Kemppi M 420MV - Manual (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.