Haier MRV5-H - Page 106

103
FFailure
code
Outdoor
digital
display tube:
32-0, 1
Indoor wired
controller:
20
Indoor unit LED status
LED5 Failure description:
Defrosting temperature sensor failure:
Tsco and Tliqsc
20 times
Outdoor unit LED status
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
MRV 5-HR series
DiagnosisT roubleshooting
2. Abnormity detection method
◆
Check if the sensor
connection is normal;
◆
Check if resistance
characteristic of the sensor is
normal;
◆
Check if the temperature
loop acquired by the PCB is
abnormal.
conditions
It is detected that the AD value
is below 11 (open circuit) or
above 1012 (short circuit)
for 60 seconds continuously,
the cooling mode operates
the sensor abnormity without
troubleshooting it, and no
alarm is given during defrosting
and within 3 minutes at the end
of defrosting.
4. Possible causes
◆
The connection of sensor is
not secure;
◆
The sensor is broken;
◆
The sensor is with
resistance drift;
◆
The temperature acquired
by PCB is not accurate.
Replace it c orrectly b y after-
sales personnel on site.
Check i f the corresponding
connector o f sensor is
normal
Check if resistance
temperature characteristic of
the sensor is normal
Check if the temperature loop
acquired by t he c omputer
board is abnormal
Replace it c orrectly by after-
sales personnel on site.
Replace it c orrectly by after-
sales personnel on site.
N
N
N
Y
Y