Errors (Alarms); Major Faults - Mitsubishi Electric FR-V560 Instruction Manual

Errors (Alarms)

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 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 operation
Resetting method ............................... When the resetting method protective function is activated, the inverter
When any protective function is activated, take the corresponding corrective action, then reset the inverter, and
resume operation.
5.1.1

Major faults

When the protective function is activated, the inverter output is shut off and an alarm is output.
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation 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.
panel 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.
• This indication also appears when one of the output cables opens during vector control without
encoder.
• 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.
• Check for wiring (Check that the motor is running normally.) (vector control without encoder.)
• Decrease the acceleration time.
• Supply main circuit power (R, S, T).
• Perform correct wiring. (vector control without encoder.)
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.
• This indication also appears when one of the output cables opens during vector control without
encoder.
• Check for sudden load change.
• Check for output short circuit.
• Check for wiring (Check that the motor is running normally.) (under vector control without
encoder.)
• Keep load stable.
• Perform correct wiring. (under vector control without encoder.)
FR-PU04V OC During Acc
FR-PU04V Stedy Spd OV
208