Mitsubishi FR - S500 Errors Alarms, Error alarm definitions, Major failures, OC1 FR-PU04

3.1 Errors (Alarms)

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.

Retention of alarm output signal......When the magnetic contactor (MC) provided on

the power supply side of the inverter is opened at the activation of the protective function, the inverter's control power will be lost and the alarm output will not be held.

Alarm indication...............................When the protective function is activated, the

operation panel display automatically switches to the above indication.

Resetting method ............................When the protective function is activated, the

inverter output is kept stopped. Unless reset, therefore, the inverter cannot restart. Switch power off once, then on again; power off once, then on again; or apply RES signal for more than 0.1 second. Kept on, "Err." appears (flickers) to indicate that the inverter is being reset.

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

3.1.1 Error (alarm) definitions

(1) Major failures

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

Operation Panel Indication	OC1	FR-PU04	OC During Acc
Name	Overcurrent cut-off during acceleration
	When the inverter output current reaches or exceeds
Description	approximately 200% of the	rated inverter current during
	acceleration, the protective circuit is activated to stop the inverter
	output.
Check point	Check for sudden acceleration.
	Check for output short-circuit/ground fault.
Corrective action	Increase the acceleration time.

137