Bedienungsanleitung Kemppi FastMig X 350MV (Seite 25 von 30) (Englisch)

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6. OPERATION DISTURBANCES

Should you experience a malfunction from your machine, please consult the basic

troubleshooting text above rst, and complete some basic checks.

If the machine malfunction cannot be corrected with these measures, contact your Kemppi

maintenance service workshop.

Operation of the overload protection

Yellow thermal protection lamp is lit when the thermostat is operating due to loading beyond

the stated duty cycle.

The thermostat will operate, if machine is continuously loaded over rated values or cooling air

circulation is blocked.

Internal fans will cool the machine, and when the pilot lamp is not lit the machine is

automatically ready for welding.

Control fuses

Fuse, 6.3 A delayed, on the rear wall of machine provides protection for auxiliary devices.

Use the same type and rating of fuse as marked beside the fuse adapter. Damage caused by

incorrect fuse selection is not covered by the guarantee.

Under and over voltages in the mains supply

Primary circuits of the machine are protected against sudden, transient overvoltages. 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 generator. If the mains has under voltage or overvoltage machine control stops

operation automatically.

Loss of a phase in the mains supply

Loss of a mains power phase causes noticeably poor welding properties. In some cases the

machine won't start at all. Loss of a phase can be due to following:

• Blowing of mains supply fuse

• Defective mains cable

• Bad connection of mains power cable on machine terminal block or plug of machine.

7. 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.

7.1 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 ller wire you are using, and that their

pressure adjustment is correct.

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