Haier MRV 5-RC VP1-112B Service Manual page 201

Failure code
Outdoor Indoor unit LED status
digital
display tube:
51-0,1,2,3
Indoor wired
Outdoor unit LED status
controller:
33
1. Model
MRV 5-RC series
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
Normal
Diagnosis and troubleshooting
Diagnosis
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
LED5 Failure description:
LEVa1,2 and LEVb,c over current protection
20 times
LED1 LED2
Normal
Y
N
Y
198
Troubleshooting
Replace electronic expansion
valve coil
Replace PCB