117
Failure code
Outdoor
digital
display tube:
52-0,1,2,3
Indoor wired
controller:
34
Indoor unit LED status
LED5 Failure description:
LEVa1,2 and LEVb,c open circuit
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 electronic expansion
valve coil connector is
disengaged or misplaced
◆
Electronic expansion valve
coil harness breaks
◆
LEV drive circuit is open
Reconnected by a fter-sales
personnel on site.
Check if the electronic expansion
valve coil terminal plug well
Check if the electronic expansion
valve coil harness, the terminal is
good
Check whether t he P CB L EV
circuit is damaged
Replace the electronic
expansion valve coil by after-
sales personnel on site.
Replace PCB
N
N
Y
Y
Y
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