Gree U-Match Series Owner's Manual page 48

U-Match Series Cassette Type Unit
first check the following points before repair:
Failure
The unit cannot be
started.
The unit operates for a
while and then stops.
Poor cooling effect.
NOTE:
Check the above items and adopt the corresponding corrective measures. If
the air conditioner continues to function poorly, please stop the air conditioner
immediately and contact Gree's authorized local service center. Ask our
professional service staff to check and repair the unit.
1)The power supply is not connected.
2)Electrical leakage of air-conditioning unit causes
tripping of the leakage switch.
4)The operating keys are locked.
5)The control loop has failure.
1)There is obstacle in front of the condenser.
2)The control loop is abnormal.
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.
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Possible Reasons