A - 50
Nilfisk Liberty SC50 - 56091204
12/2017
INSTRUCTIONS FOR USE
A - ENGLISH
6/2020
OPERATING THE MACHINE MANUAL MODE
WARNING!
Be sure you understand the operator controls and their functions.
While on ramps or inclines, avoid sudden stops. Avoid abrupt sharp turns. Use low speed down ramps.
1 Follow the instructions in “Starting the Machine” section and drive the machine to the start point for cleaning.
2 Press and hold the Solution Switch
(J)
to pre-wet the brush or pad, solution will be dispensed at the HIGH rate while the switch is held.
NOTE:
This will help prevent scarring of the floor surface when starting to scrub with dry brushes. This can only be done prior to pressing the
One-Touch Scrub Switch
(M)
. Additionally when the machine starts scrubbing the solution will flow at the High rate for 2 seconds to flood the
floor.
3 Press the One-Touch Scrub ON Switch
(M)
once for Regular Scrub. Press the Extra Pressure Switch
(N)
once for Heavy Scrub. The solution
flow has settings that coincide with the scrub pressure, it will increase and decrease along with the scrub pressure.
NOTE:
The solution flow rate can also be increased or decreased independently of the scrub pressure by pressing the Solution Flow
Adjustment Switch
(J)
, observe the Solution Flow Rate Bar Graph
(X10)
(see Control Panel). Any subsequent scrub pressure adjustments
will reset the solution flow rate to default.
4 When the One-Touch Scrub ON Switch
(M)
is selected, the brushes and squeegee are automatically lowered to the floor. The scrub, solution,
vacuum and detergent systems are all automatically enabled and will start when the Go Pedal
(24)
is activated. Any individual system can be
adjusted or turned OFF or ON by simply pressing its switch at any time during scrubbing.
Scrub Pressure:
Each press of the Extra Brush Pressure Switch
(N)
will change between REGULAR pressure and HEAVY pressure (shown
on the display
(X12)
). The scrub system can only be turned OFF by pressing the One-Touch Scrub Switch
(M)
.
Solution:
The solution flow rate can be changed independently of the scrub pressure by pressing the Solution Switch
(J)
. Each press of the
switch will cycle between LOW, MEDIUM, HIGH, OFF and back to LOW. The setting is shown on the display
(X10)
.
Vacuum:
The vacuum level can be changed independently. The default setting is REGULAR mode. Each press of the Vacuum Switch
(L)
will cycle between QUIET, OFF and REGULAR. The setting is shown on the display
(X5)
.
NOTE:
To pick up solution without scrubbing, press the Vacuum Switch
(L)
while in transport mode. This will cause the squeegee to
lower and the vac motor to turn ON at the REGULAR level.
Detergent:
See “Detergent System Preparation and Use (EcoFlex)” for more detailed information regarding the adjustment and use of the
detergent system.
5a
Daily Scrub:
Begin scrubbing by driving the machine forward in a straight line at a normal walking speed and overlap each path by 2-3
inches (50-75 mm). Adjust the machine speed and scrub parameters when necessary according to the condition of the floor.
5b
Floor Finish Removal (REV model only):
Ensure there is a red pad attached directly to the fixed pad driver and that the maroon SPP pad is
not attached to the fixed pad driver. Adjust the scrub parameters as follows: Adjust the machine speed potentiometer to a slow scrub speed
approximated by that shown in Figure 3-11
(P)
. Adjust the solution flow rate to low, the scrub pressure to high and turn detergent off. The
vacuum power setting can be set to either quiet or regular mode. Floor finish removal should be done in manual mode only.
6 Press the Burst of Power Switch
(O)
to temporarily (1 minute) engage the high detergent strength, extra scrub pressure, full vacuum power
and increase the solution flow rate to the next available level. The Burst of Power Indicator
(X22)
will display along with a 60 second
countdown timer, after which all scrub parameters will return to their previous state.
7 When scrubbing, check behind the machine occasionally to see that all of the used solution is being picked up. If there is water trailing the
machine, you may be dispensing too much solution, the recovery tank may be full, or the squeegee tool may require adjustment.
8 The recovery tank has a Tank Full Switch
(21)
that causes ALL systems to turn OFF except the drive system when the recovery tank is full.
When this switch is activated, the recovery tank must be emptied. The machine will not pick up water or scrub with the switch activated.
NOTE:
Scrub, solution and detergent indicators vanish and the Recovery Tank Full Indicator
(X16)
appears on the Display Panel when the
switch is activated.
9 When the operator wants to stop scrubbing:
Press the One-Touch Scrub Switch
(M)
once. This will automatically stop the scrub brushes and solution flow and the scrub deck will raise
up. The squeegee will raise up after a brief delay with the scrub deck and the vacuum will stop after an additional delay (this is to allow any
remaining water to be picked up without turning the vacuum back on) if the vacuum switch is pressed during this time delay the vacuum will
turn off.
10 Drive the machine to a designated waste water “DISPOSAL SITE” and empty the recovery tank. To empty, pull the Recovery Tank Drain Hose
(37)
from its rear storage area, then unscrew the cap (hold the end of the hose above the water level in the tank to avoid sudden, uncontrolled
flow of waste water). The drain hose can be squeezed to regulate the flow. Unlatch
(36)
and lift open the Recovery Tank Cover
(20)
to
inspect and empty the Debris Catch Tray
(23)
in the recovery tank. Refill the solution tank and continue scrubbing.
NOTE:
Make sure the Recovery Tank Cover
(20)
and the Recovery Tank Drain Hose
(37)
cap are properly seated or the machine will not pick-up
water correctly.
When the batteries require recharging the Fault Indicator
(X14)
will come on along with a message stating low battery, the scrub brushes and
solution flow will stop and the scrub deck will raise up. The squeegee will raise up after a brief delay and the vacuum will stop after an additional
delay. Transport the machine to a service area and recharge the batteries according to the instructions in the Charging Gel/AGM (VRLA) Batteries
section of this manual.
