TCM MMCUT18AS2 User manual

Multi outdoor units

sErViCE MAnuAl Multi zone

CondEnsinG units

Revision E: ODMFI-E-1705

Model Numbers:

MMCUT18AS2 MMCUT27AS3 MMCUT36AS4

MMCUT48AS5

WARNING

•Installation MUST conform with local building codes or, in the absence of local

codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition

and Canadian Electrical Code Part1 CSA C.22.1.

•The information contained in the manual is intended for use by a qualified service

technician familiar with safety procedures and equipped with the proper tools and

test instruments

•Installation or repairs made by unqualified persons can result in hazards to you

and others.

•Failure to carefully read and follow all instructions in this manual can result in

equipment malfunction, property damage, personal injury and/or death.

Table of Contents

1. Indoor Unit Combination

2. Dimension Of Outdoor Unit

3. Refrigerant Cycle Diagram

4. Installation Details

5. Electronic Function

6. Wiring Diagrams

7. Trouble Shooting

8. Disassembly Instructions

CONTENTS

1. Indoor Unit Combination.......................................................................................................................................... 4

2. Dimension Of Outdoor Unit...................................................................................................................................... 6

3. Refrigerant Cycle Diagram........................................................................................................................................ 8

4. Installation Details ..................................................................................................................................................11

4.1 Wrench torque sheet for installation ............................................................................................................... 11

4.2 Connecting the cables ...................................................................................................................................... 11

4.3 Pipe length and the elevation........................................................................................................................... 11

4.4 First-Time Installation....................................................................................................................................... 11

4.5 Adding Refrigerant after Long-Term System Operation...................................................................................13

4.6 Procedure when servicing the indoor unit refrigeration circuit.......................................................................13

4.7 Evacuation after servicing the outdoor unit refrigeration circuit ....................................................................14

5. Electronic Function.................................................................................................................................................16

5.1 Abbreviation ..................................................................................................................................................... 16

5.2 Electric Control Working Environment............................................................................................................. 16

5.3 Main Protection................................................................................................................................................16

5.4 Control and Functions ...................................................................................................................................... 18

6. Wiring Diagrams .....................................................................................................................................................23

7. Troubleshooting ..................................................................................................................................................... 30

7.1Safety................................................................................................................................................................. 30

7.2Indoor Unit Error Display...................................................................................................................................31

7.3 Outdoor Unit Display ........................................................................................................................................ 34

7.4 Diagnosis and Solution .....................................................................................................................................39

7.5 Trouble Criterion of Main Parts........................................................................................................................ 88

8. Disassembly Instructions ........................................................................................................................................ 99

MMCUT18AS2 (WCA30 metal plate)...................................................................................................99

MMCUT27AS3 (WD30 metal plate)....................................................................................................106

MMCUT36AS4 (WD30 metal plate)....................................................................................................114

MMCUT48AS5 (WE30 metal plate) .................................................................................................... 121

1. Indoor Unit Combination

Multi DC

Outdoor Unit Nominal

capacity Suggested

Combination Limit

1drive 2 5.2kW

None

9+9

9+12

12+12

Multi DC

Outdoor Unit Nominal

capacity Suggested

Combination Limit

1 drive 5 14kW

18+18

None

18+24

24+24

9+9+18

9+9+24

9+12+12

9+12+18

9+12+24

9+18+18

9+18+24

9+24+24

12+12+12

12+12+18

12+12+24

12+18+18

12+18+24

12+24+24

18+18+18

Multi DC

Outdoor Unit Nominal

capacity Suggested

Combination Limit

1drive 3 7.8kW

9+9

None

9+12

9+18

12+12

12+18

18+18

9+9+9

9+9+12

9+9+18

9+12+12

9+12+18

12+12+12

Multi DC

Outdoor Unit Nominal

capacity Suggested

Combination Limit

1 drive 4 10.5kW

9+18

None

12+12

12+18

18+18

9+9+9

9+9+12

9+9+18

9+12+12

9+12+18

9+18+18

12+12+12

12+12+18

12+18+18

9+9+9+9

9+9+9+12

9+9+9+18

9+9+12+12

9+9+12+18

9+12+12+12

12+12+12+12

18+18+24

9+9+9+9

9+9+9+12

9+9+9+18

9+9+9+24

9+9+12+12

9+9+12+18

9+9+12+24

9+9+18+18

9+9+18+24

9+12+12+12

9+12+12+18

9+12+12+24

9+12+18+18

9+18+18+18

12+12+12+12

12+12+12+18

12+12+12+24

12+12+18+18

9+9+9+9+9

9+9+9+9+12

9+9+9+9+18

9+9+9+9+24

9+9+9+12+12

9+9+9+12+18

9+9+9+18+18

9+9+12+12+12

9+9+12+12+18

9+12+12+12+12

9+12+12+12+18

12+12+12+12+12

2. Dimension Of Outdoor Unit

Model

Unit：

MMCUT18AS2

845 363 702 923 540 350

inch

33.3

14.3

27.6

36.0

21.3

13.8

MMCUT27AS3

946

410

810

1034

673

403

inch

37.2

16.5

31.9

40.6

26.5

15.9

MMCUT36AS4

946

410

810

1034

673

403

inch

37.2

16.5

31.9

40.6

26.5

15.9

Model

Unit：

MMCUT48AS5

952

415

1333

1060

634

404

inch

37.5

16.3

52.5

41.7

25.0

15.9

3. Refrigerant Cycle Diagram

3.1 Refrigeration circuit drawing of inverter 1 drive 2 type

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR) HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

middle

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILLARY A

CHECK VALVE

CAPILLARY TUBE

EXV B CAPILLARY B

LIQUID VALVE B

GAS VALVE B

Accumulator

T2B-A

Evaporator

temp. sensor outlet

T2B-B

3.2 Refrigeration circuit drawing of inverter 1 drive 3 type

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR) HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

middle

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILLARY A

CHECK VALVE

CAPILLARY TUBE

EXV B CAPILLARY B

LIQUID VALVE B

GAS VALVE B

EXV C CAPILLARY C

LIQUID VALVE C

GAS VALVE C Accumulator

T2B-A

Evaporator

temp. sensor outlet

T2B-B

T2B-C

3.3 Refrigeration circuit drawing of inverter 1 drive 4 type

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR) HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COOLING

HEATING

T2 Evaporator

temp. sensor

middle

T1 Room

temp. sensor

Condenser

temp. sensor

T5 Discharge

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILLARY A

CHECK VALVE

CAPILLARY TUBE

EXV B CAPILLARY B

LIQUID VALVE B

GAS VALVE B

EXV C CAPILLARY C

LIQUID VALVE C

GAS VALVE C

EXV D CAPILLARY D

LIQUID VALVE D

GAS VALVE D

Accumulator High pressure

switch

Low pressure

switch

T2B-A Evaporator

temp. sensor outlet

T2B-B

T2B-C

T2B-D

3.4 Refrigeration circuit drawing of inverter 1 drive 5 type

LIQUID VALVE A

GAS VALVE A

HEAT

EXCHANGE

(EVAPORATOR) HEAT

EXCHANGE

(CONDENSER)

COOLING

HEATING

T2 Evaporator

temp. sensor

T1 Room

temp. sensor

Condenser

temp. sensor

T4 Ambient

temp. sensor

INDOOR OUTDOOR

EXV A CAPILLARY A

CHECK VALVE

CAPILLARY TUBE

EXV B CAPILLARY B

LIQUID VALVE B

GAS VALVE B

EXV C CAPILLARY C

LIQUID VALVE C

GAS VALVE C

EXV D CAPILLARY D

LIQUID VALVE D

GAS VALVE D

EXV E CAPILLARY E

LIQUID VALVE E

GAS VALVE E Compressor

4-WAY VALVE

T5 Discharge

temp. sensor

Accumulator High pressure

switch

Low pressure

switch

T2B-A Evaporator

temp. sensor outlet

T2B-B

T2B-C

T2B-D

T2B-E

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