Mitsubishi Electric FR-V560 Instruction Manual page 218

Operation Panel
Indication
Name
Overcurrent shut-off during deceleration
• When the inverter output current reaches or exceeds approximately 200% of the rated inverter
Description
• This indication also appears when one of the output cables opens during vector control without
• Check for sudden speed reduction.
• Check for output short circuit.
Check point • Check for too fast operation of the motor's mechanical brake.
• Check for wiring (Check that the motor is running normally.) (under vector control without
• Increase the deceleration time.
Corrective action
• Check the mechanical brake operation.
• Perform correct wiring. (under vector control without encoder.)
Operation Panel
Indication
Name
Regenerative overvoltage shut-off during acceleration (*2)
If regenerative energy causes the inverter's internal main circuit DC voltage to reach or exceed the
Description
specified value, the protective circuit is activated to stop the inverter output. It may also be
activated by a surge voltage generated in the power supply system.
Check point
Check for too slow acceleration.(i.e. during descending acceleration with lifting load)
• Decrease the acceleration time.
Corrective action
• Use the brake unit.
Operation Panel
Indication
Name
Regenerative overvoltage shut-off during constant speed (*2)
If regenerative energy causes the inverter's internal main circuit DC voltage to reach or exceed the
Description specified value, the protective circuit is activated to stop the inverter output. It may also be
activated by a surge voltage generated in the power supply system.
Check point
Check for sudden load change.
• Keep load stable.
Corrective action
• Use the brake unit.
2: E. OV3 appears if the over voltage shutoff occurs during positioning.
*
Operation Panel
Indication
Name Regenerative overvoltage shut-off during deceleration or stop
If regenerative energy causes the inverter's internal main circuit DC voltage to reach or exceed the
Description
specified value, the protective circuit is activated to stop the inverter output. It may also be
activated by a surge voltage generated in the power supply system.
Check point Check for sudden speed reduction.
• Increase the deceleration time.
Corrective action
• Decrease the braking duty.
• Use the brake unit.
Operation Panel
Indication
Name Motor overload shut-off (electronic thermal relay function) (*3)
The electronic thermal relay function built in the inverter detects motor overheat due to overload or
reduced cooling capability during low-speed operation to stop the inverter output. When running a
Description
multi-pole motor or two or more motors during V/F control, provide a thermal relay in the inverter
output side since such motor(s) cannot be protected.
Protection against burnout due to motor temperature rise
Check point
Check the motor for use under overload.
• Reduce the load weight.
Corrective action
• For a constant-torque motor, set the constant-torque motor in Pr. 71 "applied motor".
E.OC3
current during deceleration (other than acceleration or constant speed), the protective circuit is
activated to stop the inverter output.
encoder.
encoder.)
E.OV1
E.OV2
E.OV3
(Set the deceleration time that meets the inertia moment of the load)
E.THM
FR-PU04V OC During Dec
FR-PU04V OV During Acc
FR-PU04V Stedy Spd OV
FR-PU04V OV During Dec
FR-PU04V Motor Overload
209
Errors (Alarms)
5