Detergent Dosing Pump (Dose) - Kärcher B80W Service Manual

Pin 1 Battery voltage 24 Volt (+).
Pin 2 24 Volts if the water pump is ON.
0 Volts if the water pump is OFF.
Pin 3 Ground 0 Volts.
Pin 4 Control voltage for servo motor:
1.7-1.9 volts = dosing valve opened to the max.
3.1-3.3 volts = dosing valve opened at min.
0 volts = dosing valve closed.
1 Water stop valve (Y1)
2 Hose for the water pump (M4)
3 Hose to the brush head
4 Connecting coupling
5 Potentiometer
6 Servo motor
7 Connection plug
16
English 5.906-468.0 Rev. 00 (02/09)

4.14 Detergent dosing pump (DOSE)

The detergent dosing pump is located behind the battery.
Drain the water from the fresh water and wastewater tank.
Open the tank cover screw.
Tilt the tank backwards.