Cause : Control Power Supply Voltage Fault comes when voltage is too low for the control drive input power. In drive models 2A0004 to 2A0056 or 4A0002 to 4A0031, L2-02 was changed from its default value without installing a Momentary Power Loss Ride-Thru unit.

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.