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Troubleshooting
When troubles occur, please check the following points before contacting a repair company.
Problem
Possible Causes
Solution
Poor Cooling
Performance
Temperature setting may
be higher than ambient
room temperature
Lower the temperature setting
The heat exchanger on the
indoor or outdoor unit is
dirty
Clean the affected heat exchanger
The air filter is dirty
Remove the filter and clean it
according to instructions
The air inlet or outlet of
either unit is blocked
Turn the unit off, remove the
obstruction and turn it back on
Doors and windows are
open
Make sure that all doors and
windows are closed while
operating the unit
Excessive heat is generated
by sunlight
Close windows and curtains
during periods of high heat or
bright sunshine
Too many sources of heat
in the room (people,
computers, electronics,
etc.)
Reduce amount of heat sources
Low refrigerant due to leak
or long-term use
Check for leaks, re-seal if
necessary and top off refrigerant
SILENCE function is
activated(optional function)
SILENCE function can lower
product performance by reducing
operating frequency. Turn off
SILENCE function.
Troubleshooting
Page 17
Problem
Possible Causes
Solution
The unit is not
working
Power failure
Wait for the power to be
restored
The power is turned off
Turn on the power
The fuse is burned out
Replace the fuse
Remote control batteries are
dead
Replace batteries
The Unit’s 3-minute protection
has been activated
Wait three minutes after
restarting the unit
Timer is activated
Turn timer off
The unit starts and
stops frequently
There’s too much or too little
refrigerant in the system
Check for leaks and
recharge the system with
refrigerant.
Incompressible gas or
moisture has entered the
system.
Evacuate and recharge the
system with refrigerant
The compressor is broken Replace the compressor
The voltage is too high or
too low
Install a manostat to
regulate the voltage
Poor heating
performance
The outdoor temperature is
exetremtly low
Use auxiliary heating
device
Cold air is entering through
doors and windows
Make sure that all doors
and windows are closed
during use
Low refrigerant due to leak or
long-term use
Check for leaks, re-seal
if necessary and top off
refrigerant
Indicator lamps
continue flashing
The unit may stop operation or continue to run safely. If
the indicator lamps continue to flash or error codes appear,
wait for about 10 minutes. The problem may resolve itself.
If not, disconnect the power, then connect it again. Turn
the unit on.
If the problem persists, disconnect the power and contact
your nearest customer service center.
Error code appears in
the window display
of indoor unit:
•
E0, E1, E2…
•
P1, P2, P3…
•
F1, F2, F3…
NOTE:
If your problem persists after performing the checks and diagnostics above, turn off your
unit immediately and contact an authorized service center.
Troubleshooting
