Errors (Alarms); Error (Alarm) Definitions - Mitsubishi FR - S500 Instruction Manual

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
Alarm indication...............................When the protective function is activated, the
Resetting method ............................When the protective function is activated, the
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
Name
Description
Check point
Corrective action
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.
operation panel display automatically switches
to the above indication.
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.
OC1
Overcurrent cut-off during acceleration
When the inverter
approximately 200% of the rated inverter 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.
137
FR-PU04
output current reaches
OC During Acc
or exceeds