Functional Description Of Pressure Switch; Appliance Is Switched Off - Kärcher HDS 7/12 M Service Manual

6.32 Functional description of pressure switch

6.32.1 Appliance is switched off

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11
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1 High pressure outlet (without pressure)
2 Manometer (without pressure)
3 Pressure retaining valve (closed)
4 Pump stands still
5 Rotary knob
6 Overflow valve (closed)
7 Reduction bore
8 Pressure switch "OFF" (closed)
9 Water inlet
10 Motor contactors (K1) (open)
11 Pressure switch "ON" (closed)
Note
The shown functions of the preessure switches and motor
contactor are for understanding purposes only.
In reality, the information from the two pressure switches is
transferred directly to the control electronics, which in turn
controls the motor contactor.
2 3
0 Volt
4
When the appliance is switched off and the gun is open,
the pressure is taken from the system and it is without volt-
age.
Both pressure switches as well as the overflow valve and
the pressure retaining valve closed.
The motor contactors are open.
English 5.906-432.0 Rev. 00 (06/15)
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