Electrolux SM 554 Manual de servicio descargar pdf (Pagina 53)

Service

Manual

9406

Repair instructions

The contactor fails to make or break

• Check that the operating coil is energised. If this is

the case, take measurements at the coil to check

for a break. If a break has occurred, replace the

coil as follows.

• Undo the contactor and lift it out.

NOTE! The connection cables to the contacts do

not need to be removed.

• Price apart the spring brackets and carefully take

the contactor halves apart; be carefully so that the

movable contacts do not jump out.

• Loosen the connections to the coil.

• Replace the coil.

• Prior to reassembly, check that the contact

surfaces to the magnet core are clean and

undamaged.

• Reassamble and replace the contactor.

The contactor hums considerably

• Loosen and take the contactor apart as described

above.

• Check whether or not the screen windings are

intact. A damaged screen winding causes a loud

hum. If this is the case, replace the contactor.

• Check for foreign particles on the contact surfaces

of the magnet core. Clean carefully with a fine

emery cloth if necessary.

The contactor sticks

• Undo and take the contactor apart as described

above.

• Check that there are no burrs on the coil bobbin

which brake the motion of the movable contactor

halt. Where necessary, deburr.

• Check that the movable contact bridge can move

freely in the contactor housing and that the

movable contacts are correctly seated in their

holders.

Other contactor faults

• Replace the contactor.

25. Contactor

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Electrolux SM 554 Manual de servicio Pagina 53

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