ASCON Service Guide Book
87
Rooftop: Troubleshooting Guide
Before you ask for repair service, check the following points
Symptoms Switch Box
(Field Supply)
Possible Causes Troubleshooting
It does not run Switch (ON)
•
Power failure
•
The power supply is
turned OFF
•
The fuse in the power
supply is gone
•
The earth leakage
breaker is gone
•
The wiring phase of
power supply is mistaken
•
Press the switch (ON)
button after power
restoration.
•
Turn the power supply ON
•
Replace the fuse
•
Put in the earth leakage
breaker
•
Modify the wiring phase of
power supply
Air flow out but
it does not cool
enough
Switch (ON)
•
Improper temperature
adjustment
•
The filter is filled with dust
and dirt
•
There are some obstacles
at the air inlet and outlet
of the units
•
Windows and doors are
open
•
After checking the set
temperature and inlet
temperature adjust
thermostat (23WA)
•
Clean the filter
•
Remove the obstacle
•
Close the windows and
doors
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
minutes 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)
Fan runs but compressor does not
run
•
The set temperature of
thermostat is too high
•
The room temperature is
excessively low for
cooling
•
For temperature control,
decrease the set
temperature at cooling
•
Can not be operated as it is
out of temperature control
range
Compressor run 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
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