Design And Function; Safety System - Bosch WAT28400 Repair Instructions

Design and function

3.1

Safety system

3.1.1 Structure
Fig. 1: Components of the safety system
1 Aquastop
2 electronics module
3 Float
The leakage water hose (6) of the Aquastop feeds into the base support (5). The
safety switch (4) and the float (3) are installed in the base support.
Aquastop (1) and safety switch (4) are electrically connected to the electronics
module (2).
3.1.2 Function
The safety system is active as soon as the appliance is switched on.
2017-05-22 / DIS 113_58300000186503_ara_en_c
4 Safety switch
5 Base support
6 Leakage water hose
Copyright by BSH Hausgeräte GmbH
Water can leak from various points on the appliance:
• Leakage water hose of the Aquastop
• Outer tub
• Seal
The leaking water collects in the base support. The increasing water level in
the base support lifts the float and actuates the safety switch. The electronics
deactivate the Aquastop valve and stop the water supply. If there is water in the
outer tub, the electronics switch the pump on. The pump pumps the water out of
the tub and prevents large volumes of water from overflowing or leaking out. An
error message sounds and is indicated on the display.
As long as the safety switch is actuated, the appliance is not
ready for use.
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