Mitsubishi Electric MELSERVO MR-J4-B-RJ Series, Instruction Manual

Page: 26 / 174

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 19
Alarm No.: 10 Name: Undervoltage
Alarm content
The voltage of the control circuit power supply has dropped.
The voltage of the main circuit power supply has dropped.
Detail
No.
Detail name Cause Check method Check result Action Target
10.2 Voltage drop in
the main circuit
power
(7) The servo amplifier is
malfunctioning.
Check the bus
voltage value. The bus voltage is
less than the
prescribed value
although the voltage
of the main circuit
power supply is
within specifications.
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
Replace the servo
amplifier. [A]
[B]
[WB]
[RJ010]
(8) For the drive unit, the
converter unit is
malfunctioning.
Replace the converter
unit, and then check
the repeatability. It is not repeatable. Replace the
converter unit.