1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 56
Alarm No.: 47
Name: Cooling fan error
Alarm content
The speed of the servo amplifier cooling fan decreased.
Or the fan speed decreased to the alarm occurrence level or less.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
47.1 Cooling
fan
stop error
(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 if the cooling
fan is stopping.
It is stopping.
Replace the servo
amplifier.
47.2 Cooling
fan
speed reduction
error
(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.
Nothing has been
caught.
Check (2).
(2) Cooling fan life expired. Check the cooling fan
speed.
The fan speed is
less than the alarm
occurrence level.
Replace the servo
amplifier.
Alarm No.: 50
Name: Overload 1
Alarm content
Load exceeded overload protection characteristic of servo amplifier.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
50.1 Thermal
overload error 1
during operation
(1) The servo motor power
cable was
disconnected.
Check the servo motor
power cable.
It is disconnected.
Repair or replace
the servo motor
power cable.
[A]
[B]
[WB]
[RJ010]
[GF]
It is not
disconnected.
Check (2).
(2) The connection of the
servo motor is incorrect.
Check the wiring of
U/V/W.
It is incorrect.
Connect it correctly.
It is correct.
Check (3).
(3)
The
electromagnetic
brake has not released.
(The electromagnetic
brake has been
activated.)
Check if the
electromagnetic
brake is released
during operation.
It is not released.
Release the
electromagnetic
brake.
It is released.
Check (4).
(4) A current was applied to
the servo amplifier in
excess of its continuous
output current.
Check the effective
load ratio.
The effective load
ratio is high.
Reduce the load. Or
use a larger capacity
motor.
The effective load
ratio is small.
Check (5).
(5)
The
connection
destination of the
encoder cable is
incorrect.
Check the connection
destinations of CN2A,
CN2B, and CN2C.
It is not correct.
Connect it correctly. [WB]
It is correct.
Check (6).
(6) The servo system is
unstable and
resonating.
Check if it is
resonating.
It is resonating.
Adjust gains.
For MR-J4-03A6(-
RJ) and MR-J4W2-
0303B6, check if the
main circuit power
supply voltage is 48
V DC even though
the setting is 24 V
DC.
[A]
[B]
[WB]
[RJ010]
[GF]
It is not resonating.
Check (7).
(7) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
Replace the servo
amplifier.
It is repeatable.
Check (8).
(8) The encoder or linear
encoder is
malfunctioning.
Replace the servo
motor or linear
encoder, and then
check the
repeatability.
It is not repeatable.
Replace the servo
motor or linear
encoder.
Содержание MELSERVO MR-J4-B-RJ Series
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