Midea M2OG-14HFN8-Q Bedienungsanleitung

SERVICE MANUAL

MIDEA AIRCONDITIONER

EUROPE MARKET

SUPER DC INVERTER MULTI TYPE

M2OG-14HFN8-Q

M2OC-18HFN8-Q

M2OD-18HFN8-Q

M3OF-21HFN8-Q

M3OF-27HFN8-Q

M3OE-27HFN8-Q

M4OB-36HFN8-Q

M5OD-42HFN8-Q

M4OE-28HFN8-Q

M5OE-42HFN8-Q

DC MULTI OUTDOOR UNITS

CONTENTS

1. General information of Outdoor Units .................................. 2

2. Features .................................................................................. 3

3. Dimensions ............................................................................. 4

4. Refrigeration Cycle Diagram ................................................. 5

5. Wiring diagram ....................................................................... 7

6. Indoor units combination .................................................... 14

7. Sound Levels ........................................................................ 17

8. Installation Details ............................................................... 18

8.1 Wrench torque sheet for installation ........................................................................... 18

8.2 Connecting the cables ................................................................................................ 18

8.3 Pipe length and the elevation ..................................................................................... 18

8.4 Installation for the first time ......................................................................................... 19

8.5 Adding the refrigerant after running the system for many years ................................ 22

8.6 Re-installation while the indoor unit need to be repaired ........................................... 23

8.7 Re-installation while the outdoor unit need to be repaired ......................................... 24

9. Electronic control function .................................................. 27

10. Troubleshooting ................................................................. 32

Caution: Risk of fire/flammable materials

General information of Outdoor Units

Model name Dimension (mm) Compressor

M2OG-14HFN8-Q 800x333x554

KSN140D21UFZ

M2OC-18HFN8-Q 800x333x554

KSM135D23UFZ

M2OD-18HFN8-Q 800x333x554

KSN140D21UFZ

M3OF-21HFN8-Q 845x363x702

KSN140D21UFZ

M3OE-27HFN8-Q 845x363x702

KTF235D22UMT

M3OF-27HFN8-Q 845x363x702

KTM240D57UMT

M4OB-36HFN8-Q 946x410x810

KTF310D43UMT

M4OE-28HFN8-Q 946x410x810

KTM240D57UMT

M5OD-42HFN8-Q 946x410x810

KTF310D43UMT

M5OE-42HFN8-Q 946x410x810

KTF310D43UMT

Features

The hydrophilic fin can improve the heating efficiency at operation mode.

It protects the valves and prevents water from dripping.

4 way valve control

It is only operated in the heating operation mode except defrosting operation.

Outdoor unit

Power relay control

Hydrophilic aluminum fin

Anti-rust cabinet

Valve protection cover

Low noise air flow system

Discharge pipe temperature protection

Dimensions

Model Unit：mm

W D H W1 A B

M2OG-14HFN8-Q 800 333 554 860 514 340

M2OC-18HFN8-Q 800 333 554 860 514 340

M2OD-18HFN8-Q 800 333 554 860 514 340

M3OF-21HFN8-Q 845 363 702 923 540 350

M3OE-27HFN8-Q 845 363 702 923 540 350

M3OF-27HFN8-Q 845 363 702 923 540 350

M4OE-28HFN8-Q 946 410 810 1034 673 403

M4OB-36HFN8-Q 946 410 810 1034 673 403

M5OD-42HFN8-Q 946 410 810 1034 673 403

M5OE-42HFN8-Q 946 410 810 1034 673 403

Refrigeration Cycle Diagram

4.1

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

4.2 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

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

4.3 Refrigeration circuit drawing of inverter 1 drive 4 type

LIQUID VALVE A

GAS VALVE A

HEAT

EXCH ANGE

(EVAP ORATOR)

HEAT

EXCHANGE

(CONDENSER)

Compressor

4-WAY VALVE

COO LING

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 CAPILLA RY C

LIQUID VALVE C

GAS VALVE C

EXV D CAPILLA RY D

LIQUID VALVE D

GAS VALVE D

Accumulator

High pressure

switch

Low pressure

switch

T2B-A Evapora tor

temp. sensor outlet

T2B-B

T2B-C

T2B-D

4.4 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

middle

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

Wiring diagram

M2OC-18HFN8-Q

M2OG-14HFN8-Q

M2OD-18HFN8-Q

Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi

models.

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