Operating Instructions – Explosion-Proof CMP Synchronous Servomotors
39
8
Servomotor malfunctions
Malfunctions
8
Malfunctions
8.1
Servomotor malfunctions
8.2
Malfunctions when operated with a servo inverter
Please have the following information available if you require assistance from the
SEW-EURODRIVE Service:
• Complete nameplate data.
• Type and extent of the problem.
• Time the problem occurred and any accompanying circumstances.
• Assumed cause
Malfunction
Possible cause
Remedy
Servomotor does not start
Supply cable interrupted
Check connections, correct if necessary
Fuse has blown
Replace fuse
Motor protection has triggered
Check motor protection for correct setting, correct fault if
necessary
Servo inverter faulty, overloaded, incor-
rectly wired or incorrectly set
Check servo inverter, check wiring
Incorrect direction of rotation
Servomotor connected incorrectly
Check servo inverter, check setpoints
Servomotor hums and has
high current consumption
Drive is blocked
Check drive
Brake does not release
See section "Brake malfunctions" (
σιεηε
Encoder cable malfunction
Check encoder cable
Servo inverter setting incorrect
Check servo inverter
Servomotor heats up exces-
sively (measure tempera-
ture, significantly higher than
110 °C)
Overload
Measure power, use larger servomotor or reduce load if
necessary, check travel profile
Ambient temperature is too high
Comply with permitted temperature range
Insufficient cooling
Correct cooling air supply or clear cooling air passages
Rated operating mode (S1 to S10,
EN 60034) exceeded, e.g. caused by
excessive torque
Adjust the rated operating mode of the servomotor to the
operating conditions; consult a professional to determine
the correct drive if need be
Servo inverter not optimized
Check servo inverter
Running noise on servomo-
tor
Bearing damage
•
Contact SEW-EURODRIVE customer service
•
Replace the servomotor
Vibration of rotating parts
Rectify cause, possible imbalance
NOTE
The symptoms described in section "Servomotor malfunctions " may also occur when
the motor is operated with a servo inverter. Please refer to the inverter operating in-
structions for the meaning of the problems that occur and to find information about rec-
tifying the problems.
Summary of Contents for CMP40
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