212
Failure code
Outdoor
digital
display tube:
117-1, 2
Indoor wired
controller:
75
Indoor unit LED status
LED5
Failure description:
Compressor module software over current
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 compressor is
insecurely connected;
◆
Check the system for liquid
shock.
◆
Check if the module is in
normal conditions and subject
to short circuit.
◆
Check if the compressor is
well.
◆
Check if the compressor
wiring UVW is connected
correctly and the inverter board
and module board is securely
wired.
3. Abnormity confirmation
conditions
Over current of module software
4. Possible causes
◆
The current detection
loop of inverter board is in
poor performance, which
results in rapid current rise of
compressor;
◆
Damage or liquid shock is
found in compressor, which
results in over current;
◆
UVW wiring is wrongly
connected or the inverter board
and module board are wired
insecurely.
Check if the supply voltage is normal.
Check if the electrical
cabinet is wired correctly,
the compressor matches
U, V and W correctly
and the variable frequency
board and module board
is connected securely.
Check if the power module is normal.
Check if the detection circuit of
variable frequency board is normal.
Check if the winding and insulation
of compressor is normal.
Replace and compare the
neighboring electrical cabinet
by exclusion method
Readjust wiring and fixing method in
accordance with the circuit diagram.
Adjust the supply voltage.
Replace the power module.
Replace the variable frequency
board.
Replace the compressor.
Y
Y
Y
Y
Y
N
N
N
N
N
Содержание MRV 5-RC AB052MAERA
Страница 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Страница 3: ......
Страница 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Страница 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Страница 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 ...
Страница 116: ...113 2 Preparation before installation ...
Страница 130: ...127 2 Dimension 290 67 410 220 567 137 160 189 57 144 109 159 159 212 393 4 22 65 65 65 65 65 44 65 76 4 52 67 156 830 ...
Страница 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Страница 165: ...162 One by four valve box PCB code 0151800466 ...