Nilfisk-Advance BRX 700 Service Manual

Also see for 56314019: Instructions for use

Contents

58 - FORM NO. 56043089 / AquaRide ™ / BRX 700ELECTRICAL SYSTEMFUNCTIONAL OVERVIEW OF MAIN CONTROL BOARDThe primary function of the main control board E1 is to position the scrubbing brush(s) with respect to the floor surface using a lift actuator motorto maintain the correct brush pressure and current draw of the brush motor(s). When either the maintenance or restoration scrub mode switch isdepressed this will lower the scrub deck to the operating position and by activating the foot pedal start the brush motor. The controller is continuouslymonitoring the current to the brush motor and when it senses a current draw out of the desired range it automatically raises or lowers the brush deckby turning on the brush actuator motor. This process is repeated until the brush motor is shut off. The controller also manages the other supportivesystems such as the extract deck in reverse lift, solution on/off, and vacuum motor. Note: See the Know Your Machine system in this manual for acomplete explanation of the machine’s operation.The secondary function of the main control is to detect any system failures and display an error code on the hour meter display or store it in the maincontrol board’s recall memory mode. The error code(s) are used to help the serviceperson determine the fault and to quickly guide in repairing aspecific system malfunction. Note: See the Troubleshooting Guide for further information.An additional special feature of the main control board is to change program settings for a set of specific machine functions. See the Main ControlBoard Special Program Options section in this manual for further information.TROUBLESHOOTING GUIDEAny error codes detected by main control board will be displayed on the hour meter LED display as they occur. If more than one-error exists thedisplay will sequence through the error codes at one-second intervals. The error display will show on the hour meter as the letter E followed by atwo-digit code. EX: E03 would be a drive system fault. When troubleshooting any “Fault Description” noted with a double asterisk (**) followthe instructions for temporarily disabling the control boards special fault detection program. See the Main Control Board Special ProgramOptions section in this manual.MAIN CONTROLLER ERROR CODESError Code Fault Description Troubleshooting ActionE03 Drive system fault 1. Check for a tripped drive motor circuit breaker (45 amp). Investigatereason for possible mechanical over load. Examples: sticking brakes,parking brake not released, prolonged ramp climbing. 2. Observe thegreen flashing wand indicator light (location operator panel) then seeCurtis drive motor controller section to further troubleshoot the drivesystem (Table 1).E04 Scrub deck lift actuator overload 1. Check for binding or frozen brush lift linkage andnormal current load 1 - 2.5 Amps excessive weight on brush deck. 2. Check for short circuit*max. current load 6 Amps in brush motor and wiring. Repair or replace.max. current no load 1.4 AmpsE06 Scrub motor overload 1. Check for binding in rotation of brushes or improper brush lift actuatoroperation. 2. Check the negative supply cable at the brush motor for awiring problem or improper modifications and also the small YEL/VIOcurrent sense wire. 3. Check to see that the proper “Scrub Deck MotorType” is selected*** (extract or sweep extract). 4. Check for shortcircuit* in brush motor or wiring. 5. Check excessive belt tension andidler bearing.*** See the Main Control Board Special Program Options section to activate the “Scrub Deck Motor Type” Selection function.