Alfa Laval 881176-09-01/1, Instruction Book

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4.2 The separator stops 4 Trouble shooting
26
4.2 The separator stops
4.3 The separator
vibrates
Possible cause Action
The safety yoke has been moved out
of its position. Reposition the yoke. Running position = vertical.
Overload due to incorrect assembly. Check the bowl assembly.
Too high counter pressure. Reduce the counter pressure (100 - 200 kPa is
recommended).
Defective motor or frequency
converter. Replace motor or frequency converter (located in Control
unit).
WARNING
Disintegration hazard
If excessive vibrations occur, stop the separator.
Possible cause Action
Bowl out of balance due to:

Insufficient or incorrect cleaning
(sediment in disc stack). Dismantle and clean the separator bowl. Be sure that the
separator is assembled correctly.

Unevenly spaced sediment cake
(bowl not cleaned prior to start).

Incorrect assembly.
Vibration dampers are worn. Fit three new dampers.
Motor bearings are damaged. Fit new bearings.