The motor has overheated.
Reduce the load or operating frequency.
The load is greater than the
inverter rated capacity.
Replace the inverter with a larger model.
Pr.42 and/or Pr.43 (Eth) are set
too low.
The inverter has been operated
at low speed for an extended
duration.
Verify motor cooling is adequate at low speed
operation. Add supplemental cooling to motor.
The output contactor connecting
the motor has a faulty
connection.
Check/Replace the contactor on the output side.
The output wiring is faulty.
The input contactor connecting
the power source has a faulty
connection.
Check/Replace the contactor on the input side.
The input wiring is faulty.
The DC link capacitors need to
be replaced.
Replace the DC link capacitors. Contact the
Benshaw technial support center.
The load is greater than the
rated motor capacity.
Replace the motor and inverter with models that
have increased capacity.
The torque boost level is too
high.
Reduce the torque boost levels (dr.15 ~ dr.17).
The torque boost level is too low.
Increase the torque boost levels (dr.15 ~ dr.17).
There is a problem with the
cooling system.
Check for obstructions of air flow (inlet, outlet, or
vents).
The inverter cooling fan has
failed.
The ambient temperature is too
high.
Keep the ambient temperature below 50.
Output wiring is short-circuited.
There is a short in the output
transistors (IGBT's).
Check IGBT for short circuits. If shorted, do not
operate the inverter. Contact the Benshaw technial
support center.
A ground fault has occurred in
the inverter output wiring.
The motor insulation is
damaged.
There is a fault with the internal
temperature sensor.
Contact the Benshaw technial support center.
The ambient temperature is too
low.
Keep the ambient temperature above –10.
There is an obstruction in the fan
or air vent.
Remove the obstruction from the air inlet or outlet.
The cooling fan needs to be
replaced.
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