30
Details of trouble
Abnormal sound
Excessively high vibration
Abnormal sound from motor
Shut-off due to overcurrent
Grounding overcurrent
DC overcurrent
Shut-off due to regenerative
overvoltage
Thermal relay operation
Cause
Damaged gears, shafts, or bearings
Deformation of the housing due to uneven
installation surface
Resonance due to insufficient rigidity of
installation base
Incorrect alignment with the mating machine
Transmission of the mating machine's
vibration to the reducer
Entry of foreign matter
Damaged bearings
Sudden acceleration / deceleration
Sudden change in load
Grounding on the output side
Short-circuiting on the output side
Sudden deceleration
Overloading
Correction
Confer with authorized service station.
Flatten the installation surface or use liners
for adjustment.
Reinforce the installation base to improve
the rigidity.
Align the shaft center.
Independently operate the reducer to
check the source of abnormal sound.
Confer with authorized service station.
Confer with authorized service station.
Increase the acceleration/deceleration
time.
Decrease the load change.
Make correction to eliminate grounding.
Make correction to eliminate short-circuiting.
Check cables.
Increase the deceleration time.
Reduce the braking frequency.
Decrease the load to the specified value.
Inverter
tripping
Table 29 Troubleshooting
COMMON
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