Bersi 250A User manual

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Concrete Grinding Machine
250A Operator’s Manual
Electric Model

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SAFETY INSTRUCTION
General safety precautions
• Do not use the machine without first reading and
understanding the contents of this Operator’s Manual.
Work area safety
Do not use the machine in bad weather, such as dense fog,
rain, strong wind, intense cold, etc.
Keep work area clean and well lit. Cluttered or dark areas
invite accidents.
The machine should not be used in areas where potential for
fire or explosions exist.
Electrical safety
• Never drag the machine by means of the cord and never
pull out the plug by pulling the cord.
• Keep all cables away of water, oil and sharp edges. Make
sure the cable is not pinched in doors, fences or the like.
It can cause the object to become live.
• Check that the cables are intact and in good condition.Use
cable intended for outdoor use.
• Never use the machine if any cable is damaged, but hand it in
to an authorized service workshop for repair.
• The machine should be connected to an earthed outlet
socket.
• Check that the mains voltage corresponds with that stated on
the rating plate on the machine.
• Be on your guard for electrical shocks. Avoid having body
contact with lightning-conductors/metal in the ground.
• To avoid overheating do not use the extension cord while it is
rolled up.
• Ensure the cord is behind you when you start to use the
machine so that the cord will not be damaged.
Personal safety
• Wear personal protective equipment. See instructions
under the heading ”Personal protective equipment”.
• Never use the machine if you are tired, if you have drunk
alcohol, or if you are taking medication that could affect
your vision, your judgement or your co-ordination.
• Never allow anyone else to use the machine without first
ensuring that they have understood the contents of the
operator’s manual.
• All operators shall be trained in the use of the machine.
The owner is responsible for ensuring that the operators
receive training.
• People and animals can distract you causing you to lose
control of the machine. For this reason, always remain
concentrated and focused on the task.
• Be careful as clothing, long hair, and jewellery can get
caught in moving parts.
• Never leave the machine unsupervised with the motor
running.
• Make sure that there is always another person close
at hand when you use the machines, so that you can
call for help if an accident should occur.
• Always ensure you have a safe and stable working
position.

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Operating Dimension
250A Electric Model
Model
250A
Length
740mm
Width
420mm
Height
850mm
Weight
68kg
Note :All dimensions and weight are all for reference only and subject to change at any
time
HOW TO ORDER REPAIR PARTS
To insure product safety and reliability, always use
replacement parts when making repairs to the equipment.
When ordering parts, please specify the MODEL and SERIAL
NUMBER of the machine as given on the NAMEPLATE. In
addition, give part number, description and quantity as listed
on the parts list.
Please note: Due to improvements and changes in the equipment
the illustrations shown may be different from the actual
Machine.

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Operating Instruction
Cup wheels layout
1. 1pc 10inch grinding cup wheel
2. 3pcs 4inch grinding cup wheel
3. 3pcs trapezoid grinding cup wheel
Connect the vacuum cleaner
2’’ vacuum port is reserved to connect the vacuum cleaner. Pay attention to dust during
operation.

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Level and water cooling
Adjustable
Removable shroud for edge grinding
Transport
The machine can be folded to minimize space needed for transport.
Carefully fold the machine forward. Put padding between
the motor and the electric box to prevent damage to the machine

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Start and Stopping
Perform Pre-Start Check
Visually inspect the equipment for wear or damage
Be sure all guards are in place and functional properly,Do not operate unless all guards are in
place and secure
Perform all daily maintenance
Inspect accessories -Be sure the correct accessory is install properly on the machine,mounting
arrangement and its intended use
Inspect work area to determine the presence and location of deck inserts,pipes,columns and
objects producing from the slab surface so that they may be avoided during the grinding
operation.
Plug power supply to the grinder
MAINTENANCE
Faults and trouble shooting
The machine will not run
• Check the power supply and the power cables and
make sure that they are not damaged.
• Check that the emergency stop button is not pressed
by turning it clockwise.
Machine is hard to hold onto
• Not enough diamonds under the machine (if grinding
thick glue or soft floors, too few diamonds under the
Machine will greatly increase the load on grinder and
operator).Usually also accompanied by high current draw by
motor.increase number of diamonds under machine to
reduce load on grinder and operator.
Machine is jumping around
• Rubber shock absorber pads in grinding unit may be
worn out or damaged. Check and change if necessary.
• Diamonds may not be fitted correctly or have different
heights. Check to ensure all diamonds are fitted
Correctly and are the same height.
The machine stops after just a while
• The machine is overloaded and the overload
protection has been released. Reduce load. The
machine will reboot after about a minute when the
motor has cooled off.
The machine stops during start-up
• The electric motor has been overloaded or a phase is
missing. Allow the machine one or two minus to reset
and try again. When this does not help, contact an
authorized service workshop.
Cleaning
A Always pull out the plug from the outlet socket before
cleaning, maintenance or assembly.
Always clean all the equipment at the end of the working
da day
Do not use a high pressure washer to clean the machine.
In order for the machine to always be cooled sufficiently
the cooling air openings must be kept clear and clean.
Rubber shock absorber pads
Check the rubber shock absorbing pads every month.
Replace if necessary.

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Electrical Feed
Check that the cord and extension cord are intact and in
good condition.Never use the machine if the cord is
damaged, hand it in to an authorized service workshop for
repair.
Service