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5.1 Errors (Alarms)
5 PROTECTIVE FUNCTIONS
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 optional control panel or the panel
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
• Alarm indication .................................. When the protective function is activated, the
• Resetting method ............................... When the protective function is activated, the inverter
• When the protective function is activated, take the corresponding 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 E. OC1
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
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.
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 0.1 seconds.
Kept on, "Err." appears (flickers) to indicate that the
inverter is being reset.
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 for output short-circuit/ground fault.
Increase the acceleration time.
E. OC2
Overcurrent shut-off during constant speed
When the inverter output current reaches or exceeds
approximately 200% of the rated current during constant
speed, the protective circuit is activated to stop the inverter
output.
Check for sudden load change.
Check for output short-circuit/ground fault.
Keep load stable.
166
PROTECTIVE FUNCTIONS
FR-PU04
OC During Acc
FR-PU04
Stedy Spd OC
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