Nilfisk-Advance CMAX 28/34ST Service Manual
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Nilfisk-Advance CMAX 28/34ST Service Manual

Advance models 56396010, 56397403, 56397400, 56397401 nilfisk models 56396011, 56396012, 56397402
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CMAX
™
I-MAX
™
BA 750/850ST, BA 750C
SERVICE MANUAL
Advance MODELS 56396010, 56397403,
56397400, 56397401
Nilfisk MODELS 56396011, 56396012,
56397402
28/34ST
28/32C
6/02 revised 12/04 Form Number 56043071

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Summary of Contents for Nilfisk-Advance CMAX 28/34ST

  • Page 1 CMAX 28/34ST ™ I-MAX 28/32C ™ BA 750/850ST, BA 750C SERVICE MANUAL Advance MODELS 56396010, 56397403, 56397400, 56397401 Nilfisk MODELS 56396011, 56396012, 56397402 6/02 revised 12/04 Form Number 56043071...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS GENERAL INFORMATION ..............................2 SAFETY INSTRUCTIONS ..............................3 SPECIFICATIONS & MAINTENANCE ..........................4-6 PM CHECKLIST ................................7-8 KNOW YOUR MACHINE ............................... 9-13 SOLUTION SYSTEM ..............................14-19 FUNCTIONAL OVERVIEW .............................. 14 CIRCUIT OVERVIEW SOLUTION AUTO MODE ......................15 SOLUTION SYSTEM MAINTENANCE ..........................

  • Page 3: General Information

    Repairs, when required, should be performed by your Authorized Nilfisk-Advance Service Center, who employs factory trained service personnel, and maintains an inventory of Nilfisk-Advance original replacement parts and accessories. Call the NILFISK-ADVANCE DEALER named below for repair parts or service. Please specify the Model and Serial Number when discussing your machine.

  • Page 4: Safety Instructions

    • This machine is not suitable for picking up hazardous dust. • Use care when using scarifier discs and grinding stones. Nilfisk-Advance will not be held responsible for any damage to floor surfaces caused by scarifiers or grinding stones. •...

  • Page 5: Specifications & Maintenance

    SPECIFICATIONS Model designation: (A)=CMAX 28ST & BA 750ST, (B)=BA 850ST, (C)=I-MAX 28C & BA 750C, (D)=I-MAX 32C, (E)=CMAX 34ST General Specifications 24V (disc) 24V (disc) 36V (cylindrical) 36V (cylindrical) 36V (disc) Machine Length (English) 64 in. 65 in. 67.5 in. 67.5 in.
  • Page 6 SPECIFICATIONS Squeegee Width Width TOP VIEW Length Height SIDE VIEW FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C - 5...

  • Page 7: Maintenance Schedule

    MAINTENANCE MAINTENANCE SCHEDULE Maintenance intervals given are for average operating conditions. Machines used in severe operational environments may require service more often. MAINTENANCE ITEM Daily Weekly Monthly Yearly Charge the Batteries Drain / Clean and Check Tanks & Hoses Check / Clean / Rotate the Brushes/Pads Check / Clean / Adjust the Squeegee Check / Clean Vacuum Shut-Off Float Clean Hopper on Cylindrical System...

  • Page 8: Pm Checklist

    56041518, 56041519 & 56041520. WORK COMPLETED BY: ACKNOWLEDGED BY: Service Technician Signature Date Customer Signature Date Copyright 2002 Nilfisk-Advance. 5/06/02 FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C - 7...
  • Page 9 56041518, 56041519 & 56041520. WORK COMPLETED BY: ACKNOWLEDGED BY: Service Technician Signature Date Customer Signature Date Copyright 2002 Nilfisk-Advance. 5/06/02 8 - FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C...

  • Page 10: Know Your Machine

    KNOW YOUR MACHINE Solution Tank Fill Wheel Drive Circuit Breaker (30 Amp) Recovery Tank Cover Control Circuit Circuit Breaker (5 Amp) Drive Paddle Brush Deck Solution Drain Hose / Level Indicator Operator Control Handle Recovery Drain Hose Operator Hand Brake (optional) Squeegee Adjustment Bolt Squeegee Lever Squeegee Blade Latch...

  • Page 11: Control Panel

    KNOW YOUR MACHINE CONTROL PANEL Scrub Pressure/Hourmeter Display Master On/Off Key Switch Solution System Indicator Solution Button Vacuum Button Vacuum System Indicator Scrub ON / Pressure Increase Button Scrub OFF / Pressure Decrease Button Scrub OFF Indicator Battery Condition Indicator 10 - FORM NO.

  • Page 12: Functional Description Of Control Buttons

    KNOW YOUR MACHINE FUNCTIONAL DESCRIPTION OF CONTROLS: Solution Tank Fill (1) – Open to fill the solution tank, use non-foaming chemicals only. Recovery Tank Cover (2) – Point of entry for waste water into tank. Also houses float ball which shuts off vacuum port to vac motor when tank is full.

  • Page 13: Description Of Indicators On The Control Panel

    KNOW YOUR MACHINE Vacuum Button (E) - This button is used to select the mode of operation for the vacuum system. There are 3 modes of operation for this system. These modes are OFF, AUTO, ON. Following is a description of each mode and how they are selected. OFF MODE: In this mode the vacuum is off.
  • Page 14 KNOW YOUR MACHINE DESCRIPTION OF INDICATORS ON THE CONTROL PANEL: (CONTINUED) Vacuum System Indicator (F): • This indicator will be green if the vacuum is on. • This indicator will flash green at a slow rate if the ten second delayed turn-off timer is running. •...

  • Page 15: Solution System

    SOLUTION SYSTEM FUNCTIONAL OVERVIEW ™ ™ The CMAX 28ST, BA 750ST and BA 850ST models have a solution tank fill capacity of 24-gallons (90 liters). The I-MAX 28C/32C, BA 750C ™ and CMAX 34ST models tank capacities are 30-gallons (114 liters). All models use two tank fill openings one located in the front and another in the rear, which offers ease of filling.

  • Page 16: Circuit Overview Solution Auto Mode

    SOLUTION SYSTEM CIRCUIT OVERVIEW SOLUTION AUTO MODE See Figure 2. + (Positive) circuit input starts with: • A closed S3 key switch will direct the needed positive voltage (BRN wires) to the L1 solenoid coil and A1 control board terminal #1. - (Negative) circuit input starts with: •...

  • Page 17: Solution System Maintenance

    SOLUTION SYSTEM SOLUTION SYSTEM MAINTENANCE • Solution Tank: See Figure 1. Weekly empty the solution tank; remove the solution Drain Hose (C) from its storage area (located on the right rear control handle compartment). Direct the hose to a designated “Disposal Site” and flush the tank with clean water. •...

  • Page 18: Troubleshooting Guide

    SOLUTION SYSTEM TROUBLESHOOTING GUIDE ELECTRICAL Possible Symptom Solution solenoid valve will not open when in the scrub auto solution mode. SYMPTOM ONE Note: Do all testing with the key switch on, scrub deck lowered, solution button enabled and the drive paddle activated (pushed Fwd or pulled into Rev).

  • Page 19: Solution Solenoid Valve Removal

    SOLUTION SYSTEM SOLENOID VALVE REMOVAL Drain the solution tank or put the Flow Control Valve Knob (A) (shown in Figure 1) in the full off position to prevent solution loss. Remove the lower left side chassis panel (held in place by 3 screws) and the left side scrub brush skirt assembly from the machine. See Figure 3.

  • Page 20: Solution System

    SOLUTION SYSTEM ™ FIGURE 4A CMAX 28ST, BA 750ST & BA 850ST FRONT ™ ™ ™ FIGURE 4B I-MAX 28C, I-MAX 32C, BA 750C & CMAX 34ST FRONT FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C - 19...

  • Page 21: Scrub Brush System

    SCRUB BRUSH SYSTEM FUNCTIONAL OVERVIEW • Disc Brush System Overview See Figure 2. The machine models CMAX 28ST, CMAX 34ST, BA 750ST & BA 850ST (model #’s 56396010, 56397403, 56396011 & 56396012) use the disc type scrub system. • Cylindrical Brush System Overview See Figure 4.

  • Page 22: Scrub Brush System Troubleshooting

    SCRUB BRUSH SYSTEM • Control and Load circuit detail (continued) The brush remove circuit sequence starts when the operator depresses the control panel scrub off/brush pressure decrease button (H) activating the A1 board’s brush remove function. This triggers (starts) an internal timer relay closing the K1 coil ground circuit, pin #5 (Vio/ Blk wire) turning on momentarily the brush solenoid to run the brush motors.
  • Page 23 SCRUB BRUSH SYSTEM TROUBLESHOOTING GUIDE ELECTRICAL Possible Symptoms Scrub brush motors and solution solenoid valve do not work Scrub brush motors do not work Scrub brush auto remove function does not work (optional) SYMPTOM ONE Scrub brush motors & solution solenoid valve do not work (See Control Panel in Know Your Machine...
  • Page 24 SCRUB BRUSH SYSTEM TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM TWO Scrub Brush Motors Do Not Work Note: Do all testing with key switch on, scrub on switch activated (scrub deck lowered) and drive paddle activated (pushed Fwd or pulled into Rev). Note 2: Enter the Service Test Mode Program in the Electrical System manual section, for alternate machine troubleshooting procedures. Part A: Scrub Brush Motor Load Circuit Troubleshooting Guide Scrub brush motors do not work...
  • Page 25 SCRUB BRUSH SYSTEM TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM TWO Scrub Brush Motors Do Not Work Note: Do all testing with key switch on, scrub on switch activated (scrub deck lowered) and drive paddle activated (pushed Fwd or pulled into Rev). Part B: Scrub Brush Motor Control Circuit Troubleshooting Guide Scrub brushes don't turn (See Figure 1).
  • Page 26 SCRUB BRUSH SYSTEM TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM THREE Scrub Brush Auto Removal Function Does Not Work (Optional) Note before troubleshooting: Check that the automatic remove function is selected (E) enabled. To do this go into the special program option section (electrical system) for instructions to follow to enable or disable the brush remove function. Special Service Note: Read the brush remove function circuit detail in the previous brush system overview section To test: Have the key switch ON, scrub deck raised and the drive system in neutral.
  • Page 27 SCRUB BRUSH SYSTEM TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM THREE Scrub Brush Auto Removal Function Does Not Work (Optional) To test: Have the key switch ON, scrub deck raised and the drive system in neutral. Next to remove the brushes simply depress the control panel scrub OFF switch (H) for one second.

  • Page 28: Scrub Brush Deck Removal (Disc)

    With scrub brushes installed and the brush deck in the up (storage) position disconnect the actuator motor wiring harness pig tail connector. Next connect the Nilfisk-Advance actuator power cord adapter (PN 56407502) to the machine’s battery pack and lift actuator motor pig tail connector.
  • Page 29 SCRUB BRUSH SYSTEM FIGURE 2 FRONT Remove Brush Rotation Remove ™ ™ Note: Figure 2 shows the scrub brush components of the CMAX 28ST, BA 750ST and BA 850ST. Similar components are found on the CMAX 34ST. 28 - FORM NO. 56043071 CMAX ™...
  • Page 30 SCRUB BRUSH SYSTEM FIGURE 3 Positive lead from right motor Negative lead from left motor Negative lead from right motor Jumper Plate These Two Terminals These Two Terminals are Connected with a are Connected with a Jumper Plate (inset) Jumper Plate (inset) Left* Right* Brush...

  • Page 31: Scrub Brush Deck Assembly Removal (Cylindrical)

    With scrub brushes installed and the brush deck in the up (storage) position disconnect the actuator motor wiring harness pig tail connector. Next connect the Nilfisk-Advance actuator power cord adapter (PN 56407502) to the machine’s battery pack and lift actuator motor pig tail connector.
  • Page 32 SCRUB BRUSH SYSTEM SCRUB BRUSH LIFT ACTUATOR REMOVAL (CYL) (CONTINUED) Press the cord adapter rocker switch to momentarily run (jog) the actuator output (up and down) to a position where the bottom deck Actuator Pin (W) is loose (see Figure 4). Remove the Retaining Ring (V) from the lower Actuator Pin (W) and pull the pin from the mount bracket. Remove the Hex Screw (AH) and Nut (AI) that secures the upper Actuator Yoke (AJ) at the frame mount.

  • Page 33: Scrub Brush System

    SCRUB BRUSH SYSTEM FIGURE 5 FRONT 13/16“ to 7/8” (20-22 mm) FIGURE 6 FRONT Brush Left Motor Right Motor Counter-clockwise Counter-clockwise rotation from rotation from Belt shaft end shaft end – – Belt Brush – 32 - FORM NO. 56043071 CMAX ™...

  • Page 34: Recovery System

    RECOVERY SYSTEM FUNCTIONAL OVERVIEW Vacuum / Recovery System General Dirt and water are lifted off the floor into the recovery tank by airflow, created by a 3-Stage 24V or 36V vacuum motor. The wastewater and air enter the vacuum system at the squeegee tool, through small openings (notches) located in the front squeegee blade. The small openings are the entrance points for the water and air, and help speed up the airflow producing the suction to lift the wastewater off of the floor.

  • Page 35: Electrical Diagram

    RECOVERY SYSTEM VACUUM 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 motor solenoid coil and the A1 control board #1terminal (Brn wires).

  • Page 36: Vacuum/Recovery System Maintenance Checklist

    RECOVERY SYSTEM VACUUM / RECOVERY SYSTEM SERVICE MAINTENANCE CHECKLIST Whenever there is a vacuum problem, it’s best to check over the entire system. Use the checklist below as a guide, to thoroughly check the vacuum system. Clean built-up dirt from the inside of the squeegee tool. Replace the squeegee blades if they are nicked or torn.
  • Page 37 RECOVERY SYSTEM TROUBLESHOOTING GUIDE ELECTRICAL Possible Symptom Vacuum motor will not run (auto mode) SYMPTOM ONE Note: Do all testing with key switch on, scrub on switch activated (scrub deck lowered) and drive paddle activated (pushed Fwd or pulled into Rev). Note 2: Enter the Service Test Mode Program in the Electrical System manual section, for alternate machine troubleshooting procedures.

  • Page 38: Troubleshooting Guide

    RECOVERY SYSTEM SYMPTOM ONE Vacuum motor will not run (auto mode) Note: Do all testing with key switch on, scrub on switch activated (scrub deck lowered) and drive paddle activated (pushed Fwd or pulled into Rev). Part B: Vacuum Motor Control Circuit Troubleshooting Guide Vacuum motor will not run (auto mode)

  • Page 39: Maintenance Of Float Cage And Float Duct

    RECOVERY SYSTEM MAINTENANCE OF FLOAT CAGE AND FLOAT DUCT See Figure 3. Open the recovery tank dome lid and lay it to the side, remove the two (A) Screws and pull the Float Duct (B) and float cage assembly (C) from vac motor spacer (D). Snap apart the two float cage halves (C) and flush clean the float ball and cage pieces.
  • Page 40 RECOVERY SYSTEM FIGURE 3 FRONT FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C - 39...

  • Page 41: Squeegee System

    SQUEEGEE SYSTEM SQUEEGEE LIFT LINKAGE ADJUSTMENT See Figure 2. The squeegee pick-up tool is raised and lowered manually by a rear control panel mounted lever. Squeegee Lift Lever Adjustment The squeegee tool’s storage and operating positions are adjustable. To adjust: Remove the recovery drain hose attached to the rear electrical control panel then remove the (6) screws securing the panel.
  • Page 42 SQUEEGEE SYSTEM FIGURE 2 FRONT ™ ™ ™ *Note: Figure 2 shows the squeegee tool for the CMAX 28ST, I-MAX 28C, BA 750ST, and BA 750C, the squeegee tool for the CMAX 34ST, ™ I-MAX 32C, and BA 850ST are similar in adjustment and blade replacement. FORM NO.

  • Page 43: Wheel Drive System

    WHEEL DRIVE SYSTEM GENERAL FUNCTIONAL OVERVIEW See Figures 1 and 3. A 1/2 horsepower permanent magnet (24V or 36V) motor (M1) is used for the wheel drive on all machines. The motor output is delivered to a single front mounted drive wheel driven by a chain as shown in Figure 3. A Curtis PMC solid state speed controller (A2) regulates the variable speed and Fwd/Rev wheel drive motor functions.
  • Page 44 WHEEL DRIVE SYSTEM R2 Voltage Values R1 Voltage Values FIGURE 2 0V = Minimum Speed 0 – 2.5V Forward 5V = Maximum Speed 2.5V – 5V Reverse Key Switch BLK #1 RED/BLK BLK #2 (Partial) reverse wiper R2 25K Ohms R1 5K Ohms BRN/WHT forward...

  • Page 45: Troubleshooting Guide Electrical

    WHEEL DRIVE SYSTEM TROUBLESHOOTING GUIDE ELECTRICAL Possible Symptom No forward and no reverse wheel drive SYMPTOM ONE Note: Do all testing with control panel R2 speed limiting pot in the maximum position, the drive wheel jacked up off the floor, key switch ON, and the drive paddle activated (pushed Fwd or pulled into Rev.) Note 2: Enter the Service Test Mode Program in the Electrical System manual section, for alternate machine troubleshooting procedures.

  • Page 46: Troubleshooting Guide

    WHEEL DRIVE SYSTEM TROUBLESHOOTING GUIDE ELECTRICAL (CONTINUED) SYMPTOM ONE Note: Do all testing with control panel R2 speed limiting pot in the maximum position, the drive wheel jacked up off the floor, key switch ON, and the drive paddle activated (pushed Fwd or pulled into Rev.) Part B: Wheel drive system motor control circuit troubleshooting guide No Fwd or Rev wheel drive (see Figure 1).
  • Page 47 WHEEL DRIVE SYSTEM FIGURE 4 FRONT Motor Sprocket if optional brake is installed 46 - FORM NO. 56043071 CMAX ™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750C...

  • Page 48: Drive Motor Removal (All Models)

    WHEEL DRIVE SYSTEM DRIVE MOTOR REMOVAL (ALL MODELS) WARNING! Disconnect the battery pack before servicing machine. Remove the left side chassis panel to access the drive motor. Disconnect the drive motor wiring connector. See Figure 4. Loosen the (3) Motor Mount Bolts (A) then loosen the Lock Nut (B) and back out Adjustment Bolt (C) several turns to loosen the drive chain tension.

  • Page 49: Drive Wheel Removal (Disc)

    WHEEL DRIVE SYSTEM DRIVE WHEEL REMOVAL (DISC) WARNING! Disconnect the battery pack connector before servicing machine. WARNING! Never work under machine without safety stands or blocking to support the machine. Drain both the solution and recovery tanks. Next place the scrub deck in the up (stored) position, remove the splash guards and scrub brushes.

  • Page 50: Optional Parking Brake Operation

    WHEEL DRIVE SYSTEM CHAIN REMOVAL AND CHAIN ADJUSTMENT (CONTINUED) Chain Adjustment Loosen the (3) Motor Mount Bolts (A) and the adjustment Lock Nut (B) to adjust chain tension. Turn the adjustment Bolt (C) in (CW) to obtain a 1/2" (13mm) chain deflection between the sprockets when moderate pressure is applied to the chain.

  • Page 51: Potentiometer (5K) Testing And Removal

    WHEEL DRIVE SYSTEM 5K POTENTIOMETER TESTING AND REMOVAL WARNING! Disconnect batteries at the battery pack disconnect before servicing. Testing the 5K Potentiometer Note: The potentiometer (pot) doesn’t have to be removed from its housing mount to test. See Figure 8. Remove the front drive paddle Cover (M) from the rear housing (N) held together with (4) item (O) Screws. See Figure 9.

  • Page 52: Potentiometer (25K) Wheel Drive Speed Limit Testing

    WHEEL DRIVE SYSTEM POTENTIOMETER INSTALLATION AND ADJUSTMENT (CONTINUED) Reconnect the ohmmeter test leads to the pot wiper and low terminal connections and adjust (turn the pot) to obtain half of pot’s total resistance. This will accurately set the true neutral drive paddle operator position. Tighten the anchor nut secure.

  • Page 53: Electrical System

    - Use a combination of multiple 2-volt cell units to construct a 24 or 36 Volt DC battery pack system. - Nilfisk-Advance recommended battery pack capacity is a 238 AH @ 20 Hour Rate deep cycle battery system. Note: The battery pack must fit the battery compartment size listed in Specifications.

  • Page 54: Description Of The Battery Condition Indicators

    ELECTRICAL SYSTEM DESCRIPTION OF THE BATTERY CONDITION INDICATORS The Battery Condition Indicator (J) will give an indication of the state of charge of the batteries. The battery condition indicator will retain the state-of-charge even if the key has been turned off. The state-of-charge indication is reset to full charge when the batteries have been recharged. It is also possible to choose between two different low voltage thresholds depending on whether maintenance free or standard batteries are being used (have qualified service engineer perform this selection*).

  • Page 55: Actuator Drive Nut Adjustment

    ELECTRICAL SYSTEM BATTERY TESTING A battery problem is usually recognized by the machine operator, as a decrease in the machine’s running time. This condition is usually caused by one or more “dead cells” in the battery system- that is, one or more cells that is putting out less voltage than the other cells. Note: Always charge batteries before testing.

  • Page 56: Actuator Drive Nut Adjustment

    ELECTRICAL SYSTEM Instructions for Scrub Brush Lift Actuator Drive Nut Adjustment (continued) FIGURE 3 To increase the travel of the spring hous- ing assembly, turn the adjuster clock- wise. To decrease the travel of the assembly, turn the adjuster counter clockwise.

  • Page 57: Functional Overview Of Main Control Board

    ELECTRICAL SYSTEM FUNCTIONAL OVERVIEW OF MAIN CONTROL BOARD The primary function of the main control board is to position the scrubbing brushes with respect to the floor surface using a lift actuator motor to maintain the correct brush pressure and current draw of the brush motor. See Figure 5. When the Scrub On/Pressure Increase Button (G) is depressed this will lower the scrub deck to the operating position and by pushing or pulling the operator drive paddle start the brush motors.

  • Page 58: Main Controller Diagnostic Service Test Mode

    ELECTRICAL SYSTEM SERVICE TEST MODE: The purpose of the service test mode program is to assist the service repairperson with numerous quick short-cut troubleshooting procedures. These test instructions allow for the separate control of each individual electrical system component independent of the normal machine operator inputs.
  • Page 59 ELECTRICAL SYSTEM SERVICE TEST MODE (CONTINUED) Main Controller Inputs See Figure 5 for button locations. Battery status red indicator (K): Speed control forward/reverse signal. This is an output from the speed control to the main control unit that indicates when the throttle has been moved from the neutral position either forward or reverse.
  • Page 60 ELECTRICAL SYSTEM SERVICE TEST MODE (CONTINUED) Scrub ON/Pressure-increase Switch (G): This switch is used to control the output to the scrub deck lift actuator. Pressing and releasing this switch will cycle the actuator output through 4 states. These are: 1 - output off, direction = up 2 - output on, direction = down 3 - output off, direction = down 4 - output on, direction = up...

  • Page 61: Main Control Board Special Program Options

    ELECTRICAL SYSTEM MAIN CONTROL BOARD SPECIAL PROGRAM OPTIONS Recall Display of the Main Control Board Software Revision Level: If it is desired to recall the machine’s (A1) main control board software level perform the following steps: Turn the master on/off key switch to the off position. Press and hold the scrub off/pressure-decrease and solution switches.
  • Page 62 ELECTRICAL SYSTEM CURRENT DRAW OF SCRUB BRUSH MOTORS Model designation: (A)=CMAX 28ST & BA 750ST, (B)=BA 850ST, (C)=I-MAX 28C & BA 750C, (D)=I-MAX 32C, (E)=CMAX 34ST 24V* 36V* PA# 3/4 HP PA# 3/4 HP 3/4 HP Models A & B Models C &...
  • Page 63 ELECTRICAL SYSTEM SPECIAL PROGRAM OPTIONS (CONTINUED) Enabling or Disabling the Vacuum Automatic Shutoff Option: FACTORY DEFAULT: ENABLED To indicate to the operator that the recovery tank is full, the control system will automatically turn off the vacuum and display “FULL” on the hourmeter/status display if the recovery tank becomes filled.

  • Page 64: Electrical Component Location

    ELECTRICAL SYSTEM COMPONENT LOCATION Item Description Speed Control Display Panel Assembly Fuse 150 Amp Circuit Breaker 5 Amp (Control) Circuit Breaker 30 Amp (Wheel Drive) Contactor (Vac Motor) Contactor (Brush Motor) Solution Solenoid Valve Actuator Motor (Brush Lift) Vac Motor Assembly Motor and Gear Unit (Disc) Motor (Cylindrical) Motor (Wheel Drive)

  • Page 65: Wiring Diagram

    ELECTRICAL SYSTEM WIRING DIAGRAM / SCHEMATIC FUSE, 150A BATTERY 24VDC OR 36VDC Item Description Control PCB Assy CONTROL BOARD Control, DC Curtis 14 B+2 Batteries* 1 B+1 BLK/WHT CIRCUIT BREAKER 5 BRUSH CONTACTOR 5 AMP VIO/BLK 6 VACUUM CONTACTOR Fuse, 150 Amp SWITCH 7 SOLUTION VIO/YEL...

  • Page 66: Wiring Schematic

    ELECTRICAL SYSTEM GRN 16-2 RED/GRN 18-1 CONTROL BOARD BLK/WHT 18-1 BLK/YEL 18-1 RED/BLK 22-2 WHT/GRN 18-1 VIO/BLK 18-1 VIO/YEL 18-1 BLK 16-2 GRN 16-2 BRN 16-1 ORN/BLK 18-1 YEL 22-1 RED/BLK 22-1 GRN 16-1 BRN 16-2 ORN 18-1 GRA/BLK 18-1 POT.
  • Page 67 Austria (Sales Sub) Holland (Sales Sub) Nilfi sk-Advance GmbH Phone: +43 Nilfi sk-Advance B.V. Phone: +31 Voralberger Allee 46 1616 58 30 22 Camerastraat 9 (2e verdieping) 36 546 07 00 A-1230 Wien Fax: +43 1322 BB Almere Fax: +31 info@nilfi...
  • Page 68 Sweden (Prod.) Hong Kong (Sales Sub) Nilfi sk-Advance A/S Phone: +46 Nilfi sk-Advance Ltd. Phone: +852 Åmål Branch 5321 7500 2001 HK Worsted Mills Ind’l Bldg., 2427 5951 Strömsbergsgatan Fax: +46 31-39 Wo Tong Tsui St. Fax: +852 Box 127 5321 7595 Kwai Chung, Hong Kong 2487 5828...
  • Page 69 © 2004 Printed in USA...

This manual is also suitable for:

I-max 28/32cBa 750/850stCmax 28stI-max 28cI-max 32cBa 750st ... Show all

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