HTC 650 HDX User manual

1
Introduction
A winning combination of strength and versatility has made the HTC 650 one of the most sold grinders in the world. The
patented system with four grinding disks gives the machine balance and makes it easy to handle without compromising
performance and efciency. As with all HTC grinders, the HTC 650 has been engineered to meet stringent demands on
ergonomics, economy and ecology.
HTC 650 EX
HTC 650 EX is a professional machine for grinding large surfaces. The machine has an 7.5 kW 3-phase frequency control-
led motor that makes the machine insensitive to voltage drops. Combined with weights, this machine is ideal for people
who demand a lot of versatility.
HTC 650 HDX
The HTC 650 HDX has an extremely powerful motor producing an impressive 11 kW. Combined with up to 57 kilos of
weights, this machine is ideal for people with extremely high demands for cutting capacity. The HTC 650 HDX is an optimal
machine for grinding concrete oors using the HTC Superoor™ method and for removing coverings.
Standard equipment
The following equipment is always included: puncture-free polyurethane-lled rubber tires, quick contact between the
electronics and motor, splash guard, water tank, locking key for electrical cabinet, hook wrench for grinding disks and hour
counter.
Extra equipment
Pump for cooling the oor surface with water mist.
Sten Jeansson
Managing Director

2
Liability
• Although all possible measures have been taken to ensure the accuracy and completeness of the information presented
in this manual, we do not accept any responsibility or liability for errors or missing information. HTC reserves the right to
alter descriptions in this manual without prior notice.
• This manual is protected by copyright and no part may be copied or in any way used without the express written permis-
sion of HTC.
Trademarks
The HTC trademark is owned by HTC Sweden AB. Other names and products mentioned in this manual may be registered
trademarks of their respective companies.
© 2005 HTC Sweden AB. Sole rights.

3
Contents
Introduction.........................................................................................................................................................................................1
Liability ...................................................................................................................................................................................................2
Trademarks..........................................................................................................................................................................................2
Warranty.................................................................................................................................................................................................6
The manual ..........................................................................................................................................................................................6
Safety .......................................................................................................................................................................................................7
Vibration and noise........................................................................................................................................................................8
Machine plate.....................................................................................................................................................................................8
Unpacking the machine..............................................................................................................................................................9
CE marking ..........................................................................................................................................................................................9
Declaration of Conformity.......................................................................................................................................................10
HTC 650 ............................................................................................................................................................................................. 11
HTC 650 EX ......................................................................................................................................................................................... 11
HTC 650 HDX...................................................................................................................................................................................... 11
Function Description of Machine Components......................................................................................................13
1. Electrical cabinet:........................................................................................................................................................................13
2. Hour counter:................................................................................................................................................................................13
3. Connection, extractor:...............................................................................................................................................................13
4. Motor: ...............................................................................................................................................................................................13
5. 32A Connection, elec:................................................................................................................................................................13
6. Control panel: ...............................................................................................................................................................................13
7. Handle:.............................................................................................................................................................................................13
8. Handle locking: ............................................................................................................................................................................13
9. Water tank: .....................................................................................................................................................................................13
10. Weight: ..........................................................................................................................................................................................13
11. Weight lock:.................................................................................................................................................................................13
12. Splash guard: .............................................................................................................................................................................13
13. Grinding cover:..........................................................................................................................................................................13
Control Panel on the Machine..............................................................................................................................................14

4
Control Description - Control Panel................................................................................................................................15
1. Standby indicator - Power:......................................................................................................................................................15
2. Overload indicator:.....................................................................................................................................................................15
3. Resetting the electronics - Reset: ........................................................................................................................................15
4. Adjusting the rotational speed of the grinding head - Speed (Grinding Head Speed):..................................15
5. Start/Stop of the rotation of the grinding head - Start/Stop (Grinding Head): ...................................................15
6. Emergency Stop - EM-Stop:....................................................................................................................................................15
7. Ignition switch (Standby):........................................................................................................................................................15
Operation.............................................................................................................................................................................................16
Handle setting....................................................................................................................................................................................16
Grinder weights.................................................................................................................................................................................17
Tools - Access to Tools..................................................................................................................................................................18
Grinding tools - Mounting and changing ...............................................................................................................................19
Transport.................................................................................................................................................................................................20
Preparation for start........................................................................................................................................................................20
Operation.............................................................................................................................................................................................20
Standby ................................................................................................................................................................................................20
Operation via the control panel ..........................................................................................................................................21
The Emergency Stop on the machine......................................................................................................................................21
Start - up Procedure........................................................................................................................................................................21
Overload...............................................................................................................................................................................................21
Make operation easier................................................................................................................................................................22
Maintenance......................................................................................................................................................................................23
Cleaning the machine.....................................................................................................................................................................23
Spare parts and service............................................................................................................................................................23
Environment......................................................................................................................................................................................23
Technical data..................................................................................................................................................................................24
Troubleshooting.............................................................................................................................................................................26
Electronic error codes - Telemeqanique......................................................................................................................27
Electronic error codes - Hitachi SJ200..........................................................................................................................30
Parts list chassis ...........................................................................................................................................................................34
Parts list handle..............................................................................................................................................................................36

5
Parts list drive mechanism.....................................................................................................................................................38
Parts list grinding head ............................................................................................................................................................40
Parts list grinding holder.........................................................................................................................................................42

6
Warranty
The warranty only covers manufacturing faults. HTC is not responsible for any damage arising from, or caused by, trans-
port, unpacking or usage. In no case, and under no circumstances will the manufacturer be held responsible for damage or
faults caused by incorrect application, corrosion or due to usage that does not comply with the specications. The manufac-
turer is in no way liable for indirect damages or costs. The manufacturer warranty period is 12 months from commissioning,
although not longer than 18 months from delivery from the factory. See separate warranty terms.
Local distributors may have special warranty conditions that are stated in their terms of sale, terms of delivery and warranty
conditions. In the event of any uncertainty pertaining to the warranty conditions, please contact your distributor.
The manual
In addition to general functionality, this manual also covers the applications and maintenance of the HTC 650 EX/HDX
grinder. A number of symbols have been used to clearly mark the sections that are of extra importance in the manual, see
below. In order to avoid personal injury and material damage, as far as possible, it is of the utmost importance that you ca-
refully read and fully understand the texts that accompany these symbols. There are also some practical tips marked with a
symbol. The tips are there to help you use the machine and to get the best possible benets from the grinder.
This symbol means Warning! and means risk of personal injury or material damage if the machine and accompanying equipment is used
incorrectly.
If you see this symbol next to a text, read the text extra carefully and do not perform any operation you are unsure of. This is for your own
or for other users’ safety and to avoid damaging the machine or any other equipment.
This symbol means Note! and means risk of possible material damage if the machine and accompanying equipment is used
incorrectly.
If you see this symbol next to a text, read the text extra carefully and do not perform any operation you are unsure of. This is to avoid
damaging the machine or any other equipment.
This symbol means Tips! and means that you will given tips and advice on facilatory or wear-saving measures for your machine or
accompanying equipment.
If you see this symbol next to a text, you should read through the text as it will assist you in your work and extend the service life of the
machine.

7
Safety
The machine may only be operated or repaired by personnel who have undergone practical or theoretical training and
have read through this manual.
The instructions in this manual must be observed in order for CE marking to apply.
Only use the machine for grinding or polishing unhewn stone, terrazzo, concrete or any other ooring material specied in
this manual.
Do not use the machine in environments where there is a risk of explosion or re.
Wear personal protective equipment at all times - safety boots, hearing protectors, protective goggles and protective glo-
ves.
Do not start the machine in the folded position. Only start the grinder with the rotating disks facing the oor and with the
tools applied.
Be careful when replacing grinding tools as the tools and metal disks can be hot.
Disconnect the power supply from the machine when replacing the grinding tools.
Only lift the machine using the parts specied in this manual.
Do not use the machine on sloping surfaces.
Do not move the machine manually on sloping surfaces as there is a major risk of crushing if the machine starts to roll.
Always fold up the machine when removing glue or wet grinding so that the machine does not get stuck to the oor and
damage machine parts upon restart.
Always keep the machine in a dry and warm area when it is not being used.
If the machine is kept in a cold area, it must stand in a heated room for two hours prior to use.
Only use the machine with the splashguard installed.
Use only HTC original tools and genuine spare parts.

8
Vibration and noise
The machine has been tested in accordance with ISO 8662-4 and ISO 11202 for vibration and noise. The mean value for
vibrations is 1.01 m/s² which applies when the machine accelerates. Sound power level when rough grinding concrete is 93
dB (mean value). This value varies depending on the choice of tool and type of oor. Always wear hearing protection.
Machine plate
Model number and serial number for your machine is shown on the machine plate. This information is required when or-
dering spare parts for the machine. Use the space below to note the model number and serial number of your machine for
future reference.
MODEL NUMBER _______________________________________________________
SERIAL NUMBER _________________________________________________________
KEY NUMBER _______________________________________________________
Delivery
The following items should be included on delivery. Contact your distributor if anything is missing.
• Grinder
• Splash guard
• Manual
• Key

9
Unpacking the machine
Check carefully if the packaging or the machine has been damaged during delivery. If there are signs of damage,
contact your distributor and report the damage.
Check that the delivery matches your order. Contact your distributor if you have any questions.
Read carefully through the safety instructions and manual before use.
CE marking
CE marking of a product guarantees its free movement within the EU region in line with EU regulations. The CE marking
guarantees that the product meets the various directives (EMC directives and any other requirements in the new procedu-
res directives). The HTC 650 grinder has CE marking in accordance with the “Low Voltage Directive” (LVD), the Machinery
Directive and the EMC Directive. The EMC directive stipulates that the electrical equipment must not subject the surroun-
ding area to electro-magnetic radiation, and that it must also be immune to electromagnetic interference in the surrounding
area.
The following pages include the Manufacturer’s Declaration of Conformity that demonstrates that the HTC 650 grinder
complies with the EMC directives. HTC 650 is classied for use in environments such as heavy industry Class A.

10
Declaration of Conformity
As per the Machinery Directive, the 98/37/EG EMC Directive, 89/336/EEC Low Voltage Directive, 73/23/EEC including
amendments and as per the CE Marking Directive, 93/68/EEG
Type of equipment Grinder
Make HTC
Trademark HTC 650
Serial number ___________________
Manufacturer
HTC Sweden AB
Box 69
SE-614 22 Söderköping, Sweden
The product was CE marked in 2005.
As manufacturer, we declare under our sole responsibility that the product meets the provisions laid down in the Directives
specied above.
Date: 2005-06-01
Sten Jeansson
Managing Director

11
HTC 650
The HTC 650 has a winning combination of strength and
versatility. The patented system with four grinding disks
gives the machine balance and makes it easy to handle
without compromising performance and efciency. As with
all HTC grinders, the HTC 650 has been engineered to
meet stringent demands on ergonomics, economy and
ecology.
HTC 650 EX
HTC 650 EX is a professional machine for grinding
medium and large surfaces. The machine has an 7.5
kW 3-phase frequency controlled motor that makes the
machine insensitive to voltage drops. Combined with
weights, this machine is ideal for people who demand a
lot of versatility.
HTC 650 HDX
The HTC 650 HDX has an extremely powerful motor
producing an impressive 11 kW. Combined with weights,
this machine is ideal for people with demands for good
cutting capacity. The HTC 650 HDX is the perfect
machine for grinding concrete oors in line with the HTC
Superoor™ method and for removing coverings.
The technology and its benets
• A newly patented grinding system with four grinding
disks (previously three) gives the machine perfect ba-
lance and makes it easy to use.
• Option for greater motor output (HTC 650HDX)
• Integrated system of weights for adjusting grinding
pressure.
• Considerably improved grinding head with increased
service life and reduced maintenance.
• The 650EX/HDX is included in HTC Superoor™
approved equipment which means that it is recommen-
ded for production of HTC Superoor.
• More efcient and quicker grinding.
• Possibility to connect HTC 950RX.
• Fitted with EZchange for simple tool replacement.
All this means better nancial performance for our
customers.

12
Description of the machine
1
2
3
4
56
7
8
9
10
11
12
13
1. Electrical cabinet: 8. Handle locking
2. Hour counter 9. Water tank
3. Connection, extractor 10. Weight
4. Motor 11. Weight lock
5. 32 A Connection, elec 12. Splash guard
6. Control panel 13. Grinding cover
7. Handle

13
Function Description of Machine Components
1. Electrical cabinet:
Contains electronics for the grinding head.
2. Hour counter:
Shows how long the machine has been in service.
3. Connection, extractor:
Connect a sufciently large external dust extractor for
collecting grinding dust when dry grinding.
4. Motor:
The motor runs the grinding disks under the grinding
heads.
5. 32A Connection, elec:
Connect the mains electricity to this contact. See machi-
ne plate for the correct connection.
6. Control panel:
The machine’s control panel includes controls and swit-
ches for operating the oor grinders. Lamps here indi-
cate the status of the grinder.
See Pages 14-15 for a detailed description.
7. Handle:
The handle can be set in different positions according to
preference.
8. Handle locking:
Spring-loaded locks on both the top and bottom of the
handle.
9. Water tank:
Fill up water here when wet grinding.
10. Weight:
The weights can be lowered in three different positions.
See Page 17.
11. Weight lock:
Use to lock the weight in a specic position.
12. Splash guard:
The splash guard prevents grinding dust from spreading
outside of the machine’s working area.
13. Grinding cover:
Protective cover from the grinding head with grinding
tools.

14
Control Panel on the Machine
1
2
3
4
5
6
7
1. Standby indicator 4. Adjusting the rotation speed of the grinding
head
7. Ignition switch
2. Overload indicator 5. Start/Stop
3. Resetting the electronics 6. Emergency stop

15
Control Description - Control Panel
1. Standby indicator - Power:
This lamp indicates that the machine is in standby mode
with its systems activated. The position of the key in the
ignition switch determines whether the grinder is shut off
or in standby mode and ready for use.
2. Overload indicator:
This lamp lights when the grinder is using too much
power when processing. If you ignore the lamp, the
machine will cut the power supply to the motor and an
error code will be generated.
3. Resetting the electronics - Reset:
If the machine has any kind of error, it may need to be
reset. Hold the button down for two seconds to reset
the electronics. Any error codes can be viewed on the
frequency control display inside the electrical cabinet. A
description of the error codes is on Pages 27-32.
4. Adjusting the rotational speed of the grinding
head - Speed (Grinding Head Speed):
Use this knob to set the rotation speed for the grinding
head. The speed can be set before starting the grinding
head when starting at low speed, for example.
5. Start/Stop of the rotation of the grinding head -
Start/Stop (Grinding Head):
Use this switch to start or stop the grinding head and
grinding disk rotation.
6. Emergency Stop - EM-Stop:
Only use the Emergency Stop switch in emergencies
when immediate shutdown of the grinder is necessary.
7. Ignition switch (Standby):
Use the key to activate the grinder’s electrical system.
The machine assumes standby mode and is ready for
use.

16
Operation
The HTC 650 contains a number of functions that are
important to know prior to operation. Read carefully
through the functions of the various systems to ensure
you are fully familiar with them, allowing you to utilize
the grinder optimally.
Forward position: Used when transporting etc. when
the grinder takes up substantially less space.
Up position: Is ideal when operating via the radio control
unit. Run the mains cable and if necessary the extrac-
tor hose through the handle in this case. This position
also applies when the machine is tilted backwards when
changing grinding tools.
Back position: Always use when operating the grinder
manually but can also be used when operating via radio
control.
Picture 2. Depending on the type of work task a suitable position can
be set using the HTC 650’s adjustable handle.
Handle setting
Use the adjustable handle on the HTC 650 to set a sui-
table working height. A handle locking
mechanism is located on both the upper (see Picture 1)
and lower side of the handle cover. The handle can be
folded in several different positions (see Picture 2).
Picture 1. Release the handle by moving the two round safety grips
against each other. The handle now drops to the required xed
position. Release the safety grips again to lock.
Back position
Up position
Forward position

17
Grinder weights
The HTC 650 has weights that enable the easy move-
ment of the grinder’s center of gravity. There are two
weight locks on each weight for locking the weights in
either up or down position. The weights can also be set
to back position (towards the operator). See Picture 2
for normal position.
Move the weight by pulling the pin out and locking it in
out position by turning the pin. See Picture 1. Hanging
the weights forward, as in Picture 1, provides extra high
grinding pressure which increases the grinding effect.
We recommend normal position for the weights. Using
the wrong tools with a grinding pressure that is too high
may damage both the grinder and the oor.
If the weights are set to up position, see Picture 2,
the center of gravity is placed on the wheels instead. This
position for the weights is to be used when the machine is
to be transported. See Page 19, Mounting tools, for more
information.
When the weights are set to back position, see Picture 3,
the center of gravity is moved behind the machine. This
is recommended when using high cutting capacity tools
such as T-Rex™, but also when the grinder is to be tilted
backwards to change the tools.
Picture 1. The weights folded forwards
for higher grinding pressure.
Picture 2. Normal
position for the weights
Also used in up position
when transporting.
Picture 3. The
weights set to back
position when
mounting/changing
grinding tools.
The weight is not locked in back position. There is a risk
of crushing in the event of fault to a push rod.

18
Tools - Access to Tools
The grinder must be tilted backwards in order to mount
and change tools.
Raise the handle to upright position and set the weights
furthest back, see Picture 1.
To get a better effect when tilting the grinder, the operator
can put one foot against a weight and slowly tilt the
grinder until the back weights reach the oor, see Picture
2.
Always disconnect mains voltage from the grinder when
working with the grinding tools. Also remember that the
tools can be extremely hot following grinding work.
Picture 1. Fold the handle straight up and then set the weights to back
position. Put one foot against the framework and pull the machine
towards you.
Picture 2. Tilt the grinder backwards until the weights reach the oor.
Picture 3. Tilt the grinder back a little more until it is resting in back
position.