Troubleshooing Guide; Main Controller Error Codes - Nilfisk-Advance Clarke Focus II Large 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. The hour meter / error display (J2) will
lash 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.
Scrub deck lift actuator overload. • Inspect the scrub deck for obstruction.
E04
E06 Scrub motor overload
E07 Vacuum motor overload
E08 Solenoid Bank Coil Circuit
Overload
• Brush Motor Contactor (K1)
• Vacuum Motor contactor (K2)
• Solution Solenoid (L1)
25 - FORM NO. 56043162 - Focus II Large
Comments
The Regular Scrub On indicator (i1) will lash out the speciic error
code from the Curtis Drive controller. 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
The sum of the currents through these coils is too high
• Inspect the "B-3" ground bus (J2-9 wire) at the controller
for negative battery voltage. This error will occur if B-3 is
disconnected.
• If this error occurs when no coils are active (and J2-9 wire is
good), the control board is defective
• Operate various combinations of coils to identify which coil is
causing the problem.
• Check for wiring problems on the coil circuit(s) and repair wiring.
• Check resistance on all contactor/solenoid coils. If the value is less
than 20% of the values below, replace the contactor/solenoid
• Brush motor contactor coil (K1): 98 to 120 Ω
• Vacuum motor contactor coil (K2): 102 to 120 Ω
• Solution solenoid coil (L1): ST 76 Ω
J2
E