Mitsubishi Electric MELSERVO-JE Instruction Manual page 17

1. SERVO AMPLIFIER TROUBLESHOOTING
Alarm No.: 10 Name: Undervoltage
Alarm content
Detail
Detail name
No.
10.1 Voltage drop in (1) The connection of the
the power
(2) The power supply
(3) An instantaneous power
(4) For the 1-phase power
10.2 Bus voltage (1) The connection of the
drop
(2) The power supply
(3) The alarm has occurred
(4) The servo amplifier is
The power supply voltage dropped.
The bus voltage dropped.
The power supply wiring is incorrect.
Cause
Check the power
power connector has a connector.
failure.
Check if the power
voltage is low. supply voltage is 160
V AC or less.
Check if the power
failure has occurred for supply has a problem.
longer time than the
specified time. The time
is 60 ms when [Pr.
PA20] is "_ 0 _ _". The
time is the value set in
[Pr. PF25] when [Pr.
PA20] is "_ 1 _ _".
Check the power
supply, the power supply wiring.
supply wiring is
MR-JE-100_ or less:
incorrect.
L1 and L3
MR-JE-200_:
L1 and L2
Check the power
power connector has a connector.
failure.
Check if the power
voltage is low. supply voltage is 160
V AC or less.
Check that the bus
during acceleration. voltage during
acceleration is 200 V
DC or more.
Check the bus voltage
malfunctioning. value.
Check method Check result
It has a failure.
It has no failure.
The voltage is 160 V
AC or less.
The voltage is
higher than 160 V
AC.
It has a problem.
It has no problem.
The power supply
wiring is incorrect.
It has a failure.
It has no failure.
The voltage is 160 V
AC or less.
The voltage is
higher than 160 V
AC.
The voltage is less
than 200 V DC.
The voltage is 200 V
DC or more.
The power supply
voltage is 160 V AC
or more, but the bus
voltage is less than
200 V DC.
1 - 10
Action Target
Connect it correctly. [A]
[B]
Check (2).
[C]
Review the power
supply voltage.
Check (3).
Review the power
supply.
Check (4).
Connect it correctly.
Connect it correctly.
Check (2).
Increase the power
supply voltage.
Check (3).
Increase the
acceleration time
constant. Or
increase the power
supply capacity.
Check (4).
Replace the servo
amplifier.