Kemppi MLS 2300 User Manual

MasterTig

MLS 2300 ACDC

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OPERATING MANUAL

English

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

CONTENTS

EN

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

1. PREFACE

1.1 General

1.2 Product introduction

................................................................................................................................ 3

....................................................................................................................................... 3

............................................................................................................ 3

2. INSTALLATION ................................................................................................................. 4

2.1 Removal from packaging .................................................................................................... 4

2.2 Locating the machine ........................................................................................................... 4

2.3 Serial number ........................................................................................................................... 4

2.4 Installation and main parts ................................................................................................. 4

2.5 Installation of the panel ....................................................................................................... 5

2.6 Mains connection ................................................................................................................... 6

2.7 Distribution network ............................................................................................................. 6

2.8 Welding cable connections ................................................................................................ 6

2.9 Cooling unit to Mastercool 20 ........................................................................................... 6

2.10 Shield gas .................................................................................................................................. 8

3. OPERATION ........................................................................................................................ 9

3.1 Welding processes

3.1.1 MMA welding ................................................................................................................... 9

3.1.2 TIG welding Alternating Current .................................................................................... 9

3.1.3 TIG Welding with Direct Current ..................................................................................... 9

3.1.4 Synergetic Pulsed TIG welding .....................................................................................10

3.1.5 Long Pulsed TIG welding ...............................................................................................10

3.1.6 Spot welding function ...................................................................................................10

3.1.7 MicroTack™ function ......................................................................................................10

3.1.8 TIG-welding with mixed AC-DC current (MIX) .............................................................10

3.2 Operation functions ............................................................................................................10

3.2.1 Power source ..................................................................................................................10

3.2.2 Function panels .............................................................................................................10

3.2.3 Saving welding settings ................................................................................................15

3.2.4 Adopting the saved settings .........................................................................................16

3.2.5 Remote control memory channels ...............................................................................16

3.2.6 SETUP functions .............................................................................................................16

3.2.7 Foot pedal control R11F ................................................................................................16

3.3 Cooling unit operation Mastercool 20

3.4 Storage

.....................................................................................................................................16

3.5 SETUP-functions

3.6 Error codes ..............................................................................................................................18

................................................................................................................. 9

.........................................................................16

...................................................................................................................17

4. MAINTENANCE ..............................................................................................................18

4.1 Regular maintenance ..........................................................................................................18

4.2 Troubleshooting ...................................................................................................................19

4.3 Disposal of the machine ....................................................................................................19

5. ORDERING NUMBERS .............................................................................................20

6. TECHNICAL DATA ........................................................................................................21

2

1. PREFACE

1.1 GENERAL

Congratulations on your choice of the Kemppi MasterTig MLS ACDC welding system. Reliable
and durable, Kemppi products are aordable to maintain, and they increase your work
productivity.

This user manual contains important information on the use, maintenance and safety of
your Kemppi product. The technical specications of the device can be found at the end of
the manual. Please read the manual carefully before using the equipment for the rst time.
For your safety and that of your working environment, pay particular attention to the safety
instructions in the manual.

For more information on Kemppi products, contact Kemppi Oy, consult an authorised Kemppi
dealer, or visit the Kemppi Web site at www.kemppi.com.

The specications presented in this manual are subject to change without prior notice.

Important notes

Items in the manual that require particular attention in order to minimise damage and
personal harm are indicated with the ’NOTE!’ notation. Read these sections carefully and follow
their instructions.

Disclaimer

While every eort has been made to ensure that the information contained in this guide
is accurate and complete, no liability can be accepted for any errors or omissions. Kemppi
reserves the right to change the specication of the product described at any time without
prior notice. Do not copy, record, reproduce or transmit the contents of this guide without

prior permission from Kemppi.

1.2 PRODUCT INTRODUCTION

Kemppi Mastertig MLS™ ACDC is a family of TIG welding machines designed for industrial use,
with characteristics especially suitable for welding materials like aluminium and stainless steel.
The equipment consists of power source, function panel and welding torch. The cooling unit
Mastercool 20 is used in water-cooled TIG welding. The welding torch can be either water­cooled or gas-cooled.

Multipurpose power source Mastertig MLS™ 2300 ACDC of 230 A maximum current is
designed for demanding professional welding, suitable for electrode, TIG and pulsed TIG
welding with both direct and alternating current. The power source is controlled with IGBT
transistors with a frequency of approximately 65 kHz, and the operational functions with a
microprocessor.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

3

2. INSTALLATION

2.1 REMOVAL FROM PACKAGING

The equipment is packed in durable packages designed especially for it. However, it is
necessary to check the equipment before using it to make sure that the equipment or any part
of it has not got damaged during transportation. Also check that the delivery corresponds to
your order and that you have received all necessary instructions for installing and operating
the equipment. The packaging material is recyclable.

2.2 LOCATING THE MACHINE

Place the machine on a horizontal, stable and clean ground. Protect the machine from rain
and direct sunshine. Check that there is enough space for cooling air circulation in front of and
behind the machine.

2.3 SERIAL NUMBER

Serial number of the machine is marked on the rating plate. The serial number is the only
proper means of identifying parts for a specic product. It is important to make correct

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

2.4 INSTALLATION AND MAIN PARTS

reference to the serial number of the product when making repairs or ordering spare parts.

EN

1.

2.

3.

4.

5.6.

1.

2.

4

Front of machine

1. Function panel

2. Remote control connector

3. TIG torch control connector

4. Shield gas and current connector for
TIG torch

5. (+) connector for electrode holder

6. (–) connector for earth cable

2.

1.

Markings for (+/–) poles on the
machine front are embossed.

Rear of machine

1. Mains switch

2. Snap connector for gas

3.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

1. Installing gas-cooled torch

2. Installing water-cooled torch

3. Torch

2.5 INSTALLATION OF THE PANEL

1.

1. Fasten the cable connectors of the function panel to the power source (2 pieces).

2. Place the bottom edge of the panel behind the securing clips on the machine. Remove the
xing pin from the top edge with, for example, a screwdriver. Then gently push the
upper part of the panel into place. Make sure that the cables do not get damaged,
continue gently pushing the upper part of the panel until it clips into place. Finally, push
the xing pin back into its place.

EN

2.

5

2.6 MAINS CONNECTION

NOTE! Only an authorised electrician is allowed to install mains cable and plug!

The machine comes equipped with a three-metre power cord with a Schuko plug. Only an
authorised electrician is allowed to replace the plug. The fuse and cable sizes are given in the
Technical data at the end of this manual.

NOTE! This equipment’s electromagnetic compatibility (EMC) is designed for use in an industrial

environment. Class A equipment is not intended for use in residential location where the electrical
power is provided by the public low-voltage supply system.

2.7 DISTRIBUTION NETWORK

All regular electrical devices without special circuits generate harmonic currents into
distribution network. High rates of harmonic current may cause losses and disturbance to
some equipment. Equipment complying with IEC 61000-3-12.

2.8 WELDING CABLE CONNECTIONS

The welding cables must be made of at least 16 mm² copper cable.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

2.8.1 Choosing welding polarity in MMA welding

You can select the polarity electronically from the control panel, i.e. you do not have to switch
the places of the (+) and (-) connectors. Connect always the negative connector to the work
piece.

EN

2.8.2 Earthing

If possible, always fasten the earth clamp of return current cable directly onto work piece.

1. Clean contact surface of earth clamp from paint and rust.

2. Fasten clamp properly, so that contact surface is as large as possible.

3. Check that clamp is fastened rmly.

2.9 COOLING UNIT TO MASTERCOOL 20

NOTE! Cooling liquid is injurious! Avoid also contact with skin or eyes. In case of injury, seek for

medical advice.

Cooling unit Mastercool 20 together with TIG torch Kemppi TTC-W range enables TIG welding
with water-cooled torch.

The cooling unit is installed beneath the power source with screws. Electrical connections are
on the bottom of power source. Fill the reservoir with a 20 – 40 % mixture of glycol and water,
or with any other suitable antifreeze. The capacity of the reservoir is 3 litres.

Mastercool 20

6

Installation of cooling unit:

Electrical connection for the cooling unit:

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

2.

1.

1. 230 V

2. Control connector

3. Equipment earth

NOTE! Only an authorised electrician is allowed to install electrical connection!

3.

EN

7

2.10 SHIELD GAS

NOTE! Handle gas bottle with care. There is a risk for injury if gas bottle or bottle valve is damaged!

Use inert gases such as argon, helium or argon-helium mixture as shield gas for TIG welding.
Make sure that the gas ow regulator is suitable for the gas type used. The ow rate is set
according to the welding current, joint form and the size of the electrode. A suitable ow rate
is normally
8 – 10 l/min. If the gas ow is not suitable the welded joint will be porous. Spark ignition
becomes more dicult if the gas ow is too high. Contact your local Kemppi dealer for
choosing gas and equipment.

A C

F

G

EN

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Parts of gas ow regulator

A. Gas bottle valve
B. Pressure regulation screw
C. Connecting nut
D. Hose spindle
E. Jacket nut
F. Gas bottle pressure meter
G. Gas hose pressure meter

2.10.1 Installation of gas bottle

NOTE! Always fasten gas bottle properly in vertical position in a special holder on the wall or on a

carriage. Remember to close gas bottle valve after having nished welding.

The following installation instructions are valid for most gas ow regulator types:

1. Step aside and open the bottle valve (A) for a while to blow out possible impurities from the
bottle valve. Note! Watch out for the gas ow.

2. Turn the press regulation screw (B) of the regulator until no spring pressure can be felt.

3. Close needle valve if there is one in the regulator.

4. Install the regulator on bottle valve and tighten connecting nut (C) with a wrench.

5. Install hose spindle (D) and jacket nut (E) into gas hose and tighten with hose clamp.

6. Connect one end of the hose with the regulator and the other end with the power source.
Tighten the jacket nut.

7. Open bottle valve slowly. Gas bottle pressure meter (F) shows the bottle pressure.

NOTE! Do not use the whole contents of the bottle. The bottle should be lled when the bottle

pressure is 2 bar.

8. Open needle valve if there is one in the regulator.

9. Turn regulation screw (B) until hose pressure meter (G) shows the required ow (or pressure).
When regulating ow amount, the power source should be switched on and the gun
switch pressed simultaneously.

Close bottle valve after having nished welding. If the machine will be out of use for a long
time, unscrew the pressure regulation screw.

B

E
D

8

3. OPERATION

NOTE! Welding in places presenting an immediate re or explosion hazard is forbidden!

NOTE! Welding fumes may cause injury, take care of sucient ventilation during welding!

3.1 WELDING PROCESSES

3.1.1 MMA welding

With Mastertig MLS™ ACDC power sources you can use all electrodes suitable for direct and
alternating current welding between current limits of the power source. Both function panels
(ACS, ACX) can be used for electrode welding when MMA welding is selected.

3.1.2 TIG welding Alternating Current

The Mastertig ACDC MLS™ power sources are specially designed for TIG welding aluminium
with alternating current (AC). We recommend using WC20 electrodes (grey) for AC welding.

The table is only given as a guide.

Welding current range AC Electrode Gas nozzle Gas flow rate

min. min. maks. WC20

A A
15 25 90 1,6 4 / 5 / 6 6,5 / 8,0 / 9,5 6...7
20 30 150 2,4 6 / 7 9,5 / 11,0 7...8
30 45 200 3,2 7 / 8 / 10 11,0 / 12,5 / 16 8...10
40 60 350 4,0 10 / 11 16 / 17,5 10...12

The table and the panel scale are based on the use of WC20 (grey).

A

ø mm

3.1.3 TIG Welding with Direct Current

DC welding is typically used when welding dierent grades of steel. We recommend using
WC20 electrodes (grey) for DC welding.

A directive electrode selection table for DC welding.

Welding current range Electrode Gas nozzle Gas flow rate

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Argon
l/min

number ø mm

EN

DC WC20

A ø mm l/min
5 ... 80 1,0 4 / 5 6,5 / 8,0 5 ... 6
70 ... 140 1,6 4 / 5 / 6 6,5 / 8,0 / 9,5 6 ... 7
140 ... 230 2,4 6 / 7 9,5 / 11,0 7 ... 8

number ø mm

Argon

9

3.1.4 Synergetic Pulsed TIG welding

The ACX panel includes the synergetic TIG process, in which you only need to adjust the
welding current while other pulse parameters are programmed. Pulsing frequency is high,
which guarantees concentrated arc and increased welding speed.

3.1.5 Long Pulsed TIG welding

This method gives you the possibility to adjust all pulse parameters. Weld pool control is also
easier. Long pulsed TIG welding is included in the ACX panel.

3.1.6 Spot welding function

In spot welding function you can to adjust the duration of the welds in the range 0-10 s.

3.1.7 MicroTack™ function

MicroTack welding is an ecient way to connect thin materials together using low heat input,
which decreases distortions in base material.

3.1.8 TIG-welding with mixed AC-DC current (MIX)

Especially joining materials of dierent thicknesses can best be made out by using mixed

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

current. Adjust values with SETUP-function if needed.

3.2 OPERATION FUNCTIONS

3.2.1 Power source

EN

NOTE! Always switch the machine on and o from main switch. Do not use the mains plug for

switching!

NOTE! Never watch the arc without a proper face shield designed for arc welding! Protect yourself

and the surroundings against welding arc and hot spatters!

3.2.2 Function panels

Before welding starts, welding settings suitable for the work piece are chosen with the
function panel.

The Kemppi Multi Logic System, MLS™, allows you to select the function panel based on the
purpose of use: the ACS panel for AC TIG welding with basic functions, or the ACX panel with
pulsed TIG, 4T-LOG or MINILOG control of welding current and memory channel functions.

The current display accuracy is 3 % ± 2 A, and the voltage display accuracy is 3 % ± 0.2 V.

Indicator lights

1.

1. Power On

2. Thermal overload of power source

3. Wrong mains voltage, over or under-voltage

2. 3.

10

ACS welding panel – basic functions

12. 13. 14. 15. 16.

1.

4.

9.

5.

8.

6.

2.

17.

3.

10.

11.

7.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

1. Selection button and indicators for TIG welding and current type

2. Selection button and indicators for MMA welding and current type

3. Current and voltage display, display for other welding parameters

4. QUICK SETUP button for MMA and TIG adjustments (e.g. balance adjustment)

5. Selection of the torch switch function 2T/4T

6. HF/contact TIG (WATER FILL) button

7. Remote control selection button (setting the limits for the adjustment range: LO/HI)

8. Welding parameter selection buttons (arrow buttons)

9. RETURN button / returns to welding current

10. GAS TEST button

11. Potentiometer for welding parameter adjustment

12. Pre-gas 0.0 - 10.0 s

13. Upslope 0.0 - 10.0 s

14. Hot Start current 100 – 150 % (100 %: not in use)

15. Welding current

16. Downslope 0.0 - 15.0 s

17. Post-gas 1.0 - 30.0 s

1. MMA

Select MMA welding by pressing the MMA selection button. The indicator light next to the
button will light up when MMA is selected. The current type indicator light indicates which
current is selected: AC, DC-, DC+. Change the current type by pressing the MMA button again,
and the indicator light will indicate the selected current.

Press the QUICK SETUP button if you wish to adjust the dynamics or ignition pulse to MMA
welding. Navigate with the arrow buttons and adjust with the potentiometer. Quit by pressing
again QUICK SETUP- or RETURN-button.

11

EN

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

1. Dynamics (“Arc” –9 … 0 … +9)

You will see the numerical value corresponding to the MMA dynamics in the display.
Factory setting for all electrode types is zero. You can change the value by turning the pulse
potentiometer. If numerical value is adjusted negative (-1...-9) the arc is softened, and the
amount of spatter decreases when welding at the upper end of the recommended current
range of the electrode. On the positive side (1...9) the arc is rough.

2. Ignition pulse (Hot –9 … 0 … +9)

You will see on the display the numerical value corresponding to the MMA hot start pulse. You
can adjust the value by turning the potentiometer. A positive value corresponds to a more
powerful pulse, with zero being the default setting.

2. TIG welding

Select TIG welding by pressing the TIG button. You can change the current type by
pressing the selection button again (AC, MIX, DC-, DC+). Selecting DC+ requires holding
down the button. According to selected current mode you can adjust parametres by
using QUICK SETUP -funktion. Quit from QUICK SETUP -function by pressing QUICK SETUP

-button. At the same time you can see recommended diameter for elektrode.

AC TIG (alternating current TIG)

Intended for welding aluminium. You can adjust, for example, the balance and frequency
of the alternating current with the QUICK SETUP and arrow buttons. The following
welding parameters can be adjusted:

1. Balance (bAL -50 … 0, factory setting –25%)

A positive balance value breaks up aluminium oxide more eectively but heats the
electrode more than the workpiece (the tip blunts).

A negative balance value increases heat generation and penetration in the base metal,
while decreasing oxide break-up.

If you wish to increase electrode temperature when welding with a blunt-headed
electrode, adjust the balance in the positive direction, and if you wish to decrease
electrode temperature when welding with a sharp electrode, adjust the balance
correspondingly in the negative direction.

At the factory setting, the electrode tip remains almost sharp.
A sharp electrode allows welding with a narrower arc, achieving a narrower weld and

deeper penetration than with a blunted electrode. Narrow welding is especially useful
when llet welding.

Welding with a blunted electrode produces a wide arc, which also widens the area of
oxide break-up. Application areas include repair welding and casting.

12

2. Frequency (FrE 50 … 250 Hz, factory setting 60 Hz)

Raising the frequency will make the arc slightly more stable and narrow, but it will
increase the noise caused by arc.

3. Selection of AC waveform, sine or square wave (SinuS/SquArE)

The waveform aects the noise level and penetration of the arc. A sine waveform
generates a lower noise level, while a square wave has better penetration (factory setting).

4. Hot Start time for the 2T function (H2t 0.1 s…5.0 s, factory setting 1 s)

Pre-heating timer for the 2T switch function. The workpiece can be pre-heated (Hot Start)
with both AC and DC currents. The time set here remains in eect for DC TIG current types.

3. MIX TIG (mixed current AC/DC-)

With mixed current frequency and balance of alternating current are determined by
adjustments made for AC-current. Adjust by choosing sections 4. – 5. if needed.

The following QUICK SETUP parameters can be adjusted:

1. AC-time (AC 10 ... 90 %, factory setting 50 %)

2. Cycle time (CYc 0.1 ... 1.0 s, factory setting 0.6 s)

3. DC-current (DC(-) 50 ... 150 %, factory setting 100 %)

4. Balance (bAL -50 … 0 … +10 %, factory setting –25 %)

5. Frequency (FrE 50 … 250 Hz, factory setting 60 Hz)

6. Selection of AC waveform, sine or square wave (SinuS/SquArE)

7. Hot Start time for the 2T function (H2t 0.1 s…5.0 s, factory setting 1.0 s). Can be seen only on
the 2T function.

Factory setting is marked with a dot after the numeric value.
Growing DC-current increases penetration but decreases cleaning eect.

4. DC- (or DC+) (direct current)

No parameters to adjust. You can see recommended diameter for elektrode by pressing QUICK
SETUP -button. Diameter depends on current adjustment.

HF/contact ignition in TIG welding (water ll)

TIG arc can be started either with high frequency (HF) or without (contact ignition). HF
ignition is chosen by pressing the HF CONTACT button to turn on the HF light.

If you use water-cooled torch you can ll it with water by pressing the HF CONTACT button for
more than 2 seconds. The display reads ’COOLER’.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Welding torch switch 2 sequence function

Gas ow starts when the torch switch is pressed. Welding starts, and the current will rise to
the Hot Start current within the up-slope time, remain at that level for the set time (H2t) and
then change to the welding current. The Hot Start function can be disabled and green panel
light switches o when the Hot Start current is adjusted to 100 %. The current will then rise
directly to the welding current level within the up-slope time. Release the torch switch, and
the current starts to drop, and after the selected down-slope time the arc is broken. After this,
the shield gas will ow for the time selected.

Welding torch switch 4 sequence function

Gas ow starts when the torch switch is pressed. Release the torch switch. The ignition spark
ignites the arc, and the current will rise to the Hot Start current within the up-slope time. You
can switch from Hot Start current to welding current with a short press of the torch switch.
You can disable the Hot Start function by adjusting the Hot Start current to zero per cent. The
current will then rise directly to the welding current level within the up-slope time.

Press the torch switch down, and the welding continues. Release the torch switch, and the
current starts to drop and after the selected down-slope time the arc is broken. After this, the
shield gas will ow for the time selected.

Remote control

If you choose to adjust the welding current with a remote control unit you need to connect
the unit and select the remote control selection button. The PANEL light switches o, and
you can select the unit (R10, foot pedal control R11F, or torch control). The foot pedal control
works only in 2T mode. Hold the remote control selection button (LO/HI) down to adjust the
limits of the remote control’s adjustment range.

EN

Adjustment of parameters

To select TIG welding parameters you only need to use two buttons: arrow-left and arrow­right. Red panel light shows parameter you have chosen. Adjustment is done with the
potentiometer. When pressing the RETURN button, adjustment of parameters goes straight
to welding current. The display shows automatically numeric values and the units of the
parameters. When you adjust the parameters, you can see the value on the numerical display.
After 10 seconds, the display will return to the welding current.

13

Welding panel ACX

– pulsed TIG and MINILOG function with memory

2.

3. 4. 7. 8.

9.

11.

5.

10.

EN

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

1.

6. 12. 13.

1. 4T-LOG and MINILOG function selections

2. Search arc 5 – 90 % of welding current

3. Start-current 80 – 150 %

4. Minilog-current 10 – 150 % of welding current

5. Tail arc 5 – 90 % of welding current

6. Selection for spot, synergetic quick pulse and long pulse

7. Spot time 0,0 – 10,0 s

8. Pulse current 10 A – power source max.

9. Pulse ratio 10 – 70 % of pulse time

10. Frequency 0.2 – 250 Hz DC-TIG, 0.2 – 20 Hz AC-TIG

11. Base current 10 – 70 % of pulse current

12. MEMORY, memory function

13. Selection of channel in memory function

14. SAVE/memory values
If wanted in SETUP-function you can disable search arc and tail arc functions. Hot Start (Soft

Start)- and Minilog -currents can be disabled by adjusting the values to 100 per cent (the same
as the welding current).

14.

14

Minilog

When torch switch is pressed gas ow starts. When you release the torch switch current goes
through upslope to Hot Start or Soft Start -current depending on adjustments and by pressing
shortly again to welding current. After another short press it goes to Minilog operation, and
you can select from two current levels: the welding current and the Minilog current. You can
move from one to the other by quickly pressing the torch switch. Press the torch switch for
one second, release it and current goes to downslope and tail arc. Arc is cut by short press of
the switch.

4T-LOG

When torch switch is pressed current goes to search arc; after the switch is released current
goes to welding current within the upslope time. When the switch is pressed again, current
goes to downslope and then to the tail arc. Current stops when the switch is released.

Synergetic quick pulse

Press the PULSE button twice and the synergetic light turns on. Pulse parameters are
calculated automatically when average welding current is selected. Other pulse selections are
not necessary.

Long pulse

Long pulse method gives you the possibility to adjust all pulse parameters (pulsing frequency,
pulse ratio, pulse current and pause current). You can also adjust the welding current, in which
case you receive a new pulse current value. Pulse ratio and pause current percentage remain
constant. When you adjust the pulse ratio, pulse current or pause current, the new average
welding current value is shown on the display.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Spot welding function

The function can be used both in 2T and 4T mode. Enter the spot duration by pressing arrow
button, and when the led is lit you can choose the spot time needed by turning the pulse
potentiometer.

TIG -Micro tack welding function (MicroTack™)

You can select the Micro Tack function with a long press of the SPOT arrow button. When this
function is activated, the machine automatically enables the DC- welding mode, 2T switch mode
and contact ignition. Also the upslope and downslope values are set to zero and SPOT led starts to
blink. To inactivate the Micro Tack you press briey the same arrow button.

This function can be used with HF ignition and 4T mode. The duration of the spot weld can be
adjusted by pressing Quick Setup button and selecting a value in the range 1-200 ms. The Micro
Tack welding current can be adjusted with the control knob, when the welding current led is on.

3.2.3 Saving welding settings

ACX panel has 10 memory channels for user settings. The selections are made in the MEMORY
eld. Not only welding parameters but also function selections can be saved in the memory.
MMA welding values can also be stored in memory channels. Proceed as follows:

1. Press MEMORY button and if the SET light starts blinking the channel is free. If a channel is in
use, the ON light will light up. Press again, and the SET light will be continuously lit.

2. Select memory channel by pressing CH button.

3. Select the parameters and press SAVE button.

4. Press MEMORY button twice. ON led is lit.

5. Start welding.

If the saved settings need to be adjusted the led has to be moved from ON to SET position in
order to select parameters. Press the SAVE button.

When the memory function is in OFF state (no lights on) it is also possible to save the currently
used panel parameters by pressing SET/SAVE, by choosing channel ja by pressing SET/SAVE
again. Channel is cleared if MEMORY and CH buttons are pressed simultaneously in SET mode.

EN

15

3.2.4 Adopting the saved settings

1. Select MEMORY by pressing the button.

2. Select memory channel by pressing the CH button.

3. Start welding.

3.2.5 Remote control memory channels

Memory channels are selected by pressing simultaneously both REMOTE and CH button. With
the remote control you can retrieve saved settings on memory channels 1-5. The selected
channel is marked with a dot.

3.2.6 SETUP functions

A so called SETUP state is included for modifying panel functions. You can enter the SETUP
state by pressing the SETUP button longer than normally. Exit is performed in the same way.
You can select the function (see list below) by pressing the arrow buttons and then change
the setting by turning the potentiometer. See SETUP-function table on the next page.

3.2.7 Foot pedal control R11F

First read ”ACS Welding Panel – Basic Functions” point ”Remote control” for installing the

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

remote control ready for operation. Foot pedal R11F is used in TIG welding, and its control
range is adjustable. The minimum value of control range is set with the panel potentiometer
when the pedal is not pressed, display shows ”LO”. Control range maximum is set similarly by
pressing rst the PEDAL LO/HI button on the panel, display shows ”HI”. Welding is started with
a light press on the pedal, the arc ignites to the set minimum current. Welding current goes
to maximum when the pedal is pressed to the bottom. The arc is broken when the pedal is
released. Adjust again if necessary.

EN

3.3 COOLING UNIT OPERATION MASTERCOOL 20

The operation of Mastercool cooling unit is controlled by the power source. The cooling unit
pump starts automatically when welding starts. Proceed as follows:

1. Start power source.

2. Check water level and input ow of the reservoir, add liquid if needed.

3. If you use a water-cooled torch you can ll it with water by pressing WATER FILL button for
more than 2 seconds.

The pump operates for 4 another minutes after welding has been nished to cool the water to
the same temperature as in the machine surrounds. This reduces the need of service.

Thermal overload

The thermal overload light is lit, the machine stops and display shows COOLER when
temperature control of the machine has detected cooling water overheating. The cooling unit
fan cools down the water, and when the light goes out welding can be started again.

Water ow signal

Display shows COOLER when water ow is blocked.

3.4 STORAGE

The machine must be stored in a clean and dry room. Protect the machine from rain and direct
sunshine in places where temperature exceeds +25 °C.

16

3.5 SETUPFUNCTIONS

SETUP-function Display *C = Common: applies to all memory channels

Upslope current dependency (*C)

Downslope current dependency (*C)

TIG Antifreeze (*C)

MMA Antifreeze (*C)

VRD (*C)

2T downslope cut off

Tacking automatics

Limitation of rate of current rise with
high currents

MMA/TIG method selection with
remote control (C*)

SearchArc On/Off

Current freeze function

Memory channel selection with Up/
Down buttons (C*)

Activation of the Plus/Minus buttons
(C*)

Water cooler flow guard (C*)

Water cooler automatic control (C*)

Water cooler temperature guard (C*)

Automatic remote control device
recognition (C*)

Tail arc

Factory setting with a grey background

A1 ON The upslope time is determined by the current.

OFF The upslope time remains as set.

A2 ON The downslope time is determined by the current (the

user may set the slope gradient).

OFF The downslope time remains as set.

A3 ON TIG Antifreeze on.

OFF TIG Antifreeze o.

A4 ON MMA Antifreeze on.

OFF MMA Antifreeze o.

A7 ON VRD mode: idle voltage < 35 V

OFF Normal idle voltage

A8 ON In 2T mode, cut o the downslope with a quick push of

the start button.

OFF Quick push has no eect.

A9 ON If welding has lasted less than 3 seconds, no downslope

when welding is stopped.

OFF Tacking automatics o.

A10 ON If the current is over 100 A and UpSlope is 0.0 sec., there is

a 0.2-second slope from half the welding current.

OFF Current rises directly to maximum.

A12 ON TIG = the start of remote control scale.

MMA = the end of the scale.

OFF Remote control as a normal current regulator.

A13 ON SearchArc on.

OFF SearchArc o.

A14 ON During the downslope, the current can be ‘frozen’ at a

certain level by pushing the start button.

OFF Freeze function o.

A15 ON The Plus/Minus buttons on the remote control can be used

to select the memory channel.

OFF The buttons adjust the current.

A16 ON The Plus/Minus remote control is always active.

OFF The Plus/Minus remote control is active only when

selected by pressing the REMOTE button.

A17 ON Flow guard on.

OFF Flow guard o.

A19 ON Automatic control on.

OFF Water cooler runs constantly.

A20 ON Water cooler temperature guard selected.

OFF Temperature guard o.

A21 ON Automatic recocnition on, control cannot be selected if it

is not connected.

OFF Automatic recocnition On/O. Controller can be selected

even if it is not connected.

A22 ON* Tail arc on. * 4T LOG

OFF** Tail arc o. ** MINILOG

17

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

3.6 ERROR CODES

The machine always checks its operation automatically during start-up and reports any
failures detected. If failures are detected during start-up, they are shown as error codes on the
control panel display.

Err3: Overvoltage or undervoltage

The machine has stopped the welding because it has detected momentary voltage spikes or
continuous mains over- or under-voltage dangerous to the machine. Check the quality of the
supply network.

Err4: Power source overheating

The power source has overheated. The cause may be one of the following:

• The power source has been used for a long time at maximum power.

• The circulation of cooling air to the power source is blocked.

• The cooling system has experienced a failure.

Remove any obstacle to air circulation, and wait until the power source fan has cooled down
the machine.

4. MAINTENANCE

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

NOTE! Watch out for mains voltage when handling electric cables!

Degree and circumstances of machine utilisation should be taken into consideration when
planning product maintenance. Careful use and preventive maintenance help to avoid
unnecessary production disturbances and breaks. Check the condition of the welding and
connection cables daily. Do not use damaged cables.

EN

4.1 REGULAR MAINTENANCE

4.1.1 Every sixth months

NOTE! Disconnect the plug of the machine from the mains socket and wait for ca. 2 minutes

(capacitor charge) before removing the casing plate.

The following maintenance operations should be carried out at least every sixth
months:

• Electric connections of the machine - clean any oxidised parts and tighten any loose
ones.

NOTE! You must know the correct tension torques before you start repairing the connections.

• Clean the inner parts of the machine from dust and dirt e.g. with a soft brush and a
vacuum cleaner. Do not use compressed air because there is the danger that the dirt
is packed even more tightly in the gaps of the cooling proles. Do not use a pressure
washer.

NOTE! Only an authorised electrician may repair the machine.

4.1.2 Service contract

KEMPPI service workshops make special service contracts with customers about regular
maintenance. All parts are cleaned, checked and if necessary, repaired. Also the operation of
welding machine is tested.

18

4.2 TROUBLESHOOTING

Power On light is not lit.

There is no power in the machine.

• Check mains fuses, replace blown fuses.

• Check mains cable and plug, replace defect parts.

The machine is not welding properly.

There are plenty of spatters during welding. Weld joint is porous or power supply is
insucient.

• Check welding settings and adjust if needed.

• Check gas ow and gas hose connection.

• Check that earth clamp is properly fastened and that earth cable has no defects. Change

the position if necessary and replace defect parts.

• Check welding torch cable and connector. Tighten the connection and replace defective
parts.

• Check the consumable parts of welding torch. Clean and replace defect parts.

• Check mains fuses, replace blown fuses.

Power source overheat indicator light is lit.

Power source is overheated.

• Check that there is enough free space behind the machine for cooling air circulation.

• Check cooling unit for water circulation, clean cooling unit lter and air grate. Add

cooling liquid if necessary.

For further information and assistance, contact your nearest Kemppi service workshop.

4.3 DISPOSAL OF THE MACHINE

Do not dispose of electrical equipment with normal waste!
In observance of European Directive 2002/96/EC on waste electrical and electronic

equipment, and its implementation in accordance with national law, electrical equipment
that has reached the end of its life must be collected separately and taken to an appropriate
environmentally responsible recycling facility.

The owner of the equipment is obliged to deliver a decommissioned unit to a regional
collection centre, per the instructions of local authorities or a Kemppi representative. By
applying this European Directive you will improve the environment and human health.

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

19

5. ORDERING NUMBERS

EN

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Power source Mastertig MLS™ 2300 ACDC

Panels

ACS

ACX

Cabels

Welding cable

Welding cable

Welding cable

Welding cable

Earth cable

Earth cable

Earth cable

Earth cable

Torches

TTC 160

TTC 160

TTC 160

TTC 220

TTC 220

TTC 220

Gas flow meter AR/clock

Cooling unit

Mastercool 20

Water-cooled torches

TTC 200W

TTC 200W

TTC 200W

TTC 250W

TTC 250W

TTC 250W

Optional device

TIG torch controls

RTC 10

RTC 20

Remote control

R 10

R11F

Transport unit

T130

T110

6162300

6162805

6162804

16 mm² 5 m 6184103

25 mm² 5 m 6184201

25 mm² 10 m 6184202

35 mm² 5 m 6184301

16 mm² 5 m 6184113

25 mm² 5 m 6184211

25 mm² 10 m 6184212

35 mm² 5 m 6184311

4 m 627016004

8 m 627016008

16 m 627016016

4 m 627022004

8 m 627022008

16 m 627022016

6265136

6162900

4 m 627020504

8 m 627020508

16 m 627020516

4 m 627025504

8 m 627025508

16 m 627025516

6185477

6185478

6185409

6185407

6185222

6185251

20

6. TECHNICAL DATA

Power source Mastertig MLS™ 2300 ACDC

Connection voltage

Rated power

40% ED TIG

60% ED TIG

100% ED TIG

40% ED MMA

60% ED MMA

100% ED MMA

Connection cable

Fuse (delayed)

Welding current range

Max welding voltage

Electrode sizes to be welded

Open circuit voltage, max.

Welding current adjustment

Efficiency at nominal values

Power factor
at nominal values

Open circuit power

External dimensions

Weight

1~230 V –15%…+15%

230 A 5,7 kVA

200 A 4,8 kVA

170 A 3,9 kVA

180 A 6,0 kVA

150 A 4,8 kVA

120 A 3,7 kVA

H07RN-F 3G2.5 (3.3 m)

15 A

TIG 3 A / 10,0 V...230 A / 19,2 V

MMA 10 A / 20,5 V...180 A / 27,2 V

32 V / 180 A (MMA)

Ø 1,5...4,0 mm

58 V

stepless

82 % (180 A / 27,2 V),
78 % (230 A / 19,2 V)

0,99

TIG 6 W

MMA 180 W

LxWxH 430 x 180 x 390 mm

height 650 mm (power source + cooling unit)

15 kg

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

Cooling unit (TIG-welding) Mastercool 20

Connection voltage

Connection capacity

Cooling power

Start pressure, max

Cooling liquid

Reservoir volume

External dimensions

Weight

230 V -15 %...+15 %

100 % ED 50 W

1,0 kW

4,0 bar

20 % - 40 % glycol-water

approx. 3 l

LxWxH 500 x 180 x 260 mm

8 kg

21

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

Power source and cooling unit

Operating temperature range

Storage temperature range

EMC class

Degree of protection

Recommended generator Smin 8 kVA

-20 °C .... +40 °C

-20 °C .... +60 °C

A

IP 23 C

EN

22

MasterTig MLS 2300 ACDC / © Kemppi Oy / 1112

EN

23

KEMPPI OY

Hennalankatu 39
PL 13
FIN-15801 LAHTI
FINLAND
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Kotimaan myynti:

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myynti.@kemppi.com

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Box 717
S-194 27 UPPLANDS VÄSBY
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Postbus 5603
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KEMPPI (UK) Ltd

Martti Kemppi Building
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KEMPPI FRANCE S.A.S.

65 Avenue de la Couronne des Prés
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KEMPPI GmbH

Otto-Hahn-Straße 14
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Ul. Borzymowska 32
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13 Cullen Place
P.O. Box 5256, Greystanes NSW 2145
SMITHFIELD NSW 2164
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OOO KEMPPI

Polkovaya str. 1, Building 6
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RUSSIA
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ООО КЕМППИ

ул. Полковая 1, строение 6
127018 Москва
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KEMPPI, TRADING (BEIJING) COMPANY,
LIMITED

Room 420, 3 Zone, Building B,
No.12 Hongda North Street,
Beijing Economic Development Zone,
100176 Beijing
CHINA
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[phone]
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肯倍贸易（北京）有限公司
中国北京经济技术开发区宏达北路12号
创新大厦B座三区420室 (100176)

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[phone]
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KEMPPI INDIA PVT LTD

LAKSHMI TOWERS
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1910032

1112