Hitachi GND Flt fault code meaning

Series: HFC-VWS

Ground fault protection

AC drive

Meaning: Unbalanced current due to a ground fault detected between the inverter output section and the motor; output is cut off. Protects the inverter, not the human body (use an earth leakage breaker). When a ground fault occurs an overcurrent alarm (OC. ACCEL/DECEL/DRIVE) may be indicated as well. | Check whether the inverter module is damaged or the motor or a connection line has a ground fault: replace the inverter module; correct the ground fault.

Possible causes

Source: Hitachi HFC-VWS Instruction Manual P50