SiBE121021_C Troubleshooting for Outdoor Unit
Service Diagnosis 333
7. Troubleshooting for Outdoor Unit
7.1 Anti-icing Function
Remote
Controller
Display
A5
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
i
5
h
Method of
Malfunction
Detection
During cooling operation, indoor unit icing is detected by checking the temperatures sensed by
the indoor heat exchanger thermistor and room temperature thermistor that are located in a
shut-down room.
Malfunction
Decision
Conditions
îš„
In cooling operation, the both conditions (A) and (B) are met for 5 minutes.
(A) Room temperature – Indoor heat exchanger temperature
≥
10°C
(B) Indoor heat exchanger temperature
≤
–1°C
îš„
If the error repeats 4 times, the system is shut down.
îš„
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
îš„
Wrong wiring or piping
îš„
Defective electronic expansion valve
îš„
Short-circuited air
îš„
Defective indoor heat exchanger thermistor
îš„
Defective room temperature thermistor
To Next Page
Loading...
Need help?
General
