Nilfisk-ALTO Poseidon 5 Series, Service Manual, Page: 36 / 68

36
POSEIDON 5 NEW-NA5_en_Ver.1.0_20/12
Function
D
B3 Motor thermal switch.
B4 Micro switch.
K1 Contactor.
M1 Motor.
S1 Main switch ON/OFF.
Pic. D1: Wiring diagram.
Operation of Poseidon PA 5:
Pre-conditions:
Machine hooked up to adequate water and power supply. Right Spray gun,
hose and lance/nozzle is used.
Main switch in position ”0” (OFF):
-There is main voltage at the contacts of S1 and K1.
- Machine is still off.
Main switch S1 in position ”1” (ON):
- Spray gun is closed; machine builds up pressure, if B4 (cut off pressure not reached)
and B3 (motor winding temp. Below < 160°C or < 320°F; automatic reset of B3) are closed;
if cut off pressure is reached B4 opens and the machine stops.
-If spray gun is activated pressure in unloader drops, B4 closes and starts the motor, water
flows at working pressure.
- Closing spray gun; working pressure increase in unloader till cut off pressure is reached;
B4 opens, machine stops.
Operation electrical system