207
Failure code
Outdoor
digital
display tube:
112-1, 2
Indoor wired
controller:
70
Indoor unit LED status
LED5
Failure description:
Compressor module radiator temp. too high
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 radiator is in
normal conditions;
◆
Check if the cooling fan is in
normal conditions;
◆
Check if the radiator sensor
is in normal conditions.
3. Abnormity confirmation
conditions
Raise failure alarm when
temperature ≥94
°C.
INV control board recovers
automatically when
temperature ≤94
°C.
4. Possible causes
◆
The module is insecurely
fixed, which results in poor
heat dissipation;
◆
The radiator sensor is
broken which results in high
detection temperature;
◆
The cooling fan fails to
operate;
◆
There is no 220V output
from the terminal of cooling fan
of PCB.
Check if the cooling fan rotates
and the sensor is normal
Check if the module is
secured and the cooling
silica gel is even up
Check if has 117 failure
Compressor overload to
check the cause of over
load
Secure the module and paint
with radiating silica gel evenly.
Replace the power module.
Troubleshoot the fan and PCB
terminal for 220V voltage output.
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 ...