Haier MRV5-H - Page 98

95
FFailure
code
Outdoor
digital
display tube:
23-0,1
Indoor wired
controller:
17
Indoor unit LED status
LED5F ailure description:
Discharging temperature sensor:
Td1and Td2 failure
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
normal.
conditions
It is detected that the AD value
is below 11 (open circuit) or
above 1012 (short circuit) for
60 seconds continuously. If
detected after 3 minutes of
compressor operation (AD
value is below 11).
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 by after-
sales personnel on site.
Check i f the correspondin g
connector of sensor is normal
Check i f resistanc e
characteristic of the sensor
is normal
Check i f the temperatur e
loop a cquired by t he
computer board is normal
Replace it c orrectly by after-
sales personnel on site.
Replace it c orrectly by after-
sales personnel on site.
N
N
Y
Y
Y