Mitsumi electronic FR-F520-0.75K, 55K Errors Alarms, Error alarm definitions, Major faults

STOP

RESET

5.1 Errors (Alarms)

PROTECTIVE FUNCTIONS

If any fault has occurred in the inverter, the corresponding protective function is activated to bring the inverter to an alarm stop and automatically give the corresponding error (alarm) indication on the PU display.

If your fault does not correspond to any of the following errors or if you have any other problem, please contact your sales representative.

•When the protective function is activated, take the corresponding corrective action, then reset the inverter, and resume operation.

•Resetting method

When the protective function is activated and the inverter has stopped its output, the inverter output is kept stopped (and the motor is coasted to a stop). Unless reset, therefore, the inverter cannot restart. To reset, use any of the following methods: switch power off once, then on again; short reset terminal RES-SD for

more than 0.1 seconds, then open; or press the key of the operation panel or parameter unit (use the help function of the parameter unit). If RES-SD are kept shorted, the operation panel shows "Err." and the parameter unit indicates that the inverter is being reset.

5.1.1 Error (alarm) definitions

(1) Major faults

When the protective function is activated, the inverter output is shut off and the alarm is output.

Operation Panel	E.OC1		FR-PU04	OC During Acc
Indication
Name	Overcurrent shut-off during acceleration
	When the inverter output current reaches or exceeds approximately 150% of the
	rated current during acceleration, the protective circuit is activated to stop the
Description	inverter output.
	This indication also appears when the start signal is input with power supplied to
	only the R1 <L11> and S1 <L21> terminals.
	Check for sudden acceleration.
Check point	Check for output short circuit.
	Check that main circuit power (R, S, T <L1, L2, L3>) is supplied.
	•	Increase the acceleration time.
Corrective action	•	If "E.OC1" is always lit at a start, disconnect the motor once and then start the
		inverter. If "E.OC1" is still lit, contact your sales representative.

•Supply main circuit power (R, S, T <L1, L2, L3>).

Operation Panel	E.OC2	FR-PU04	Stedy Spd OC
Indication
Name	Overcurrent shut-off during constant speed
	When the inverter output current reaches or exceeds approximately 150% of the
Description	rated current during constant speed, the protective circuit is activated to stop the
	inverter output.
Check point	Check for sudden load change.
	Check for output short circuit.
Corrective action	Keep load stable.

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