Sunmax RT15 User guide

This manual is used as a product description.
The Company reserves the right of final interpretation.
sunmaxfds.com
RT15 Floor Scrubber
Manual of Instructions

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Number
Category
Unit
Parameter
1
Cleaning efficiency
sqft/h
14500
2
Brush plate width
inch
13.8
3
Squeegee width
inch
17.8
4
Brush plate rotation speed
rpm
180
5
Brush plate motor power
w
300
6
Water suction motor power
w
500
7
Clean water tank capacity
gal
3
8
Sewage tank capacity
gal
4
9
Battery capacity
V/Ah
24/32
10
Charging time
h
6-10
11
Working time
h
1.5-2
12
Total weight
LB
99
13
Product size
inch
27.5*18*41.3
14
Packing size
inch
35.1*21.5*43
Chapter I
Operation Safety Guidance
1.1 General Instructions
This manual offers necessary instructions for operation and maintenance of
the machine. Please read it carefully and make sure that you have understood
it before getting started. If you need to purchase spare parts, please refer to
the spare part handbook attached to this manual. You can purchase them from
any authorized service center or distributor. This product is able to provide
excellent services, and you can achieve the best effects at the lowest cost if
you abide by the following principles:
Operate the machine carefully and cautiously;
Maintain the machine regularly according to the instructions presented
in this manual;
Use spare parts from the same manufacturer or of the same class if you
need repair.
1.2 Safety guidance
Damage might be caused to yourself, other people, the machine or other
properties if you intend to operate the machine without reading this manual.
Operators of this machine must be trained before getting started.
In order to prevent fire, the machine can only be used to clean non-
explosion-proof commercial ground.
Do NOT use the machine if it is incomplete or not well assembled,
because it would cause damage to yourself, other people, the machine or
other properties.
Repair of the machine must be carried out by specialized personnel, and
the machine must be powered-off before any repair to prevent the failure
from expanding.
1.3 Instructions for operating the machine
When connecting the battery, special attention must be paid to its
polarities; wrong connection is strictly forbidden, because the machine is
powered by dirent current,and wrong connection would cause damage to
every electronic part of the machine!!!
Batteries of different brands and specifications have their matched
chargers; using unmatched chargers might cause damage to the battery

and even lead to explosion in extreme cases.
Short circuit may be produced if the electrical components of the
machine are exposed to water or moisture.
Do NOT put any objects on the battery.
Do NOT let any water enter into the inlet of the suction motor when
washing the machine.
Damage may be caused if you do not pay attention to the labels on the
machine and this manual. Read them carefully before operating the
machine.
The machine must NOT advance in a rough ground or slope. Do NOT
sit on the machine and keep your hands, feet and loose clothing away
from any moving part.
Be careful when the machine is moving along the edge (of a wall), and
pay attention to the space between its anti-collision wheel and the wall;
do NOT push the machine over tiny obstacles.
The use of water or detergent will wet the ground and may be prone to
slippery. Put warning signs around during the work.
1.4 Instructions for safety
Since the machine is very heavy, special attention should be paid during
transportation; if you need to transport the machine, the battery must be
taken out first, and lift the metal frame at the bottom of the machine. Do
NOT put your focus on the plastic water tank so as to avoid damage.
Do NOT operate or store the machine (as well as the battery) in places
with explosive gas or liquid.
1.5 Safety requirements for batteries
The battery must NOT be in a low voltage state; charge the battery as
soon as possible when the voltage is below 21 V;
To avoid electric leakage, keep the battery dry and clean;
Do NOT put metallic objects (such as tools) on the battery to prevent it
from being short-circuited and burned;
The charging room should be well ventilated;
When the key switch is in the ON position, do NOT install or remove
the battery;
Before installing or removing the battery, disconnect first the negative
wire (-) and then the positive wire (+). When rewiring, pay special
attention to the polarity of the battery, as wrong connection would likely
damage electrical components inside the battery;
Avoid direct contact between the positive and the negative electrodes,
because it would cause a large current short circuit, high heat or even a
fire.
Attention: disconnect the battery connecting cable if the machine is not about
to be used for a long time or is going to be repaired.

Chapter I I
Routine Maintenance and
Replacement of Wearing Parts
3.1 Preparation
Choose the most suitable detergent and the appropriate concentration of
detergent according to the state of the ground. In general, only two
disposable cups of detergent are needed. Reduce the amount of detergent
used to protect the environment and use neutral low-foaming detergent.
Use defoamer at the same time in order to eliminate foam in the water
tank and extend the service life of the water suction motor.
Add detergent from the front water filling port, then fill the clean water
tank with clean water.
If you want to get water from the tap with a hose, you can plug the hose
directly into the water hole on the side of the machine. However, pay
attention to the water level to prevent an overflow of the detergent.
3.2 Before the work
In the area that needs cleaning, first sweep the floor to eliminate large
sundries and dust, and make sure that the ground is free of mud, stone
pieses and paper scraps. This will boost your work efficiency and help
you protect the machine.
Turn on the general swtich, check the battery level and make sure that it
has sufficient power before starting the work.
3.3 During the work
The batteries must be charged in the case of low power!
Turn the forward/backward switch to the forward gear, start the brush
plate motor, water suction motor and switch button in sequence and use
the water volume adjusting handle to control the flow of clean water.
On the uneven ground, there might still be water after cleaning. In this
case, you can raise the brush plate, start the water suction motor, push
the machine and absorb water in the water area. Note that the water
suction efficiency will be affected if there are deep grooves on the
ground, and this problem can only be dealt with separately.
Problems that you may encounter when adjusting the squeegee:
When using the machine, if you feel that the water suction motor is abnormal
and the squeegee cannot absorb water or the sound of the squeegee is
abnormal, stop the work immediately to carry out an inspection.
1. If the water level has risen to the highest position, the float ball rises and
the air passage is cut off, please remove the sewage tank, open its cover,
discharge the sewage, and wash the sewage tank.
2. If the water level in the sewage tank is not high and there is no excessive
foam, it is very likely that the joint between the squeegee and the pipe is
blocked, and it will return to normal after being cleaned.
3. If the water level in the water tank is not high but there are too much
foam, it is likely that you have added too much detergent or you have
used high-foaming detergent. In this case, add an appropriate amount of
defoamer to the sewage tank.
4. If the three solutions above do not work, unplug the suction pipe on the
squeegee, start the water suction motor and check by hand whether the
suction at the air inlet is normal. If the suction force is too small, check
whether the squeegee connecting pipe is blocked.
3.4 Replacing the brush plate
Put the brush plate to be installed under the brush plate cover (in the case
of a needle plate, add the scouring pad first). Put down the brush plate
and align the plate head with the bayonet.
Turn on the switch button of the brush plate motor, and the brush plate
will be automatically installed with the rotation of the motor. The brush
plate can also be manually installed or removed.
For unexperienced users, it is recommended to install or remove the
brush plate manually: raise the brush plate first after finishing the work,
turn off the brush plate switch, the brush plate motor will be stopped and
you can remove the brush plate by rotating it.
3.5 Replacing the batteries
Turn off all the switch buttons.
Open the buckle of the batteries, disconnect the battery cable and
remove the batteries separately.
3.6 Maintenance and replacement of the squeegee
The squeegee is an important part of the machine, and it will be worn due to
friction with the ground. When the water absorption efficiency is low, check:
If there is any debris in the plastic scrapper;

Note: the following cases are NOT covered in the warranty:
Failure to perform maintenance in accordance with the maintenance
manual, resulting in mechanical damage or failure.
The mechanical appearance or structure is obviously damaged due to
improper operation.
Disassembly or modification not approved by the original
manufacturer.
Damage due to weather or force majeure.
More than 1 year of warranty or more than 1500 hours of use.
If the joint between the squeegee and the hose is blocked;
The wearing state of the adhesive tape (replace the tape if it is seriously
worn);
If you use the machine in a heavily oil-polluted environment, please
purchase special oil-resistant adhesive tapes.
3.7 After the work
Wipe the machine with a dry rag; discharge the sewage and clean the
sewage tank.
Lift the brush plate and squeegee; put the machine in a dry, well
ventilated and flat ground with no flammable gas, liquid, chemicals or
open flame.
If it is not used for a long time, in order to protect the batteries, it is
necessary to disconnect the battery cable and cover the machine with a
dustproof cloth.

User manual for Compact
Walk-behind Floor Scrubber
RT-15
September 14th, 2023

Contents
Display content on the control panel screen...............................................................................3
Error Codes....................................................................................................................................5
Advanced Features........................................................................................................................6

Display content on the control panel screen
1. Startup Screen:
When the floor scrubber is powered on, the display screen will initially show the startup
screen. The first line of the startup screen displays "SUNMAX", and the second line displays
"Automatic System".
2. Working Screen:
After powering on the floor scrubber, the default settings are as follows:
➔Brush motor is off.
➔Water valve is closed (displayed as "0").
➔Dirty water suction motor is off.
➔Timer displays as "T0000".
➔Battery voltage is displayed as "Power 24.4V.
3. Detailed Explanation of Display Screen Items:
★0/1 - Water spray status indicator
"0" indicates that the water valve is closed, while "1" indicates that the water valve is open. The

floor scrubber activates the water spray function by pressing the water button, and the display
screen shows the number "1" as a prompt. Pressing the water button again will deactivate the
water spray function, and the display screen will show the number "0" as a prompt.
★Power xx. xV: Indicates the battery voltage level.
When the voltage falls below the configured battery threshold voltage (21.6V for lead-acid
batteries, 23.5V for lithium batteries), it will display "Low Battery" on the screen and
simultaneously deactivate the dirty water suction motor, brush motor, and drive function.
★Vacuum: Vacuum function indicator
Press the vacuum button to activate the vacuum function on the floor scrubber, and the display
screen will show the "Vacuum" indicator. Press the vacuum button again to deactivate the
vacuum function, the "Vacuum" indicator will disappear from the screen.

★Brush: Brush function indicator
Press the brush button to activate the brush function on the floor scrubber, and the display
screen will show the "Brush" indicator. Press the brush button again to deactivate the brush
function, the "Brush" indicator will disappear from the screen.
Error Codes
1. Low Battery: The battery voltage is low; please recharge as soon as possible.
2. Brush error: Brush motor overcurrent; please check the brush motor mechanism and the
floor surface.

3. Vacuum error: suction motor overcurrent; please check the dirty water suction mechanism
and the floor surface.
Advanced Features
1. Timer Reset
The floor scrubber keeps track of the time when the dirty water suction, brush motor, or
water valve motors are in operation. After accumulating 9999 minutes of operation, you can
reset the timer by simultaneously pressing and holding the "Suction" and "Brush" buttons for
3 seconds.
2. Setting Battery Threshold Voltage
The floor scrubber supports lead-acid and lithium-ion batteries, with a default threshold
voltage of 21.6V for lead-acid batteries and 23.5V for lithium-ion batteries. After turning on
the machine, you can switch the battery threshold voltage by pressing and holding the
"Water" and "Brush" buttons together for 3 seconds.

Note:
The battery threshold switching function can only be performed once after turning on the
key switch; if you need to switch it a second time, you must repeat the power-on operation.