Error (Alarm) Definitions - Mitsubishi FR-E500 Series Instruction Manual

5.1.2 Error (alarm) definitions

(1) Major faults
When the protective function is activated, the inverter output is shut off and the alarm is
output.
FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
OC During Acc
Overcurrent shut-off during acceleration
When the inverter output current reaches or exceeds approximately
200% of the rated current during acceleration, the protective circuit is
activated to stop the inverter output.
Check for sudden acceleration.
Check for output short-circuit/ground fault.
Increase the acceleration time.
Stedy Spd OC
Overcurrent shut-off during constant speed
When the inverter output current reaches or exceeds approximately
200% of the rated current during constant speed, the protective
circuit is activated to stop the inverter output.
Check for sudden load change.
Check for output short-circuit/ground fault.
Keep load stable.
OC During Dec
Overcurrent shut-off during deceleration
When the inverter output current reaches or exceeds approximately
200% of the rated current during deceleration (other than
acceleration or constant speed), the protective circuit is activated to
stop the inverter output.
Check for sudden speed reduction.
Check for output short-circuit/ground fault.
Check for too fast operation of motor's mechanical brake.
Increase the deceleration time.
Adjust brake operation.
OV During Acc
Regenerative overvoltage shut-off during acceleration
If regenerative energy causes the inverter's internal main circuit DC
voltage to reach or exceed the specified value, the protective circuit
is activated to stop the inverter output. It may also be activated by a
surge voltage generated in the power supply system.
Check for too slow acceleration.
Decrease the acceleration time.
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PROTECTIVE FUNCTIONS
5