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Faults
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
- Rotating parts rubbing/grinding
- Air supply restricted,
possibly wrong direction of rotation of fan
- Rotor not balanced
- Rotor out of true, shaft bent
- Poor alignment
- Coupled motor not balanced
- Shocks from coupled motor
- Imbalance originating from gearing
- Resonance with the foundation
- Changes in foundation
As well as eliminating the cause of the fault (as described under "Remedial measures"), you must also rectify any
1)
damage the motor may have suffered.
Take into account possible changes due to a rise in temperature.
2)
A5E00264365A
Siemens AG Operating Instructions 2.02 1PL622
Remedial measures
1)
Determine cause and adjust parts
Check air passages,
clean filter, replace fan if necessary
Rebalance rotor
Consult the manufacturer
Align motor unit,
check coupling
2)
Rebalance coupled motor
Check coupled motor
Adjust/repair gearing
After consultation, reinforce foundations
Determine cause of changes,
eliminate if necessary; realign motor
6
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x
x
x
x
x
x
x
x
x
x
x
x
x
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