Nilfisk-Advance 7765 Service Manual page 44

Service Manual – Advance 7765 / Nilfisk CR1500
Recovery System Wiring Diagram – Standard Recovery System
St.
Ign.
Ignition
Bat.
Switch
Acc.
7
CB8
7 1 2
15 A
7
7
Electrical Circuit Description – Standard Recovery System
The
Squeegee Fan Motor Solenoid (12)
• When the
Squeegee Blade Switch
position
Blade Switch
hydraulic oil to the squeegee vacuum fan motor to run the motor.
• When the
Squeegee Blade Switch
position
Blade Switch
to flow through the
Squeegee Fan Motor Solenoid (12)
• When the
Reverse Relay
energizing the
Squeegee Fan Motor Solenoid (12)
the machine is in reverse. (Not shown is that power from
machine is in reverse.)
The
Recovery High Switch
when the recovery tank is full.
Also refer to the
Solution System
subsection.
Battery 12 VDC
Squeegee
Blade Switch
2
19 1
3
R3
87a
19 30 87
Reverse Relay
44 1 2
Recovery High Switch
controls the hydraulic oil flow to the squeegee vacuum fan motor.
on the instrument panel is set to the squeegee-lower position (
), the
2 Squeegee Fan Motor Solenoid (12)
on the instrument panel is set to the squeegee-raise position (
), the
3 Squeegee Fan Motor Solenoid (12)
switches to position
87
(float switch) will switch on the
section and the
-
+
30
D2
48
Red
41 1 2
High Recovery
Warning Light
is de-energized (blocked) to direct the
is energized (open) to allow the hydraulic oil
and bypass squeegee vacuum fan motor.
, diode prevents voltage from the
D2
. This allows the squeegee vacuum fan motor to run when
is used to raise the squeegee when the
87
High Recovery Warning Light
Recovery System Hydraulic Diagrams
Recovery System
Squeegee Fan
Motor Solenoid (12)
Reverse Relay
High Recovery
Warning Light
149
B-
Squeegee
Squeegee
from