105
Failure code
Outdoor
digital
display tube:
34-0, 1
Indoor wired
controller:
22
Indoor unit LED status
LED5 Failure description:
Outdoor compressor discharging tempera-
ture (Td1, Td2).too high failure
20 times
Outdoor unit LED status
LED1L ED2
Normal Normal
1. Model Diagnosis and troubleshooting
MRV 5-HR series
DiagnosisT roubleshooting
2. Abnormity detection method
◆
Check if the temperature
detected via a discharging
temperature sensor is correct.
◆
Check the unit for leakage
◆
Check if the outdoor unit
SV31, SV32, LEVb, etc. can be
normally turned on;
◆
Check the outdoor heat
blockage and air inlet & outlet
short circuit when cooling.
◆
Check the indoor heat
blockage and air inlet & outlet
short circuit when heating.
conditions
4. Possible causes
◆
The oil temperature sensor
is with resistance drift;
◆
The refrigerant in the system
◆
The outdoor unit LEVb,
SV31 and SV32 cannot be
turned on normally.
◆
The unit condensation
side is with poor heat transfer
function;
◆
The operation environment
is beyond the allowed range.
Replace the discharging
temperature sensor by after-
sales personnel on site.
Check if the resistance of
discharging t emperatur e
sensor is correct.
Check if the refrigerant in the
Check i f the outdoor heat
exchange is normal when
cooling, and check i f the
indoor heat exchange i s
normal when heating.
Check i f the outdoor uni t
LEVb, SV31 and SV32 cannot
be turned on normally.
Check i f the allowed operation
range is exceeded.
Use the unit in accordance with
its allowed operation range.
Replace it correctly b y after-
sales personnel o n site a nd
ensure the refrigerant is enough.
Replace it c orrectly by after-
sales personnel on site.
Troubleshoot and replac e
it c orrectly b y after-sales
personnel on site.
Y
N
Y
N
N
N
Y
Y
Y
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