Errors And Protective Functions; Errors (Alarms) - Mitsubishi Electric FR-V500 Series Instruction Manual

Errors (Alarms)

6 ERRORS AND PROTECTIVE FUNCTIONS

6.1 Errors (Alarms)
When an alarm occurs in the inverter, the protective function is activated bringing the inverter to an alarm stop and
the PU display automatically changes to any of the following error (alarm) indications.
If the fault does not correspond to any of the following errors or if you have any other problem, please contact your
sales representative or distributor.
Retenation of alarm output signal....... When the alarm output signal holding protective function is activated,
Alarm indication.................................. When the alarm display protective function is activated, the control panel
Resetting method ............................... When the resetting method protective function is activated, the inverter
When any protective function is activated, take the appropriate corrective action, then reset the inverter, and
resume operation.
6.1.1 Major faults
When the protective function is activated, the inverter output is shut off and an alarm is output.
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Name
Description
Check point
Corrective action
1: E. OC3 appears if the overcurrent shutoff occurs during positioning.
*
opening the magnetic contactor (MC) provided on the inverter's power
supply side will cause the control power of the inverter to be lost and the
alarm output not to be held.
display section is changed automatically.
output stop status is held, and the inverter cannot restart unless it is reset.
To reset, switch power off once, then on again, or turn on the RES signal
for more than 0.1s.
If the RES signal is kept on, "Err." appears (flickers) to indicate that the
inverter is in a reset status.
E.OC1
Overcurrent shut-off during acceleration (*1)
• When the inverter output current reaches or exceeds approximately 200% of the rated inverter
current during acceleration, the protective circuit is activated to stop the inverter output.
• Power is supplied to only the R1 and S1 terminals. This indication also appears when the start
signal is entered.
• Check for sudden acceleration.
• Check for long descending acceleration time of lift applications
• Check for output short circuit.
• Check that main circuit power (R, S, T) is supplied.
• Decrease the acceleration time.
• Supply main circuit power (R, S, T).
E.OC2
Overcurrent shut-off during constant speed (*1)
When the inverter output current reaches or exceeds approximately 200% of the rated inverter
current during constant speed operation, the protective circuit is activated to stop the inverter
output.
• Check for sudden load change.
• Check for output short circuit.
Keep load stable.
FR-PU04V OC During Acc
FR-PU04V Stedy Spd OV
74