Nilfisk-ALTO POSEIDON 4 Series, Service Manual, Page: 13 / 37

D
13 SM_POSEIDON 4_en_Ver.1.0_08.2012
Function
Functional-block diagram
HP-Pump Strainer PV Injektor Spray device Water
Power S1
Motor (M1)
B4
B3
Detergent
Dt.Valve
Fig. D.1: Functional diagram POSEIDON 4 (1~)
Functional-block diagram 1~
Explanation for functional diagram
(Refer to technical data part B and wiring diagrams part H)
Preconditions:
-The high pressure cleaner is connected to adequate water and power supply.
Main switch S1 in ”OFF” position.
-There is main voltage to S1.
-Cleaner is still off.
Main switch S1 in ”ON” position.
-Gun closed : The cleaner starts up (if B4 is closed and B3 is closed) until cut-off pressure is
reached => end switch B4 opens => the cleaner stops.
-NOTE ! Static high pressure water between valve block - hose - gun .
-Gun activated: The pressure drops in pressure valve => the end switch B4 is activated =>
the cleaner starts up and runs at working pressure.
-Gun being closed: Working pressure increases to cut-off pressure => end switch opens =>
the cleaner stops.
-Detergent valve: The cleaner running at working pressure and the detergent valve open,
detergent is added by means of the vacuum in the injector to the high pressure water.