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

Page: 114 / 174

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 107
Alarm No.: E7 Name: Controller forced stop warning
Alarm content The forced stop signal of the servo system controller was enabled.
Detail
No.
Detail name Cause Check method Check result Action Target
E7.1 Controller
forced stop
warning
(1) The forced stop signal
of the servo system
controller was inputted.
Check if the servo
system controller is a
forced stop status. It is the forced stop
status. Ensure safety and
cancel the forced
stop signal of the
controller. [B]
[WB]
[RJ010]
(2) The forced stop signal
of the controller was
inputted with Modbus-
RTU communication.
Check if the controller
is in a forced stop
status. It is the forced stop
status. Ensure safety and
cancel the forced
stop signal of the
controller. [A]
Alarm No.: E8 Name: Cooling fan speed reduction warning
Alarm content The cooling fan speed decreased to the warning occurrence level or less.
Detail
No.
Detail name Cause Check method Check result Action Target
E8.1 Decreased
cooling fan
speed warning
(1) Foreign matter was
caught in the cooling
fan.
Check if a foreign
matter is caught in the
cooling fan. Something has been
caught. Remove the foreign
matter. [A]
[B]
[WB]
[RJ010]
[GF]
Nothing has been
caught. Check (2).
(2) Cooling fan life expired. Check the total of
power on time of the
servo amplifier.
It exceed the cooling
fan life. Replace the servo
amplifier.
E8.2 Cooling fan stop Check it with the check method for [AL. E8.1].
Alarm No.: E9 Name: Main circuit off warning
Alarm content
The servo-on command was inputted with main circuit power supply off.
The bus voltage dropped during the servo motor driving under 50 r/min.
Detail
No.
Detail name Cause Check method Check result Action Target
E9.1 Servo-on signal
on during main
circuit off
(1) The main circuit power
supply is off.
For the drive unit, the
power supply of the
converter unit is off.
Check if the main
circuit power supply is
inputted.
Check if the power
supply of the converter
unit is inputted. It is not inputted. Turn on the main
circuit power. [A]
[B]
[WB]
[RJ010]
[GF]
It is inputted. Check (2).
(2) The wiring between P3
and P4 was
disconnected.
For the drive unit, the
wiring between P1 and
P2 of the converter unit
was disconnected.
Check the wiring
between P3 and P4.
Check the wiring
between P1 and P2 of
the converter unit. It is disconnected. Connect it correctly.
It is connected. Check (3).
(3) The main circuit power
supply wiring was
disconnected.
For the drive unit, the
main circuit power
supply wiring of the
converter unit was
disconnected.
Check the main circuit
power supply wiring.
Check the main circuit
power supply wiring of
the converter unit. It is disconnected. Connect it correctly.
It has no failure. Check (4).
(4) For the drive unit, the
magnetic contactor
control connector of the
converter unit was
disconnected.
Check the magnetic
contactor control
connector of the
converter unit. It is disconnected. Connect it correctly.
It has no failure. Check (5).
(5) For the drive unit, the
bus bar between the
converter unit and drive
unit was disconnected.
Check the bus bar
between the converter
unit and drive unit. It is disconnected. Connect it correctly.
It has no failure. Check (6).