Control Power Supply Voltage Fault

What does Uv2 mean?

The voltage supplied to the control drive input power is too low. This can occur if parameter L2-02 is changed from its default value without installing a Momentary Power Loss Ride-Thru unit, or if there is damage to the control power supply wiring or internal control circuitry, impacting drive control stability.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If internal circuitry damage is suspected, cycle power again. If the problem continues, replace either the control board or the entire drive; contact Yaskawa for assistance.