12/2017
A - 59
56091204 - Nilfisk Liberty SC50
ENGLISH - A
INSTRUCTIONS FOR USE
6/2020
TROUBLESHOOTING
GENERAL MACHINE TROUBLESHOOTING
Problem
Possible Cause
Remedy
Poor water pick-up
Vacuum hose not connected to the squeegee assembly
Connect vacuum hose to squeegee assembly
Worn or torn squeegee blades
Reverse or replace
Squeegee out of adjustment
Adjust so blades touch floor evenly
across entire width
Recovery tank full
Empty recovery tank
Recovery Tank Drain Hose
(37)
leak
Secure drain hose cap or replace
Recovery Tank Gasket
(47)
leak
Seat gasket properly / Replace gasket
Debris caught in Squeegee
(11)
Clean squeegee assembly
Recovery Hose between squeegee and recovery tank
clogged
Remove debris
Using too much solution
Reduce flow via control panel solution switch
Vacuum OFF or set to quiet mode
Turn vacuum ON or set vacuum to high
Poor scrubbing performance
Worn brush or pad
Replace brush or pad
Wrong brush or pad type
Consult Nilfisk
Wrong cleaning detergent
Consult Nilfisk
Moving machine too fast
Slow down
Not using enough scrub pressure
Increase scrub pressure
Not using enough solution
Increase solution flow
Inadequate or no solution
flow
Solution tank empty
Fill solution tank
Solution filter
(33),
lines or valves clogged
Clean solution filter and flush lines
Solution Shutoff Valve
(34)
closed
Open solution shutoff valve
Solution Solenoid Valve
(32)
plugged or defective
Clean or replace valve
Solution pump
(35)
air locked
(contact Nilfisk Authorized Service Center)
Solution tank empty Indicator
(X23)
appears when there is
solution in the tank
No solution flow
See Problem “Inadequate or no solution flow” check remedies for
no solution flow.
Solution sensor (flow meter) failed
Change menu Option “Ignore water meter?” to Yes, to use
machine until sensor can be fixed.
(contact Nilfisk Authorized Service Center)
Machine does not power ON
Machine Battery Connector
(43)
disconnected
Reconnect battery connectors
Tripped 5 Amp circuit breaker
(E)
Check for electrical short circuit & reset
Blown Main Fuse 100 Amp
(42)
Replace Main Fuse 100 Amp
Charger Interlock engaged
Unplug Charger
No FWD/REV wheel drive
A direction has not been selected
Press
(Q)
to select Forward direction or press
(R)
to select
Reverse direction.
Speed Adjustment Knob
(P)
rotated to none
Rotate Speed Adjustment Knob
(P)
clockwise
Emergency Stop
(D)
activated, display will indicate
“Release the red emergency stop button to continue.”
along with Fault Indicator
(X14)
Reset the Emergency Stop
Drive system speed controller
Check error fault codes
(contact Nilfisk Authorized Service Center)
No Detergent Flow
Empty Detergent Cartridge
(3)
Fill detergent cartridge
Plugged or kinked detergent flow line
Purge system, straighten lines to
remove any kinks
Detergent pump
Check pump, wiring and lines
Magnetic SmartKey Errors
No Key Indicator
(X19)
.
-No Magnetic SmartKey is present on the SmartKey
Reader
(A)
.
Place an appropriate SmartKey onto the SmartKey Reader.
Key Read Error Indicator
(X20)
.
- Magnetic SmartKey present on the SmartKey Reader
(A)
cannot be read.
Clean both the SmartKey and the SmartKey Reader using a
clean cloth. Depress the SmartKey between your thumb and
forefinger to insure free movement of the magnet.
Restricted User Key Indicator
(X21)
.
-Magnetic SmartKey present on the SmartKey Reader
(A)
is not programmed to be used with this machine.
Place a SmartKey that has been programmed to be used with
this machine onto the SmartKey Reader.