Daikin FTXS20G2V1B - Freeze-Up Protection Control or Heating Peak-Cut Control

Troubleshooting SiENBE04-808_A
105 Service Diagnosis
4.3 Freeze-up Protection Control or Heating Peak-cut
Control
Remote Control
Display
A5
Method of
Malfunction
Detection
 Freeze-up protection control
During cooling operation, the freeze-up protection control (operation halt) is activated
according to the temperature detected by the indoor heat exchanger thermistor.
 Heating peak-cut control
During heating operation, the temperature detected by the indoor heat exchanger thermistor
is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)
Malfunction
Decision
Conditions
 Freeze-up protection control
During cooling operation, the indoor heat exchanger temperature is below 0°C.
 Heating peak-cut control
During heating operation, the indoor heat exchanger temperature is above 65°C
Supposed
Causes
 Short-circuited air
 Clogged air filter of the indoor unit
 Dust accumulation on the indoor heat exchanger
 Defective indoor heat exchanger thermistor
 Defective indoor unit PCB
SiENBE04-808_A.pdf 117 21/02/2011 13:20:02