55
Problem
Cause
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.
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…
If the trouble has not been corrected, please contact your supplier. Be sure to inform them of the detailed
malfunctions and unit model.
G
NOTE!
Reparation of the device should only be done by an authorized air conditioning engineer.
GB
Q_man_S(C)46xx-S(C)54xx–S(C)JAxx22 SCAN ('21) V1.indd 55
Q_man_S(C)46xx-S(C)54xx–S(C)JAxx22 SCAN ('21) V1.indd 55
02-11-2021 11:32
02-11-2021 11:32
