Troubleshooting
If your air-conditioning unit suffers from abnormal operation or failure, please rst check the following
points before repair:
Failure Possible Reasons
The unit cannot be
started.
The unit operates
for a while and then
stops.
Poor cooling effect.
Poor heating effect
1. The power supply is not connected.
2. Electrical leakage of air-conditioning unit causes tripping of
leakage switch.
3. The operating buttons are locked.
4. The control loop has failure.
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 43˚C.
1. The air lter 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 thus cooling is hindered.
6. There is refrigerant leakage.
7. The performance of room temperature sensor becomes worse.
1. The air lter is dirty or blocked.
2. The door or window is not rmly closed.
3. The set room temperature is too low thus heating is hindered.
4. There is refrigerant leakage.
5. The outdoor ambient temperature is lower than -5˚C.
6. Control line 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, stop the operation of
the unit immediately and contact the local service agency designated by SHARP. Only ask
professional serviceman to check and repair the unit.
INSTRUCTIONS OF UNIT INSTALLATION
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