Troubleshooting Si01-501
120 Service Diagnosis
4.12 High Pressure Control in Cooling
Remote
Controller
Display
F6
Method of
Malfunction
Detection
High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the
temperature being sensed by the heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
Activated when the temperature being sensed by the heat exchanger thermistor rises above
69.5°C. (Deactivated when the temperature drops below 55°C.)
Supposed
Causes
The installation space is not large enough.
Faulty outdoor unit fan
Faulty electronic expansion valve
Faulty outdoor unit PCB
Faulty stop valve
Dirty heat exchanger
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