93
34 - Scrub System, Disc
Circuit Overview
The brush motors are powered from the power module The power module controls the K2 relay, which
provides power to the motors The power module then applies PWM control to the negative side of
the motor, including soft-start at startup The power module monitors the health and performance of the
motors and reports this information back to the main controller The optional side sweep motor is controlled
in the same manner
The deck lift actuator is powered from the power module, which needs to reverse the polarity to this motor in
order to raise and lower the deck in very small amounts to maintain pressure The signal from the controller
is reversible Pulse-Width Modulated (PWM)
B-
B+
J3-6
J3-1
E3
POWER MODULE
KSI
J3-2
J3-9
PWM
PWM
PWM
150A Fused Battery
KSI Relay
Battery Negative
TO 2C5
TO 2B2
BLK
ORN/GRA
BLU/GRA
B
LK
R
E
D
BLU/RED
WHT/VIO
ORN/RED
BRN
BLU/GRA
BLK/YEL
RED
B
LU
/R
E
D
BLU/RED
BLU/GRA
BLU/GRA
BLU/GRA
B+
B-
B+
B-
KSI
B-
K2
POWER MODULE
2
1
B-
M
M2
MOTOR, LEFT BRUSH DISK
-
+
M
M1
MOTOR, RIGHT BRUSH DISK
-
+
B+
B-
K2
COIL, POWER MODULE
3
4
B-
M
M7
DECK ACTUATOR
-
+
B-
M
M3
SIDE SWEEP
-
+
B+
B-
RIGHT DECK BRUSH IS
REAR CYINDRICAL BRUSH
LEFT DECK BRUSH IS
FRONT CYLINDRICAL BRUSH