Nilfisk-Advance 56390900 Service Manual page 60

Error Code Fault Description
E17 Scrub deck lift actuator circuit open (**)
E18 Scrub deck lift actuator short
E19 Squeegee lift actuator circuit open (**)
E20 Squeegee lift actuator short
E21 Scrub motor circuit open (**)
E22 Scrub motor short
E23 Vacuum motor circuit open (**)
E24 Vacuum motor short
E25 Solution solenoid circuit open (**)
E26 Coil / solution solenoid short
E27 No accessory / wiring
*Short Circuit definition:
• 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.
*** See the Main Control Board Special Program Options section to activate the Brush Type Selection function.
60 - FORM NO. 56043136 - Adgressor
MAIN CONTROL BOARD ERROR CODES
Troubleshooting Action
1. Check for disconnected actuator wiring, open in wiring or defective actuator
motor. Repair or replace. 2. Check controller output voltage should be 36V if 0V
controller failure (replace).
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.
1. Check for disconnected actuator wiring, open in wiring or defective actuator
motor, Repair or replace. 2. Check controller output voltage should be 36V if
0V controller failure (replace).
Check for binding or frozen squeegee lift linkage and excessive weight on
squeegee. 2. Check for short circuit* in wiring or actuator motor. Repair or
replace.
1. Check for open in brush motor wiring or defective motor.
2. Check the negative supply cable at the brush motor for a wiring problem or
improper modifications (this is a special cable and must be replaced with the
original OEM).
3. Check resistance on brush motor solenoid. Nominal resistance specs are:
• K1 - White-Rodgers brand = 120 Ohms
• K1 - Ametek® brand = 98.5 Ohms
If the resistance is less than 20% from spec, replace the solenoid.
4. Check if brushes are installed.
Same as E06.
1. Check for disconnected vacuum motor wiring, open in wiring and defective
vacuum motor. Repair or replace.
2. Check resistance on vac motor solenoid. Nominal resistance specs are:
• K2 - White-Rodgers brand = 120 Ohms
• K2 - Ametek® brand = 102 Ohms
If the resistance is less than 20% from spec, replace the solenoid.
3. Check controller output voltage should be 36V if 0V controller failure
(replace).
Same as E07
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).
1. Check for a short circuit* in wiring or solenoid coil. Repair or replace.
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).
/ BR 850S, BR 1050S
™
Electrical System