Husqvarna BMG 444 Floor Grinder User Manual

: June 10, 2024
: Husqvarna

Table of Contents

Husqvarna BMG 444 Floor Grinder
Introduction
- Product Overview
- Symbols on the product
Safety
Operation
Maintenance
Troubleshooting
Transportation, storage, and disposal
Technical data
Product dimensions
Declaration of Conformity
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Husqvarna BMG 444 Floor Grinder

Introduction

Product Description
The product is a floor grinder for surfaces of different hardness.

Intended use
The product is used to grind surfaces of materials with different hardness such as natural stone, terrazzo, and concrete. Use the product to grind cover materials such as glue. The product can be used for dry grinding and wet grinding. Do not use the product to grind wood.
The product is used in commercial operations by professional operators.

WARNING:
Do not use the product for other tasks.

Product Overview

Product overview BMG 444 Standard version

Handlebar
Lock lever for handle adjustment
Lock lever for handlebar adjustment
Power cord
Electrical enclosure
Grinding motor
Brush strip
Wheel
Type plate
Dust cover
Locking sleeves for the dust skirt
Water hose connection
Dust extraction port
Lever for the dust skirt
Start button
Stop button
Electrical box
Buffer rubbers
Operator’s manual

Product overview BMG 444 Speed Control version

Handlebar
Lock lever for handle adjustment
Lock lever for handlebar adjustment
Power cord
Electrical enclosure
Type plate
Wheel
Brush strip
Dust skirt
Grinding motor
Lever for the dust skirt
Locking sleeves for the dust skirt
Water hose connection
Dust extraction port
Stop button
Start button
Speed adjustment knob
Switch for direction of rotation for the motor
Overload fault lamp
Cabinet door lock
Buffer rubbers
Operator’s manual

Product overview, control panel with speed adjustment

Stop button
Start button
Speed adjustment knob
Switch for direction of rotation for the motor

Symbols on the product

Warning: This product can be dangerous and cause serious injury or death to the operator or others. Be careful and use the product correctly.
High voltage.
Lifting point on the product.
Read the manual carefully and make sure that you understand the instructions before you use the product.
Use approved respiratory protection.
Use approved hearing protection.
Use approved eye protection.
Use approved protective gloves.
Use approved protective boots.
This product is in compliance with applicable EU directives.

Note:
Other symbols/decals on the product refer to special certification requirements for some markets.

Type plate

Product number
Product weight
Rated power
Rated voltage
Enclosure
Rated current
Frequency
Maximum slope angle
Manufacturer
Scannable code
Production year
Model
Serial number

Product liability
As referred to in the product liability laws, we are not liable for damages that our product causes if:

the product is incorrectly repaired.
the product is repaired with parts that are not from the manufacturer or not approved by the manufacturer.
the product has an accessory that is not from the manufacturer or not approved by the manufacturer.
the product is not repaired at an approved service center or by an approved authority.

Safety

Safety definitions
Warnings, cautions and notes are used to point out specially important parts of the manual.

WARNING: Used if there is a risk of injury or death for the operator or bystanders if the instructions in the manual are not obeyed.
CAUTION: Used if there is a risk of damage to the product, other materials or the adjacent area if the instructions in the manual are not obeyed.
Note: Used to give more information that is necessary in a given situation.

General safety instructions

WARNING:
Read the warning instructions that follow before you use the product.

This product is a dangerous tool if you are not careful or if you use the product incorrectly. This product can cause serious injury or death to the operator or others. Before you use the product, you must read and understand the contents of this operator’s manual.
Save all warnings and instructions.
Comply with all applicable laws and regulations.
The operator and the employer of the operator must know and prevent the risks during operation of the product.
Do not let a person operate the product unless they read and understand the contents of the operator’s manual.
Do not operate the product unless you receive training before use. Make sure that all operators receive training.
Do not let a child operate the product.
Only let approved persons operate the product.
The operator is responsible for accidents that occur to other persons or their property.
Do not use the product if you are tired, ill, or under the influence of alcohol, drugs or medicine.
Always be careful and use your common sense.
This product produces an electromagnetic field during operation. This field can under some circumstances interfere with active or passive medical implants. To decrease the risk of serious injury or death, we recommend persons with medical implants to speak to their physician and the medical implant manufacturer before operating this product.
Keep the product clean. Make sure that you can clearly read signs and decals.
Do not use the product if it is defective.
Do not do modifications to this product.
Do not operate the product if it is possible that other persons have done modifications to the product.

Safety instructions for operation

WARNING:
Read the warning instructions that follow before you use the product.

Use personal protective equipment. Refer to Personal protective equipment on page 7.
Overexposure to vibration can cause circulatory damage or nerve damage to persons with decreased blood circulation. Get medical aid if you have symptoms of overexposure to vibration. These symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes
in skin color or condition. These symptoms usually show in the fingers, hands or wrists.
Do not operate the product without all protective covers installed.
Make sure that you know how to stop the motor quickly in an emergency.
Before you go away from the product, stop the motor and disconnect the power cord. Make sure that there is no risk of accidental start.
Make sure that clothing, long hair and jewelry do not get caught in moving parts
Make sure that you are in a safe and stable position during operation.
Only operate the product on horizontal surfaces.
Do not operate the product unless you can get aid if an accident occurs
Always use approved accessories. Speak to your Husqvarna dealer for more information.
If vibrations occur in the product or the noise level from the product is unusually high, stop the product immediately. Examine the product for damages. Repair damages or let an approved service agent do the repair.
Only start the product with the brush strip attached. The brush strip must seal tightly to the surface, especially during dry surface operations.
Make sure that the brush strip is clean and not damaged. Replace a damaged brush strip.
Connect the product to a dust extractor for removal of the dust.
Do not pull the hose of the dust extractor. The product can fall and cause injury or damage.
Keep the dust extractor on until the motor stops fully.
Make sure that the grinding head does not touch the surface when you start the product.
Only operate the product from behind with your hands on the handlebar.
Make sure that there is no grease or oil on the handles.
Always keep the 2 wheels on the ground during operation.

Personal protective equipment

WARNING:
Read the warning instructions that follow before you use the product.

Always use correct personal protective equipment when you operate the product. The personal protective equipment does not erase the risk of injury. The personal protective equipment decreases the grade of injury if an accident occurs. Let your dealer help you select the right equipment.
Use approved eye protection while you operate the product.
Do not use loose, heavy and not applicable clothing. Use clothes that let you move freely.
Use approved protective gloves that enable a solid hold.
Use rubber protective gloves that prevent skin irritation from wet concrete.
Use an approved protective helmet.
Always use approved hearing protection while you operate the product. Noise for a long period can cause noise-induced hearing loss.
The product makes dust and fumes that contain dangerous chemicals. Use approved breathing protection.
Use boots with steel toe-caps and non-slip soles.
Make sure that you have a first aid kit near.
Sparks can occur when you operate the product. Make sure that you have a fire extinguisher near.

Noise safety

WARNING:
Read the warning instructions that follow before you use the product.

High noise levels and long-term exposure to noise can cause noise-induced hearing loss.
To keep the noise level to a minimum, do maintenance on and operate the product as given in the operator’s manual.
Use approved hearing protection while you operate the product.
Listen for warning signals and voices when you use hearing protection. Remove the hearing protection when the product is stopped, unless hearing protection is necessary for the noise level in the work area.

Work area safety

WARNING:
Read the warning instructions that follow before you use the product.

Do not use the product in fog, rain, strong winds, cold weather, risk of lightning or other bad weather conditions.
Do not use the product in areas where fire or explosions can occur.
Keep children, bystanders and animals away from the work area and at a safe distance from the product.
Make sure that only approved persons are in the work area.
Keep the work area clean and sufficiently illuminated.
Remove objects such as screws, bolts, wires and stones from the work area before you use the product.
Make sure that there are no cables or hoses in the operation direction of the product.
Make sure that there is sufficient airflow in the work area.

Electrical safety

WARNING: There is always a risk of shocks from electrical products. Do not use the product in bad weather conditions. Do not touch lightning conductors and metal objects. Always use the product as given in this operator’s manual to prevent injury.
WARNING: Always use a power supply with RCD (residual-current device). An RCD decreases the risk of electrical shock.
WARNING: High voltage. There are unprotected parts in the power unit. Always disconnect the power plug before you open the door to the electrical box.
CAUTION: The power supply from the product or generator must be sufficient and constant to make sure that the motor operates without problems. Incorrect voltage causes the power consumption and the temperature of the motor to increase until the safety circuit releases. The dimension of the power cord must agree with national and local regulations. The dimension of the mains socket must agree with the amperage for the electrical socket and extension cable of the product.

If the power mains has higher system resistance, short voltage drop can occur when the product is started. This can influence the operation of other products, for example flicker on the lights.

Make sure that the power, fuse and mains voltage are the same as the voltage shown on the rating plate of the product.
Always stop the product before you disconnect the power plug.
Do not use the product if the power cord or power plug is damaged. Hand it in to an approved service center for repair. A damaged power cord can cause serious injury and death.
Use the power cord correctly. Do not use the power cord to move, pull or disconnect the product. Pull the power plug to disconnect the power cord. Do not pull the power cord.
Do not operate the product in water depths where the equipment of the product gets wet. The equipment can become damaged and the product can become live and cause injury.
Do not get more moisture into the product than the water supplied by the water system. Keep the product away from rain. Water that goes into the product increases the risk of electrical shock.
Always disconnect the power cord before you connect or disconnect the connection for the motor cable and the electrical enclosure.

Grounded product instructions

WARNING:
Incorrect connections can result in electrical shock. Speak to an approved electrician if you are not sure if your mains outlet is correctly grounded. Do not do modifications to the power plug from its factory specification. If the power plug or power cord is damaged or must be replaced, speak to your Husqvarna service agent. Obey local regulations and laws.

If you do not fully understand the instructions about the grounded product, speak to an approved electrician.

Use only grounded outdoor extension cables with grounding plugs and grounding outlet that accepts the product power plug. The product has a grounded power cord and power plug. Always connect the product to a grounded mains outlet. This decreases the risk of electrical shock if there is a malfunction. Do not use electrical adapters with the product.

Extension cables

Use only approved extension cables with sufficient length.
The rated value on the extension cable must be the same or higher than given on the rating plate of the product.
Use grounded extension cables.
When you operate the product outdoors, use an extension cable that is applicable for outdoor operation. This decreases the risk of electrical shock.
Keep the connection to the extension cable dry and off the ground.
Keep the extension cable away from heat, oil, sharp edges or moving parts. A damaged cable increases the risk of electrical shock.
Make sure that the extension cable is in good condition and not damaged.
Do not use the extension cable while it is wound up. This can cause the extension cable to become too hot.
Make sure that the extension cable is behind you and the product when you use the product. This prevents damage to the extension cable.

Dust Safety

WARNING:
Read the warning instructions that follow before you use the product.

Operation of the product can cause dust in the air. Dust can cause serious injury and permanent health problems. Silica dust is regulated as harmful by several authorities. These are examples of such health problems:
- The fatal lung diseases chronic bronchitis, silicosis and pulmonary fibrosis
- Cancer
- Birth defects
- Skin inflammation
Use correct equipment to decrease the quantity of dust and fumes in the air and to decrease dust on work equipment, surfaces, clothing and body parts. Examples of controls are dust collection systems and water sprays to bind dust. Decrease dust at the source where possible. Make sure that the equipment is correctly installed and used and that regular maintenance is done.
Use approved respiratory protection. Make sure that respiratory protection is applicable for dangerous materials in the work area.
Make sure that the airflow is sufficient in the work area.
If it is possible, point the exhaust of the product where it cannot cause dust to go into the air.

Safety devices on the product

WARNING:
Read the warning instructions that follow before you use the product.

Do not use a product with defective safety devices.
Do check of the safety devices regularly. If the safety devices are defective, speak to your Husqvarna service agent.

Emergency stop button
The emergency stop button is used to quickly stop the motor.

To do check of the stop button

Turn the stop button clockwise to make sure that the stop button is disengaged.
Start the product. Refer to To stop the product, control panel with speed adjustment.
Push the stop button.
Make sure that the motor stops.
Turn the stop button clockwise to disengage.

Safety instructions for maintenance

Use personal protective equipment. Refer to Personal protective equipment.
Keep all parts in good condition and make sure that all fixtures are correctly tightened.
Do not use a product that is defective. Do the safety checks, maintenance and servicing as given in this manual. All other maintenance work must be done by an approved service agent.
Stop the product when you replace the diamond tools.
Do the maintenance with the motor stopped and the power plug disconnected. Always let the motor become cool before you do maintenance of the product.
Do the maintenance of the product on stable level ground.
Clean the area around the product from oil and dirt. Remove unwanted objects.
Do the maintenance to make sure that the product operates correctly. Refer to the Maintenance schedule.
Set out clear signs to give a warning to bystanders that maintenance work is in progress.
Keep fire extinguishers, medical supplies and an emergency phone near.

Operation

Introduction

WARNING:
Before you operate the product, you must read and understand the safety chapter.

To do before you operate the product

Read the operator’s manual carefully and make sure that you understand the instructions.
Read the operator’s manual for the dust extractor carefully and make sure that you understand the instructions.
Use personal protective equipment. Refer to Personal protective equipment.
Make sure that only approved persons are in the work area.
Do daily maintenance. Refer to the Maintenance schedule.
Make sure that the product is assembled correctly and is not damaged.
Put the product on the work area. Make sure that the surface is level. Make sure that the transportation of the product to and in the work area is done safely and correctly. Refer to Transportation.
Make sure that there are diamond tools on the grinding head and that they are tightly attached.
For dry grinding connect a dust extractor to the product. Refer to To connect a dust extractor.
For wet grinding, connect the water supply. Refer To connecting the water supply.
Connect the product to a power source. Refer to To connect the product to a power source.

Basic working techniques

Make sure that the product always moves to get the best grind result.
Use high speed when you grind on soft floors.
Use low speed when you grind on hard floors.
Do the operation in parallel tracks. Make sure that the hose and the power cord (A) of the dust extractor (B) and the product (C) do not become twisted.

Diamond tools
There are many different types and configurations of diamond tools for the product. Metal-bonded diamond tools are used for removal of material and resin-bonded diamond tools are used to polish surfaces. Select the correct diamond tools for the surface. Speak to your Husqvarna dealer or go to www.husqvarnacp.com for support to select the correct tool.

Wing holder alternatives for diamond tools

Use a Metal bond wing holder to attach metal-bonded diamond tools.
Use a resin wing holder to attach plastic-bonded diamond tools.

Full set and half set of diamond tools
The configuration of the diamond tool segments has an effect on the end quality of the surface. The configuration also has an effect on the operation rate of the product.

Full set of diamond tools: This configuration is applicable for a flat floor finish.
Half set of diamond tools: This configuration is applicable when a flat floor finish is not necessary.

To replace the diamond tools

WARNING: Always disconnect the power plug before you replace the diamond tools, to prevent accidental start.
WARNING: Use protective gloves, the diamond tools can become very hot.
WARNING: Use approved respiratory protection when you replace the diamond tools. The dust below the grinding head is dangerous to your health.
WARNING: Use the dust extractor when you replace the diamond tools. The dust extractor will decrease the dust that can cause health problems.
CAUTION: All diamond tools must always have the same number and type of diamond tool segments. The height of the diamond tool segments must be the same on all diamond tools.

Stop the product and disconnect the power plug. Refer to To stop the product, control panel without speed adjustment.
Adjust the handlebar to an upright position. Refer to To adjust the height of the handle and handlebar.
Hold the handlebar and tilt the product rearward. Tilt the product until the support bracket is on the floor.
CAUTION: Make sure that the power cord and the dust hose do not become damaged when you tilt the product.
CAUTION: Put a piece of cloth or thin wood below the support bracket to prevent damage to the floor.
WARNING: Make sure that the product is in a stable position before you replace the diamond tools.
Remove dust with the vacuum cleaner.
Use a hammer to remove the diamond tools from the tool plate.
Clean the tool plate with the vacuum cleaner.
Attach new diamond tools to the tool plate with a soft hit of the hammer.
Carefully lift the product with the handlebar to the operation position.

To connect a dust extractor

WARNING:
Do not use the dust extractor if the dust extractor hose is damaged. The risk increases that you breathe in dust that is dangerous to your health. Use approved respiratory protection.

Examine the dust extractor hose for damages.
Make sure that the filters in the dust extractor are clean and not damaged.
Connect the dust extractor hose to the connection for dust extractor. Refer to Product Overview BMG 444 Standard version on page 3 for information about where the connection for dust extractor is on your product.

To connect the water supply

CAUTION: Use only clean water to prevent dirt blockage in the water system.
WARNING: Keep all electrical cables and connections away from water.
WARNING: Do not use the dust extractor when wet grinding.

Connect the water hose to the water hose connection on the product.
Start the water flow.

CAUTION:
Do not use a higher water pressure than 30 psi. The water is only to prevent dangerous dust in the air. If water is necessary for your operation, speak to a Husqvarna service agent for more information.

To connect the product to a power source

Connect the power plug of the product to an applicable extension cable.
Connect the extension cable to a mains outlet.

CAUTION:
When the product is connected to a dust extractor, the dust extractor must be connected to a power source suitable for both products.

To adjust the height of the handle and handlebar

WARNING:
Be careful when you adjust the handlebar. Make sure that the handlebar locks into position. The moving parts can cause injury.

During operation set the handlebar height as close as possible to the height of the operator’s hip. During operation the product can pull to the side. The hip of the operator can help to stop this movement to the side.

Pull the lock lever in the direction of the handlebar and hold it in this position.
Adjust the handlebar to an applicable operation height.
Release the lock lever to lock the handlebar position.
Pull the lock lever to release the handle and hold it in this position (A).
Adjust the handle to an applicable operation (B).
Release the lock lever to lock the handle position.

To change the position of the wheels
The wheels can have 2 positions in the frame. The top hole (A) is used during standard grinding and polishing operation. The lowest hole (B) is used for bush hammer tools.

Remove the bolts, the washers and the wheel from the frame.
Install in the opposite sequence in the correct hole in the frame.
Do the same procedure on the opposite side of the product.

Operation speed
If the product is operated on a new surface type, set the speed to 70% initially. When the operator knows the surface type, the speed can be adjusted.

To start the product, control panel without speed adjustment

CAUTION:
Move the product all the time while you operate the product. If you do not move the product, the surface can become rough.

Start the dust extractor.
Connect the dust extractor hose to the product. Refer to To connect a dust extractor on page 11.
Connect the product to a power source. Refer to To connect the product to a power source on page 11.
Stay behind the product and hold the handlebar with your hands.
Tilt the product to lift up the tool plate from the surface. Refer to To tilt the product on page 20
Push the start button (A).

To start the product, control panel with speed adjustment

CAUTION:
Move the product all the time while you operate the product. If you do not move the product, the surface can become rough.

Start the dust extractor.
Connect the dust extractor hose to the product. Refer to To connect a dust extractor on page 11.
Make sure that the electrical enclosure is closed.
Connect the product to a power source. Refer to To connect the product to a power source on page 11.
Stay behind the product and hold the handlebar with your hands.
Turn the stop button clockwise to make sure that the stop button is disengaged. Refer to To stop the product, control panel with speed adjustment on page 14.
Turn the speed adjustment knob counterclockwise. Refer to the Product overview, and control panel with speed adjustment on page 5.
Turn the switch for the direction of rotation for the motor right or left. Refer to the Product overview, control panel with speed adjustment on page 5.
Push the start button. Refer to the Product overview, and control panel with speed adjustment on page 5.
If it is necessary, turn the speed adjustment knob clockwise to increase the operation speed.

To control the operation direction
During operation, the product can pull to the sides. The direction of the pull is related to the direction of rotation of the grinding head and how the product is operated.

Always keep the 2 wheels on the ground during the operation of the product.
Apply the side forces on the handle to steer the product.
Always hold the handle tightly with 2 hands to stay stable and make sure that the product does not move laterally.

To stop the product, the control panel without speed adjustment

CAUTION: Do not lift the grinding head from the surface when you stop the motor. The tool plates rotate for a while after the motor stops. Dust can go into the air and the surface can become damaged.
CAUTION: Do not let the product become stationary until the tool plates stop fully.

Push the stop button (B).
Keep the tool plates against the surface until they stop fully.
Disconnect the power cord.
Stop the dust extractor.

To stop the product, the control panel with speed adjustment

CAUTION: Do not lift the grinding head from the surface when you stop the motor. The tool plates rotate for a while after the motor stops. Dust can go into the air and the surface can become damaged.
CAUTION: Do not let the product become stationary until the tool plates stop fully.

Push the stop button. Refer to Product overview, control panel with speed adjustment on page 5.
Keep the tool plates against the surface until they stop fully.
Disconnect the power cord.
Stop the dust extractor.

Maintenance

Introduction

WARNING:
Before you do maintenance, you must read and understand the safety chapter.

For all servicing and repair work on the product, special training is necessary. We guarantee the availability of professional repairs and servicing. If your dealer is not a service agent, speak to them for information about the nearest service agent.

Maintenance schedule

- = General maintenance done by the operator. The instructions are not given in this operator’s manual.
X = The instructions are given in this operator’s manual.
O = The instructions are not given in this operator’s manual. Let an approved service agent do the maintenance.

General product maintenance| Daily| Weekly| Each 3 months
---|---|---|---
Clean the product.| X| |
Do a check of all safety devices.| X| |
Make sure that nuts and screws are tight.| | |
Do a check of the brush sealing for damages and wear.| | |
Clean the electrical enclosure.| | |
Do a check of the electrical components, the cables and the connections for wear and damages.| | |
Do a check of the hose connections. Do a check of all hoses on the product for damages or leakage.| | |
General product maintenance| Daily| Weekly| Each 3 months
---|---|---|---
Make sure that the dust hoses are not damaged and free of blockage.| | |
Make sure that the dust collector is empty and connected correct- ly.| | |
Do a check of the buffer rubbers for damages and wear.| | |
Do a check of the stop button.| X| |
Do a check of the brush strip.| X| |
Make sure that the power cord and extension cable are in good condition and not damaged.| | |
Do a check of the RCD.| | |
Do a check of the cylinder rubbers of the diamond plates.| | X|
Clean the product with a moist cloth.| | | *

To clean the product

Always clean all the equipment after use. Use a vacuum cleaner.
Do not use a high-pressure washer to clean the product.
Keep the air openings clean and clear to make sure that the product always has a sufficiently cool temperature.
After wet grinding, clean the brush strip with water. Make sure that the remaining mixture of dust and water is fully removed.

WARNING:
Do not use compressed air to clean below the grinding head.

Drive system for grinding head
The drive system for the grinding head is a closed system. If you have problems with the drive system of the grinding head, speak to your Husqvarna service agent.

To do a check of the brush strip

Make sure that the brush strip is not damaged and that it seals tightly against the floor.

To do a check of the cylinder rubbers

Do a check if the diamond plates have too much movement in the cylinder rubbers.
If there is too much movement, tighten the bolt (A) or replace the cylinder rubbers (B).
Install 2 cylinder rubbers to have a more rigid grinding head. Refer to the service manual more information.

To reset the product

Disconnect the power plug.
Wait 5 minutes.
Start the product, refer to To start the product, control panel without speed adjustment on page 13.

Note: If the product does not start, speak to an approved service agent.

Troubleshooting

Problem	Cause	Solution
Too much vibra- tion and/or unusual noises.	The buffer rubbers are worn or
damaged.	Examine the buffer rubbers for damaged parts and too much movement.
The bearing is defective.	Do a check of the bearing on the axle drive shaft

and replace if it is necessary.
Unwanted material deposit on the coupling.| Clean the coupling.
Decreased or

no grinding perform- ance.

| The diamond tools are worn.| Replace the worn parts.
The incorrect type of diamond tools for the surface.| Replace the diamond tools with correct dia- mond tools for the surface.
The product does not start.| The stop button is engaged.| Turn the stop button clockwise to disengage.
The stop button is engaged during first start up.| Disconnect the power cord and wait for 1 minute until all power is out of the product. Connect again the power cord and start product.
A defective component.| Replace the defective component.
Only 1 phase comes into the product.| Do a check of the power supply.
The extension cable is disconnected or dam- aged.| Connect the extension cable or if it is neces- sary, replace the extension cable.
No power supply.| Connect the product to a power outlet.
For 230 V system: Incorrect voltage.| Do a check of the supply voltage. Do a check of the voltage relays. Let an electrician do

a check if there is sufficient voltage on the terminals.

The product stops af- ter a while.| The motor protection switch is in operation because of overload.| Decrease the load.
The motor has a defect.| Do a check of the motor.
The product is not easy to hold on to.| Too small number of diamond tools on grind- ing head.| Use the correct number of diamond tools.
The incorrect type of diamond tools for the surface.
Problem| Cause| Solution
---|---|---
The product makes an irregular scratch pattern.| The diamond tools are incorrectly attached or attached at different heights on the buffer rubbers.| Make sure that all diamond tools are installed correctly and have the same height.
The diamond tools are of mixed types.| Make sure that all segments are the same diamond grit and bond. If the diamond seg- ments are rough, space out the rough dia- mond segments equally. Operate the product on an abrasive surface until all segments have the same height.
The head locks are loose or missing.| Make sure that all head locks are in position and tightened.
The resin tools are mixed or have unwanted contamination.| Make sure that all resins are the same dia- mond grit and bond and that there is no con- tamination. To clean the resin tools, operate them for a short time on a lightly abrasive surface.
The buffer rubbers are worn or damaged.| Do a check on the buffer rubbers for broken sections or too much movement.
There are sudden un- wanted movements in the product.| The buffer rubbers are worn or damaged.| Examine the buffer rubbers for damaged parts and too much movement.
The diamond tools are incorrectly attached or attached at different heights on the buffer rubbers.| Make sure that all diamond tools are installed correctly and that all have the same height.
The internal circuit breaker releases.| ****

Too high a load or not sufficient power sup- ply.

| Do a check of the power supply.
Decrease the grinding pressure, increase the number of diamond tools or increase the bond hardness.
The product stops again when you start it.| Speak to an approved service center.
There is no control voltage.| The stop button is engaged.| Turn the stop button clockwise to disengage.
There is no control voltage.

To read the error codes
For a complete overview of faults and how to resolve them, scan the scannable code on the inverter on the front of the frequency drive.

Read the error codes and refer to Error Code 1.

Note:
If the inverter shows an “INF” fault, reset the product. Refer to To reset the product on page 15.

Error codes 1

Error code	Cause	Solution

ASF

| ****

The difference between the output frequency and the speed feedback is not correct.

| Make sure that the motor is stable.
Add a braking resistor to the motor.
Do a check of the motor, load and product. Make sure that they agree.
Do a check of the mechanical coupling and the cable connection of the encoder.
Do a check of the parameters setting.
SOF| There is no signal from the encoder feed- back.| Do a check of the wiring of the input cable and the detector used.
Do a check of the configuration parameters of the encoder.
Signal on “Pulse input” missing, if the input is used for speed measurement.| Do a check of the cable connection between the encoder and the drive.
Do a check of the encoder.
EEF1| The control card does not operate correctly.| Do a check of the electromagnetic field in the environment.

Stop the product and do a reset of the prod- uct. Go to factory settings.

Do a check of the product, repair if necessa- ry.

EEF2

| ****

The power card does not operate correctly.

OCF

| The values in “SETTINGS” and “MOTOR CONTROL” in the menu on the keypad, are not correct.| Do a check of the values.
The product operates slowly or the load is too high.| Do a check of the of the motor, product and load.
There is a mechanical lock.| Do a check of the mechanism of the motor.
OHF| ****

The drive temperature is too high.

| Check the motor load, the drive ventilation and the ambient temperature. Wait for the drive to cool down before restarting.
OLF| The motor current is too high.| Check the setting of the motor thermal pro- tection, check the motor load. Wait for the motor to cool down before restarting.
OPF1| The drive outpot lost one phase.| Do a check of the connections from the drive to the motor.
OPF2| The motor is not connected to the product.
The power of the motor is too low.
The output contactor is open.
The current of the motor is not stable.
Error code| Cause| Solution
---|---|---
OSF| The supply voltage is too high.| Do a check of the supply voltage.
The mains supply s disturbed.
SCF1| ****

Short circuit or grounding at the output of the product.

There is leakage of ground current at the output if 2 or more motors are connected in parallel.

| Do a check of the cables between the drive to the motor.
SCF3| Go to “DIAGNOSTICS” in the menu on the keypad. Do the diagnostic test.

SCF5

| Reduce the switch frequency of the power supply.
Connect chokes in series with the motor.
SSF| There is a limitation in the switch to torque or current.| Do a check for any mechanical problems.

PHF

| Drive incorrectly supplied or a fuse blown.| Do a check of the power connection and the fuses.
One phase missing.
3-phase ATV320 used on a single-phase supply main.| ****

Use a 3-phase supply main.

Unbalanced load. This protection only oper- ates with the drive on load.
USF| The supply mains is too low.| Do a check of the voltage and the parameters.
There is a dip in the translate voltage.

Transportation, storage, and disposal

Transportation

WARNING:
Be careful during transportation. The product is heavy and can cause injury or damage if it falls or moves during transportation.

The wheels let you move the product for shorter distances. For longer distances, lift the product to move it or put the product on a vehicle.

Make sure that the product is in transport position during transportation. Refer to To set the product in transport position.
Be very careful when you move the product manually or on surfaces with a slope. Small slopes can result in a strong movement that is not possible to brake by hand.
Put some type of protection on the product during transportation. The protection keeps natural elements such as rain and snow away from the product.

To move the product up and down a ramp

WARNING: Be very careful when you move the product up and down ramps with the motor on. The product is heavy and there is a risk of injury if the product falls or moves too quickly.
WARNING: For ramps with a steep slope, always use a winch. Do not stay below or near the product.
WARNING: Do not move the product on steep slopes. Look at the rating plate on the product for information about the maximum slope angle.
To move the product down a ramp, operate the product rearward slowly.
To move the product up a ramp, operate the product forward slowly.
Do not turn the product more than 45° on a ramp.

To move the product manually

WARNING: Wait until all moving parts are stationary before you move the product.
WARNING: Use protective boots with steel toe-cap and non-slip sole.

Disconnect the power plug.
Disconnect the dust extractor hose.
Lock the dust skirt. Refer to To set the product in transport position on page 21
Tilt the product. Refer to To tilt the product on page 20.
Push the product by the handles.

To tilt the product

WARNING:
Use protective boots with steel toe-cap and non-slip sole.

Adjust the handlebar to vertical position. Refer to To adjust the height of the handle and handlebar on page 12.
Hold the handlebar and push down the support frame with one foot to tilt the product rearward.

To lift the product

WARNING: Make sure that the lifting equipment has the correct specification to lift the product safely. The type plate on the product shows the product weight.
WARNING: Do not walk or stay below or near a lifted product. Keep bystanders away from the work area.
WARNING: Do not lift a damaged product. Make sure that the lifting eyes are correctly installed and not damaged.

Attach the lifting equipment at the lifting eyes (A).
Lift the product safely.

To set the product in the transport position

Fold the handlebar. Refer to To adjust the height of the handle and handlebar.
Lift up the dust skirt (A).
Make sure that the dust skirt moves into the sleeves.
Turn the dust skirt counterclockwise to lock it in the transport position (B).

To attach the product to a transportation vehicle
Use the lifting eyes to attach the product to the transportation vehicle.

Attach the tie-down straps in the lifting eyes.
Attach and tighten the tie-down straps to the transportation vehicle.

Storage

CAUTION:
Do not put the product in storage outdoors. Always keep the product indoors.

Keep the product in a dry and frost-free area.
Clean the product and do a complete servicing before you put the product in storage.
Keep the product in a locked area to prevent access for children or persons that are not approved.

Disposal
Symbols on the product or the packaging of the product indicate that this product cannot be handled as domestic waste. It must be submitted to an appropriate recycling station for the recovery of electrical and electronic equipment.

By ensuring that this product is taken care of correctly, you can help to counteract the potential negative impact on the environment and people that can otherwise result through the incorrect waste management of this product. For more detailed information about recycling this product, contact your municipality, your domestic waste service or the shop from where you purchased the product.

Technical data

| BMG 444 1×230V| BMG 444 1×230V SC| BMG 444 1× 110V-50Hz| BMG 444 1×110V-60H

z

| BMG 444 3×400V
---|---|---|---|---|---
Max. motor power, kW| 2.2| 2.2| 2.2| 1.1| 3.0
Electrical consumption, V| 230| 230| 110| 110| 400
Electrical frequency, Hz| 50| 50| 50| 50-60| 50
Electrical connection, A| 15.2| 15.2| 29.5| <15| 6
Diameter diamond disc, mm| 155
Operation width, mm| 444
Operation speed, rpm| 720| 300-720| 720| 720| 720/860
Diameter dust hose connection| 76
Length, mm| 1310
Width, mm| 507
Height, mm| 982
Weight, kg| 120| 127| 121| 121| 128
Noise emissions 1
Sound power level, measured LW (dB(A))| 92
Sound levels 2

Noise emission in the environment is measured as sound power according to EN 60335-2-72. Expected measurement uncertainty 2,5 dB(A).
Sound pressure level according to EN 60335-2-72. Expected measurement uncertainty 4 dB(A).

| BMG 444 1×230V| BMG 444 1×230V SC| BMG 444 1× 110V-50Hz| BMG 444 1×110V-60H

z

| BMG 444 3×400V
---|---|---|---|---|---
Sound pressure level at the opera- tors ear, Lp(dB(A))| 76
Vibration levels handle 3
Handle right, m/s2| 2.5
Handle left, m/s2| 2.5

Noise and vibration declaration statement
These declared values were obtained by laboratory-type testing in accordance with the stated directive or standards and are suitable for comparison with the declared values of other products tested in accordance with the same directive or standards. These declared values are not suitable for use in risk assessments and values measured in individual work places may be higher. The actual exposure values and risk of harm experienced by an individual user are unique and depend upon the way the user works, in what material the product is used, as well as upon the exposure time and the physical condition of the user, and the condition of the product.

Product dimensions

Vibration level according to EN 60335-1 and EN 60335-2-72. Reported data for vibration level has a typical statistical dispersion (standard deviation) of 1 m/s2. The vibration values are valid for manual operation.

A	Length unfolded, mm	1310
B	Width, mm	507
C	Height unfolded, mm	982
D	Length folded, mm	824
E	Height folded, mm	940
F	Height vertical position, mm	1560

Extension cables

Cable length	Cross section
≤ 16 A	≤ 32 A
Calculated at a pre-fuse GG4:	16 amp
> 20m	1.5 mm2
20m > 50m	2.5 mm2
50m > 75m	4 mm2

The cross sections must be re-calculated when other type or dimension pre-fuse are used than is given.

Declaration of Conformity

EU Declaration of Conformity
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel:+46- 36-146500, declare on our sole responsibility that the product: