12.2 Troubleshooting
Symptom
Cause
Inspection
Remedy
Servomotor does not run
Overloaded
Try running with no load
Reduce the load or replace
with a larger capacity Servo-
motor.
:Lose connection Check connector terminals
1ett AP oose parts ...
,xternal connector wiring in-
'01TeCt
Check external connector wiring
Refer to the connection cha-
gram and correct the;wiring*
Unstable Servomotor rotation
::Faulty connection
Cheek the
terminals
09tikNcal
Phase-U, -V and -W lead
as well <as feedback pulse
Reconnect the wiring, ...,
...
- -
.. ..-,..:
.....
Servomotor overheated Ambient temperature too high
Check to see if the ambient tempera-
ture is below 40°C.
Reduce the ambient tempera-
ture to below 40°C.
Servomotor surface dirty Check visually.
Clean dust and oil from the
motor surface.
Overloaded Try operating with no load
Reduce the load or replace
with a larger capacity Servo-
motor.
Abnormal noise Mechanical mounting incor-
rect
• Loose Servomotor mounting
screws?
• Coupling not centered?
• Coupling unbalanced?
• Tighten mounting screws.
• Center or balance the cou-
piing.
Bearing defective
Check for noise and vibration near
the bearing.
Contact your Yaskawa repre-
sentative if defective.
Vibration caused by the equip-
ment
Foreign objects, damage, or de-
formation of sliding parts.
Contact the equipment
manufacturer.
12.2 Troubleshooting
12.2.1 Servomotors
See Ta b le 12.5 for the appropriate action when a problem occurs during operation, and be sure to
turn OFF the servo system power supply before commencing the procedures that are shaded. Con-
tact your Yaskawa representative immediately if the problem cannot be resolved using the de-
scribed procedures.
Table 12.5 Causes, Inspection Areas, and Remedies
Note Be sure to turn OFF the power supply when performing the inspection or remedy in the shaded boxes.
12 -5
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