16 | Troubleshooting
6 720 869 160 (2016/12)
Owner’s Manual
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
SILENCE function can lower product
performance by reducing operating
frequency. Turn off SILENCE function.
