Service Manual

Troubleshooting SiUS071735E
87 Service Diagnosis
4.21 High Pressure Control in Cooling
Error Code F6
Method of Error
Detection
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the
temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Error Decision
Conditions
The temperature sensed by the outdoor heat exchanger thermistor rise above 57.5 ~ 61°C
(135.5 ~ 141.8°F) (depending on the model).
Supposed
Causes
 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