High Pressure Control In Cooling - Daikin FDMQ-R Series Service Manual

SiUS071735EA

4.21 High Pressure Control in Cooling

F6
Error Code
Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the
Detection temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Error Decision
The temperature sensed by the outdoor heat exchanger thermistor rise above 57.5 ~ 61°C
Conditions (135.5 ~ 141.8°F) (depending on the model).
Supposed
Causes
Service Diagnosis
Installation space not large enough
Dirty outdoor heat exchanger
Defective outdoor fan motor
Defective stop valve
Defective electronic expansion valve or coil
Defective outdoor heat exchanger thermistor
Defective outdoor unit PCB
Troubleshooting
88