Mitsubishi Electric MELSERVO-J4 Instruction Manual page 150

3. TROUBLESHOOTING FOR MR-CR55K(4) RESISTANCE REGENERATION CONVERTER UNIT
No. Name/Description
30 Regenerative error
Permissible
regenerative
power of the
regenerative
resistor
(regenerative
option) is
exceeded.
The regenerative
resistor is
malfunctioning.
A regenerative
transistor in the
resistance
regeneration
converter unit is
malfunctioning.
33 Overvoltage
The value of the
bus voltage
exceeded the
prescribed value.
200 V class: 400 V
DC or more 400 V
class: 800 V DC or
more
Cause
(8) A regenerative
transistor in the
resistance regeneration
converter unit is
malfunctioning.
(9) Something near the
device caused it.
(1) The regenerative
resistor (regenerative
option) is not used.
(2) The setting of the
regenerative resistor
(regenerative option) is
incorrect.
(3) The regenerative
resistor (regenerative
option) is not
connected.
(4) Wire breakage of the
regenerative resistor
(regenerative option).
(5) The regeneration
capacity is insufficient.
(6) Power supply voltage
high.
(7) A ground fault or short
occurred at the servo
motor power cable.
(8) Something near the
device caused it.
(9) Impedance at wirings
of L1/L2/L3 is high, and
leak current from servo
motor power cable is
large.
3 - 5
Check method Check result
Remove the The alarm occurs.
regenerative resistor
(regenerative option)
and then check if the
alarm occurs at power
The alarm does not
on.
occur.
Check the noise, It has a failure.
ground fault, ambient
temperature, etc.
Check if the It is not used.
regenerative resistor
(regenerative option)
is used.
It is used.
Check the The setting value is
regenerative resistor incorrect.
(regenerative option)
It is set correctly.
and [Pr. PA01] setting
value.
Check if the It is not connected
regenerative resistor correctly.
(regenerative option)
It is connected
is connected
correctly.
correctly.
Measure the The resistance is
resistance of the abnormal.
regenerative resistor
(regenerative option).
The resistance is
normal.
Set a longer It is not repeatable.
deceleration time
constant, and then
check the
repeatability.
It is repeatable.
Check if the voltage It is higher than the
of the input power prescribed value.
supply is over the
prescribed value.
It is at the
200 V class: 264 V AC
prescribed value or
400 V class: 528 V AC lower.
Check if only the It is shorted.
servo motor power
cable is shorted.
It is not shorted.
Check the noise, It has a failure.
ambient temperature,
etc.
Check the impedance Impedance at wirings
at wirings of L1/L2/L3 of L1/L2/L3 is high,
and leak current from and leak current from
servo motor power servo motor power
cable. cable is large.
Action
Replace the
resistance
regeneration
converter unit.
Check (9).
Take
countermeasures
against its cause.
Use the regenerative
resistor
(regenerative
option).
Check (2).
Set it correctly.
Check (3).
Connect it correctly.
Check (4).
Replace the
regenerative resistor
(regenerative
option).
Check (5).
Use the regenerative
resistor
(regenerative option)
with larger capacity.
Check (6).
Reduce the power
supply voltage.
Check (7).
Replace the servo
motor power cable.
Check (8).
Take
countermeasures
against its cause.
Use the regenerative
resistor
(regenerative
option).