Справочник Пользователя для Mitsubishi Electronics FR-V500

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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 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.

!

When the alarm output signal holding protective function is activated, 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.

!

When the alarm display protective function is activated, the operation panel display section is changed
automatically.

!

When the resetting method protective function is activated, the inverter 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 0.1 seconds.
If the RES signal is kept on, "Err." appears (flickers) to indicate that the inverter is in a reset status.

!

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

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

*

1: E. OC3 appears if the overcurrent shutoff occurs during positioning.

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 output short circuit.
• Check that main circuit power (R, S, T) is supplied.

• Increase the acceleration time.
• Supply main circuit power (R, S, T).

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.

Overcurrent shut-off during deceleration

When the inverter output current reaches or exceeds approximately 200% of the rated inverter 
current during deceleration (other than acceleration or constant speed), the protective circuit is 
activated to stop the inverter output.

• Check for sudden speed reduction.
• Check for output short circuit.
• Check for too fast operation of the motor's mechanical brake.

• Increase the deceleration time.
• Check the mechanical brake operation.