For Internal Office Use Only
8.1 WATER PUMP STAND STILL
RECOGNITION
If the pump does not deliver water to the brushes
due to clogging of the hoses the so-called standstill recognition is activated.
Automatic standstill recognition for water pump:
The electronic module allows protection of the water pump if the pump does not
deliver correctly. This means if the pump takes in water from the tank and cannot
deliver it to the brushes, a pressure builds at the pump. Without being protected by
the electronic module the pump would deliver against this pressure and could be
damaged.
The electronic module detects the blocked delivery and automatically switches the
pump off for 2 seconds. After this delay, the pump is briefly switched on again and it
is simultaneously measured whether delivery of water to the brushes is free or
blocked.
If delivery is as required, the pump remains ON in the selected stage. If the pressure
still exists, the pump is switched off again for 2 seconds. This procedure is repeated
until the error is remedied.
