Nilfisk-Advance 56314019, Service Manual

Page: 61 / 82

ELECTRICAL SYSTEM
FORM NO. 56043089 / AquaRide
™
/ BRX 700 - 59
Error Code Fault Description Troubleshooting Action
E07 Vacuum motor overload 1. Check for debris in vac motor. 2. Worn carbon brushes.
Normal current load 17-19 Amps 3. Defective motor bearings. 4. Check for short circuit* in
(1 motor). Normal current load vac motor or wiring. Repair or replace.
34-38 Amps (2 motors)
E08 Solution solenoid overload 1. Check for a wiring problem. 2. Check coil resistance (spec. is
185 Ohms + or – 15%). Replace solution solenoid if lower than
157 Ohms.
E17 Scrub deck lift actuator 1. Check for disconnected actuator wiring, open in
circuit open (**) wiring or defective actuator motor. Repair or replace. 2. Check
controller output voltage should be 36V if 0V controller failure
(replace).
E18 Scrub deck lift actuator short 1. Check for binding or frozen brush lift linkage and excessive weight
on brush deck. 2. Check for short circuit* in brush lift motor and
wiring. Repair or replace.
E21 Scrub motor circuit open (**) 1. Check for open in brush motor wiring or defective motor. 2.
Brush solenoid coil resistance Check the negative supply cable at the brush motor for a wiring
120 Ohms +/- 10% problem or improper modifi cations (this is a special cable and must
be replaced with the original OEM). 3. Replace defective brush motor
contactor. 4. Check if brushes are installed.
E22 Scrub motor short Same as E06.
E23 Vacuum motor circuit open (**) 1. Check for disconnected vacuum motor wiring, open in
Vac solenoid coil resistance wiring, defective vacuum motor and vac contactor failure.
120 Ohms +/- 10% Repair or replace. 2. Check controller output voltage should be 36V
if 0V controller failure (replace).
E24 Vacuum motor short Same as E07
E25 Solution solenoid circuit open (**) 1. Check for disconnected solenoid wiring plug, open in wiring or
defective solenoid. Repair or replace. 2. Check controller output
voltage should be 36V if 0V controller failure (replace).
E26 Coil / solution solenoid short 1. Check for a short circuit* in wiring or solenoid coil. Repair or
replace.
E27 No accessory / wiring 1. Loss of battery (pos.) output to all system contactors (brush,
solution solenoid and vacuum) and system accessories (headlight,
warning beacon, solution pump). 2. Check controller accessory
terminal output (J2-8 Wht/Brn wire) voltage should be 36V if 0V
controller failure (replace).
MAIN CONTROLLER ERROR CODES (CONTINUED)
*Short Circuit defi nition:
• A short circuit is a parallel path of very low resistance, often caused accidentally.
• With low resistance there is an excessive amount of current.
• The excessive current will either melt the wires or open a fusible link.