Troubleshooting - Mitsubishi Electric MELSERVO-J2-Super Series Supplementary Instructions Manual

3. MR-J2S- B4 SERVO AMPLIFIER

3.8 Troubleshooting

Display Name
10 Undervoltage
30 Regenerative
error
POINT
Alarms different from those occurring to the 200VAC servo amplifiers are
described.
Definition
Power supply 1. Power supply voltage is low.
voltage dropped
2. There was an instantaneous
below 280VAC.
control circuit power failure of
60ms or longer.
3. Shortage of power supply capacity
caused the power supply voltage to
drop at start, etc.
4. Power was restored after the bus
voltage had dropped to 380VDC.
(Main circuit power switched on
within 5s after it had switched off.)
5. Faulty parts in the servo amplifier
Alarm (10) occurs if power is
switched on after CN1A, CN1B
and CN3 connectors are
disconnected.
Permissible 1. Parameter No. 2 setting error
regenerative power
2. Built-in regenerative resistor or
of the built-in
regenerative option is not
regenerative
connected.
resistor or
3. High-duty operation or continuous
regenerative option
regenerative operation caused the
is exceeded.
permissible regenerative power of
the regenerative option to be
exceeded.
Call the status display and check
the regenerative load ratio.
4. Power supply voltage rose above
535VAC.
5. Built-in regenerative resistor or
regenerative option faulty.
Regenerative 6. Regenerative transistor faulty.
transistor fault
1) The regenerative option has
2) The alarm occurs even after
Cause
Checking method
Checking method
Checking method
overheated abnormally.
removal of the built-in
regenerative resistor or
regenerative option.
3 - 33
Action
Check the power supply.
Change the servo amplifier.
Set correctly.
Connect correctly
1. Reduce the frequency of positioning.
2. Use the regenerative option of larger
capacity.
3. Reduce the load.
Check power supply
Change the servo amplifier or regenerative
option.
Change the servo amplifier.