koppel KCSS Series, Operation Manual

Page: 10 / 12

Check the following before you contact the service man, you may find the solution to your problems
and save yourself time and money. And if the problem still persists, contact your service person.
PROBLEM
No operation.
CAUSES
•
Check to see if the power supply switch is OFF.
•
Check to see if you have a power failure.
Air Conditioner runs but
does not cool.
•
Check whether the sunlight is directly shining into the room.
If yes, use curtains or blinds to prevent heat gain to the room.
•
Check whether the door and window are opened.
•
Ensure that no heating appliances have been placed under
the return air area.
•
Check the air filter for dirt.
•
Call for service if the room is not cold after running for more
than a reasonable cooling time.
Controller is not working
Call for service.
There’s a strange noise
coming from the unit.
Call for service.
Water leaking from the indoor
unit and water drain line.
Turn the unit off and call for service.
10
THE FOLLOWING ARE NORMAL CONDITIONS FOR THE UNIT.
Condensate water or water
droplets on the air outlet.
•
In Cool Mode, condensate water can sometimes be
seen forming on the air outlet due to the differences
in temperature between the room air and the outlet air.
Fan Coil Unit