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.
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. Air
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.
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