DC Inverter U-match Series Floor Ceiling Type Unit
28
first check the following points before repair:
Table 7.1
Failure
Possible Reasons
The unit cannot be started.
①
. The power supply is not connected.
②
. Electrical leakage of air-conditioning unit causes tripping of
the leakage switch.
③
. The operating keys are locked.
④
. The control loop has failure.
The unit operates for a while
and then stops.
①
. There is obstacle in front of the condenser.
②
. The control loop is abnormal.
③
. Cooling operation is selected when the outdoor ambient
temperature is above 46.1°C(115
℉
).
Poor cooling effect.
①
. The air filter is dirty or blocked.
②
. There is heat source or too many people inside the room.
③
. The door or window is open.
④
. There is obstacle at the air intake or outlet.
⑤
. The set temperature is too high.
⑥
. There is refrigerant leakage.
⑦
. The performance of room temperature sensor becomes
worse.
Poor heating effect.
①
. The air filter is dirty or blocked.
②
. The door or window is not firmly closed.
③
. The set room temperature is too low.
④
. There is refrigerant leakage.
⑤
. The outdoor ambient temperature is lower than -5°C (23
℉
).
⑥
. Control loop is abnormal.
Note:
After carrying out the check of the above items and taking relevant measures
to solve the problems found but the air-conditioning unit still does not function well,
please stop the operation of the unit immediately and contact the local service
agency designated by KingHome. Only ask professional serviceman to check and repair
the unit.
