Solution System 142Service Manual – SC6500
™
The Solution Control Pump M12 and solution Solenoid Valve L1 are connected to battery ground through the A2
Control Board Assembly
. The A2 Control Board Assembly connects the Solution Control Pump M12 and solution
Solenoid Valve L1 to ground to run the Solution Control Pump M12 and switch on the Solenoid Valve L1 when:
• The A3 Switch/Display Panel Assembly sends the A2 Control Board Assembly a signal via the CAN BUS that
the solution system has been enabled, and,
• The A1 Speed Controller sends the A2 Control Board Assembly a signal that the wheel drive is switched on.
Note that you can select whether the solution system will switch on when the machine is moving in both
forward and reverse, or when moving forward only. This option is described in the Control System/Main
Control Programming Options section.
Note that the ground voltage from the A2 Control Board Assembly to the Solution Control Pump M12 is pulse-
width-modulated (PWM) voltage that varies in frequency to control the solution ow from the Solution
Control Pump M12
. The ground voltage from the A2 Control Board Assembly to the Solenoid Valve L1 is also
PWM voltage, but is always at full voltage when the Solution Control Pump M12 is on.
Detergent System
The Detergent Metering Pumps M13 and M16 are powered directly by the A2 Control Board Assembly. The A2
Control Board Assembly
sends the Detergent Metering Pumps voltage to run the Detergent Metering Pumps when:
• The A3 Switch/Display Panel Assembly sends the A2 Control Board Assembly a signal via the CAN BUS that
the detergent system has been enabled, and,
• The solution system is switched on.
Note that the voltage from the A2 Control Board Assembly to the Detergent Metering Pumps is PWM voltage
that varies in frequency to control the detergent ow from the Detergent Metering Pumps into the solution
system.
Accessory Pump
The Accessory Pump M15 gets positive voltage from the Battery when the load side of contactor K5 is closed.
When the internal Accessory Pump pressure switch is closed, it connects the negative side of the Pump motor
to battery ground. The pressure switch works as follows:
• When the wand trigger is pressed and the pressure in the wand solution hose drops to a predetermined
level, the pressure switch switches on the Accessory Pump.
• When the wand trigger is released, the Accessory Pump will continue to run momentarily. When the
pressure in the wand solution hose increases to a predetermined level, the pressure switch switches off
the Accessory Pump.
To Next Page
Loading...
Need help?
General
