Hitachi E7 fault code meaning

Series: J100-E2

Over. V

AC drive

Meaning: DC smoothing circuit overvoltage | Rapid deceleration; motor forced to rotate by the load; grounding fault. | Increase deceleration time; impossible to apply to continuous regenerative load; check output wiring and motor for grounds.

Possible causes

Source: Hitachi J100-E2 Instruction Manual P10