116
Failure code
Outdoor
digital
display tube:
51-0,1,2,3
Indoor wired
controller:
33
Indoor unit LED status
LED5F ailure 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-HR series
DiagnosisT roubleshooting
2. Abnormity detection method
◆
LEV driver chip detection
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
expansion valve is operating
Replace electronic expansion
valve coil
Replace PCB
N
Y
Y
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