MANUAL - Tyrolit · HTC Sweden AB Box 69 SE-614 22 Söderköping - Sweden Tel: +46 (0) 121-294 00 Fax: +46 (0) 121-152 12 You can find addresses for our retailers and service partners

MANUALHTC 420 VS

GB

Contact InformationHTC Sweden ABBox 69SE-614 22 Söderköping - SwedenTel: +46 (0) 121-294 00Fax: +46 (0) 121-152 12

You can find addresses for our retailers and service partners on ourwebsite:www.htc-sweden.com

Always specify the model and serial number when asking questionsabout your product.

TrademarksHTC is a trademark owned by HTC Sweden AB. Other names andproducts mentioned in this manual may be registered trademarksowned by the relevant companies.

© 2007 HTC Sweden AB. All rights reserved.

Declaration of conformityIn accordance with EMC 2004/108/EC, LVD 2006/95/EC, MD2006/42/EC

Type of equipment GrinderMake HTCTrademark HTC 420 VSManufacturer HTC Sweden AB

Box 69614 22 Söderköping

The product was CE marked in 2004.

As the manufacturer, we hereby declare under sole responsibilitythat the product conforms with the terms of the directives listedabove.

Sten Jeansson, CEO

HTC 420 VS Table of contents

Table of contents

1. Introduction.........................................................11.1 General......................................................................... 11.2 Liability.......................................................................... 11.3 Manual.......................................................................... 1

1.3.1 Safety instructions – explanation of symbols........11.4 Transportation............................................................... 21.5 On delivery....................................................................21.6 Unpacking the machine................................................31.7 Machine name plate..................................................... 31.8 Handling and storage................................................... 31.9 Vibrations and noise..................................................... 3

2. Safety...................................................................42.1 General......................................................................... 42.2 Warnings....................................................................... 42.3 Observations.................................................................5

3. Machine description.......................................... 73.1 General machine description........................................73.2 Description of controls – Control panel........................ 9

4. Operation...........................................................114.1 General....................................................................... 114.2 Handle settings........................................................... 134.3 Access to grinding tools............................................. 134.4 Fitting and replacing grinding tools.............................14

4.4.1 Fitting grinding tools........................................... 144.4.2 Changing grinding tools......................................15

4.5 Preparations for dry grinding...................................... 164.6 Preparations for wet grinding..................................... 174.7 Control........................................................................ 18

4.7.1 Standby ............................................................. 184.7.2 Emergency stop switch...................................... 184.7.3 Starting the machine.......................................... 184.7.4 Overload............................................................. 19

4.8 Making operation easier............................................. 20

Table of contents HTC 420 VS

5. Maintenance and repairs.................................215.1 General....................................................................... 215.2 Cleaning......................................................................215.3 Daily............................................................................ 215.4 Every week................................................................. 215.5 Every month (or 100 hours)....................................... 225.6 Repairs........................................................................22

6. Troubleshooting............................................... 236.1 General ......................................................................23

6.1.1 The machine will not start.................................. 236.1.2 The machine vibrates or wears the toolunevenly.......................................................................236.1.3 The machine is grinding unevenly......................236.1.4 The machine stops immediately afterstarting......................................................................... 246.1.5 The fuses trip frequently.....................................246.1.6 The machine cannot cope..................................24

7. Electronic error codes.....................................257.1 General....................................................................... 257.2 Resetting the frequency converter..............................277.3 Checking the last error code...................................... 27

8. Spare parts....................................................... 288.1 Chassis....................................................................... 288.2 Handle.........................................................................308.3 Grinding head 1..........................................................328.4 Grinding head 2..........................................................348.5 Grinding holder........................................................... 36

9. Technical data.................................................. 38

10. Environment................................................... 40

11. Warranty and CE Marking............................. 4111.1 Warranty ...................................................................4111.2 CE marking............................................................... 41

HTC 420 VS Introduction

2.0 1

1. Introduction

1.1. GeneralHTC 420 VS is a grinder that can be used to grind, strip, clean andpolish concrete, unhewn stone and terrazzo floors. The areas ofapplication for the machine depend on the choice of tool.

Read through this manual carefully so that you know how to useand maintain the machine before using it. Contact your retailer formore information. For contact information, see Contact Informationat the start of the manual.

1.2. LiabilityAlthough every effort has been made to ensure that the informationin this manual is correct and complete, we accept no responsibilityfor errors or omissions. HTC reserves the right to change thedescriptions contained in this manual without prior notice.

This manual is protected by copyright law and no part of it may becopied or used in any way without the written approval of HTC.

1.3. ManualIn addition to general functions, this manual deals with areas ofapplication and maintenance of the grinder.

1.3.1. Safety instructions – explanation of symbolsIn order to clearly mark particularly important sections, there area number of symbols in the manual – see below. In order to avoidboth personal injury and material damage as much as possible, it isextremely important to read and understand the text next to thesesymbols particularly carefully. Practical tips are also marked with asymbol. These tips are to make it easier to use the machine and toget maximum benefit from it.

The following symbols are used in the document to highlight forthe reader when to be observant.

This symbol means Warning! and indicates a risk of personalinjury or material damage in the event of incorrect use of themachine or associated equipment. If you see this symbol next to

Introduction HTC 420 VS

2 2.0

a section of text, you must pay particular attention when readingthrough the text and not carry out any operations of which you areunsure. This is for your own and other users’ safety and to avoiddamage to machinery or other equipment.

This symbol means Note! and indicates a potential risk of materialdamage in the event of incorrect use of the machine or associatedequipment. If you see this symbol next to a section of text, youmust pay particular attention when reading through the text and notcarry out any operations of which you are unsure. This is to avoiddamage to the machinery or other equipment.

This symbol means Tip! You can get tips and advice on waysto make operating your machine or associated equipment easier,and to avoid wear. If you see this symbol next to a section of text,you should read through the text to make your work easier and toextend the service life of the machine.

1.4. TransportationThe machine is best transported secured to a load pallet.

1.5. On deliveryThe following items are included on delivery. Contact your retailerif anything is missing.

• Grinder

• Manual

• Locking key for control cabinet

• Hammer EZ system

• Splash guard

• Electrical cable with contact

• EZ Grinding holders

• Upper belt (spare part)

HTC 420 VS Introduction

2.0 3

1.6. Unpacking the machineWarning!

Read through the safety instructions and the manual carefullybefore use.

• Check carefully to see if the packaging or machine hasbeen damaged during delivery. If there are signs of damage,contact your retailer and report the damage. Report anyexternal damage to the transport company as well.

• Check that the delivery matches your order. If you have anyquestions, contact your retailer.

1.7. Machine name plateThe model number and serial number are shown on the machinename plate. This information is required when ordering spare partsfor the machine. Use the space below to make a note of the modelnumber and serial number for future reference.

MODEL NUMBER _________________________________

SERIAL NUMBER__________________________________

1.8. Handling and storageThe machine should be stored in a heated, dry area when not in use.Otherwise the machine may be damaged by condensation and cold.

1.9. Vibrations and noiseWarning!

Always wear hearing protection when using the machine.

The machine is tested in accordance with ISO 8662-4 and ISO11202 with regard to vibrations and noise. The average valueis 0.65 m/s² for vibrations in connection with acceleration. Theaverage value for the sound level when rough grinding concrete is97dB. This value varies depending on the choice of tool and thetype of floor.

Safety HTC 420 VS

4 2.0

2. Safety

2.1. GeneralThis chapter contains all the warnings and observations that shouldbe taken into consideration for HTC 420 VS.

2.2. WarningsWarning!

The machine may only be operated or repaired by personnel whohave completed the required practical and theoretical trainingand who have read this manual thoroughly.

Warning!

Always use the machine in an environment where there is no riskof explosion and fire. Find out and follow the relevant fire safetyregulations when grinding.

Warning!

Secure the area around the machine. No unauthorised personsshould be within a 15-metre radius of the machine. If loose objectsget under the grinding head, these may be flung out and causepersonal injury.

Warning!

Use safety equipment such as shoes with steel toecaps, goggles,protective gloves, a mask and hearing protection.

Warning!

The machine may only be started with the grinding head lowered.The rotating disc must be touching the floor and the right toolmust be fitted.

HTC 420 VS Safety

2.0 5

Warning!

After grinding, the tools will be very hot. Tip the machine backand allow it to stand for a short while. Use protective gloves whenremoving the tools.

Warning!

When changing tools or making repairs, the power to the machinemust be disconnected.

Warning!

The machine may only be used and moved over flat surfaces.There may be a risk of crushing if the machine begins to roll.

Warning!

The machine must be connected to a residual current device.

Warning!

The machine may only be used when the splash guard is fitted.

2.3. Observations

Note!

The machine may only be used for grinding and polishing unhewnstone, terrazzo, concrete, other materials specified in this manualor material recommended by HTC.

Note!

Only original tools and spare parts from HTC may be used for themachine, otherwise the CE mark and warranty will be invalid.

Safety HTC 420 VS

6 2.0

Note!

The instructions in this manual must be followed in order for theCE mark to be valid.

Note!

The machine may only be lifted using the intended lifting eye.

Note!

The machine is best stored in a warm (above zero), dry area whennot in use.

Note!

If the machine is stored in a cold area (below zero), it must bestored in a warm area (above zero) for at least two hours beforeuse.

Note!

When dry grinding, a suitable dust extractor should be used.Contact HTC for model recommendations.

Note!

After removing glue and wet grinding, always lift up the grindingheads so that they do not stick to the floor and damage machinecomponents and the floor when restarting.

Note!

When wet grinding, the water tank must be filled with water. Onlycold water with no chemical additives may be used.

HTC 420 VS Machine description

2.0 7

3. Machine description

3.1. General machine descriptionThe machine is built around a number of main components - seeFigure 3-1 on page 7 and Figure 3-2 on page 8. It hasthree motor options: 230 V 1-phase (EU), 400 V 3-phase (EU) and115 V 1-phase (US).

The machine is built around a chassis with wheels. The motor witha rotating grinding unit is attached to the bottom of the chassis,so that there is some movement between the chassis and motorpackage.

The handle can be set in a number of different tilt positions. Choosea position that best suits you.

The grinding cover has a connection for an external suction hoseused for dry grinding.

The machine can easily be equipped with a large number of tools,depending on the material to be ground. For the different tools, seeHTC’s Product Catalogue under the Grinding Guide tab.

7

6

5

4

3

1

2

8

9

Figure 3-1 Machine front

1. Suction hose

Machine description HTC 420 VS

8 2.0

2. Wheels3. Splash guard4. Grinding cover5. Lifting handle for grinding head6. Motor7. Lifting eye for machine8. Water tank9. Adjustable handle

4

3

2

1

Figure 3-2 Machine rear

1. Control panel2. Electrical connection3. Extraction connection4. Control cabinet

HTC 420 VS Machine description

2.0 9

3.2. Description of controls – ControlpanelThe picture below shows the machines control panel:

Figure 3-3 Control panel

1. Power - Standby indicator: Indicates that themachines functions have been activated. Litwhen the Power knob (7) is turned to “I”.

2. Overload - Overload indicator: Lights up toindicate that the machine is using too muchpower. If this is ignored, the power supply tothe motor will be interrupted and an error codegenerated.

3. Reset - Resetting the electronics: If themachine experiences an error, it may benecessary to reset it. Turn the Grinding knob(5) to “Reset” to reset all electronics. Theknob automatically returns to the centralposition once it is released. Any error code isshown on the display in the control cabinet.

4. FWD - Forward: Turn the Grinding knob (5)to “FWD” to start the machines grinding discs.

5. Grinding - “Reset” (3) and “FWD” (4) knob.6. Speed - Rotation speed: Regulates the rotation

speed of the machine’s grinding discs.

Machine description HTC 420 VS

10 2.0

7. Power - Start/stop the machines functions:Turn the knob to “I” to activate the machinesfunctions and prepare for start. Turn the knobto “O” to switch off the machines functions.

8. EM-Stop - Emergency stop switch: Press theswitch in an emergency to turn off the powerto the machine.

HTC 420 VS Operation

2.0 11

4. Operation

4.1. GeneralThe following section describes how to change tools and how tooperate the grinder. This section does not deal with the technicalaspects of grinding, such as selection of grinding tools, etc. Forchoice of tools, see HTC’s Product Catalogue under the GrindingGuide tab.

Warning!

The machine may only be operated or repaired by personnel whohave completed the required practical and theoretical trainingand who have read this manual thoroughly.

Warning!

Always use the machine in an environment where there is no riskof explosion and fire. Find out and follow the relevant fire safetyregulations when grinding.

Warning!

Secure the area around the machine. No unauthorised personsshould be within a 15-metre radius of the machine. If loose objectsget under the grinding head, these may be flung out and causepersonal injury.

Warning!


Warning!

The machine may only be started with the grinding head lowered.The rotating disc must be touching the floor and the right toolmust be fitted.

Operation HTC 420 VS

12 2.0

Warning!

The machine may only be used and moved over flat surfaces.There may be a risk of crushing if the machine begins to roll.

Tip!

Check the minimum recommended cable area before using anextension cord. You will find the recommended cable area underTechnical data on page 38.


2.0 13

4.2. Handle settingsThe picture below shows the handle positions on the machine.

1

2

3

Figure 4-1 Handle settings

1. The forward position - used, for instance, fortransportation, as the machine takes up significantly lessspace.

2. Rear position - used for tipping the machine to make toolreplacement easier.

3. Working position - the working height can be adjusted totwo positions using the machine’s adjustable handle.

• Lock the handle in the required position using the lockingmechanism located on the underneath of the handle cover.

4.3. Access to grinding toolsWarning!



14 2.0

Warning!


1. Set the handle to the rear position - see Figure4-1 on page 13.

2. Tip the machine backwards so that it rests against theground.

4.4. Fitting and replacing grinding toolsWarning!


Warning!


4.4.1. Fitting grinding tools1. Slide the grinding tool diagonally from above down into

the appropriate guide slot on the tool holder. Then push thetool fully into the guide slot, see Figure 4-2 on page 14.

Figure 4-2 Fitting grinding tools

2. Lock the grinding tool into the tool holder by givingit a few light taps with a rubber hammer, see Figure4-3 on page 15.


2.0 15

Figure 4-3 Locking grinding tools

4.4.2. Changing grinding tools1. Remove the grinding tool by giving it a few light taps with

a rubber hammer so the locking mechanism releases, seeFigure 4-4 on page 16. Then draw the tool up out of theguide slot.


16 2.0

Figure 4-4 Removing grinding tools

2. Slide the grinding tool diagonally from above down intothe appropriate guide slot on the tool holder - see Figure4-2 on page 14. Then push the tool fully into the guideslot.

3. Lock the grinding tool into the tool holder by givingit a few light taps with a rubber hammer - see Figure4-3 on page 15.

4.5. Preparations for dry grindingWarning!

Check that the splash guard is fitted.

1. Connect a dust extractor to the machine. For dust extractormodels, see under the Suction System tab in the HTCProduct Catalogue.


2.0 17

Note!

The dust extractor can be connected to both sockets found ontheprotective cover for the machine. If you only use one of thesockets, thesocket not in use should be covered. Adjust thecapacity of the dustextractor to match the grinder.

2. Inspect the floor carefully and remove any protrudingobjects, such as reinforcement rods or bolts, and any loosedebris that could get stuck in the machine.

3. Attach the appropriate tool to the machine.

4. Set the handle to the required working position.

4.6. Preparations for wet grindingWarning!

Check that the splash guard is fitted.

1. Always use liquid suction when wet grinding.

Tip!

Never use a dust extractor, as it may cause blockages in the dustextractorssuctionhose.

2. Inspect the floor carefully and remove any objects stickingup, such as reinforcement rods or bolts, and any debris thatcould get caught in the machine.

3. Attach the appropriate tool to the machine.

4. Set the handle to the required working position.

Warning!

Only cold water with no chemical additives may be used.

5. Fill the tank with cold water.


18 2.0

4.7. ControlThe machines functions can be controlled using the control panel -see Figure 3-3 on page 9.

During operation, the operator pushes the grinder forward over thefloor surface.

4.7.1. StandbyIn order to activate the machines functions, turn thePowerknobto“I”.Once the knob set to this position, the Power indicator on thecontrol panel lights up, indicating that the machine is in stand bymode.

4.7.2. Emergency stop switchThe emergency stop switch, (EM-Stop) must only be used in anemergency.

When the switch is pressed, all electrically-operated equipment inthe machine is turned off.

Note!

Do not use the emergency stop switch to stop the machine otherthan in emergencies, as it causes wear to the contactor.

Note!

As long as the emergency stop switch (EM-Stop) is pressed, themachine cannot be started. Reset by turning the switch 45° so thatit pops out again. The machine can then be restarted.

4.7.3. Starting the machineFor a description of the control panel, see Figure 3-3 on page 9.

1. Insert the cord.

2. Make sure the emergency stop switch has not beenactivated.

3. Turn the Power knob to “I” so that the electronics areactivated.

4. Set the speed for the grinding discs using the Speed knob.

5. Turn the Grinding knob to “FWD”.


2.0 19

6. The machine has now started.

4.7.4. OverloadIf the machine is using too much power, the Overload indicator onthe control panel goes off. The machine switches off automaticallyafter a while if this is ignored. Reduce the speed of the grindingdiscs to see if the Overload indicator goes out. If this does not help,follow the procedure for troubleshooting.


20 2.0

4.8. Making operation easierIn order to keep the suction hose for the dust extractor and thepower cable out of the working area and/or path of the machine, thehose and cable can be arranged as shown in the picture below.

Figure 4-5 Making operation easier

Tip!

By arranging the hose and cable as shown in the picture, youavoid disruptive stoppages caused by having to re-position thecable and hose.

HTC 420 VS Maintenance and repairs

2.0 21

5. Maintenance and repairs

5.1. GeneralWe recommend regular inspection of all seals.

Warning!


Warning!


5.2. CleaningWarning!

Do not clean the machine with a high-pressure washer, otherwisemoisture may penetrate electrical elements and damage themachine’s drive system.

• Vacuum the control cabinet, if required.

• Always clean the machine after use with a damp sponge orcloth.

5.3. Daily• Wash the machine if it is used for wet grinding.

• Check for grinding tool wear – abnormal or uneven wearmay indicate a damaged grinding holder.

• Check the tool holder and grinding holder to ensure that nodamage or cracks have arisen. Replace the parts if there isany damage.

5.4. Every week• Wash the machine.

• Check the grinding holders. Remove the tools and runthe machine in the air at the lowest speed. If the grindingholders oscillate or wobble significantly, they are damaged.

Maintenance and repairs HTC 420 VS

22 2.0

• Check that the upper belt is undamaged. Try to turn thelarge disc in one direction. It should be quite stiff. If it turnsfreely, the belt has come off.

Tip!

Recondition all the grinding holders at the same time.

5.5. Every month (or 100 hours)• Tighten anything that may have vibrated loose.

• Remove the grinding cover and check that it is undamaged.

• Check the upper belt. Replace, if necessary.

• Check the seals on the shafts that the upper belt runs on.Replace, if necessary.

• Scrape and vacuum-clean the parts shielded by the grindingcover.

• Test run and listen for any dissonance from the bearings.

5.6. RepairsAny repairs that may be required must be carried out by a HTCService Centre, which has trained service personnel and usesHTC original parts and accessories. Contact your retailer if yourmachine requires servicing. For contact information, see ContactInformation at the start of the manual.

HTC 420 VS Troubleshooting

2.0 23

6. Troubleshooting

6.1. GeneralThis chapter describes all the errors that may occur and how to dealwith them. If the error cannot be dealt with, or if there are othererrors, contact your nearest retailer. See Contact Information at thestart of the manual.

6.1.1. The machine will not start

• Check if the emergency stop switch on the control panel ispressed. Reset the switch by turning it 45°.

• Check if the power connection is correct. Check that thereis full voltage on the motor’s phase/phases. If the phase/phases do not have full voltage, the converter is faulty:

- Reset the electronics by turning the Grindingknob to “Reset”. If this does not help, carryout a reset procedure as follows Resetting thefrequency converter on page 27.

- Check the error code in the converter, see theerror code table in chapter Electronic errorcodes on page 25.

• Check the fuses and contactors in the control cabinet.

6.1.2. The machine vibrates or wears the tool unevenly

• Recondition the grinding holder by changing the sleeve(112332 on page 37).

• Check that the chassis is straight.

• Check that there is movement between the chassis andgrinding head. If necessary, loosen one of the two pins(310374 on page 29) in order to increase the movementbetween the chassis and grinding head.

6.1.3. The machine is grinding unevenly

• Recondition the grinding holder, see under The machinevibrates or wears the tool unevenly on page 23 above.

• Check that the chassis is straight.

Troubleshooting HTC 420 VS

24 2.0

• Check that there is movement between the chassis andgrinding head. If necessary, loosen one of the two pins(310374 on page 29) in order to increase the movementbetween the chassis and grinding head.

6.1.4. The machine stops immediately after starting

• The overload indicator lights up because the speed of thegrinding discs is too high. Reduce the speed and try again.

• Check the error code in the display on the frequencyconverter, see Electronic error codes on page 25.

6.1.5. The fuses trip frequently

• The load is too high on the distribution box to which themachine is connected. Replace the socket or reduce thespeed of the machine.

• Check the tools. Ensure that the correct tools are used, thatthey are in working order and that they are correctly fitted.

6.1.6. The machine cannot cope

• Heavy load. Press the handle down slightly so that thegrinding head eases slightly away from the surface beingground.

• Sticky coating on the surface being ground. Run half of themachine on the surface to be cleaned and half on the cleansurface. This removes any residue from the tools.

• Check the tools. Ensure that the correct tools are used, thatthey are in working order and that they are correctly fitted.

• Voltage drop. Check that the cable area meets HTC’srecommendations.

Tip!

Check the minimum recommended cable area before using anextension cord. You will find the recommended cable area underTechnical data on page 38.

HTC 420 VS Electronic error codes

2.0 25

7. Electronic error codes

7.1. GeneralA common fault on grinders is that the motor is overloaded. Thereare three levels of overloading.

OCF = Rapidly rising current

OHF = Rapidly rising current

OLF = Overload motor

All the error codes that may occur in the frequency converter in thecontrol cabinet are listed below.

Table 7-1:Electronic error codesError code Cause Action

OCF OCF = Rapidly rising currentDue to a high short-term load that is2.5 times the nominal current over acertain period. This usually occursif you run into something or if eitherthe grinding discs or somethingelse inside the machine locks up.May also occur if the motor shortcircuits.

Check mechanical inertia, spin thegrinding discs. Reset the converterif the machine is sluggish. Removethe plug for the motor and start theconverter to see if the fault remains.See also the point below. ContactHTC Service Centre if the faultremains.

OHF OHF = Rapidly rising currentA less severe version of the samefault above. Due to a high short-term load that is 2 times thenominal current over a certainperiod. Usually occurs as a resultof high power consumption over aprolonged period. May also occur athigh temperatures (+ 50° C).

As the fault is related to the abovefault, the action indicated thereshould be carried out. If the surfacebeing worked on is very tough, thismay cause this fault. If the fault istemperature-related, the machinemust be left to cool down beforeit can be started again. Anothersolution is to reduce the speed of thegrinding discs to half speed, as themachine will then use less power.

InF / EEF InF / EEF = Internal faultFault in the frequency converter.

Contact HTC Service Centre.

SCF SCF = Short circuit in the motorDue to a short circuit in the motor orthe motor cable. May also be due toan earth fault.

Check the wiring and, if necessary,the motor isolation. Test byloosening the motor cable andstarting the frequency converter tosee if the error code appears. If thisoccurs, the fault is in the frequencyconverter, otherwise the cable ormotor is broken.

Electronic error codes HTC 420 VS

26 2.0

Error code Cause ActiontnF tnF = Autotuning fault

May arise if the motor has beenreplaced by the wrong motor, whichis outside the norm values for theconverter. May also arise if themotor is broken.

Check the motor. Replace the motorwith an original motor.

OLF OLF = Overload motorOccurs when the motor isoverloaded for a prolonged period.The motor protection in theconverter trips in order to protectthe motor.

Switch off the machine. The motorprotection must cool.Wait 8 minutes before the machineis restarted.

OSF OSF = Over-voltageMains voltage too high ordisturbance in the mains supply.May occur if large motors/machinesare switched on or off in thevicinity. May be due to non-CEmarked equipment.

Measure the supply voltage. Changethe socket. The max. permittedsupply voltage is 240V + 10%.

USF USF = Under-voltageVoltage too low due to large numberof consumers using the network.Temporary drop in voltage. Longand/or weak cables may also causethis fault.

Replace the socket or remove someof the consumers from the network(welding, etc. causes such faults).

ObF ObF = Operating load when stoppedArises if the grinding discs arerunning when the machine is to beswitched off.

Check the power supply to themachine, i.e. the fuses and cable. Ifthe machine still does not functionafter the power supply has beenchecked, the fault may be due to afault on the contactor in the machineor in the control panel. In this case,contact HTC Service Centre.

PHF PHF = Mains supply phase breakPHF flashes in the display for a fewseconds before it goes out. Occurs ifsomeone has pulled out the cord.

Check the power supply to themachine, i.e. the fuses and cable. Ifthe machine still does not functionafter the power supply has beenchecked, the fault may be due to afault on the contactor in the machineor in the control panel. In this case,contact HTC Service Centre.

HTC 420 VS Electronic error codes

2.0 27

Error code Cause ActionOPF OPF = Motor phase break

Occurs when the motor plug hasnot been plugged in correctly or isloose. The fault may also be dueto the plugs or the terminal boxesin the motor being loose. May alsooccur if the machine goes intooverspeed during, for instance, testoperation with the grinding disc inthe air.

Inspect the cable to the motor or theterminal boxes in the motor. Reducethe speed if you are test-operatingthe machine in the air. The faultoccurs if the motor current is aroundapprox. 8% of the converter’snominal current, which is 11 Ampon 2.2 kW single phase.

SLF SLF = Faulty connection of remoteterminal.Occurs if connection to a remoteterminal is faulty. May also be dueto an internal fault.

Restart the computer. If the faultremains, contact HTC ServiceCentre.

7.2. Resetting the frequency converter1. Switch off the machine by turning the Power knob to “O”.

2. Wait until the display switches off.

3. Reset the emergency stop switch.

4. Start the machine by turning the Power knob to “I”.

Tip!

The machine will not start if the Grinding knob is in the “FWD”mode when switching on the power.

7.3. Checking the last error code1. Press and hold ESC until four dashes (----) are shown in the

display.

2. Press ENTER when rdy (ready) is shown. SET is thenshown in the display.

3. Press “arrow down” until SUP is shown in the display.

4. Press ENTER. FrH is shown in the display.

5. Press “arrow down” until LFt is shown in the display.

6. Press ENTER. The last error code is shown.

Spare parts HTC 420 VS

28 2.0

8. Spare parts

8.1. Chassis

1

23

45

67

8

91011

12

13

14

15

1617

18

HTC 420 VS Spare parts

2.0 29

Table 8-1:Chassis spare parts listPos. Description Item number Number

1 Support boss 112167 22 Adapter hose 112168 13 Power unit 420 VS CE 3x400V 112345 13 Power unit 420 VS US 1x115V 112268 13 Power unit 420 VS CE 1x230V 112194 14 Chassis, central section 112156 15 Wheel 583-200-513 grey 110855 26 Circlip SGA 20 310016 27 Pin, fixing lug HTC 420 VS 310374 28 Cotter pin, galv. 2x41 310147 29 Chassis, bottom 112155 110 Attachment tap 112169 111 Tap for grinder 110007 112 Hose connection 2601-12-1/4 110205 213 Screw thermoplastic PT WN 1452 TX 310148 314 Water tank 112151 115 Cover, top 112150 116 Screw MC6S M6x10 8.8 fzb 310005 2017 Screw MFT M6x20 8.8 fzb 310020 618 Handle see

Handle on page 301


30 2.0

8.2. Handle

11 10

12

1314

1516 17

18 1

2

1920

3

4

5

6

7

8

9


2.0 31

Table 8-2:Handle spare parts listPos. Description Item number Number

1 Control plate 112163 12 Handle knob 112164 13 Bracket control panel, part of Power unit 420

VS CE 3x400 V112345 1

3 Bracket control panel, part of Power unit 420VS US 1x115 V

112268 1

3 Bracket control panel, part of Power unit 420VS CE 1x230 V

112194 1

4 Handle 112158 15 Connection plate electricity 112159 16 Controls cover, bottom 112152 17 Wall socket 16 A 346-415V 5P red 110331 18 Screw MC6S M5x20 galv. 310185 49 Screw MFTS M6x16 galv. 8.8 310251 410 Controls cover top 112153 111 Screw MC6S M6x16 8.8 galv. 310082 1812 Cog, lower 112165 213 Screw MFT M6x25 galv. 8.8 310275 614 Hub handle 112166 215 Screw MFT M6x9 10.9 galv. 310115 416 Flexible tubular pin FRP A2 4x12 112231 217 Pressure spring handle 112171 218 Control shaft 112162 219 Cog lock, upper 112161 120 Support handle mechanism 112160 2


32 2.0

8.3. Grinding head 1

17

18

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16


2.0 33

Table 8-3:Grinding head 1 spare parts listPos. Description Item number Number

1 Extraction grinding cover 111578 22 Hose coarse reinforced PVC 110130 33 T-pipe 10 mm 110144 14 Cable holder (clip) JR12 110059 25 Hose Polyurethane tube 10/7 black 110145 1.1 metres6 Pop rivet 4.8x12 310084 67 Sleeve 10474 28 Screw MC6S M8x20 12.9 galv. 310161 49 Fixing lug 110660 210 Screw MFT M6x20 8.8 galv. 310020 611 Divisible plate HTC 420 VS 110658 112 Lifting handle 420 VS 110844 213 Splash guard width 100 mm 112419 114 Cover HTC 420 VS 112725 115 Washer M6 310012 416 Screw MC6S M6x10 galv. 31005 417 Skruv M6S M12x30 fzb 310128 418 Motor 2.2 kW HTC 420 VS 110722 1


34 2.0

8.4. Grinding head 2

31

32

1

3

4

5

7

8

9

10

11

131415

1617

1819

20

2122

23

24

25

26

30

27

12

28

29

6

2


2.0 35

Table 8-4:Grinding head 2 spare parts listPos. Description Item number Number

1 Screw MC6S M6x20 12.9 galv. 310027 32 Motor plate HTC 420 VS 110682 13 Nilos ring 6012 JV 10472 14 Bearing cover centre HTC 420 VS 110650 15 Ball bearing 6012 2RS1 C3 110026 16 Circlip SGA 60 310018 17 Circlip SGA 18 310117 28 Ball bearing 6003-2RS C3 111064 49 Tension wheel HTC 420 VS 110679 210 Tension wheel shaft 110678 311 Pulley HTC 420 VS 110677 312 Lower cover HTC 420 VS 110650 113 Scres MF6S M12x25 1.25 galv. 310138 1214 Washer TBRSB 8, 4x26x5 310015 615 Screw M6S M10x25 galv. 310114 116 Washer TBRSB 10, 5x28x6 310042 117 Screw MC6S M6x16 8.8 galv. 310082 1518 Fixing boss HTC 420 VS 110657 919 Circlip SGH 42 310277 120 Shaft, centre hub 110671 121 Ball bearing 6004-2RS C3 11065 222 Spacer, centre hub 110675 123 Circlip SGA 20 310016 224 Centre hub 110672 125 Upper belt S-140 HTC 420 VS 10483 126 Edging strip HTC 420 VS 110655 127 Bearing cover centre 110652 128 Upper cover HTC 420 VS 110659 129 Screw MC6S M8X55 galv. 8.8 10482 330 Upper belt S-140 HTC 420 VS 10484 131 Protective cover belt without brush strip 112373 132 Brush strip protective cover 112375 1


36 2.0

8.5. Grinding holder

8

9

10

11

12

1

2

3

4

5

6

7


2.0 37

Table 8-5:Grinding holder spare parts listPos. Description Item number Number

1 Screw MFT 6x10 8.8 galv. 310233 32 Cylindrical rubber sleeve 112332 43 Screw MF6S M10x30 galv. 310146 14 Velcro fastening 112273 15 Grinding holder bottom HTC 420 VS 110656 16 Cross complete HTC 420 VS 111463 17 Washer 112270 18 Screw MC6S M10x35 310301 49 Nordlock washers NL10 310302 410 Lug cardan 112371 411 Grinding holder top HTC 420 VS 110653 112 Screw MFT 6x20 8.8 galv. 310020 6

Technical data HTC 420 VS

38 2.0

9. Technical data

The table below shows the machine’s technical data.

HTC 420 VS(EU 230 V)

HTC 420 VS(EU 3x400 V)

HTC 420 VS(US 115 V)

Motor 2,2 kW 2,2 kW 2,2 kWCurrent 10 A or 16 A 16 A 32 AVoltage 1x230 V 3x400 V 1x115 VWeight approx. 100 kg approx. 100 kg approx. 100 kgGrinding diameter 420 mm 420 mm 420 mmGrinding pressure approx. 65 kg approx. 65 kg approx. 65 kgRPM 300-1350 rpm 300-1350 rpm 400-1100 rpmWater tank 6 L 6 L 6 LGrinding discs 3x160 mm 3x160 mm 3x160 mmRecommended minimum cablearea

2,5 mm² 2,5 mm² 6 mm²

474

805

911

781

1334

119

2

784

Figure 9-1 Height and length of the machine in millimetres

HTC 420 VS Technical data

2.0 39

480

Figure 9-2 Width of the machine in millimetres

Environment HTC 420 VS

40 2.0

10. Environment

HTC’s products consist largely of recyclable metals and plastic.The main materials used are listed below.

Chassis

Frame Steel, electro-galvanised metalWheels Solid rubber wheelsCover ABS plastic

Grinding head

Lower cover AluminiumCover ABS plasticExternal plate and steelcomponents

Electro-galvanised metal

Belts Rubber and polyamideOther components Untreated steel

Electrical system

Cables Copper conductors with PVCcasing

Plastic components can be recycled by sorting under hard plastics.Electronics can be submitted as electronic waste. The dust extractoror its components can, of course, also be returned to HTC SwedenAB.

HTC 420 VS Warranty and CE Marking

2.0 41

11. Warranty and CE Marking

11.1. WarrantyThis warranty only covers manufacturing defects. HTC bearsno responsibility for damage that arises or occurs duringtransportation, unpacking or use. In no case and under nocircumstances shall the manufacturer be held responsible fordamage and defects caused by incorrect use, corrosion or useover and above the prescribed specifications. The manufactureris not responsible for indirect damage or costs under anycircumstances. The manufacturer’s warranty period is 24 monthsfrom commissioning, although no longer than 30 months fromdelivery from the factory. (General delivery terms NL92.)

Local distributors may have special warranty conditions specifiedin their terms of sale, delivery and warranty. If you are unsureregarding warranty terms, please contact your retailer.

11.2. CE markingCE marking of a product guarantees its free movement withinthe EU area in accordance with EU regulations. CE marking alsoguarantees that the product fulfils various directives (the EMCDirective and other possible requirements in so-called directivesfor new procedures) in accordance with these regulations. Thismachine carries the CE mark in accordance with the Low VoltageDirective (LVD), the Machinery Directive and the EMC Directive.The EMC Directive states that electronic equipment must notdisturb its surroundings with electromagnetic radiation and thatit must also be immune to electromagnetic interference in thesurroundings.

This machine is classified for use in environments such as heavyindustry, light industry and homes. See the Manufacturer’sDeclaration of Conformity, which shows that the machine isharmonised with the EMC Directive.

Warranty and CE Marking HTC 420 VS

42 2.0

Documents

MANUAL - Tyrolit · HTC Sweden AB Box 69 SE-614 22 Söderköping - Sweden Tel: +46 (0) 121-294 00 Fax: +46 (0) 121-152 12 You can find addresses for our retailers and service partners