Mitsubishi FR-E520-0.1KN Instruction Manual page 158

FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
FR-PU04 Indication
Name
Description
Check point
Corrective action
Ov During Acc
Regenerative overvoltage shut-off during acceleration
If regenerative energy causes the inverter's internal main
circuit DC voltage to reach or exceed the 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 for too slow acceleration.
Decrease the acceleration time.
Stedy Spd Ov
Regenerative overvoltage shut-off during constant speed
If regenerative energy causes the inverter's internal main
circuit DC voltage to reach or exceed the 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 for sudden load change.
•
Keep load stable.
• Use the brake unit or high power factor converter (FR-HC)
as required.
Ov During Dec
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 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 for sudden speed reduction.
• Increase the deceleration time. (Set the deceleration time
which meets load GD
• Decrease the braking duty.
• Use the brake unit or high power factor converter (FR-HC)
as required.
Motor Overload
Motor overload shut-off (electronic overcurrent protection)
(Note 1)
The electronic overcurrent protection in the inverter detects
motor overheat due to overload or reduced cooling capability
during constant-speed operation to stop the inverter output.
When a multi-pole motor or two or more motors are run,
provide a thermal relay in the output side of the inverter.
Check the motor for use under overload.
• Reduce the load weight.
• For the constant-torque motor, change the Pr. 71 setting to
the constant-torque motor setting.
142
PROTECTIVE FUNCTIONS
2
)