Mitsubishi Electric MELSERVO-J4 Instruction Manual page 25

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 10 Name: Undervoltage
Alarm content
Detail
Detail name
No.
10.2 Voltage drop in (1) The main circuit power
the main circuit
power
(2) The wiring between P3
(3) For the drive unit, the
(4) For the drive unit, the
(5) The voltage of the main
(6) The alarm has
The voltage of the control circuit power supply has dropped.
The voltage of the main circuit power supply has dropped.
Cause
Check the main circuit
supply wiring was power supply wiring.
disconnected.
Check the main circuit
For the drive unit, the power supply wiring of
main circuit power the converter unit.
supply wiring of the
converter unit was
disconnected.
Check the wiring
and P4 was between P3 and P4.
disconnected.
Check the wiring
For the drive unit, the between P1 and P2 of
wiring between P1 and the converter unit.
P2 of the converter unit
was disconnected.
Check the magnetic
magnetic contactor contactor control
control connector of the connector of the
converter unit was converter unit.
disconnected.
Check the bus bar
bus bar between the between the converter
converter unit and drive unit and drive unit.
unit was disconnected.
Check if the voltage of
circuit power supply is the main circuit power
low. supply is the
prescribed value or
lower.
200 V class: 160 V
AC
400 V class: 280 V
AC
100 V class: 83 V AC
48 V DC setting: 35 V
DC
24 V DC setting: 15 V
DC
Check if the bus
occurred during voltage during
acceleration. acceleration is lower
than the prescribed
value.
200 V class: 200 V
DC
400 V class: 380 V
DC
100 V class: 158 V
DC
48 V DC setting: 35 V
DC
24 V DC setting: 15 V
DC
Check method Check result
It is disconnected.
It is connected.
It is disconnected.
It is connected.
It is disconnected.
It has no failure.
It is disconnected.
It has no failure.
The voltage is the
prescribed value or
lower.
The voltage is
higher than the
prescribed value.
The voltage is lower
than the prescribed
value.
The voltage is equal
to or higher than the
prescribed value.
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Action Target
Connect it correctly. [A]
[B]
[WB]
[RJ010]
Check (2).
[GF]
Connect it correctly.
Check (3).
Connect it correctly.
Check (4).
Connect it correctly.
Check (5).
Increase the voltage
of the main circuit
power supply.
Check (6).
Increase the
acceleration time
constant. Or
increase the power
supply capacity.
Check (7).