents follow to the setup on the remote controller.	[Setup] Push SW04 for at least 2 seconds under condition of SW01 “2”, SW02 “7”. [Clear] Cleared from the remote controller.
	Collective stop	All the connected indoor units are stopped collectively.	[Setup] Push SW05 for at least 2 seconds under condition of SW01 “2”, SW02 “7”. [Clear] Cleared from the remote controller.
(3)	Individual operation	The specified indoor unit is operated. NOTE: Operation contents follow to the setup on the remote controller. Other indoor units stay as they are.	[Setup] To start an indoor unit, set “16” in SW01 and the address number of the indoor unit (1 to 20) in SW02 and SW07, and then push SW04 for at least 2 seconds. [Clear] Cleared from the remote controller.
	Individual stop	The specified indoor unit is stopped. NOTE: Other indoor units stay as they are.	[Setup] Push SW05 for at least 5 seconds. [Clear] Cleared from the remote controller.

Note:

This start/stop function only sends mode signals for starting, stopping, operation, etc., from the Outdoor Unit to the Indoor Unit(s). If the Indoor Unit did not follow the sent signal, there is no function to re-send the signal and force the Unit to follow the command.

Trial Cooling Operation Function

This function changes the modes of all the Indoor Units to trial operation modes. It is operated by the switch on the interface PCB of the Inverter Outdoor Unit.

Procedure

Collective Start/Stop (On/Off) Function

This function starts/stops all the Indoor Units by the switch on interface PCB of the Inverter Outdoor Unit.

Procedure

Individual Start/Stop (On/Off) Function

This function starts/stops the Indoor Units individually by the switch on the interface PC board of the Inverter Outdoor Unit.

Set SW01 to "16", and SW02 and SW03 to the Indoor Unit to be operated. (See table.) The nominated Units will now operate.

(If the rotary switch of a nominated unit is set at anything from 2 to 16, it cannot start or stop individually. " _ " is displayed on LED 'B'.)

Procedure

Alarm Clear Function

Clearing a Central Remote Controller/with 7 day Timer

This clears the alarm so that the Outdoor Unit can resume operation without having to reset power.

• Push the 'CHECK' button on the remote control panel for at least 5 seconds.
• To clear the check code for that Remote Controller - push the 'CHECK' button for at least 15 seconds. (Using the 'Reset' hole can also clear the check code.)

Clearing the Interface PCB of an Inverter Outdoor Unit

This clears the alarm so that the Outdoor Unit can resume operation without having to reset power. However, this does not clear the check code in the Remote Controller – this is done either by the method described previously, or by using the 'Reset' hole.

Procedure

Clearing an Alarm by Resetting the Power Source

Be sure to reset the power sources of both the Outdoor and Indoor Units.

• Turn the power OFF.
• Turn the power ON for the Outdoor Unit first.
• Turn the power ON for the Indoor Unit next.

Note:

Even if the power source of the Outdoor Unit is re-set, the fault code is still displayed on the Indoor Unit. To clear this, hold down the 'CHECK' button on the Remote Controller for at least 15 seconds.

Remote Controller Identification Function

This function identifies the Remote Controller connected to each Outdoor Unit.

Procedure

Other completion conditions:
1. Send operation continued for 10 minutes.
2. SW01, SW02 or SW03 moved to other position.

Service Support Functions

Forcing the Electronic Control Valve (PMV) 'Fully Open' – on the Indoor Unit

This function forces the electronic control valves open in all the Indoor Units for 2 minutes. It is activated by a switch on the interface PCB of the outdoor Inverter Unit.

Usually, turning on the power to an Indoor Unit once fully closes the PMV – this function is used when you want to open the PMV fully for operation after the power has been turned off a second time.

Procedure

Set SW01 to "2", SW02 to "3" and SW03 to "1" on interface PCB of the Inverter Outdoor Unit, and push SW04 for 2 seconds or more.

(7-segment LED [B] changes to "FF" for 2 minutes.)

Clear

Following Setup, the PMV automatically returns to its normal open pulse after 2 minutes. It is only opened fully for 2 minutes when it receives the FULL OPEN signal from the Outdoor Unit.

Forcing the Electronic Control Valve (PMV) 'Fully Opened/Fully Closed' – on the Outdoor Unit

This function opens or closes the electronic control valve of an Outdoor Unit for 2 minutes.

Fully Open

Short circuit CN30 on the interface PC board of the Inverter Outdoor Unit.

Fully Closed

Short circuit CN31 on the interface PC board of the Inverter Outdoor Unit.

Clear

Both Fully Open and Fully Closed return to the normal open pulse after 2 minutes. Be sure to remove the short circuit after confirmation.

Notes:

If bit 1 of DIP SW08 is ON PMV1 and PMV2 (Refrigerant Control) electronic control valves are turned on.

If bit 1 of DIP SW08 is OFF PMV3 (Cooling Bypass) electronic control valve is turned off.

Troubleshooting

Contents

Remote Controller 'Check' Display 49

Main Remote Controller 49

Operating and Reading the Check Display 49

Room Remote Controller 51

Operating and Reading the Check Display 51

Self-Diagnostic Function 53

Check Codes - Remote Controller/Outdoor Unit .54

Cautions on Refrigerant Leakage 62

Troubleshooting

Remote Controller 'Check' Display

Main Remote Controller

Operating and Reading the Check Display

Push the CHECK button, and the identification number of the faulty Indoor Unit is shown in the Temperature Setup section of the display – and the check code is shown in the TIME section of the display.

If the air filter cleaning sign is displayed, the number of Indoor Units with a filter problem is indicated, followed by the check code.

LCD Display "Standby" Mode:

• When combination of Indoor Units is over the capacity.
• When Indoor Unit with command excepted by operation mode select switch.
• When phase-sequence of power wiring is incorrect.

Troubleshooting

Remote Controller 'Check' Display

7-Segment Display

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Hexadecimal notation

Filter Data

Example: A Filter signal is sent from No. 1 and No. 15 units under grouping operation.

Check Data

Example: Room Temp. sensor of No. 1 is defective. In No. 15, first the Heat Exchanger sensor has failed. Next, the indoor/outdoor inter-unit wire (bus communication line) is defective.

Example: There is no check data.

Troubleshooting

Remote Controller 'Check' Display

Room Remote Controller

Operating and Reading the Check Display

Push the CHECK button, and the identification number of the faulty Indoor Unit (1 - 16) is shown in the Temperature Setup section of the display - along with the check codes of up to 2 problems.

If there is a filter display, the number of the Indoor Unit with a filter problem is shown on the right.

Troubleshooting

Remote Controller 'Check' Display

7-Segment Display

Display on Check Monitor

Filter Data

Example: A Filter signal is sent from No. 1 and No. 16 units under grouping operation.

Check Data

Example: Room temp. sensor of No. 1 is defective.

In No.16, first the heat exchanger sensor has failed.

Next, inter-unit wire (serial signal line) of indoor/outdoor is defective.

Example: There is no check data.

Troubleshooting

Self-Diagnostic Function

*: No display on the remote controller
Note: To retrieve fault codes, ensure rotary switches 1, 2 and 3 on the Outdoor Interface PCB (MCC-1343-01) are all set to 1 (factory default setting).

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
04	Interface	Inverter communication alarm	Inverter serial signal	Serial signal from inverter was interrupted.	·Outdoor PC. board (Interface, INV) error. ·Check communication connector (CN600) between outdoor interface and INV PC. boards. ·Check integrity of refrigeration pipework
		High level refrigerant detected if RBC-RD2-PE is fitted		1000ppm refrigerant detected in compressor housing
08	Interface	Four-way valve circuit	4 way valve	Abnormal refrigeration cycle data detected during heating operation.	(Check all Outdoor Units) ·Check 4 way valve body error. ·Check 4 way valve coil and connection. ·Check resistance characteristics of TS and TE sensors ·Check output voltage characteristics of Pd and Ps pressure sensors. ·Check fixed speed compressor power supply wiring and magnetic switch error.
0b	Indoor	Indoor drain overflow alarm	Float switch	·Float switch operates continuously for 2 minutes. ·Float switch circuit disconnected or connector was out of place.	·Check connection of float switch connector (CN10). ·Check drain pump operation. ·Check drain pump circuit. ·Check blockage of water drain pipe. ·Check indoor PC. board error.
0C	Indoor	Indoor TA sensor alarm	Indoor temp. sensor (TA)	Sensor resistance value was infinity or zero (Open, Short).	·Check connection and wiring of TA connector (CN04). ·Check characteristics of TA sensor resistance value. ·Check indoor PC. board error.
11	Indoor	Indoor fan motor alarm	Indoor fan motor circuit	Status that detection value of motor speed was out of target was detected continuously.	·Check connection and wiring of fan connector (CN07, CN18). ·Check running condenser error for indoor fan. ·Check fan motor error. ·Check indoor PC. board error. ·Check effect of outside air process (OA).
12	Indoor	Other indoor error	Indoor PC. board (EEPROM/Peripheral circuit)	Indoor PC. board did not operate correctly.	·Check power source voltage. ·Check noise of peripheral equipment. ·Check power source transformer output voltage (DC12V).
14	Inverter	G-Tr short-circuit protective system error	Inverter over-current protective circuit	Instantaneous over-current was detected when inverter compressor was activated.	·Check power source wiring. ·Check connection of connector on inverter PC. board. ·Check reactor connection. ·Check AC fuse disconnection. ·Check cause of abnormal overload operation. ·Check inverter compressor error and rare short. ·IGBT conductive check. ·Check shortage of capacitor capacity. ·Check outdoor PC. board (INV) error.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
17	Inverter	Current detection circuit system alarm	Inverter current detection circuit	Current flows over the set value when inverter compressor stop was detected.	• Check wiring of current detection circuit system. • Check outdoor P.C. board (INV) error.
18	Interface	TE1 sensor alarm	Outdoor heat exchanger sensor (TE1)	Sensor resistance value was infinity or zero (Open, Short) (automatic back-up operation after judgment).	• Check connection of TE1 sensor connector. • Check characteristics of TE1 sensor resistance value. • Check outdoor P.C. board (Interface) error.
1C	Interface	Extension IC, EEPROM alarm	Outdoor interface P.C. board circuit	Outdoor P.C. board (Interface) did not operate correctly.	• Check power source voltage. • Check power source noise. • Check outdoor P.C. board (Interface) error.
1d	Outdoor	Compressor alarm	Inverter compressor system circuit	Over-current was detected several seconds after inverter compressor was activated.	• Check inverter compressor lock. • Check power source voltage (AC380 to 415V ± 10%). • Check wiring of inverter compressor system and miss-phase. • Check connection of connector on inverter P.C. board. • Conductive check for crank case heater. (Activation error check by liquid stagnation in compressor). • Check outdoor P.C. board (INV) error.
1F	Outdoor	Compressor break down	Inverter current detection circuit	After inverter frequency reduced by current release, over-current was detected and stopped.	• Check power source voltage (AC380 to 415V ± 10%). • Check cause of abnormal overload operation. • Check current sensor detection circuit system. • Check outdoor P.C. board (INV) error.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
21	Outdoor	· Inverter high-pressure SW system alarm	Inverter high-pressure SW system circuit	High-pressure SW or IOL operated. · High-pressure Pd ≥ 2.5MPaG; [21] is displayed · High-pressure Pd < 2.5MPaG; [E5] is displayed	· Check inverter high-pressure SW error. · Check IOL operation and case temp. up. (Check cause of overload operation.) · Check service valve full open. · Check connection of outdoor fan connector. · Check outdoor fan motor, running condenser error. · Check blockage of outdoor PMV. 1) Refrigerant reducing circuit (PMV1, PMV2). 2) Cooling bypass circuit (PMV3). 3) Liquid line stopping check valve (Cooling only model). · Check blockage of outdoor/indoor heat exchanger. · Short-circuit status between outdoor discharge air and suction air. · Check Pd pressure sensor error. · Check blockage of hot gas bypass SV2 circuit. · Check outdoor P.C. board (Interface) error. · Check open valve status of indoor PMV. · Check miswiring of communication line between indoor and outdoor.
22	Interface	High-pressure protective operation Pd sensor detection value	High pressure up protection by high-pressure	Pd sensor detected 3.3MPaG or more.	· Check Pd pressure sensor error. · Check service valve full open. · Check cause of overload operation. · Check connection of outdoor fan connector. · Check outdoor fan motor, running condenser error. · Check blockage of outdoor PMV. 1) Refrigerant reducing circuit (PMV1, PMV2). 2) Liquid line stopping check valve (Cooling only model). · Check blockage of outdoor/indoor heat exchanger. · Short-circuit status between outdoor discharge air and suction air. · Check blockage of hot gas bypass SV2 circuit. · Check outdoor P.C. board (Interface) error. · Check indoor side fan system error (cause of air volume down). · Check open valve status of indoor PMV. · Check miswiring of communication line between indoor and outdoor.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
89	Interface	Indoor capacity over	Total connected capacity of indoor units greater than outdoor units	Total capacity of indoor units was 135% more than total capacity of outdoor units.	• Check indoor unit connection capacity. • Check indoor unit HP capacity. • Check outdoor HP setup. • Check outdoor P.C. board (INV) error.
8C	Interface	Outdoor unit back-up operation prevented	Heat mode selection during set-up	Operation mode of the system changed to HEAT during operation setup of outdoor unit.	• If outdoor unit back-up operation is being set-up heating operation is not available.
8d	Interface	Reduction of No. of connected outdoors	No. of connected outdoor units communication	No. of connected outdoor units was judged to be less than No.of units stored in memory of EEPROM. [NOTE] If this code is displayed when back-up operation of outdoor error was performed, set “Alarm clear”.	• Check connection of communication connector. • Check communication line between outdoor units. • Check power source OFF (power source breaker) of outdoor unit. • Check outdoor P.C. board (Interface) error. • Check outdoor back-up setup.
8E	Interface	Excessive No. of connected outdoors	No. of connected outdoor units communication	No. of outdoor units exceeded 5.	• Check connected No. of outdoor units (Max. 5 units per 1 system). • Check communication line between outdoor units. • Check outdoor P.C. board (Interface) error.
8F	Interface	Constant-speed outdoor address duplication	Duplication of manual address switch setup of fixed-speed outdoor	Address No. of fixed-speed outdoor unit was duplicated when address setup of outdoor unit was performed manually.	• Check address switch setup of fixed-speed outdoor. • Check outdoor P.C. board (Interface) error.
93	Indoor	Indoor TC1 sensor alarm	Indoor gas pipe temp. sensor (TC1)	• Sensor resistance value was infinity or zero (Open, Short).	• Check connection of TC1 sensor connector (CN12). • Check characteristics of TC1 sensor resistance value. • Check indoor P.C. board error.
94	Indoor	Indoor TC2 sensor alarm	Indoor liquid pipe temp. sensor (TC2)	• Sensor resistance value was infinity or zero (Open, Short).	• Check connection of TC2 sensor connector (CN05). • Check characteristics of TC2 sensor resistance value. • Check indoor P.C. board error.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
95	Interface	Communication alarm between indoor and outdoor	Inter-unit wire between indoor and outdoor (PQ control line)	• Communication was interrupted. • There was no inverter outdoor unit.	• Check power source of indoor unit. (Is power turned on?) • Check power source of outdoor unit. (Is power turned on?) • Check connection and disconnection of communication line (PQ) between indoor and outdoor. • Check connection of communication connector (CN24) of indoor P.C. board. • Check connection of communication connector of outdoor P.C. board. • Check indoor P.C. board error. • Check outdoor P.C. board (Interface) error. • Check inverter outdoor setup (Presence of setup/duplication) when check code [U][-][9][5] is displayed at outdoor.
96	Interface	Disagreement detected between indoor and outdoor address	Inter-unit wire between indoor and outdoor (PQ control line)	• No of connected indoor units exceeded 40. • Connected to other outdoor system or central management remote controller.	• Check No. of indoor units connected to outdoor. • Check connection and miswiring of communication line (PQ) between indoor and outdoor. • Check connection of central management remote controller wiring. (Check connection and miswiring of communication line (XY).) • Check outdoor P.C. board (Interface) error.
97	Indoor	BUS communication alarm (1)	Central management system communication circuit	Communication of central management system was interrupted.	• Check communication line (XY) at outdoor side or indoor side. • Check connector (CN15) on indoor P.C. board. • Check indoor power source wiring and voltage. • Check central management controller and indoor power source system. (Check whether one side is not turned on.) • Check peripheral noise. • Check indoor P.C. board error. • Check power failure. (Problems may be caused by central management side by power failure. The returns to normal status by resetting power source.)
98	Indoor	BUS communication alarm (2)	Central management address setup	Addresses duplicated.	• Check communication line (XY) at outdoor side or indoor side. • When grouping operation is performed, check communication line of indoor unit. [NOTE] When connecting XY communication line to indoor unit (No.2 to No.16), check code [98] is displayed. • Network address duplication check. • Indoor P.C. board error check. • Check No. of connected central management controllers. (If multiple units are connected, correct to 1 unit.) • Check central management controller.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
99	Remote controller	Indoor remote controller communication alarm	Indoor remote controller communication circuit	Serial between indoor PC. board and remote controller was interrupted.	·Check remote controller wire (ABC).·Check disconnection and connector contact error.·Check remote controller error.·Check indoor PC. board error.·Check duplication of indoor unit No.1. (When grouping operation is set up.)
9A	Indoor	Indoor miswiring/ misconnection	Miswiring or misconnection of indoor unit	Change of detection value of indoor unit temp. sensor or pressure sensor after operation has started. ·Judgement time: Approx. 15 minutes after activation. ·Cooling: when changed value of TC1 is 5°C or less.	·Check miswiring of indoor unit for which alarm is displayed. ·Check blockage in pipe of indoor unit for which alarm is displayed. ·Check refrigerant shortage. [NOTE] When checking miswiring, follow the steps below: 1) Check miswiring after stopping outdoor unit for 20 minutes or more. Microprocessor is locked so that miswiring check function does not operate forcibly for 2 minutes and 30 seconds after power has been turned on. 2) Check miswiring under the following conditions: In cooling Room temp. : 18 to 32°C Outside temp. : 15 to 43°C 3) When grouping operation over other outdoor system is performed, miswiring check function cannot be used.
9F	Indoor	Indoor PMV blockage	Refrigerant circulation volume shortage	Refrigerant did not flow in indoor unit. ·Compared with TA temp., TC1 and TC2 temp. are continuously below 4°C for 60 minutes.	·Check indoor PMV open valve status. ·Check characteristics of TC1, TC2, and TA sensor resistant value. ·Check indoor pressure sensor error. ·Check indoor PMV connector and wiring. ·Check breakage and blockage of pipe. ·Check operation status of outdoor compressor. (When outdoor fan operates and compressor stops, error is shown on indoor side. In this case, check outdoor side.)
A0	Interface	TD1 sensor alarm	Discharge temp. sensor (TD1)	Sensor resistance value is infinity or zero (Open, Short).	·Check connection of TD1 sensor connector. ·Check characteristics of TD1 sensor resistance value. ·Check outdoor PC. board (Interface) error.
A1	Interface	TD2 sensor alarm	Discharge temp. sensor (TD2)	Sensor resistance value is infinity or zero (Open, Short).	·Check connection of TD2 sensor connector. ·Check characteristics of TD2 sensor resistance value. ·Check outdoor P.C. board (Interface) error.
A2	Interface	TS1 sensor alarm	Suction temp. sensor (TS1)	Sensor resistance value is infinity or zero (Open, Short).	·Check connection of TS1 sensor connector. ·Check characteristics of TS1 sensor resistance value. ·Check outdoor P.C. board (Interface) error.
A3	Interface	TS2 sensor alarm	Suction temp. sensor (TS2)	Sensor resistance value is infinity or zero (Open, Short).	·Check connection of TS2 sensor connector. ·Check characteristics of TS2 sensor resistance value. ·Check outdoor P.C. board (Interface) error.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
A6	Interface	Discharge temp. TD1 alarm	Discharge temp. (TD1) protective operation	Protective stop was repeated for more than three times when discharge temp. TD1 exceeded 130°C.	• Check outdoor service valve is (Gas side, Liquid side) full open. • Check blockage of outdoor PMV. 1) Refrigerant reduction circuit (PMV1, PMV2). 2) Cooling bypass circuit (PMV3). 3) Liquid line stopping check valve (cooling only model). • Check characteristics of TD1 sensor resistance value. • Check 4 way valve error.
A7	Interface	TS condition gas leak detection	Suction temp. protective operation (TS1, TS2)	Protective stop when status suction temp. TS is above the critical temp. continues for 10 minutes and was repeated for three times or more. <TS alarm critical temp.> In cooling: 60°C or more.	• Check refrigerant shortage. • Check outdoor service valve (Gas side, Liquid side) full open. • Check blockage of outdoor PMV. 1) Refrigerant reducing circuit (PMV1, PMV2). 2) Liquid line stopping check valve (cooling only model). • Check characteristics of TS1, TS2 resistance value. • Check 4 way valve error.
A8	Interface	TE2 sensor alarm	Outdoor heat exchanger sensor (TE2)	Sensor resistance value is infinity or zero (Open, Short).	• Check connection of TE2 sensor connector. • Check characteristics of TE2 sensor resistance value. • Check outdoor P.C. board (Interface) error.
AA	Interface	Pd sensor alarm	High-pressure Pd sensor	Pd sensor output voltage is zero (Sensor open).	• Check connection of Pd sensor connector. • Check Pd sensor error. • Check outdoor P.C. board (Interface) error.
A5	Interface	Misconnection of pressure sensor	Miswiring of pressure sensor (Pd, Ps)	• High-pressure Pd sensor and Low-pressure Ps sensor were exchanged. • Output voltage of both sensors are zero.	• Check connection of high-pressure Pd sensor connector. • Check connection of low-pressure Ps sensor connector. • Check pressure sensor Pd and Ps error. • Check outdoor P.C. board (Interface) error. • Check miswiring of fixed-speed compressor terminal. (Inverse operation of fixed-speed scroll compressor.) • Check compressor function error.

Troubleshooting

Check Codes - Remote Controller/Outdoor Unit

Check code	Detected position	Check code name	Cause	Problem detection condition	Check item
AE	Interface	Detection of TD1 condition gas leak	Discharge temp. increased when small capacity of indoor operates (TD1)	Protective stop when discharge temp. TD1 detected 110°C or more when inverter compressor operated at low frequency and was repeated three times.	• Check refrigerant shortage. • Check blockage of outdoor PMV. 1) Refrigerant reduction circuit (PMV1, PMV2). 2) Cooling bypass circuit (PMV3). 3) Liquid line stopping check valve (cooling only model). • Check characteristics of TD1 sensor resistance value. • Check blockage of indoor filter. • Check blockage of pipe.
AF	Interface	Phase order alarm	Miswiring of phase order of outdoor unit	Phase order error was detected when power was turned on.	• Check phase order of outdoor power source wiring. • Check outdoor PC. board (Interface) error.
b2	Interface	TD3 sensor alarm	Discharge temp. sensor (TD3)	Sensor resistance value is infinity or zero (Open, Short).	• Check connection of TD3 sensor connector. • Check characteristics of TD3 sensor resistance value. • Check outdoor PC. board (Interface) error.
b3	Interface	TD4 sensor alarm	Discharge temp. sensor (TD4)	Sensor resistance value is infinity or zero (Open, Short).	• Check connection of TD4 sensor connector. • Check characteristics of TD4 sensor resistance value. • Check outdoor PC. board (Interface) error.
b4	Interface	Ps sensor alarm	Low-pressure Ps sensor	• Ps sensor output voltage was zero. • Ps pressure detected continuously 0.95MPaG or more during operation.	• Misconnection of connector between Pd sensor and Ps sensor. • Check connection of Ps sensor connector. • Check Ps sensor error. • Check compressor function error. • Check 4 way valve error. • Check outdoor PC. board (Interface) error.
b5	Indoor	Indoor outside input alarm	Alarm display by outside input	• By voltage value Vemg to be input in outside alarm input terminal. (Vemg <3.75V was detected for 60 seconds.)	• When outside equipment is connected to connector (CN21): 1) Check outside equipment error. 2) Check indoor PC. board error. • When outside equipment is not connected to connector (CN21): 1) Check indoor PC. board.
b6	Indoor	Indoor outside interlock	Display of outside interlock input	• By voltage value Vemg to be input in outside alarm input terminal. (Vemg <1.25V was detected for 60 seconds.)	• When outside equipment is connected to connector (CN21): 1) Check outside equipment error. 2) Check indoor PC. board error. • When outside equipment is not connected to connector (CN21): 1) Check indoor PC. board.
b9	Indoor	Indoor pressure sensor alarm	Indoor pressure sensor	Indoor pressure sensor output was zero. (After judgement, operation transits to automatic back-up operation.)	• Check connection and wiring of indoor pressure sensor connector (CN07). • Check indoor pressure sensor error. • Check indoor PC. board error.

Troubleshooting

Cautions On Refrigerant Leakage

Check of Density Limit

The room in which an air conditioning unit is to be installed requires a design such that, should there be a refrigerant leak, the density of the gas will not exceed a set limit.

The refrigerant R407C which is used in the system is safe, without the toxicity or combustibility of ammonia. However, since it's an asphyxiant it poses the risk of suffocation if its density should rise excessively.

Suffocation from leakage of R407C is almost non-existent. With the recent increase in the number of high density buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners.

If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit – and in the event of an emergency, measures can be taken before injury occurs.

In a room where the density may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device.

The density is:

Total amount of refrigerant (kg)

Min. volume of the Indoor Unit installed room (^3)

≤ Density limit (kg / m^3)

The density limit of R407C which is used in multi air conditioners is 0.15kg / m^3

Note 1:

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A, [B] and C is 10kg

The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg .

Troubleshooting

Cautions On Refrigerant Leakage

Note 2:

The standards for minimum room volume are as follows.

(1) No partition (shaded portion).

(2) When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas (i.e. an opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

(3) If an Indoor Unit is installed in each partitioned room and the refrigerant piping is interconnected, the smallest room becomes the object. But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

Note 3:

The minimum indoor floor space compared with the amount of refrigerant is roughly as shown:

(When the ceiling is 2.7m high)

Environmental

Precaution for Refrigerant Leakage

This air conditioning system contains HFC R407C refrigerant gas. We recommend that the installer should compare the total amount of refrigerant contained in the system with the air volume of each of the rooms in which an indoor unit has been installed. This practice is of

particular importance when installing a system with a large refrigerant volume. Using these figures, calculate the worst case refrigerant density (using the total refrigerant charge) in the unlikely event of a leak. If the resultant density level exceeds that of the standard, then either a ventilation system or alarm system, or both, must be installed. The above procedure must be completed in accordance with local, national and international standards, codes of practice and statutory requirements.

Product Maintenance

To minimise the chances of environmental damage and to ensure the efficient operation of the unit, it is recommended to have the air conditioner periodically checked and serviced by a qualified engineer.

Product disposal

Please dispose of the air conditioner unit in an environmentally responsible manner. Recycling is the preferred disposal method.
When disposing of an air conditioner system, contact either the manufacturer, your local environmental control authority or a local waste disposal company for advice.
Ensure all packaging material is either recycled or disposed of in accordance with local regulations.
The refrigerant gas within the unit should only be removed by an authorised company.

WARNING: Discharge of refrigerant to atmosphere is illegal and may lead to prosecution.

TOSHIBA

Sommaire

Dimension de Tuyau Principal

Controll finally installation 287

4. Nominate condities

Koeling : Binnen temperatuur 27^ DB/19°C WB

(4 posities per installation)