Siemens 1PH728, Operating Instructions Manual

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A5E00177602A AD
Siemens AG Operating Instructions 2.02 1PH728
47
Faults
6
6.1 Fault diagnosis table
Diagnosis table for mechanical and electrical faults
The tables below list general faults caused by mechanical and electrical influences.
Table 6-1 Diagnosis table for mechanical faults
Overview of mechanical faults
Mechanical fault characteristics
- rubbing/grinding noise
- significant temperature rise
- radial vibration
- axial vibration
Possible causes of faults
Remedial measures
1)
↴
↴
↴
↴
- Rotating parts rubbing/grinding Determine cause and adjust parts x
- Air supply restricted,
filter dirty,
possibly wrong direction of rotation of fan
Check air passages,
clean filter, replace fan if necessary
x
- Rotor not balanced Decouple rotor and rebalance x
- Rotor out of true, shaft bent Consult the manufacturer x
- Poor alignment Align motor unit,
check coupling
2)
x x
- Coupled motor not balanced Rebalance coupled motor x
- Shocks from coupled motor Check coupled motor x
- Imbalance originating from gearing Adjust/repair gearing x x
- Resonance with the foundation After consultation, reinforce foundations x x
- Changes in foundation Determine cause of changes,
eliminate if necessary; realign motor
x x
1)
As well as eliminating the cause of the fault (as described under "Remedial measures"), you must also rectify any
damage the motor may have suffered.
2)
Take into account possible changes due to a rise in temperature.
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