Restore AC power supply
Replace fuse
Mechanical check
• Correct defects.
• Replace the switch if
defective.
Replace control board
Normal
Abnormal
ON
OFF
Not blown
Blown
Uncorrected
The unit does not operate
Start
Check AC power supply
Has the fuse blown out?
Is the float switch turned on?
Control board connector check
With the power plug removed from the
receptacle, remove and insert each connector
two to three times to improve its contact. Then,
insert the power plug into the receptacle to
make an operation check. Make sure that the
flat cable and the connectors are inserted
straight.
The compressor does not operate in Air purifier
mode.
Fan does not start
Compressor does not start
Unit does not run
Fan motor failure
Action: Replace
the fan motor
Compressor failure
Action: Replace the compressor
Float switch operation check
Power button
operation check
Control board leadwire
connection check
Control board failure
Action: Replace
the control board
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