Cause : Control Power Supply Voltage Fault comes when voltage is too low for the control drive input power. L2-02 changed from its default value in drive that is 7.5 kW or smaller without installing a Momentary Power Loss Ride-Thru.

1. Correct the setting to L2-02 or install an optional Momentary Power Loss Ride-Thru unit.
2. Control power supply wiring is damaged.
3. Cycle power to the drive. Check if the fault reoccurs.
4. If the problem continues, replace the control board, the entire drive, or the control power supply.