198
Failure code
Outdoor
digital
display tube:
51-0,1,2,3
Indoor wired
controller:
33
Indoor unit LED status
LED5
Failure description:
LEVa1,2 and LEVb,c over current protection
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Diagnosis and troubleshooting
MRV 5-RC series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
LEV driver chip detection
3. Abnormity confirmation
conditions
LEV driver chip detection
4. Possible causes
◆
The wires of electronic
expansion valve coil short
circuit
◆
LEV drive output circuit
anomalies
Check if the wires of electronic
expansion valve coil is short
circuit
Check if the PCB LED3 is
flashing when the electronic
expansion valve is operating
Replace electronic expansion
valve coil
Replace PCB
N
Y
Y
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 ...