Advance acoustic Adhancer56316000(W28-C) Service Manual

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Advance acoustic Adhancer56316000(W28-C) Service Manual Manual pdf 22 page image

20 - FORM NO. 56043111 - Adhancer ™SCRUB SYSTEMFUNCTIONAL OVERVIEWAdhancer Brush System OverviewSee Figure 2. The Adhancer models use two cylindrical brushes that counter-rotate to sweep up light debris and scrub at the same time. The scrub brushes arepowered on opposing ends by permanent-magnet motors attached to separate poly-V belt/pulley drives. The front brush on current models is powered by a .75 HPmotor and rotates at 900 RPM. The rear brush is powered by a 1.25 HP motor and rotates at 1500 RPM.General Brush OverviewNote: Recovery Tank Full switch must be open (Tank empty). On all models the scrub deck platform is raised and lowered automatically by a vertically-mountedelectric lift actuator motor. The operation of the machine’s scrub functions are activated when the operator selects (presses) the Scrub On panel button.See Figure 1. The machine’s main scrub system input and output operating functions are regulated (managed) by the display panel and combined main controlboard A1. The major scrub system functions are:M2 / M3 - Scrub Brush Motor Run FunctionCircuit Overview of the Scrub Brush Motors+ (Positive) Circuit input starts with:A battery positive input to the K1 solenoid coil (BRN wire).A battery positive input to the load side of the K1 solenoid (RED wire).A closed S3 key switch to direct the needed positive voltage to terminal #J1-13 - B+1 on the A1 control board (BRN wire), and to PIN 5 – KSI (BRN wire) on theA2 Speed Controller.Note: The A1 control board scrub-on button must also be depressed (enabled). This operator command lowers the brush deck. Once the K1 load is closed, theneeded positive load voltage is supplied to motors M2 and M3 from battery positive.- (Negative) Circuit input starts with:A battery negative ground input at the A1 control board terminals B2 (J1-9), B-3 (J2-9) and B-4 (J2-6) (BLK wires).Note: The A1 control board scrub-on button must also be depressed (enabled). This operator command lowers the brush deck.A negative voltage output from PIN #6 – BRAKE (-) on the A2 speed controller (RED/BLK wire) to terminal J1-5 – FOR/REV. on the A1 control board. Note: TheA2 speed control BRAKE (-) output (PIN #6) occurs whenever the R1 direction throttle pot is moved off its neutral setting.A negative voltage output from terminal J1-14 – BRUSH CONTACTOR on the A1 Control Board (VIO/BLK wire) to complete the K1 solenoid coil circuit (positiveand negative) and pull in the load contact to make the brush motors run.The negative load voltage to motors M2 and M3 supplied from the battery negative.M2/M3 scrub brush motor overload functionThe scrub brush motors are protected from excessive (damaging) electrical current overload by a current-sensing circuit that communicates data to the A1 maincontrol board.The brush circuit’s large BLK negative (-) high-current load wire is specifically constructed with a known (specified) resistance value. When the motors are running, asmall voltage drop is detected across it which is proportional to the actual combined current draw of both brush motors. This voltage change (data) is inputted to theA1 control board at the J2-5 (WHT/GRA) and J1-7 (BLK) brush motor sense wires. When the controller senses an overload current value above 48 Amps the scrubsystem is automatically shut down. At the same time the scrub overload fault error code 06 is displayed on the operator’s control panel.NOTE: Reference the main controller error codes table 2 that shows further information on the error code 06 scrub brush overload.M5 - Scrub Brush Actuator Lift Motor FunctionThe J2-8 BRUSH ACTUATOR 1 output (WHT/GRN) wire and the J2-1 BRUSH ACTUATOR 2 output (VIO/YEL) wire provide reversible-polarity voltage to raise andlower the scrub deck for the automatic scrub function. The scrub deck operating position is fixed. The M5 actuator lowers the deck for a pre-determined time periodof four seconds to allow the deck’s three caster wheels to make even contact with the floor.Scrub System Low-voltage Cut-out FunctionThe purpose of the special low-battery voltage cut-out function is to help prolong battery life. The scrub deck will be raised, and the brush motors and solutionsolenoid valve will turn off automatically and cease to function when the batteries discharge to the selected cut-out threshold. You can select between two low-voltage cut-out thresholds. The standard setting (wet cell/lead acid batteries) is 31.0 volts (1.72 volts per cell), and the alternate setting (gel/maintenance-freebatteries) is 33.0 volts (1.83 volts per cell).Note: See the Electrical System/Main Control Programming Options section for instructions on how to select the low-voltage cut-out threshold.