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oL1 Internal electronic overload trip.
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity.
4. Reduce the current level so that the drive output current does
not exceed the value set by the Motor Rated Current 0-1.
ocA Over-current during deceleration:
1. Short-circuit at motor output.
2. Acceleration time too short.
3. Drive output capacity is
too small.
1. Check for possible poor insulation at the output line.
2. Increase the acceleration time.
3. Replace the drive with one that has a higher output capacity
(next HP size).
ocd Over-current during deceleration:
1. Short-circuit at motor output.
2. Deceleration time too short.
3. Drive output capacity is
too small.
1. Check for possible poor insulation at the output line.
2. Increase the deceleration time.
3. Replace the drive with one that has a higher output capacity
(next HP size).
ocn Over-current during steady state
operation:
1. Short-circuit at motor output.
2. Sudden increase in motor
loading.
3. Drive output capacity is
too small.
1. Check for possible poor insulation at the output line.
2. Check for possible motor stall.
3. Replace the drive with one that has a higher output capacity
(next HP size).
EF External Fault
1. Fault input has gone low.
2. Fault input has gone hi.
If parameter 3-2 or 3-3 is set to 7 (External Fault - N.C.) or 8
(External Fault - N.O.) and the input changes state, EF is displayed.
Clear external fault and reset the drive (reset button).
oPi Input phase fault
Displayed when the VFD detects an open phase on one of the line
inputs.
1. Check current draw on each of the lines.
2. Check fuses.
3. Check for loose terminals .
4. Check for open wires.
oPo Output phase fault
Displayed when the VFD detects an open phase on one of the line
outputs.
1. Check current draw on each of the lines.
2. Check motor windings.
3. Check for loose terminals.
4. Check for open wires.
