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4
Troubleshooting
When troubles occur, please check the following points before contacting a repair company.
Problem
Poor cooling
performance
The unit is not working
26 / 128 EN
Possible causes
Temperature setting may be higher
than ambient room temperature
The heat exchanger on the indoor
or outdoor unit is dirty
The air filter is dirty
The air inlet or outlet of either unit
is blocked
Doors and windows are open
Excessive heat is generated by
sunlight
Too many sources of heat in
the room (people, computers,
electronics, etc.)
Low refrigerant due to leak or long-
term use
SILENCE function is activated
(optional function)
Power failure
The power is turned off
The fuse is burned out
Remote control batteries are dead
The Unit' s 3-minute protection has
been activated
Timer is activated
Solution
Lower the temperature setting
Clean the affected heat exchanger
Remove the filter and clean it
according to instructions
Turn the unit off, remove the
obstruction and turn it back on
Make sure that all doors and
windows are closed while
operating the unit
Close windows and curtains during
periods of high heat or bright
sunshine
Reduce amount of heat sources
Check for leaks, re-seal if
necessary and top off refrigerant
SILENCE function can lower
product performance by reducing
operating frequency. Turn off
SILENCE function.
Wait for the power to be restored
Turn on the power
Replace the fuse
Replace batteries
Wait three minutes after restarting
the unit
Turn timer off
Split type air conditioner / User Manual
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