HTC 400 DS User manual

HTC 400 DS
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 400 DS
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 400 DS Table of contents
Table of contents
1. Introduction.........................................................1
1.1 General information...................................................... 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................................................3
1.7 Machine name plate..................................................... 4
1.8 Handling and storage................................................... 4
1.9 Vibration and noise.......................................................5
1.9.1 Hand and arm vibrations...................................... 5
1.9.2 Sound pressure level............................................5
2. Safety...................................................................6
2.1 General Information...................................................... 6
2.2 Warnings....................................................................... 6
2.3 Notes.............................................................................7
3. Machine description.......................................... 9
3.1 General machine description........................................9
3.2 Description of controls – Control panel...................... 12
4. Operation...........................................................13
4.1 General....................................................................... 13
4.2 Handle settings........................................................... 15
4.3 Access to grinding tools............................................. 16
4.4 Fitting and replacing grinding tools.............................16
4.4.1 Fitting grinding tools........................................... 16
4.4.2 Changing grinding tools......................................17
4.5 Preparations for dry grinding...................................... 18
4.6 Control........................................................................ 19
4.6.1 Starting and stopping the machine.....................19
4.6.2 Emergency stop switch...................................... 19
4.7 Making operation easier............................................. 21

Table of contents HTC 400 DS
5. Maintenance and repairs................................. 22
5.1 General....................................................................... 22
5.2 Cleaning......................................................................22
5.3 Daily............................................................................ 22
5.4 Every week................................................................. 22
5.5 Every month (or 100 hours)....................................... 23
5.6 Repairs........................................................................23
5.7 Spare parts................................................................. 23
6. Troubleshooting............................................... 24
6.1 General ...................................................................... 24
6.1.1 The machine will not start.................................. 24
6.1.2 The machine vibrates or wears the tool
unevenly.......................................................................24
6.1.3 The machine is grinding unevenly......................24
6.1.4 The fuses trip frequently.....................................24
6.1.5 The machine cannot cope.................................. 24
7. Technical data.................................................. 26
8. Environment..................................................... 28
9. Warranty and CE Marking............................... 29
9.1 Warranty .....................................................................29
9.2 CE marking................................................................. 29

HTC 400 DS Introduction
2.0 1
1. Introduction
1.1. General information
HTC 400 DS 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 that you are totally familiar with
the machine before you start using 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.

Introduction HTC 400 DS
2 2.0
The symbol indicates a Warning! and means that incorrect use
can result in personal injury or 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.
The 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.
The symbol indicates a 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 appropriate way to transport the machine is to firmly anchor it
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

HTC 400 DS Introduction
2.0 3
• Hammer EZ system
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.

Introduction HTC 400 DS
4 2.0
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. Kilowatt (kW)
6. Voltage (V)
7. Ampere (A)
8. Hertz (Hz)
9. Revolutions per minute (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.

HTC 400 DS Introduction
2.0 5
1.9. Vibration and noise
Warning!
Always use hearing protection when using the machine.
1.9.1. Hand and arm vibrations
Hand and arm-weighted vibration level [m/s²] for HTC 400 DS
have been measured using equipment approved in accordance with
ISO 5349-1:2001. Measurement uncertainty for the measurement
equipment has been assessed 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 6.42 4.86
Floor preparation (T-
rex) 4.9 8.33
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 on page 26.

Safety HTC 400 DS
6 2.0
2. Safety
2.1. General Information
This chapter contains all the warnings and notes that have to be
considered for HTC 400 DS.
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.

HTC 400 DS Safety
2.0 7
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.
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!
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.

Safety HTC 400 DS
8 2.0
Note!
For the CE marking to be valid, the instructions in this manual
must be followed.
Note!
The machine must only be lifted using the lifting eye intended for
the purpose in accordance with the relevant instructions.
Note!
The machine should be stored in a dry, warm (plus degrees)
location when not in use.
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!
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
cold water with no chemical additives may be used.

HTC 400 DS Machine description
2.0 9
3. Machine description
3.1. General machine description
The machine is made up of a number of main parts; see Figure
3-1 on page 10 and Figure 3-2 on page 11. There are three
motor alternatives: 400V 3-phase (EU), 460V 3-phase (US) and
208V 3-phase (US).
The machine is based on a wheeled chassis. The motor with the
rotating grinding unit is mounted on the lower part of the chassis
enabling some movement between the chassis and the motor
assembly.
The handle can be set at several different angles. Set the handle at
the 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.

Machine description HTC 400 DS
10 2.0
Figure 3-1 Machine front
1. Grinding cover
2. Lifting handle for grinding head
3. Motor
4. Lifting eye for machine
5. Adjustable handle
6. Suction hose
7. Wheels

HTC 400 DS Machine description
2.0 11
Figure 3-2 Machine rear
1. Control panel
2. Electrical connection
3. Extraction connection
4. Control cabinet

Machine description HTC 400 DS
12 2.0
3.2. Description of controls – Control
panel
The picture below shows the machine's control panel:
Figure 3-3 Control panel
1. EM-Stop - Emergency stop switch: Press the
switch in an emergency to turn off the power
to the machine.
2. On/Off - Start/stop the machine's functions:
Turn the knob to “I” to activate the machine's
functions and prepare for start. Turn the knob
to “O” to switch off the machine's functions.