Haier MRV5-H - Page 110

107
Failure code
Outdoor
digital
display tube:
36-0, 1
Indoor wired
controller:
24
Indoor unit LED status
LED5 Failure description:
Outdoor compressor oil temperature (Toil1,
Toil2) too low failure
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
◆
Check if the temperature
detected by the oil temperature
sensor is correct.
◆
Check if the outdoor unit
SV31, SV32, LEVb, etc.
are with abnormal leakage
and check if the detected
temperature is correct;
◆
Check if the shutdown
indoor unit LEV of unit is closed
tightly, and if the running indoor
unit fan operates normally.
conditions
°C lasts for
5min.
4. Possible causes
◆
The probe of oil temperature
sensor falls off or is with
unsecure connection;
◆
The probe of oil temperature
sensor is misplaced;
◆
The oil temperature sensor
is with resistance drift;
◆
The outdoor unit LEVb,
SV31 and SV32 are with
leakage;
◆
The terminal of outdoor
unit LEVa1, 2 and LEVb is
connected incorrectly;
◆
For the unit, there is LEV
leakage in shutdown indoor
unit and non-operation of fan in
operating indoor unit;
◆
The system refrigerant is too
much
◆
The operation environment
is beyond the allowed range.
Check i f the resistance o f oil
temperature sensor is correct.
Check i f the sensor probe i s secure
and if the position is correct.
Check if the indoor unit LEV of “OFF”
is closed tightly and if the indoor unit
fan of “ON” is normal.
Check i f the terminal o f
outdoor unit LEVb, SV31
and S V32 is c onnected
properly or is closed tightly.
Check if the outdoor unit LEVa1, 2
and LEVb are connected properly
and correctly when heating.
Check i f the unit i s filled w it h
excessive refrigerant.
Fill with regular r efrigerant in
accordance with standard quantity.
Replace the oil temperatur e
sensor by after-sales personnel
on site.
Replace it c orrectly b y after-sales
personnel on site.
[Note]: Check i f it i s inserted ,
connected and i ntersected w ith
another c ompresso r, e speciall y
when a single compressor operates.
Replace the poor valve (with
leakage) and fan correctly by
after-sales personnel on site.
Replace the poor v alve ( with
leakage) and f an c orrectly b y
after-sales personnel on site.
Replace it correctly by after-sales
personnel on site.
Check i f the computer boar d
can normally control the related
electronic expansion v alve a nd
solenoid valve, if not, replace it.
Y
N
Y
N
N
N
Y
N
N
Y
Y
Y