Siemens 1FK7 Series User Manual

Operation
8.2 Faults
Synchronous Motors 1FK7
Operating Instructions, 03/2011, 610.40700.40c
43
Table 8- 2 Key to causes of faults and remedial measures
No. Cause of fault Remedial measures
A Overload Reduce load
B Interruption of a phase in the supply
cable/motor winding
Check the frequency converter and supply cables/measure the winding
resistances and insulation resistances, repair after consultation with
manufacturer
C Interrupted phase in the feeder cable
after switching on
Check the frequency converter and supply cables/check the winding
resistances
D Converter output voltage too high,
frequency too low
Check the settings on the frequency converter, perform automatic motor
identification
F Winding short circuit or phase short circuit
in stator winding
Measure the winding resistances and insulation resistances, repair after
consultation with manufacturer
Cooling water not connected / switched
off
Check cooling water connection/switch on cooling water G
Water connection / pipes defective Locate leaks and seal as necessary, or consult the manufacturer
Cooling water flow rate too low Increase cooling water flow rate H
Inlet temperature too high Set correct inlet temperature
Heat dissipation impeded by deposits Clean the surface of the drives and ensure that the cooling air can flow
in and out unimpeded
Cooling air inlet/outlet is blocked by
foreign bodies
Remove the block and ensure that the cooling air can flow in and out
unimpeded
I
Fan motor does not start Check the fan motor to ensure that it is functioning correctly
J Insufficient shielding for motor and/or
encoder cable
Check the shielding and grounding
K Excessive drive controller gain Adjust the controller
Rotating parts are grinding Determine cause and adjust parts
Foreign bodies inside the motor Send to manufacturer for repair
L
Bearing damage Send to manufacturer for repair
M Rotor not balanced Decouple rotor and rebalance
N Rotor out of true, shaft bent Consult the manufacturer
O Poor alignment Align motor set, check coupling
P Coupled machine not balanced Re-balance coupled machine
Q Shocks from coupled machine Check coupled machine
R Fault originating from the gear unit Adjust/repair gear unit
If the fault still cannot be resolved after applying the measures specified above, please
contact the manufacturer or the Siemens Service Center.
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Siemens 1FK7 Series Specifications

General

Product type	Synchronous motor
Encoder	Incremental encoder, absolute encoder
Cooling method	Natural cooling, forced-air cooling
Degree of protection	IP64, IP65
Speed range	Up to 9000 rpm
Feedback system	Encoder or resolver