Bosch Ascenta SHE5AM02UC Istruzioni per la riparazione - Pagina 13

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4.5

Drain pump

The BLDC 9-vane drain pump has variable speed and direction.

The power control module controls speed and direction, detects

end of draining and blocked rotor and corrects locked rotor

conditions.

The dishwasher won't run if the drain pump is

disconnected or disabled.

To remove the drain pump, rotate it clockwise and pull it out.

4.5.1

Solving installation issues

Often improper installations, not drain pump issues, cause

dishwashers to not drain properly.

 Must have drain hoses with high loops (min. 20" high)

or drains with air gaps.

 Drain hoses are 6' long and can be up to 10' long.

 Secure drain hoses to rear of dishwashers with non-

metal bands.

 Make sure drain hoses aren't kinked.

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4.5.2

Cavitating

Cavitating may occur in any type of pump when impellers spin

faster (from low inlet or outlet pressure), creating air pockets

around impellers.

Cavitating pumps can be noisy.

gaps/high loops keep water contacting pump outlets, preventing

air pockets from forming.

4.5.3

Siphoning

Siphoning may occur in any type of drain pump when low water

flow allows a siphon (suction) to develop, pulling waste water

back into the pump.

Sump check valves along with air

gaps/high loops prevent siphons from being created.

Air

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