Operation
8.4 Deactivating
Smoke extraction motors
Operating Instructions, 03/2016, 5 610 80000 40 018
67
Table 8- 2
Mechanical effects
Mechanical fault characteristics
↓
Grinding noise
↓
Overheating
↓
Radial vibrations
↓
Axial vibrations
Possible causes of faults
Remedial measures
1)
X
Rotating parts are grinding
Determine cause and adjust parts concerned
X
Reduced air supply, fan possibly rotating in the wrong
direction
Check airways, clean machine
X
Rotor not balanced.
Check feather key declaration (H, F, N)
X
Rotor out of true, shaft bent
Please consult the manufacturer.
X X Poor alignment
Align machine set,
check coupling.
2)
X
Coupled machine not balanced
Re-balance coupled machine
X Surges from coupled machine
Inspect coupled machine
X X Imbalance originating from gearing
Adjust/repair gearing
X X Resonance in the overall system (comprising machine
and foundation)
Reinforce foundation following consultation
X X Changes in foundation
Determine cause of changes; eliminate if neces-
sary; realign machine
1) In addition to the cause of the fault (according to remedial measures), also eliminate the
damage caused to the machine, if necessary.
2) Note any changes that take place while the temperature is rising.
8.4
Deactivating
Commission any devices provided for protection against condensation after switching off the
machine.
