Sweep System, Main 380Service Manual – CS7000
Circuit Description
The Following Conditions Must be Met for the Main Sweep System To Operate
• The Hopper Interlock Switch S3 must be closed.
• There must be positive voltage to the J7-1 Interlock Input. For this to happen:
– The Seat Switch S9 must be closed.
– The Safety Relay K14 on the Steer By Wire Controller A5 must energize the coil to close the Safety Relay
K14
contactor.
– The Emergency Stop Switch S15 must be closed.
– The Battery Interlock S13 must be closed.
• The 400-amp Fuse F1 must be closed to provide positive voltage from the Battery to the load side of Auxiliary
Contactor K9
.
• The Ignition Switch S14 must be closed to provide positive voltage to the Auxiliary Contactor K9 coil. The
J2-14 Output on the A1 Main Machine Controller provides ground to the Auxiliary Contactor K9 coil when the
Ignition Switch S14 provides an input to the Key Switch Input J7-13.
• The Auxiliary Contactor K9 must be closed to provide positive voltage to circuit breaker VACC1/CB1.
• Circuit breaker VACC1/CB1 must be closed to provide positive voltage to the Broom Motor Contactor K4.
• The J2-16 Output on the A1 Main Machine Controller must provide a ground to the Broom Motor Contactor K4
coil. J2-16 provides ground to K4 under the following conditions:
– The A1 Main Machine Controller must receive a signal from the A3 Control Panel via the CAN BUS that the
operator has pressed the sweep switch.
– The A1 Main Machine Controller must receive a signal from the A2 Drive Controller via the CAN BUS that
the machine is moving forward or reverse.
• The 150-amp Fuse F2 must be closed to provide positive voltage from the Battery to the load side of the
Broom Motor Contactor K4,
• The Broom Motor M1 must have connections to battery ground B-.
Main Broom Actuator Motor
The J3-3 and J2-4 PWM Outputs from the A1 Main Machine Controller provide voltage to the Main Broom
Actuator Motor M21
. The output polarity determines whether the Main Broom Actuator Motor lowers or raises
the scrub deck.
The resistance through the main broom actuator potentiometer R4 varies with the broom height. The J7-33
POT HIGH
pin sends a xed positive voltage to R4 with J7-35 POT LOW as a ground. The A1 Main Machine
Controller reads the voltage through R4 from J7-34 WIPER to determine the broom height.
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