Ariston Fridge/Freezer Combined Dokumentacja Pobierz pdf (Strona 12)

Merloni Elettrodomestici

FULL NO FROST COMBINED UNIT (2003)

Technical Manual

GB 04-10-28/01 12-43

Language Issue/Edition Page

4 ANALYZING THE LOADS

1. Compressor

The compressor, managed by the electronic board, is normally on when at least one of

the two compartments demands refrigeration, i.e., when the temperatures of the freezer

and/or refrigerator air sensor are such as to activate at least one refrigeration demand.

When both compartments no longer need refrigeration, the refrigeration demands are

deactivated and the compressor is switched off.

There are particular situations when, despite demands for refrigeration by the

appliance's compartments, the compressor remains switched off.

• Compressor protection: in particular the compressor switches on 8 minutes after

it has been switched off. This allows the gas pressures inside the thermodynamic

circuit to equalize without risk of the compressor becoming blocked due to too high

pressures inside the thermodynamic circuit.

• Long periods of activity: if the compressor remains on for more than 4 hours it is

switched off, even if the compartments demand refrigeration.

• Pause after defrost: at the end of every defrost, the compressor observes

10 minutes of protection so that the water formed can completely run off before

the evaporator starts to cool again.

POSSIBLE CAUSE OF MALFUNCTION:

Electronic board management

Compressor control circuit on the board

Connection on the board

Wiring harness

Connection on the compressor

Breakages/anomalies inside the compressor

Temperature sensors open or short-circuited

TESTING:

General on appliance: force the compressor to switch on by activating the

24h SUPER FREEZE function and check that the compressor switches on.

(Remember the 8 minutes of compressor protection).

Wiring: check for continuity and short circuits; check the connections (connectors and

terminals); check whether voltage is available.

Component: check that the component is fed; direct check of the compressor

(powered directly).

Electronic board: carry out a quick visual check of the board (breakages or burnouts,

etc.); check by using a replacement.

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Ariston Fridge/Freezer Combined Dokumentacja Strona 12