HTC 800 Classic User manual

HTC 800 Classic
MANUAL
GB
Translation of manual in original language

Contact Information
HTC Sweden AB
Box 69
SE-614 22 Söderköping - Sweden
Tel: [phone]
Fax: [phone]
You can find addresses for our retailers and service partners on our website:
www.htc-floorsystems.com
Always specify the model and serial number when asking questions about your product.
Trademarks
HTC is a trademark owned by HTC Sweden AB. Other names and products mentioned
in this manual may be registered trademarks owned by the relevant companies.
© 2007 HTC Sweden AB. All rights reserved.

EC Declaration of conformity
Manufacturer: HTC Sweden AB
Box 69
SE-614 22 Söderköping
Sweden
[phone]
Type of equipment: Grinding machine
Make: HTC
Model: HTC 800 Classic
Year of manufacture: See machine name plate
Serial number: See machine name plate
As the manufacturer, we hereby declare under our sole responsibility that the above
product with serial numbers from 2004 onward conforms to the applicable regulations
in directives MD 2006/42/EC, EMC 2004/108/EC and LVD 2006/95/EC. The following
standards have been used as a basis: ISO 5349-1:2001, ISO 5349-2:2001, ISO
20643:2005, ISO 3741.
This product was CE-marked in 2004. The technical documentation is available from
the manufacturer.
Original of the EC declaration of conformity (Swedish). Other languages are
translations of the original of the EC declaration of conformity.
Söderköping, 01-01-2010
Peter Lundgren
Development Manager,
HTC Sweden AB
Kåre Kilgren
Product Manager,
HTC Sweden AB

HTC 800 Classic Table of contents
i
1 Introduction 1
1.1 General ............................................................................ 1
1.2 Responsibility .................................................................. 1
1.3 Manual ............................................................................. 1
1.3.1 Safety instructions – Explanation of symbols ..... 1
1.4 Transportation ................................................................. 2
1.5 On delivery ...................................................................... 2
1.6 Unpacking the machine ................................................... 2
1.7 Machine name plate ........................................................ 3
1.8 Handling and storage ...................................................... 3
1.9 Vibration and noise .......................................................... 3
1.9.1 Hand and arm vibrations .................................... 4
1.9.2 Sound pressure level .......................................... 4
2 Safety 5
2.1 General Information ......................................................... 5
2.2 Warnings ......................................................................... 5
2.3 Notes ............................................................................... 6
3 Machine description 8
3.1 General machine description ........................................... 8
3.2 Description of controls – Control panel ........................... 9
4 Usage 11
4.1 General Information ......................................................... 11
4.2 Handle settings ................................................................ 11
4.3 Handling weights ............................................................. 12
4.4 Access to grinding tools .................................................. 13
4.5 Fitting and replacing grinding tools .................................. 14
4.5.1 Fitting grinding tools ........................................... 15
4.5.2 Changing grinding tools ...................................... 16
4.6 Preparations for dry grinding ........................................... 16
4.7 Preparations for wet grinding .......................................... 17
4.8 Operation ......................................................................... 18
4.8.1 Standby .............................................................. 18
4.8.2 Emergency stop switch ...................................... 18
4.8.3 Starting the machine .......................................... 18
4.9 Making operation easier .................................................. 19

Table of contents HTC 800 Classic
ii
5 Maintenance and repairs 20
5.1 General Information ......................................................... 20
5.2 Cleaning .......................................................................... 20
5.3 Daily ................................................................................ 20
5.4 Every week ...................................................................... 20
5.5 Every month (or 100 hours) ............................................. 21
5.6 Repairs ............................................................................ 21
5.7 Spare parts ...................................................................... 21
6 Faultfinding 22
6.1 General Information ......................................................... 22
6.1.1 The machine will not start ................................... 22
6.1.2 The machine vibrates or wears the tool
unevenly ............................................................. 22
6.1.3 The machine is grinding at an angle .................. 22
6.1.4 The machine stops during operation .................. 22
6.1.5 The fuses trip frequently ..................................... 23
6.1.6 The machine cannot cope .................................. 23
7 Electronic error codes 24
7.1 General Information ......................................................... 24
7.2 Hitachi SJ700 .................................................................. 24
7.2.1 Resetting the frequency converter ..................... 25
7.2.2 Checking the last error code .............................. 25
7.3 Omron MX2 ..................................................................... 25
7.3.1 Resetting the frequency converter ..................... 26
7.3.2 Checking the last error code .............................. 26
8 Technical data 27
9 Environment 29
10 Warranty and CE marking 30
10.1 Warranty .......................................................................... 30
10.2 CE marking ...................................................................... 30

HTC 800 Classic Introduction
1.0 1
1 Introduction
1.1 General
HTC 800 Classicis a grinder that can be used to grind, strip, clean and polish concrete,
natural stone and terrazzo floors. The machine's area of application depends on the
choice of tool.
Read the manual carefully, so you are totally familiar with the machine before you start
to use it. Contact your local retailer for further information. For contact information, see
Contact Information at the start of the manual.
1.2 Responsibility
Even though every effort has been made to make this manual as complete and accurate
as possible, we bear no responsibility for incorrect or missing information. HTC
reserves the right to change descriptions in this manual without giving prior notice.
This manual is protected by the Copyright Act and no part of it may be copied or used
in any other way without the written approval of HTC.
1.3 Manual
In addition to the general functions, this manual deals with the areas of application and
the maintenance of the grinder.
1.3.1 Safety instructions – Explanation of symbols
A number of symbols are used in the manual to highlight the most important sections,
see below. In order to avoid both personal injury and material damage as far as possible,
it is extremely important to read and understand the text next to these symbols
particularly carefully. There are other symbols indicating practical tips. These are to
help you use the machine in the easiest and most effective way.
The following symbols are used in the document to indicate where special attention is
needed.
Warning!
This symbol means Warning! and indicates that incorrect use can result in
material damage to the machine or accessories. If you see this symbol next to a
section of text, you must be particularly careful when reading through the text
and not carry out any stages of which you are unsure. This is to protect you and
other users and to avoid damaging the machine or other equipment.

Introduction HTC 800 Classic
2 1.0
Note!
This symbol means Note! and indicates that material damage can occur if the
machine or its accessories are used incorrectly. If you see this symbol next to a
section of text, you must be particularly careful when reading through the text
and not carry out any stages of which you are unsure. This is to avoid damage
to the machine or other equipment.
Tip!
This symbol means Tip!and indicates that you can get tips and advice on ways
to make operating your machine or associated equipment easier, and to avoid
wear. When you see this symbol you should read the accompanying text to
facilitate your work and increase the service life of the machine.
1.4 Transportation
The machine is best transported securely fastened to a pallet.
1.5 On delivery
The following items are included in the delivery. Contact you retailer if anything is
missing.
• Grinding machine
• Manual
• Locking key for control cabinet
• Hammer EZ system
• Splash guard
1.6 Unpacking the machine
Warning!
Read through the safety instructions and the manual carefully before use.
• Check carefully to see if the packaging or machine has been damaged during
delivery. If there is any sign of damage, contact your retailer and report it. Report
packaging damage to the transport company as well.
• Check that the delivery matches the order. If there are any discrepancies, contact
your retailer.

HTC 800 Classic Introduction
1.0 3
1.7 Machine name plate
The machine name plate provides the following information. The model and serial
number must be specified when ordering spare parts for the machine.
Figure 1-1. Machine name plate
1. Model
2. Model number
3. Serial number
4. Year of manufacture
5. Power (kW)
6. Voltage (V)
7. Current (A)
8. Frequency (Hz)
9. Rotational speed (r.p.m.)
10. Weight (kg)
11. Address field
1.8 Handling and storage
The machine should be stored in a dry, warm location when not in use. Otherwise it may
become damaged by condensation and coldness.
1.9 Vibration and noise
Warning!
Always use ear muffs when using the machine.

Introduction HTC 800 Classic
4 1.0
1.9.1 Hand and arm vibrations
Hand and arm weighted vibration level [m/s²] for HTC 800 Classic have been measured
with equipment approved according to ISO 5349-1:2001. The measurement uncertainty
for the measurement apparatus has been measured as +/- 2%.
The machine has been tested in accordance with ISO 5349-2:2001 and ISO 20643:2005
in order to identify the operations that contribute to the most frequent vibration
exposures. At vibration levels > 2.5 m/s², the exposure time should be limited in
accordance with the table below. For vibration levels > 5 m/s², immediate measures
should be taken by the employer to ensure that the exposure time does not exceed the
time specified in the table below.
Identified work conditions Measured values [m/s²] Daily permitted exposure
(number of hours)
Grinding/polishing 2,82 unlimited
Floor preparation (T-rex) 3,51 16,2
1.9.2 Sound pressure level
This machine has been tested for noise in accordance with ISO 3741. For information
on sound pressure levels, see the table in chapter Technical data, page 27.

HTC 800 Classic Safety
1.0 5
2 Safety
2.1 General Information
This chapter contains all the warnings and notes that should be considered for HTC 800
Classic.
2.2 Warnings
Warning!
The machine may only be used or repaired by personnel who have received the
requisite theoretical and practical training and who have read the user manual.
Warning!
Never use the machine in an environment with a risk of explosion or fire.
Familiarise yourself with the fire-protection instructions for the working area
and follow them.
Warning!
Secure the area around the working area. No unauthorised persons should be
allowed within a 15-metre radius of the machine. If a loose object were to catch
under the grinding head, this could be flung out and cause personal injury.
Warning!
Use protective equipment such as safety shoes, safety goggles, protective
gloves, breathing mask and ear muffs.
Warning!
The machine must only be started with the grinding head down. The rotating
disc must be touching the floor and the correct tool must be fitted.
Warning!
Read through the safety instructions and the manual carefully before use.
Warning!
Always use ear muffs when using the machine.
Warning!
During grinding, the tools become very hot. Tip the machine back and allow it
to stand for a short while. Use protective gloves when removing the tools.

Safety HTC 800 Classic
6 1.0
Warning!
Always remove the weights before changing tools, to prevent the machine from
tipping back.
Warning!
There is a risk of crush injuries when handling the weights, as these are heavy.
Therefore, the weights should always be handled with great care.
Warning!
Disconnect the electrical supply, when changing tools or repairing the machine.
Warning!
The machine must only be used and moved on level surfaces. There is a risk of
crushing if the machine starts to roll.
Warning!
Connect the machine to an earth fault breaker.
Warning!
Do not clean the machine using a high-pressure washer. Otherwise moisture
may penetrate electrical elements and damage the machine’s drive system.
Warning!
The machine may only be used when the splash guard is fitted.
2.3 Notes
Note!
The machine may only be used to grind and polish natural stone, terrazzo,
concrete, or other materials stated in this manual or that are approved by HTC.
Note!
Only original tools and spare parts from HTC may be used for the machine.
Otherwise neither the CE marking nor the warranty will be valid.
Note!
For the CE marking to be valid, the instructions in this manual must be
followed.
Note!
The machine should be stored in a dry, warm (plus degrees) location when not
in use.

HTC 800 Classic Safety
1.0 7
Note!
If the machine is stored in a cold (minus degrees) location, it must be placed in
a warm (plus degrees) location for at least two hours before use.
Note!
The appropriated dust extractor must be used when dry grinding. Contact HTC
for model recommendation.
Note!
The dust extractor's suction hose must be connected to the appropriate socket
on the machine. Adjust the dust extractor to match the grinder's capacity.
Note!
Do not use the emergency stop switch to stop the machine, except in
emergencies.
Note!
As long as the emergency stop switch is pressed in, the machine cannot be
started. Reset by turning the switch 45° clockwise so that it pops out again. The
machine can then be restarted.
Note!
After removing glue and wet grinding, always lift up the grinding heads so that
they do not stick to the floor and damage machine components and the floor
when restarting.
Note!
When wet grinding, the water tank must be filled with water. Only use cold
water with no chemical additives.

Machine description HTC 800 Classic
8 1.0
3 Machine description
3.1 General machine description
HTC 800 Classic is designed for the grinding of large spaces. It is used to grind, coarse
grind, prepare and polish concrete, natural stone and terrazzo floors or other materials
specified in this manual or material recommended by HTC. The machine is a perfect
choice for removing coverings and for grinding concrete floors according to the HTC
Superfloor method, which is an environmentally-friendly method for grinding and
polishing concrete floors.
The machine is constructed from a number of main components, see Figure 3-1, page
8and Figure 3-2, page 9. It can be combined with weights for adjusting the
grinding pressure, which makes the machine perfect for those with high demands for
flexibility.
The handle can be set at several different angles, select a position that suits you best.
The grinding cover has a connection for an external suction hose used 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, see HTC’s Product Catalogue under the
Grinding Guide tab.
Figure 3-1. The front of the machine

HTC 800 Classic Machine description
1.0 9
1. Electrical connection
2. Tap for wet grinding
3. Wheels
4. Splash guard
5. Grinding cover
6. Weights
7. Motor
8. Lifting frame
9. Water tank
Figure 3-2. The machine's rear
1. Handle lock
2. Filter
3. Control cabinet
4. Handle
5. Control panel
3.2 Description of controls – Control panel
The picture below shows the machine's control panel:

Machine description HTC 800 Classic
10 1.0
Figure 3-3. Control panel
1. EM-STOP - Emergency stop switch: Press the switch in an emergency to cut
the power to the machine.
2. SPEED - Rotation speed: Regulates the rotational speed of the machine’s
grinding discs.
3. ON/OFF - Start/stop the machine's functions: Turn the knob to "ON", to
activate the machine's functions and to prepare for starting. Turn the knob to
"OFF", to switch off the machine's functions.
4. REW/FWD - Start/stop the grinding discs' rotation and direction of rotation.
Turn the knob to "0", to stop the rotation.
5. RESET - Resetting the electronics: If the machine experiences an error, it can
be reset by pressing and holding the button in for two seconds. Any error code
is shown on the frequency converter's display inside the electrical cabinet, see
Figure 3-2, page 9. For error codes, see Electronic error codes, page
24.
6. DUTY- Standby indicator: Indicates that the machine's functions have been
activated. Lights when the ON/OFF knob is turned to "ON".

HTC 800 Classic Usage
1.0 11
4 Usage
4.1 General Information
The following section describes how to change tools and how to operate the grinding
machine. This section does not deal with the technical aspects of grinding, such as
selection of grinding tools, etc. For choice of tools, see HTC’s Product Catalogue under
the Grinding Guide tab.
Warning!
The machine may only be used or repaired by personnel who have received the
requisite theoretical and practical training and who have read the user manual.
Warning!
Never use the machine in an environment with a risk of explosion or fire.
Familiarise yourself with the fire-protection instructions for the working area
and follow them.
Warning!
Secure the area around the working area. No unauthorised persons should be
allowed within a 15-metre radius of the machine. If a loose object were to catch
under the grinding head, this could be flung out and cause personal injury.
Warning!
Use protective equipment such as safety shoes, safety goggles, protective
gloves, breathing mask and ear muffs.
Warning!
The machine must only be started with the grinding head down. The rotating
disc must be touching the floor and the correct tool must be fitted.
Warning!
The machine must only be used and moved on level surfaces. There is a risk of
crushing if the machine starts to roll.
Tip!
Check the minimum recommended cable area before using an extension cord.
You will find the recommended cable area under Technical data, page 27.
4.2 Handle settings
The appropriate working height is set with the help of the adjustable handle. Release the
handle, by pulling the locking pin on the handle lock, see Figure 3-2, page 9.

Usage HTC 800 Classic
12 1.0
Adjust the handle to the desired position and secure it, by inserting the locking pin
again.
Figure 4-1. Handle settings
1. The forward position - used, for instance, for transportation, as the machine takes
up significantly less space.
2. Rear position - used for tipping the machine to make tool replacement easier.
3. Working position - the working height can be adjusted to two positions using the
machine’s adjustable handle.
4.3 Handling weights
The machine can be equipped with three weights to make it easy to change the
machine's grinding pressure, seeFigure 4-2, page 13. When all three weights are
mounted, they provide additional grinding pressure that increases the grinding effect.
When using a tool with a high removal rate, such as T-Rex™, we recommend a low
grinding pressure.
Note!
Too high a grinding pressure combined with an incorrect grinding tool may
cause damage to both the machine and the floor.

HTC 800 Classic Usage
1.0 13
Note!
Always dismantle the weights when you change tools, to make tipping the
machine easier.
Warning!
There is a risk of crush injuries when handling the weights, as these are heavy.
Therefore, the weights should always be handled with great care.
Figure 4-2. Handling weights
4.4 Access to grinding tools
Warning!
Always remove the weights before changing tools, to prevent the machine from
tipping back.
Warning!
The tool becomes very hot during use. Tip the machine back and allow it to
stand for a short while. Use protective gloves when removing the tools.
Warning!
Disconnect the electrical supply, when changing tools or repairing the machine.

Usage HTC 800 Classic
14 1.0
1. Set the handle to the rear position - see Figure 4-1, page 12
2. Removing the weights.
3. Tip the machine backwards carefully so that it rests on the floor.
4.5 Fitting and replacing grinding tools
Warning!
Disconnect the electrical supply, when changing tools or repairing the machine.
Warning!
The tool becomes very hot during use. Tip the machine back and allow it to
stand for a short while. Use protective gloves when removing the tools.
As the machine is equipped with the patented EZchange tool system, fitting and
replacing grinding tools is quick and easy. The tool system consists of wings on which
diamond grinding tools are fitted without the need for screws.