Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 144

8. TROUBLESHOOTING
Alarm No.10
Alarm description
Display Name
10.1 Voltage drop in
the control circuit
power
10.2 Voltage drop in
the main circuit
power
Name: Undervoltage
Voltage of the control circuit power has dropped.
Voltage of the main circuit power has dropped.
Cause
(1) Connector for the control
circuit power is
disconnected or poorly
connected.
(2) Voltage of control circuit
power is low.
(3) Instantaneous control
circuit power failure of
60ms or longer.
(1) Connector for the main
circuit power is
disconnected.
(2) Voltage of main circuit
power is low.
(3) Voltage drops during
acceleration.
(4) Servo amplifier is faulty.
Stop method: All axes stop
Checkpoint
Check the connector of Disconnected or
the control circuit power. poorly connected.
No problem found.
Check if the control circuit 160VAC or less.
power voltage is 160VAC
or less.
Over 160VAC.
Check the power supply Problem found.
for a problem.
Check the connector of Disconnected.
the main circuit power.
No problem found.
Check if the main circuit 160VAC or less.
power voltage is 160VAC
or less.
Over 160VAC.
Check if the bus voltage Below 200VDC.
is 200VDC or more
during acceleration.
Check the bus voltage The main circuit power
using MR Configurator. supply voltage is
160VAC, but the bus
voltage measured
using MR Configurator
is less than 200VDC.
8 - 5
Finding Action
Connect properly.
Check (2).
Increase the voltage in
the control circuit
power.
Check (3).
Check the power
supply.
Connect properly.
Check (2).
Increase the voltage in
the main circuit power.
Check (3) and (4).
Set acceleration time
longer or increase the
power supply
capacity.
Replace the servo
amplifier.