220
Failure code
Outdoor
digital display
tube:
124-1, 2
Indoor wired
controller: 78,
7C
Indoor unit LED status
LED5
Failure description:
Compressor module three-phase power
failure
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
Check if the modules' R, S,
T are correct, if missing phase
◆
Check if the power supply of
the electrical box lack of phase,
if the voltage is too low
3. Abnormity confirmation
conditions
Module three-phase power
failure
4. Possible causes
◆
Module three-phase voltage
is too low
◆
Module three-phase power
lack of phase or imbalance
Check if the power supply voltage
too low or lack of phase
Check if the electrical box connect
correctly
Check if the inverter module connect
well
Check if the inverter module is
normal
Replace the electrical box to
compare
Reconnect or re-fix it in
accordance with wiring
diagram.
Replace the inverter module
Adjust the power supply.
Y
Y
Y
Y
N
N
N
N
Reconnect or re-fix it in
accordance with wiring
diagram.
Summary of Contents for MRV 5-RC AB052MAERA
Page 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Page 3: ......
Page 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Page 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Page 106: ...103 2 Dimension 4 19 200 60 25 25 25 249 108 232 84 69 388 73 82 65 103 177 4 44 4 35 277 ...
Page 116: ...113 2 Preparation before installation ...
Page 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Page 165: ...162 One by four valve box PCB code 0151800466 ...