SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 253
5.32 Wet Alarm
Applicable
Models
All outdoor unit models
Error Code F4
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 outdoor unit is in wet state for consecutive A minutes, an alarm will be issued, and
if the wet state continues for consecutive B minutes, an error is confirmed.
When some of the indoor units are in wet state for consecutive C minutes, an alarm will be
issued.
Supposed
Causes
Defective suction pipe thermistor
Defective discharge pipe thermistor
Defective high pressure sensor
Defective indoor unit electronic expansion valve
Dirty air filter
4/5/10/12 HP 6/8 HP
A (minutes) 90 180
B (minutes) 120 240
C (minutes) 45 180
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