Gree GWC User Manual

67
Installation and Maintenance
Service Manual
4. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8
Main detection points:
● Instant energization afte de-energization while the capacitordischarges slowly?
● The zero-cross detectioncircuit of the mainboard is dened abnormal?
Malfunction diagnosis process:
Turn power off for
1minute,the turn
back on
The unit returns to normal.
Conclusion:U8 is displayed due to
power off/on while the
capacitor discharges slowly.
U8 is still
displayed
The zero-cross detection circuit
of the mainboard is dened
abnormal.Replace the mainboard
with the same model
Yes
No
Start
End

Gree GWC Specifications

General

Power Supply	220-240V, 50Hz
Type	Split
Refrigerant	R410A
Features	Auto Restart, Sleep Mode, Turbo Mode
EER (Energy Efficiency Ratio)	3.5
Noise Level	50 dB (Outdoor)
Cooling Capacity	12000 BTU/h
Heating Capacity	12000 BTU/h
Weight	Indoor: 9 kg, Outdoor: 30 kg