9
Malfunctions
General information
Operating Instructions – CM3C63 – 100
109
9
Malfunctions
9.1
General information
WARNING
Risk of injury if the drive starts up unintentionally.
Severe or fatal injuries.
•
Before you start working on the unit, disconnect the motor and all connected op-
tions from the power supply.
•
Secure the motor against unintended power-up.
CAUTION
Risk of burns due to hot surfaces.
Injury.
•
Let the product cool down before touching it.
NOTICE
Destruction of the motor due to multiple acknowledgments of a motor protection
fault.
Damage to property, damage to the motor.
•
First, determine the cause of the fault before acknowledging a motor protection
fault.
•
Do not acknowledge a motor protection fault more than once.
9.2
Servomotor malfunctions
Fault
Possible cause
Measure
Motor does not start up Supply cable interrupted
Check connections, correct if necessary
Thermal motor protection tripped
Check thermal motor protection for correct
setting, correct fault if necessary
Inverter faulty, overloaded, incor-
rectly 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 consump-
tion
Drive is blocked
Check drive
Brake does not release
See chapter "Brake malfunctions" (→
Encoder cable malfunction
Check encoder cable
Wrong inverter setting
Check the inverter
26870460/EN – 05/2021
