Nilfisk-Advance CS7000 Service Manual

Engine System - LPG 165Service Manual – CS7000
There are several conditions that will override the user’s engine speed request.
• High pressure wash forces to run speed.
• If the engine is at idle speed, the engine will be forced to the run speed when sweeping only or vacuuming
only. The force idle (neutral timeout) will return the engine to idle speed.
• If the engine is at idle or run speed, the engine will be forced to maximum power speed when scrubbing
only or scrubbing and sweeping. The force idle (neutral timeout) will return the engine to idle speed.
• If the override is run speed, the user can change between maximum power speed and run speed.
• If the override condition goes away (e.g. sweep system turns off) and the user has not changed the engine
mode, the engine is returned to the mode before the forced override.
Normal Engine Shut Off
Step One
When the key switch is shut off, the main machine controller stops sending 12v out the ignition request
circuit. This removes the power source for the fuel lock off solenoid that had been owing through the “closed
at rest” contacts of the high coolant temp shut down relay. No more fuel will ow into the vaporizer/regulator
but the engine continues to run on the fuel that is “trapped” in the regulator.
You may recall that when the key was rst turned on, that the ignition request voltage energized the
ignition request relay and provided power for the ignition system. If this is true, how can the engine stay
running after the ignition request voltage is shut off by the main machine controller? It is able to stay
running because the energized power relay is providing battery power to the ignition request relay keeping it
energized so that the ignition system is still powered up.
2
1
3
5
4
IGN. REQUEST
MAIN
CONTROLLER
FUEL
LOCK-OFF
SOLENOID
OIL SWITCH
(OPEN FOR
PRESSURE)
TEMP. SWITCH
(OPEN FOR
NORMAL TEMP.)
RUN ENABLE SIGNAL
SHU TDOWN Control
CRANK REQUEST
IGNITION REQUEST
ENGINE RUN (12V INPUT)
HIGH COOLANT TEMP Signal
SPEED 2 (12V OUTPUT)
SPEED 3 (12V OUTPUT)
Eng. RPM
Sensor
STARTER
12v BATTERY
ALTERNATOR
IGNITION POWER
FOR IGNITER &
HIGH COOLANT TEMP.
SH UT DOW N RE LAY
1
5
4
3
2
CONTROL
RELAY
1
5
4
3
2
IGNITION
REQUEST RELAY
POWER
RELAY
1
5
4
3
2
LOW OIL PRESS.
SHUTDOWN
RELAY
1
5
4
3
2
CRANK
REQUEST
RELAY
1
2
5
6
7
8
9
10
11
12
WOODWARD
L-SERIES
ACTUATOR
3
4
1 2 3
Main Machine
Controller
Carb.
Fuel
Shut Off
Solenoid
85
86
87
87a
30
12v

Nilfisk-Advance CS7000 Specifications

General

Brand	Nilfisk-Advance
Model	CS7000
Category	Floor Machine
Language	English