Nilfisk-Advance 56314019 Service Manual Download

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58 - 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 fl oor 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
specifi c 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 specifi c 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” noted with a double asterisk (**) follow
the instructions for temporarily disabling the control boards special fault detection 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. Examples: sticking brakes,
parking brake not released, prolonged ramp climbing. 2. Observe the
green fl ashing wand indicator light (location operator panel) then see
Curtis drive motor controller section to further troubleshoot the drive
system (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 modifi cations 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.