Nilfisk-Advance 56315036(28D) Service Manual

Also see for ba 755: Instructions for use Instructions for use Sevice manual Instructions for use

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Nilfisk-Advance 56315036(28D) Service Manual Manual pdf 33 page image

FORM NO. 56043103 - Warrior ™ ST, Warrior ™ AXP / BA 755 series - 31RECOVERY SYSTEMVACUUM MOTOR CONTROL CIRCUIT OVERVIEW (AUTO MODE)See Figure 2.+ (Positive) Circuit input starts with:• A closed S3 key switch supplies the needed positive voltage to the K2 vacuum solenoid coil and the A1 control board J1-13 (Brn wire). Note: The A1 controlboard scrub-on button must also be depressed (enabled). This operator command lowers the brush deck.- (Negative) circuit input starts with:• A battery negative ground input at the A1 control board terminal B-2 (J1-9) and at the A2 speed controller terminal B-.• A negative voltage output from the A2 speed controller’s (pin #6) Brake Neg. to the A1 control boards Red/Blk wire (J1-5) For/Rev. Note: The A2 speed controlbrake output (pin #6) occurs whenever the R1 directional/throttle pot is moved off its neutral setting. This operator command happens when the drive paddle ispushed or pulled to run the wheel drive motor in Fwd or Rev.The recovery tank fl oat switch (S4) must be closed in order for a negative voltage output from the A1 board’s terminal J1-12 Blk/Yel wire to complete the K2solenoid coil circuit (Pos. & Neg.) and pulls in the solenoid load contact making the vacuum motor run.Electrical Diagram*For complete description of all callouts see Electrical System Wiring Diagram.F1FUSE,150A.R1POT.5K OHM THROTTLEK2COILVACUUM MOTORCONTACTORS4SWITCH, FLOATR2POT. 100K OHM SPEED LIMITS3SWSPST KEYM1MOTOR, WHEEL DRIVEMBT1BATTERYF3CIRCUIT BREAKER, 30AMPF2CIRCUIT BREAKER, 5AMPM4MOTOR, VACMK21 212312123+ -1 21 2WHTBRN/BLKYEL/REDREDBRNBLUBRNBLKRED/BLKBRNRED/BLKREDWHT/YELBRNREDREDBLK/YELGRA/WHTORNORNBLUBLKBLKBLKBRNWHTBLUBLKBRNWHTBLKRED BLKBLK+24VDC OR 36VDC-B+1VACUUM CONTACTORFOR/REV.VACUUM MOTOR SENSEJ1-13J1-12B-2A1CONTROL BOARDJ1-5J2-10J2-4J1-9RECOVERY TANK FULL SENSEA2 B+ B-1210 SPEED CONTROLLERM1M2PIN 3-POT. HIPIN 4-POT. WIPERPIN 13-POT. LOPIN 5-KSIPIN 6-BRAKE(-)(1228 FOR 36V)PIN 18-SPEED LIMIT POTBLK1 2FIGURE 2