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TheAChub
Wet Alarm
Error Code F4
Applicable Models
REYQ-T Method of Error Detection
In cooling operation, detect the condition under which liquid refrigerant returns to the compressor, according to the temperature and pressure of each part. Error Decision Conditions
When the following wet state continues for a period of 90 minutes, an alert is issued. An error is defined for 120 minutes. Wet state in outdoor units When the following wet state continues for a period of 45 minutes, an alert is issued.
Wet state in some of indoor units
Supposed Causes
Defective suction pipe thermistor Defective discharge pipe thermistor Defective high pressure sensor
Defective indoor unit electronic expansion valve Dirty air filter 
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