Nilfisk-Advance SC6500 40C User Manual

Control System 49Service Manual – SC6500
™
Display
Code
Error/Fault Description Correction
19
Back-up alarm overload
Specications:
• 5-15 VDC
• Current load 100 ma
1. Check for a back-up alarm wiring problem or short
circuit* (wire colors: positive ORN/BRN; negative
BLU/WHT).
2. Disconnect the back-up alarm and test to see if the
wiring is shorted. If not, replace the back-up alarm.
20
Horn output fault
Current load spec. 1.2 amps
1. The horn or horn wiring’s +36V power feed is shorted
to ground (wire colors VIO and BLU/RED).
2. Disconnect the horn and test to see if the wiring is
shorted. If not, replace the horn.
21
Scrub motor open 1. Check for an open circuit in the motor wiring or for a
defective motor.
2. Check for 36 volts at the scrub motor that is not
running. If you get 0 Volts, replace the brush motor
contactor.
22
Left brush motor contactor coil open 1. Check for an open circuit in the K4 coil and wiring
(wire colors VIO and GRA/RED).
2. Test for 36V at the K4 coil. If you get 0 Volts, check
the A2 control board assembly.
23
Left brush motor contactor coil short
to ground
1. Disconnect the K4 coil wiring (wire colors VIO and
GRA/RED) and check to see if the code disappears.
− If the code disappears, replace the brush contactor.
− If the code does reappear, test the wiring for a short
back to the battery ground. Repair or replace the
defective wire.
2. If the above test doesn’t remove the code, substitute
a new A2 control board assembly.
24
Center brush motor contactor coil
open
1. Check for an open circuit in the K3 coil and wiring
(wire colors VIO and WHT/VIO).
2. Test for 36V at the K3 coil. If you get 0 Volts, check
the A2 control board assembly.
25
Center brush motor contactor coil
short to ground
1. Disconnect the K3 coil wiring (wire colors VIO and
WHT/VIO) and check to see if the code disappears.
− If the code disappears, replace the brush contactor.
− If the code does reappear, test the wiring for a short
back to the battery ground. Repair or replace the
defective wire.
2. If the above test doesn’t remove the code, substitute
a new A2 control board assembly.
26
Right brush motor contactor coil
open
1. Check for an open circuit in the K2 coil and wiring
(wire colors VIO and YEL/BLU).
2. Test for 36V at the K2 coil. If you get 0 Volts, check
the A2 control board assembly.

Nilfisk-Advance SC6500 40C Specifications

General

Brand	Nilfisk-Advance
Model	SC6500 40C
Category	Scrubber
Language	English