Siemens SIMOTICS A-1FV5 Operating Instructions Manual page 52

Operation
8.4 Faults
No. Cause of fault
L Rotating parts are grinding
Foreign bodies within the motor
Bearing damage
M Rotor not balanced
N Rotor out of true, shaft bent
O Poor alignment
P Coupled machine not balanced
Q Shocks from coupled machine
R Imbalance originating from gearing
S Cooling water pipe / water connection
defective
If the fault still cannot be resolved after applying the measures specified above, please
contact the manufacturer or the Siemens Service Center.
52
Determine cause and adjust parts
Send to manufacturer for repair
Send to manufacturer for repair
Decouple rotor and rebalance
Consult the manufacturer
Align motor unit, check coupling
Re-balance coupled motor
Check coupled motor
Adjust/repair gearing
Locate leaks and seal as necessary, or consult the manufacturer
SIMOTICS A-1FV5/1PV5 synchronous/induction motors
Remedial measures
Operating Instructions, 03/2014, 610.45002.40