Siemens 1FT7 Series Instructions Manual page 22

7 Instructions in case of faults
In case of deviation from normal operation or faults, proceed first according to the following
list:
In this connection, please also refer to the relevant section of the operating manual for the
components of the entire drive system.
Do not disable the protective devices, even in trial operation.
Consult the manufacturer or the SIEMENS service center when necessary.
For start up, system motor converter:
For motor / motor components:
Fault
Irregular running
Vibrations
Running noises
Motor overheats
(surface temperature
> 140 °C (284 °F))
Temperature monitoring
responds
22
ENGLISH
Cause
Inadequate screening of the
motor or encoder cable.
Amplification of the drive control-
ler too high
Coupling elements or driven
machine are badly balanced
Inadequate alignment of the drive
train
Fixing screws are loose
Foreign bodies inside the motor
Bearing damage
Drive overloaded
Heat dissipation impaired by
deposits
610.40 075.21
A&D Hotline +49 180 50 50 222
Contact in the works +49 174-3110669
Remedy
Check screening and grounding (see
Section 5.1)
Adjust controller (see converter operat-
ing manual)
Rebalance
Realign the machine set
Check and tighten screw connections
Repair by the manufacturer
Repair by the manufacturer
Check load (see type plate)
Clean surface of drives.
Ensure that the cooling air can flow
freely in and out
Siemens AG