16
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
