150
Operating Instructions – Synchronous Compact Servomotors CMDV55 – CMDV162
10
Servomotor malfunctions
Malfunctions
10.2
Servomotor malfunctions
10.3
Malfunctions of the servo inverter
Malfunction
Possible cause
Remedy
Motor does not start up
Supply cable interrupted
Check connections, correct if necessary
Fuse blown
Replace fuse
Motor protection tripped
Check motor protection for correct setting, correct fault if
necessary
Inverter faulty, overloaded, incorrectly
wired or incorrectly set
Check inverter, check wiring
Incorrect direction of rotation
Incorrect setpoint polarity
Check inverter, check setpoints
Motor hums and has high
current consumption
Drive is blocked
Check drive
Brake does not release
See section "Brake malfunctions" (page 151)
Encoder cable malfunction
Check encoder cable
Wrong inverter setting
Check the inverter
Motor heats up excessively
(measure temperature, sig-
nificantly higher than 100 °C)
Overload
Measure power, use larger motor or reduce load if
necessary, check travel profile
Ambient temperature too high
Observe permitted temperature range
Insufficient cooling
Correct cooling air supply or clear cooling air passages,
retrofit forced cooling fan if necessary
Nominal duty cycle (S1 to S10, EN 60034)
exceeded, e.g. caused by excessive effec-
tive torque
Adjust the rated operating mode of the motor to the
required operating conditions; consult a professional to
determine the correct drive if necessary
Inverter not optimized
Check the inverter
Running noise on motor
Bearing damage
•
Contact SEW-EURODRIVE customer service
•
Replace the motor
Vibration of rotating parts
Rectify cause, possible imbalance
INFORMATION
The malfunctions described in chapters "Malfunctions of the servomotor" and
"Malfunctions of the brake" may also occur when the servomotor is operated with a
servo inverter. For the meaning of the individual inverter issues and troubleshooting
information, refer to the operating instructions of the servo inverter.
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