Troubleshooting For Outdoor Unit; Anti-Icing Control For Indoor Unit - Daikin 2MKS40G2V1B Service Manual

Troubleshooting for Outdoor Unit

7. Troubleshooting for Outdoor Unit

7.1

Anti-icing Control for Indoor Unit

A5
Remote
Controller
Display
Method of 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
Malfunction
shut-down room.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
235
In cooling operation, both the condition (A) and (B) are met for 5 minutes.
(A) Stop room thermistor temperature – Indoor heat exchanger temperature ≥ 10°C
(B) Indoor heat exchanger temperature ≤ –1°C
If the error repeats 4 times, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Wrong wiring or piping
Defective electronic expansion valve
Short-circuited air
Defective indoor heat exchanger thermistor
Defective room temperature thermistor
SiBE12-816_D
Service Diagnosis