Errors (Alarms); Error (Alarm) Definitions - Mitsubishi Electric FR-E520 Instruction Manual

5.1

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 appropriate corrective action, then
reset the inverter, and resume operation.
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 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; or apply RES signal for
more than 0.1s. Kept on, "Err." appears (flickers) to
indicate that the inverter is being reset.
E. OC1
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 that the downward acceleration time is not long in
vertical lift application.
Check for output short-circuit/earth (ground) fault.
Increase the acceleration time. (Shorten the downward
acceleration time in vertical lift application.)
186
PROTECTIVE FUNCTIONS
FR-PU04 OC During Acc