Troubleshooting guide

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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) v Power failure
v The power supply is turned OFF v The fuse in the power supply is gone v The earth leakage breaker is gone v The wiring phase of power supply is
mistaken
v Press the switch (ON) button after power
restoration.
v Turn the power supply ON v Replace the fuse v Put in the earth leakage breaker v Modify the wiring phase of power supply
Air flow out but it does not cool enough
Switch (ON) v Improper temperature adjustment
v The filter is filled with dust and dirt v There are some obstacles at the air
inlet and outlet of the units
v Windows and doors are open
v After checking the set temperature and inlet
temperature adjust thermostat (23WA)
v Clean the filter v Remove the obstacle v Close the windows and doors
Cool air does not come out
Switch (ON) v The restart-preventing circuit is in
operation for 3 minutes
v 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
v The set temperature of thermostat
is too high
v The room temperature is excessively
low for cooling
v For temperature control, decrease the set
temperature at cooling
v Can not be operated as it is out of
temperature control range
Compressor run but stops immediately
v Air outlet and inlet are blocked v Remove blocking matter
Water or steam is discharged from the unit
v At cooling, water which places to cooling
piping and piping connection part drops
v It is not a breakdown. Please use it as it is