User Manual Troubleshooting
EM1 Series AC Servo Motors EM1-01-0-EN-2110-MA Page 59 of 72
11 Troubleshooting
Fault
Possible cause or procedure for
detecting the fault
Solution
Motor cannot be rotated manually
without connecting the controller.
Mechanical interference Remove interference.
Motor three-phase short circuit Fix three-phase short circuit.
Motor can’t rotate at all. Wrong cable wiring
Check the cable connected to the
controller.
Current overload
Check whether there are
interfering objects and remove
them. Fix the brake clamping
failure.
Over temperature protection
Check the over temperature
setting of controller.
Abnormal insulation resistance Measure insulation resistance
after cooling. Measurement of
stator three-phase to ground
(U/V/W to PE):
500 VDC 1 sec >10 M Ω @°C.
If it does not reach 10 M Ω,
please contact HIWIN.
Wrong rotating direction. Wrong controller setting Check controller setting.
Wrong motor power cable wiring Interchange the two-phase power
cable connected to the controller.
Smell of burning. Wrong controller setting Check controller setting.
Wrong motor parameters setting Check motor parameters setting.
Abnormal temperature of motor
outer casing.
Wrong controller setting Check controller setting.
Wrong motor parameters setting Check motor parameters setting.
Abnormal operation of bearing Check installation.
Unstable rotation (vibration). Insulation failure
Check the resistance value of
phase/earth is larger than 10 M
Ω.
Wrong encoder installation
Check installation stiffness of
encoder.
Wrong encoder signal Check encoder connection.
Wrong controller setting Check controller setting.
Wrong motor parameters setting Check motor parameters setting.
Abnormal friction noise. Motor brake doesn’t work Check brake.
Unbalanced system Check the dynamic balance.
Loose system Fix it tight again.
For ED1 drive troubleshooting, please refer to ‘ED1 Series Servo Drive User Manual’.
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