211
Failure code
Outdoor
digital
display tube:
115-1, 2
Indoor wired
controller:
73
Indoor unit LED status
LED5
Failure description:
Compressor module DC BUS over voltage
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 power voltage
is too high and results in over
voltage after rectification;
◆
Check if the cabinet is
correctly wired.
3. Abnormity confirmation
conditions
Raise failure alarm when
power voltage>DC642V.
INV control board recovers
automatically when voltage
<DC642V.
4. Possible causes
◆
Incorrect connection may
result in over voltage alarm;
◆
High power voltage may
result in over voltage.
Check if the supply voltage is normal.
Check if the cabinet is wired correctly.
Test if the voltage of DC bus is above 642V.
Replace and compare the
neighboring electrical cabinet
by troubleshooting.
Rewire the cabinet in accordance
with wiring diagram.
The detection circuit of variable
frequency board is damaged.
Replace the board.
Adjust the supply voltage.
Y
Y
Y
N
N
N
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 ...