Haier MRV 5-RC AS072MNERA User Manual

181
Failure code
Outdoor
digital
display tube:
27-0, 1
Indoor wired
controller:
1B
Indoor unit LED status
LED5 Failure description:
Outdoor compressor oil temperature too
high failure(Toil1 and Toil2)
20 times
Outdoor unit LED status
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis Troubleshooting
2. Abnormity detection method
◆
Check if the temperature
detected by the oil temperature
sensor is correct;
◆
Check the unit for leakage
or insufcient refrigerant;
◆
Check if the outdoor unit
SV31, SV32, LEVb, etc. can be
normally turned on;
◆
Check the outdoor heat
exchanger of this unit for lth
blockage and inlet & outlet air
blockage.
◆
Check the indoor heat
exchanger of this unit for lth
blockage and inlet & outlet air
blockage when cooling.
3. Abnormity conrmation
conditions
Toil1/Toil2≥120°C.
4. Possible causes
◆
The oil temperature sensor
is with resistance drift;
◆
The refrigerant in the system
is insufcient;
◆
The outdoor unit LEVb,
SV31, SV32, etc. 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 oil temperature
sensor by after-sales personnel
on site.
Check if the resistance of oil
temperature sensor is correct
Check if the refrigerant in the
system is with leakage or insufcient
Check if the outdoor heat
exchange is normal when cooling,
and check if the indoor
heating is normal when heating
Check if the outdoor unit LEVb, SV31
and SV32 can be turned on normally
Check if it is beyond the
allowed operation range of unit.
Use the unit in accordance
with its allowed range.
Replace it correctly by after-
sales personnel on site and
ensure refrigerant is enough.
Replace it correctly by after-
sales personnel on site.
Troubleshoot and replace
it correctly by after-sales
personnel on site.
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Haier MRV 5-RC AS072MNERA Specifications

General

Brand	Haier
Model	MRV 5-RC AS072MNERA
Category	Heat Pump
Language	English