Technical Information
79
G 1xxx/G 2xxx
2.2 WaterProof System (WPS)
The WaterProof System (WPS) consists of a number of interdependent
safety features to provide protection against water leakage.
1. Protection against solenoid valve leakage:
Each water intake is controlled by an inlet valve. If this valve cannot close
properly due to some defect or blockage by a foreign object, a second
inlet valve ensures that the water supply is shut off.
2. Protection against water intake hose leakage:
If a leakage occurs, water flows along an outer hose sleeve surrounding
the intake hose to the drip pan. Here a float switch then acts to switch off
a microswitch which closes the inlet valves to cut off the water supply.
3. Protection against dishwasher overflow:
If some defect has caused the water level in the appliance to rise so that
it overflows into the drip pan, and the water quantity sensor has also
failed, the float switch is activated. This switches off a microswitch which
closes the inlet valves to cut off the water supply. At the same time the
drain pump is activated.
4. Protection against drain pump failure or blocked drain path:
In this case the water level in the appliance rises until it overflows into the
drip pan where the float switch is activated. This switches off a
microswitch which closes the inlet valves to cut off the water supply.
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