Gree U-Match 5 Series, Manual

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GREE U-Match 5 SERIES UNIT SERVICE MANUAL
76
3.4.22 “HC” PFC Protection
Error display: ODU mainboard, IDU wired controller and IDU receiver light board will display HC
Error judgment condition and method:
After power is connected, and drive chip received IPM lead F0 that is of low level, than it is IPM module
malfunction. System will shut down for protection.
Possible reason:
■Power grid voltage is abnormal.
■
Drive board PFC module is damaged.
■
Drive board IPM module’s 15V power supply is lower than 13.5V.
■
Drive board PWM signal for PFC and the corresponding element are abnormal.
■Drive board PFC current sampling circuit element is damaged or drive chip current sampli
ng AD terminal is
abnormal.
Troubleshooting
：
HC
PFC protection
Normal protection
Check whether power grid voltage is
normal ?
NO
Drive board PFC is damaged ?
YES
Replace the drive board .
YES