GREE DC INVERTER HEAT PUMP CONDENSING UNIT
47
3.4.20 “PA” AC Current Protection
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
If input current value exceeds the set protection value, then it can be judged that AC current protection
occurs and system will shut down for protection.
Possible reason:
■System is heavy-loaded and compressor current is too large.
■Grid voltage is abnormal.
■PFC module is damaged.
■Drive board PFC current sampling circuit element is damaged or drive chip PFC current sampling AD terminal is
abnormal.
Troubleshooting
：
3.4.21 “Pc” Driver Current Error
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
After power charging, if offset voltage average is detected to exceed 12.5% of 1.65V in 1s, then it can be
judged that current detection (or current sensor) circuit is faulted. System will shut down for protection.
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