Nilfisk-Advance AquaRide BRX 700 Service Manual Download Page 66

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64 - FORM NO. 56043089 / AquaRide

™

/ BRX 700

ELECTRICAL SYSTEM

FUNCTIONAL OVERVIEW OF MAIN CONTROL BOARD

The 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 motor to maintain the correct brush pressure and current draw of the brush motor(s). When either the maintenance or
restoration scrub mode switch is depressed this will lower the scrub deck to the operating position and by activating the foot pedal
start the brush motor. The controller is continuously monitoring 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 deck by turning on the brush actuator motor. This process is
repeated until the brush motor is shut off. The controller also manages the other supportive systems 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 a complete 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 main control board’s recall memory mode. The error code(s) are used to help the serviceperson determine the fault
and to quickly guide in repairing a specific 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 Control Board Special Program Options section in this manual for further information.

TROUBLESHOOTING GUIDE

Any 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 the display 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 a two-digit code. EX: E03 would be a drive system fault. When troubleshooting any “Fault Description”

When troubleshooting any “Fault Description”

noted with a double asterisk (**) follow the instructions for temporarily disabling the control boards special fault detection

noted with a double asterisk (**) follow the instructions for temporarily disabling the control boards special fault detection
program.

program.

program. See the

Main Control Board Special Program Options section in this manual.

MAIN CONTROLLER ERROR CODES

Error Code

Fault Description

Troubleshooting Action

E03

Drive system fault

1. Check for a tripped drive motor circuit breaker (45 amp).
Investigate reason for possible mechanical over load. Ex-
amples: sticking brakes, parking brake not released, pro-
longed ramp climbing. 2. Observe the green flashing wand
indicator light (location operator panel) then see Curtis drive
motor controller section to further troubleshoot the drive
system (Table 1)

(Table 1)

(Table 1).

E04

Scrub deck lift actuator overload

1. Check for binding or frozen brush lift linkage and

normal 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 Amps

E06

Scrub motor overload

1. Check for binding in rotation of brushes or improper brush
lift actuator operation. 2. Check the negative supply cable at
the brush motor for a wiring problem or improper modifica-
tions and also the small YEL/VIO current sense wire. 3.
Check to see that the proper “Scrub Deck Motor Type” is
selected***

***

*** (extract or sweep extract). 4. Check for short

circuit* in brush motor or wiring. 5. Check excessive belt
tension and idler bearing.

***

*** See the

Main Control Board Special Program Options section to activate the “Scrub Deck Motor Type” Selection

function.