8.2 Switching o and operating phases
During downtimes, deposits must not be produced that can block the cooling system. Check
with the manufacturer of the coolant as to how long it can remain in the cooling system.
8.3 Dealing with faults
If there are deviations from normal operation or if faults occur, initially proceed according to the
following list. In this regard, observe the relevant chapters in the documentation associated with
the components of the complete drive system.
WARNING
Risk to life as a result of non-functioning protective devices
Protective devices that are not functioning can result in death, serious injury or material
damage.
• Do not deactivate protective devices. This also applies to test operation.
• Only work with protective devices that are fully functional.
NOTICE
Damage to the machine caused by faults
• Resolve the cause of the fault as specied in the remedial measures section.
• Repair any damage to the machine.
• Replace damaged motors.
Table 8-1 Possible faults
Fault Cause of the fault (see following table)
Motor does not start A B D
Motor starts up slowly A C D E
Humming noise when starting C D E
Humming noise during operation A C D E
High temperature rise during no-load operation D F G
High temperature rise when under load A C F G
Overheating of individual winding sections E
Uneven running H J
Grinding sound, running noise K
Radial vibrations L
Axial vibrations L M
Water is leaking N
Operation
8.3Dealing with faults
1FW6 built-in torque motors
120 Operating Instructions, 09/2022, A5E52220812B AA
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