Kemppi M 420MV FastMig Operating Manual Download Page 11

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© Kemppi Oy / 1515

EN

5. 

MAINTENANCE

When considering and planning routine maintenance, please consider the frequency of 

machine use and the working environment. 
Correct operation of the machine and regular maintenance will help you avoid unnecessary 

downtime and equipment failure.

NOTE!  

Disconnect the machine from the mains before handling the electrical cables. 

5.1  Daily maintenance

•  Check the overall condition of the welding gun. Remove welding spatter from the 

contact tip and clean the gas nozzle. Replace worn or damaged parts. Only use original 

Kemppi spare parts.

•  Check the condition and connection of the welding circuit components: welding gun, 

earth return cable and clamp, sockets and connectors.

•  Check the condition of the feed rolls, needle bearings and shafts. Clean and lubricate 

bearings and shafts with a small quantity of light machine oil if necessary. Assemble, 

adjust and test function. 

•  Check that the feed rolls are suitable for the filler wire you are using, and that their 

pressure adjustment is correct.

5.2  Periodic maintenance

NOTE!  

Periodic maintenance should only be carried out by a suitably qualified person. Disconnect 

the plug of the machine from the mains socket and wait about 2 minutes (capacitor charge) before 

removing the cover plate.

Check at least every half year:

•  Electric connectors of the machine – clean any oxidized parts and tighten loose 

connections.

NOTE!  

You must know the correct tension torques values before starting the reparation of the loose 

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 grill.
Do not use compressed air, there is a risk that the dirt will compact even more tightly into 

gaps of cooling profiles.
Do not use pressure washing devices.
Only an authorized trained electrician should carry out repairs to Kemppi machines.

5.3  Service Workshop maintenance

Kemppi Service Workshops complete maintenance according to their Kemppi service 

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 condition are replaced by new ones

•  Maintenance testing.

•  Operation and performance values of the machine are checked, and when necessary 

adjusted by means of software and test equipment.

Software loading

•  Kemppi Service Workshops can also test and load firmware and welding software.

Summary of Contents for M 420MV FastMig

Page 1: ...FastMig M 420MV Operating manual Brugsanvisning Manual de instrucciones Manual de utiliza o EN ES PT NO...

Page 2: ......

Page 3: ...OPERATING MANUAL English...

Page 4: ...achine 6 2 2 Distribution network 6 2 3 Connection to the mains supply 7 2 4 Welding and earth return cables 7 3 Operation controls 8 3 1 Main switch I O 8 3 2 Pilot lamps 8 3 3 Operation of cooling f...

Page 5: ...more information on Kemppi products contact Kemppi Oy consult an authorised Kemppi dealer or visit the Kemppi web site at www kemppi com The specifications presented in this manual are subject to cha...

Page 6: ...Warning lamp for thermal protection 4 Main switch 5 Welding connection 6 Earth connection 7 Control cable connection 8 Inlet of mains cable 1 3 Accessories 1 3 1 Remote control devices R10 1 1 Contro...

Page 7: ...s are correctly fastened Loose connectors can impair welding performance and damage connectors Liquid cooled system FastMig power source MXF FastCool 10 1 4 8 2 3 9 5 6 7 10 1 MXF wire feed unit 2 Fas...

Page 8: ...e against heavy rain and direct sunshine NOTE The machine should not be operated in the rain as the protection class of the machine IP23S allows for outside preserving and storage only NOTE Never aim...

Page 9: ...OTE If you are using 5 lead cable do not connect neutral conductor Sizes of the mains cables and fuse ratings for the machine at 100 duty cycle are specified in the table below Rated voltage Fuses slo...

Page 10: ...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...

Page 11: ...t and wait about 2 minutes capacitor charge before removing the cover plate Check at least every half year Electric connectors of the machine clean any oxidized parts and tighten loose connections NOT...

Page 12: ...The machine is designed to withstand 3 x 440 V voltage continuously Ensure that voltage is kept within this permissible limit especially when the mains supply is provided by a combustion engine gener...

Page 13: ...MXF 63 To be used with MR panels 6152300 Panels for wire feeders FastMig MR 200 6136100 FastMig MR 300 6136200 FastMig MS 200 6136300 FastMig MS 300 6136400 Accessories Return current cable 5 m 50 mm...

Page 14: ...V 44V Open circuit voltage MMA U0 48 53V Uav 50V U0 48 53V Uav 50V MIG MAG U0 60 65V U0 53 58V Idle power 25W 25W Efficiency at max current 87 87 Power factor at max current 0 85 0 82 Operating temper...

Page 15: ......

Page 16: ...5428 LANGG NS DEUTSCHLAND Tel 49 6 403 7792 0 Telefax 49 6 403 779 79 74 sales de kemppi com KEMPPI SP KA Z O O Ul Borzymowska 32 03 565WARSZAWA POLAND Tel 48 22 7816162 Telefax 48 22 7816505 info pl...

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