MDV RM2-053B-OU User manual

SERVICE MANUAL
MDV AIRCONDITIONER
SUPER DC INVERTER MULTI TYPE
RM2-053B-OU
RM3-079B-OU
RM4-108B-OU
DC MULTI OUTDOOR UNITS

1
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....................................................11
7. Sound Levels........................................................................13
8. Installation Details ...............................................................14
8.1 Wrench torque sheet for installation........................................................................... 14
8.2 Connecting the cables................................................................................................ 14
8.3 Pipe length and the elevation..................................................................................... 14
8.4 Installation for the first time......................................................................................... 15
8.5 Adding the refrigerant after running the system formany years ................................ 18
8.6 Re-installation while the indoor unit need to be repaired........................................... 19
8.7 Re-installation while the outdoor unit need to be repaired......................................... 21
9. Electronic control function .................................................23
10. Troubleshooting.................................................................28
Caution: Risk of fire/flammable materials

2
1. General information of Outdoor Units
Model name
Dimension (mm)
Compressor
RM2-053B-OU
800x333x554
KSM135D23UFZ
RM3-079B-OU
845x363x702
KTF235D22UMT
RM4-108B-OU
946x410x810
KTF310D43UMT

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2. Features
the heating efficiency at operation mode.
It protects the valves and prevents water from dripping.
Power relay control
Low noise air flow system
Hydrophilic aluminum fin
The hydrophilic fin can improve
4 way valve control
Outdoor unit
It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet
Valve protection cover
Discharge pipe temperature protection

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3. Dimensions
A
D B
Model
Unit：mm
W
D
H
W1
A
B
RM2-053B-OU
800
333
554
860
514
340
RM3-079B-OU
845
363
702
923
540
350
RM4-108B-OU
946
410
810
1034
673
403