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Errors (Alarms)
PROTECTIVE FUNCTIONS
6
6.1.1 Error (alarm) definitions
(1) Major failures
When the protective function is activated, the inverter output is shut off and an alarm is
output.
Operation Panel
Indication
0C1 FR-PU04 OC During Acc
Name Overcurrent shut-off during acceleration
Description
When the inverter output current reaches or exceeds approximately 200%
of the rated inverter current during acceleration, the protective circuit is
activated to stop the inverter output.
Check point
Check for too slow acceleration.
Check for output short-circuit/ground fault.
Corrective action Decrease the acceleration time.
Error code H10
Operation Panel
Indication
0C2 FR-PU04 Stedy Spd OC
Name Overcurrent shut-off during constant speed
Description
When the inverter output current reaches or exceeds approximately 200%
of the rated inverter current during constant speed operation, the protective
circuit is activated to stop the inverter output.
Check point
Check for sudden load change.
Check for output short-circuit/ground fault.
Corrective action Keep load stable.
Error code H11
Operation Panel
Indication
0C3 FR-PU04 OC During Dec
Name Overcurrent shut-off during deceleration
Description
When the inverter output current reaches or exceeds approximately 200%
of the rated inverter current during deceleration (other than acceleration or
constant speed), the protective circuit is activated to stop the inverter
output.
Check point
• Check for sudden speed reduction.
• Check for output short-circuit/ground fault.
• Check for too fast operation of the motor's mechanical brake.
Corrective action
Increase the deceleration time.
Adjust brake operation.
Error code H12
