ov on DELTA inverters: DC bus over-voltage

DELTA inverters: VFD-EL

Disconnect the supply and wait for the capacitors to discharge before opening the inverter or touching its terminals.

Common causes

1. 1Deceleration too fast, the motor regenerates into the drive
2. 2High-inertia or overhauling load (large fan, lowering hoist)
3. 3Supply voltage above the allowed range

Try first

1. 1Increase the deceleration time (Pr.01-10)
2. 2Enable over-voltage stall prevention if available
3. 3Measure the supply: 1-phase 230 V on 21A models
4. 4If it repeats on heavy loads, add a suitable braking resisto