Kemppi fastmig kms 400 mvu User manual

1905300
0647
Operating instructions • english
Bruksanvisning • norsk
FASTMIG™
KMS 400 MVU

2 – Fastmig™ Kms 400 mVU / 0647 © Kemppi oy
CONTENTS
1. PREFACE....................................................................................................................... 3
1.1. INTRODUCTION......................................................................................................... 3
1.2. PRODUCT INTRODUCTION ...................................................................................... 3
1.2.1. OPERATION CONTROL AND CONNECTORS............................................. 3
1.3. ACCESSORIES........................................................................................................... 4
1.3.1. REMOTE CONTROL DEVICES..................................................................... 4
1.3.2. CABLES ......................................................................................................... 4
1.4. OPERATION SAFETY................................................................................................. 5
2. INSTALLATION.............................................................................................................. 6
2.1. SITING THE MACHINE............................................................................................... 6
2.2. CONNECTION TO THE MAINS SUPPLY................................................................... 6
2.3. WELDING AND EARTH CABLES ............................................................................... 7
3. OPERATION CONTROL SWITCHES AND POTENTIOMETERS AND THEIR USE.... 7
3.1. MAIN SWITCH I/O....................................................................................................... 7
3.2. PILOT LAMPS ............................................................................................................. 7
3.3. OPERATION OF COOLING FAN ................................................................................ 8
4. MANUAL METAL ARC WELDING ................................................................................ 8
5. MAINTENANCE............................................................................................................. 8
5.1. CABLES ...................................................................................................................... 8
5.2. POWER SOURCE....................................................................................................... 8
5.3. REGULAR MAINTENANCE........................................................................................ 8
6. OPERATION DISTURBANCES..................................................................................... 9
6.1. OPERATION OF THE OVERLOAD PROTECTION.................................................... 9
6.2. CONTROL FUSES ...................................................................................................... 9
6.3. UNDER- AND OVERVOLTAGES IN THE MAINS SUPPLY ........................................ 9
6.4. LOSS OF A PHASE IN THE MAINS SUPPLY............................................................. 9
7. DISPOSAL OF THE MACHINE ..................................................................................... 9
8. ORDERING NUMBERS............................................................................................... 10
9. TECHNICAL DATA .......................................................................................................11
10. TERMS OF GUARANTEE ......................................................................................... 12

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H12
H11
S11
X11
X12
X14
X13 X15
01
F11
1. PREFACE
1.1. INTRODUCTION
Congratulations on having purchased this product. Properly installed Kemppi products should
prove to be productive machines requiring maintenance at only regular intervals.
This manual is arranged to give you a good understanding of the FastMig™ equipment and its safe
operation. It also contains maintenance information and technical specications. Read this manual
from front to back before installing, operating or maintaining the equipment for the rst time. For
further information on Kemppi products please contact us or your nearest Kemppi distributor.
The specications and designs presented in this manual are subject to change without prior
notice.
In this document, for danger to life or injury the following symbol is used:
Read the warning texts carefully and follow the instructions. Please also study the Operation safety
instructions and respect them when installing, operating and servicing the machine.
1.2. PRODUCT INTRODUCTION
FastMig™ KMS 400 MVU is a multi-operator and multi voltage power source designed for
demanding professional use. It is suitable for MMA and MIG welding in DC.
1.2.1. Operation control and connectors
F11 Fuse for connection for control table 6,3 A delayed
H11 Signal lamp I/O
H12 Warning lamp for thermal protection
S11 Main switch I/O
X11, Welding connection parallel
X13 Welding connection
X12 Earth connection
X14, Connection for control cable parallel
X15 Connection for control cable
01 Inlet of mains cable

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1.3. ACCESSORIES
1.3.1. Remote control devices
R10
R20
MIG-MAG remote control device with controls for wire feed and voltage, memory scales 1 … 5.
You can use control device also for control of MMA current.
1.3.2. Cables
FastMig™ KMS 400 MVU
16d Extension cable for remote control
20 Earth cable
21 MMA welding cable
R10, Remote control devices
R20
Wire feed adjustment,
electrode current adjustment
Control of MMA/TIG welding
current, reference scale 1 … 5.
Voltage adjustment

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1.4. OPERATION SAFETY
Please study these Operation safety instructions and respect them when installing, operating and
servicing the machine.
Welding arc and spatters
Welding arc hurts unprotected eyes. Be careful also with reecting arc ash. Welding arc and
spatter burn unprotected skin. Use safety gloves and protective clothing.
Danger for re or explosion
Pay attention to re safety regulations. Remove ammable or explosive materials from welding
place. Always ensure that you have sufcient re ghting equipment available where you are
welding. Be prepared for hazards in special welding jobs, eg. for the danger of re or explosion
when welding container type work pieces. Note! Fire can break out from sparks even several hours
after the welding work has been nished!
Mains voltage
Never take welding machine inside a work piece (eg. container or truck). Do not place welding
machine on a wet surface. Always check cables before operating the machine. Change damaged
cables without delay. Damaged cables may cause an injury or set out a re. Connection cable must
not be crushed, it must not touch sharp edges or hot work pieces.
Welding power circuit
Isolate yourself by using proper protective clothing, do not wear wet clothing. Never work on a
wet surface or use defect cables. Do not put the MIG-gun or welding cables on welding machine
or on other electric equipment. Do not press the MIG-gun switch, if the gun is not directed towards
a work piece.
Welding fumes
Take care that there is sufcient ventilation during welding. Take special safety precautions when
welding metal, which contain lead, cadmium, zinc, mercury or beryllium.
This equipment’s electromagnetic compatibility (EMC) is designed for use in an
industrial environment. ClassAequipment is not intended for use in residential location
where the electrical power is provided by the public low-voltage supply system.

6 – Fastmig™ Kms 400 mVU / 0647 © Kemppi oy
60º
max. 15º
2. INSTALLATION
2.1. SITING THE MACHINE
Site the machine on a stationary, horizontal, dry base in a position that does NOT allow
dust, dirt or metal particles to enter the machines cooling air ow.
2.2. CONNECTION TO THE MAINS SUPPLY
FastMig™ power sources are delivered equipped with 5 m mains cable without plug.
If local electricity regulations of operating country are stating otherwise, the mains cable should
be replaced in conformity with the local regulations.
Connection of the mains cable, mounting and change of the plug should only be carried out by a
competent electrician.
Remove the machine’s right side plate to enable the mounting of a mains cable.
KMS 400 MVU power source can be connected to the mains supply of 230 V 3~ or 400 V 3~.
Power source recognizes the mains voltage automatically. For fuse and cable sizes, see the technical
data in the end of this document.
If changing the mains cable take into consideration the following:
The cable is entered into the machine through the inlet ring on the rear panel of the machine and
fastened with a cable clamp (05). The phase conductors of the cable are coupled to connectors L1,
L2 and L3. The earth protection coloured green-yellow is coupled to connector.
If you are using 5-lead cable, do not connect neutral conductor.
rain water
– Preferably site the machine somewhat higher above
the oor level.
– Ensure that the front as well as the rear of the
machine there is at least 20 cm free distance to
allow good circulation of the cooling air through
the machine.
– Protect the machine against heavy rain and in hot
circumstances against direct sunshine. Ensure the
free circulation of the cooling air.
Degree of protection of machine IP23S allows at
its maximum the water spray coming in 60º angle
to hit machine’s outer covering.
See to that the machine is positioned away from the line
of particle spray, created by grinding tools etc.

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Sizes of the mains cables and fuse ratings for the KMS 400 MVU machine at 100 % duty cycle
are specied in the table below:
*) In cables of S type there is a protective grounding conductor coloured green-yellow.
2.3. WELDING AND EARTH CABLES
Recommended copper cables with cross-sectional area are as follows:
FastMig™ KMS 400 MVU 70 ... 90 mm²
In enclosed table are shown typical load capacities of rubber insulated copper cables, when ambient
temperature is 25 ºC and lead temperature is 85 ºC.
Do not overload welding cables due to voltage losses and heating.
Fasten the earth clamp of the return current cable carefully, preferably direct onto the piece to be
welded. The contact surface of the earth clamp should always be as large as possible.
Clean the fastening surface from paint and rust.
3. OPERATION CONTROL SWITCHES AND
POTENTIOMETERS AND THEIR USE
3.1. MAIN SWITCH I/O
When you turn the switch into I-position, pilot lamp H11 on the front face is illuminated and the
machine is ready for use.
Always turn the machine on and off with the mains switch, never use the mains plugs
as a switch.
3.2. PILOT LAMPS
The pilot lamps of the machine report the electric operation:
The green pilot lamp H11 when lit indicates that the machine is on and ready for use and it is
connected to the mains supply with the main switch in the I-position.
H12 indicates when lit that the thermal protection of the machine has been activated due to over
heating. The cooling fan will continue to run and cool the machine down and when the lamp is
off the machine is ready to weld.
3.3. OPERATION OF COOLING FAN
In FastMig™ -power sources there are two simultaneously operating fans.
– The fan is started for a moment when main switch is placed into position I.
– The fan will start during welding as the machine heats up and it will run for 1 to 10 minutes
after the welding has stopped.
Rated voltage Fuses, slow-blow Connection cable *) mm²
400 V 3~ 35 A H07RN-F 4G10 (10 mm²)
230 V 3~ 50 A H07RN-F 4G10 (10 mm²)
Cable Duty cycle ED Voltage loss / 10 m
100 % 60 % 30 %
50 mm² 285 A 370 A 520 A 0,35 V / 100 A
70 mm² 355 A 460 A 650 A 0,25 V / 100 A
95 mm² 430 A 560 A 790 A 0,18 V / 100 A

8 – Fastmig™ Kms 400 mVU / 0647 © Kemppi oy
4. MANUAL METAL ARC WELDING
The FastMig™ power source can be used in electrode welding by connecting a FastMig™
MSF 53, MSF 55 wire feeder to it. The power source can be made suitable for electrode welding
without a wire feeder by connecting an R10 or R20 remote control to the X14 or X15 terminal at the
back of the power source for welding current adjustment, and the welding power cable connected
to the power source’s (+) connector X11 or X12.
5. MAINTENANCE
The amount of use and the working environment should be taken into consideration when planning
the frequency of maintenance of the machine. Careful use and preventive maintenance will help
to ensure trouble-free operation.
5.1. CABLES
Check the condition of welding and connection cables daily. Do not use damaged cables.
Make sure that the mains cables in use are safe and according to laid down regulations.
The repair and mounting of a mains connection cable should be carried out only by an authorised
electrician.
5.2. POWER SOURCE
Note! Disconnect the plug of the machine from the mains socket and wait approx.
2 minutes (capacitor charge) before removing the cover plate.
Check at least every half year:
– Electric connectors of the machine - clean the oxidised parts and tighten the loosened
ones.
– Note! You must know correction tension torques before starting the reparation of the
joints.
– Clean the inner parts of the machine from dust and dirt e.g. with a soft brush and vacuum
cleaner. Also clean the ventilation net behind the front grate.
– Do not use compressed air, there is a risk that dirt is packed even more tightly into gaps of
cooling proles.
– Do not use pressure washing device.
– Only authorised electrician shall carry out repairs to the machines.
5.3. REGULAR MAINTENANCE
Kemppi Service Workshops make regular maintenance according to agreement.
The major points in the maintenance procedure are listed as follows:
– Cleaning of the machine
– Checking and maintenance of the welding tools
– Checking of connectors, switches and potentiometers
– Checking of electric connections
– Checking of mains cable and plug
– Damaged parts or parts in bad connection are replaced by new ones
– Maintenance testing. Operation and performance values of the machine are checked, and
adjusted when necessary by means of test equipment.

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6. OPERATION DISTURBANCES
In case of problems contact the Kemppi works in Lahti, Finland, or your local Kemppi dealer.
Check the maintenance objects before the machine is sent to the Service Workshop.
6.1. OPERATION OF THE OVERLOAD PROTECTION
Yellow pilot lamp H12 of thermal protection is lit when thermostat has operated due to overheating
of machine.
The thermostat of machine will operate, if machine is continuously loaded over rated values or
cooling air circulation is blocked.
Cooling fan cools down the machine and when the pilot lamp is not lit the machine is automatically
ready for welding.
6.2. CONTROL FUSES
Fuse F11, 6,3 A delayed, on the rear wall of machine is as protection for connection of auxiliary
devices X14-15.
Use same type and rating of fuse which is marked beside the fuse adapter. Damage
caused by a wrong type fuse is not covered by the guarantee.
6.3. UNDER- AND OVERVOLTAGES IN THE MAINS SUPPLY
Primary circuits of machine are protected against sudden, transient overvoltages.
Machine is designed to withstand 3 x 440 V or 3 x 230 voltage continuously (see technical data).
See to it that voltage is kept within admissible limits especially when mains supply is taken e.g.
from combustion engine generator.
If the mains has undervoltage or overvoltage machine control stops to operate automatically.
6.4. LOSS OF A PHASE IN THE MAINS SUPPLY
Loss of a phase causes noticeable poorer welding properties than normally or the machine doesn’t
get started at all. Loss of a phase can be due to following:
– blowing of mains supply fuse
– defective mains cable
– bad connection of mains connection cable on terminal block or plug of machine
7. DISPOSAL OF THE MACHINE
Do not dispose of electrical equipment together 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 returned to an
environmentally compatible recycling facility. As the owner of the equipment, you should
get information on approved collection systems from our local representative.
By applying this European Directive you will improve the environment and human
health!

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8. ORDERING NUMBERS
FastMig™ KMS 400 MVU 605400003
SF 51 200 mm, LED 6085100
SF 52 200 mm, LED 6085200
SF 53 300 mm, LED 6085300
SF 54 300 mm, LED 6085400
Return current cable 5 m, 50 mm² 6184511
Return current cable 5 m, 70 mm² 6184711
Cable for MMA welding 5 m, 50 mm² 6184501
Cable for MMA welding 5 m, 70 mm² 6184701
R10 6185409
Remote controlled interconnecting cable 10 m 6185481
Transport unit PM 500 6185291
Gun holder GH 30 6256030