4
3 TROUBLESHOOTING GUIDE
3.1 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from
an electrical defect, another is ineffective Air Conditioning caused by a defect in the refrigeration circuit and
improper application, and the other is called the Structure Damage.
ROOM AIRCONDITIONER VOLTAGE LIMITS:
NAMEPLATE RATING MINIMUM MAXIMUM
220~240V 198V 254V
3.1.1 Water level protection function abnormal
Abnormal water level protection function includes the following: (1) There is an alarm when the water
level is normal and (2) There is no alarm for full water.
3.1.2 Automatic trouble alarm
When the pipe temperature sensor is defective, the motors of the compressor and the fan will be shut
down, and the power indicator will flash at 5 Hz.
Power indicator flashes at 5 Hz
The connector CN3 in
main PCB is loosed
Place it properly
Pipe temperature sensor trouble
Replace pipe temperature sensor
Trouble in input circuit of water
level switch of drive board
components
Water level
switch broken
Replace
switch
Broken Main
chip of PCB
com