GREE DC INVERTER HEAT PUMP CONDENSING UNIT
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3.4.13 “HC” PFC Protection
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
After power is connected, and drive chip received PFC lead F0 that is of low level, than it is PFC module
malfunction. System will shut down for protection.
Possible reason:
■Power grid voltage is abnormal.
■Drive board PFC module is damaged.
■Drive board PFC 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 sampling 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
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