Drain Pump - Jenn-Air JDB9600AW Technical Education

3.18

Drain pump

1 Catch mechanism
2 Seal
The water is drawn in via the water outlet opening of the pump sump.
The impeller wheel pumps the water through the non-return valve into
the drainage hose.
While water is being pumped out, the BLDC motor (Brushless DC
Motor) signals different states to the power electronics via the current
consumption of the individual windings:
►
No water, (idling)
►
No pressure build-up (missing service flap)
►
Pump blockage
►
Blocked or kinked drainage
3 Impeller wheel
4 Cable holder
If there is too little water in the pump area, pumping is stopped.
If there is no cap in the pump sump, water pressure cannot build up.
An error code is saved in the electronics.
If the pump is blocked, this is detected by the electronics. By brief
intermittent pumping, the pump attempts to loosen the blockage.
If drainage is disrupted by a blockage or a kink in the drainage hose,
pumping is stopped. An error code is saved in the electronics.
Detection occurs via the current input of the pump during idling and
the different load states.