Nilfisk-Advance CS7000 - Circuit Description; The Following Conditions Must be Met for the Scrub System to Operate; Scrub Deck Actuator Motor

Scrub System 303Service Manual – CS7000
Circuit Description
The Following Conditions Must be Met for the Scrub 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 breakers VACC1/CB1 and
VACC2/CB2.
• Circuit breaker VACC1/CB1 must be closed to provide positive voltage to Solution Valve L1.
• Circuit breaker VACC2/CB2 must closed to provide positive voltage to the Left Brush Motor Contactor K1, the
Center Brush Motor Contactor K2 and the Right Brush Motor Contactor K3.
• The J2-25, J2-26 and J2-27 Outputs on the A1 Main Machine Controller must provide ground to the Left Brush
Motor Contactor K1
coil, the Center Brush Motor Contactor K2 coil and the Right Brush Motor Contactor K3 coil
respectively. The J2-25, J2-26 and J2-27 Outputs provide a ground 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 scrub 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
Contactors K1, K2 and K3.
• The Brush Motors M2, M3 and M4 must have connections to battery ground B-.
Scrub Deck Actuator Motor
• The J2-10 and J2-11 PWM Outputs from the A1 Main Machine Controller provide voltage to the Scrub Deck
Actuator Motor M11
. The output polarity determines whether the Scrub Deck Actuator Motor lowers or raises
the scrub deck.
• When the Retract Limit Switch S1 closes, it connects the J7-21 Input to ground which signals the A1 Main
Machine Controller
that the scrub deck has reached its upper limit. The A1 Main Machine Controller will
switch off the J2-10 and J2-11 PWM Outputs to stop the upward scrub deck travel.