Airwell AWAU-YDV1010-H13, Service Manual

Page: 127 / 187

125
Failure code
Outdoor
digital
display tube:
20-0,1
Indoor wired
controller:
14
Indoor unit LED status
LED5 Failure description:
Defrosting temperature sensors:
Tdef1 and Tdef2 failure 20 times
Outdoor unit LED status
Normal
LED1 LED2
Normal Normal
1. Model Failure diagnosis and troubleshooting
Flow Logic III series
Diagnosis Troubleshooting
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.
3. Abnormity confirmation
conditions
It is detected that the AD value
is below 11 (open circuit) or
above 1012 (short circuit) for
60 seconds continuously, the in
abnormity will not be handled
when the sensor operates
in the cooling mode, 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 correctly by after-
sales personnel on site.
Check if the corresponding
connector of sensor is normal
Check if resistance
characteristic of the sensor
is normal
Check if the temperature
l o o p a c q u i r e d b y t h e
computer board is normal
Replace it correctly by after-
sales personnel on site.
Replace it correctly by after-
sales personnel on site.
N
N
Y
Y
Y
17. Troubleshooting