DC Inverter U-match Series Floor Ceiling Type Unit
28
first check the following points before calling for repair:
Table 7.1
Failure Possible
Reasons
The unit wo
n’t start
ķ
. The power supply is not connected.
ĸ
. Electrical
short
of
air-conditioning unit causes tripping of the
circuit breaker.
Ĺ
. The operating keys are locked.
ĺ
. The control loop has failed.
The unit operates for a while
and then stops.
ķ
.
The air flow for the ODU condenser is blocked..
ĸ
. The control loop experienced failure.
Ĺ
. Cooling operation is selected when the outdoor ambient
temperature is above 46.1°C (115°F).
Poor cooling performance.
ķ
. The air filter is dirty or blocked.
ĸ
. There is heat source or too many people inside the room.
Ĺ
. The door or window is open.
ĺ
. There is obstacle at the air intake or outlet.
Ļ
. The set temperature is too high.
ļ
. There is refrigerant leakage.
Ľ
. The room sensor has malfunctioned.
Poor heating performance.
ķ
. The air filter is dirty or blocked.
ĸ
. The door or window is not firmly closed.
Ĺ
. The set room temperature is too low.
ĺ
. There is refrigerant leakage.
Ļ
. The outdoor ambient temperature is lower than -5°C (23°F).
ļ
. Control loop experienced a failure.
Note:
Once the above listed possible reasons have been eliminated, please turn off
the air conditioner and call for a qualified service technician. Only qualified service
technician should repair the unit.
