Troubleshooting Guide; Main Controller Error Codes - Nilfisk-Advance 34 RST EcoFlex Service Manual

Control Panel

Troubleshooting Guide

Any error codes detected by the main control board will be displayed on the display
panel as they occur. If more than one error exists the display will sequence through
the error codes at one-second intervals. On EcoFlex models the error (D2) will
display as a mechanical wrench symbol followed by a two-digit code. On standard
models the hour meter / error display (J2) will flash an "E" and 2 numbers one at a
time.
When troubleshooting any "Fault Description" noted with a double asterisk (**)
follow the instructions for entering the Service Test Mode in the control board's
special programs. See the Main Control Board Special Program Options section in
this manual.

Main Controller Error Codes

Error Description
E03 Drive system fault.
E04 Scrub deck lift actuator overload. • Inspect the scrub deck for obstruction.
E06 Scrub motor overload
E07 Vacuum motor overload
30 - FORM NO. 56043115 - 34 RST
Comments
On standard models, the Regular Scrub On indicator (i1) will flash
out the specific error code from the Curtis Drive controller. On
EcoFlex models, the Wand indicator (E) will flash out a specific
Curtis Drive controller error code. See the Wheel System, Traction
chapter troubleshooting section for a list of error codes.
• Measure the actuator amperage with and without the scrub deck
connected.
• No-load current = 1.4 amps
• Normal current = 1.0-2.5 Amps
• Maximum current = 6 Amps
• If the no-load current remains high, then the actuator or wiring is
faulty.
• Check the scrub setting adjustments described previously in this
chapter.
• Check for binding in rotation of brushes or improper deck lift
actuator operation.
• Inspect the ground wire supplying the brush motors for poor or
corroded connections. The voltage drop across this wire is used to
measure the amperage to the motors.
• Inspect the current sense wire (white/gray) for continuity.
• Inspect the vacuum motor impeller for obstruction.
• Check the vacuum discharge for obstruction (inlet obstruction will
reduce the amperage).
• Normal current load 17-19 Amps.
• Inspect the vacuum motor brushes
• Defective motor bearings.
• Inspect the current sense wire (orange) for continuity
J2
E
Ø.4
D2
03