Gree U-Match 5 Series Manual page 63

GREE U-Match 5 SERIES UNIT SERVICE MANUAL
Possible reason：
■Cut-off valve of ODU is not fully opened;
■Electronic expansion valve is abnormal;
■Outdoor or indoor fan is not working properly;
■IDU filter or air duct is blocked (cooling mode);
■Ambient temperature exceeds allowable operation range;
■Refrigerant charging amount is insufficient;
■System pipeline is blocked;
Troubleshooting：
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