34
Before you ask for repair service, check the following points:
State of Machine
Switch box
(Field supply)
Cause
Troubleshooting
Power failure.
Press the switch [ON] button after power
restoration
The power supply is turned OFF.
Turn the power supply ON.
The fuse in the power supply is gone.
Replace fuse.
The earth leakage breaker is gone.
Put in the earth leakage breaker.
It does not run.
Switch [ON]
The wiring phase of power supply is mistaken.
Modify the wiring phase of power supply.
Improper temperature adjustment.
After checking the set temperature and inlet
temperature adjust thermostat (23WA)
The filter is filled with dust and dirt.
Clean up the filter.
There are some obstacles at the air inlet and
outlet of the units.
Remove.
Air flows out but
it does not cool
enough.
Switch [ON]
Windows and doors are closed.
Close.
Cool air does
not come out.
Switch [ON]
The restart-preventing circuit is in operation for
3 minutes.
Wait for a while.
(To protect the compressor, a 3-minute restart-
preventing circuit is built into the unit.
Therefore, there are occasions sometimes when
the compressor does not start running
immediately. There are cases when it does not
run for as long as 3 minutes.)
The set temperature of thermostat is
excessively high for cooling.
For temperature control, decrease the set
temperature at cooling.
Fan runs but compressor does not
run.
The room temperature is excessively low for
cooling.
Can not be operated as it is out of temperature
control range.
Compressor runs but stops
immediately.
Air outlet and inlet are blocked.
Remove blocking matter.
Water or steam is discharged from
the unit.
At cooling, water which places to cooling
piping and piping connection part drops.
It is not a breakdown.
Please use it as it is.
13. TROUBLESHOOTING