Freeze-Up Protection Control Or Heating Peak-Cut Control - Daikin RMXS-L Series Service Manual

SiUS181305E
4.2

Freeze-up Protection Control or Heating Peak-cut Control

A5
Error Code
 Freeze-up protection control
Method of Error
Detection
 Heating peak-cut control
 Freeze-up protection control
Error Decision
Conditions
 Heating peak-cut control
 Short-circuited air
Supposed
 Clogged air filter of the indoor unit
Causes
 Dust accumulation on the indoor heat exchanger
 Defective indoor heat exchanger thermistor
 Defective indoor unit PCB
Troubleshooting
During cooling operation, the freeze-up protection control (operation halt) is activated according
to the temperature detected by the indoor heat exchanger thermistor.
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.)
During cooling operation, the indoor heat exchanger temperature is below 0°C (32°F).
During heating operation, the indoor heat exchanger temperature is above 65°C (149°F).
Troubleshooting for CTXS, FTXS, CDXS, FDXS Series
158