oL on DELTA inverters: Drive overload

DELTA inverters: VFD-EL، MS300

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

Common causes

1. 1Load above the drive rating for too long
2. 2Heavy, frequent acceleration
3. 3Torque boost or V/f set too high

Try first

1. 1Measure the running current and compare with the drive rating
2. 2Increase the acceleration time
3. 3Reduce the load or choose a larger drive