Daikin RXYQ-TA Series, Service Manual

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SiUS341615E Troubleshooting by Error Code
Service Diagnosis 230
3.36 Wet Alarm
Error Code
F4
Applicable
Models
All outdoor unit models
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