Bedienungsanleitung Kemppi Minarc Evo 180 (Seite 14 von 18) (Englisch)

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4. MAINTENANCE

NOTE! Be careful when handling electrical cables!

In maintaining the unit, take into consideration the rate of use and the environment it is

used in. When the unit is used properly and serviced regularly, you will avoid unnecessary

disturbances in use and production.

4.1 Daily maintenance

Perform the following maintenance daily:

• Clean the electrode holder and TIG torch’s gas nozzle. Replace damaged or worn parts.

• Check TIG torch’s electrode. Replace or sharpen, if necessary.

• Check the tightness of welding cable and earth return cable connections.

• Check the condition of mains lead and welding cables, and replace damaged cables.

• See that there is enough space around the unit for ventilation.

4.2 Troubleshooting

Problem Cause

The main switch indicator will not

light up.

• No electricity connected to the machine

• Check the mains supply fuses.

• Check the mains cable and plug.

The machine will not weld. • Check power supply status and connections.

• VRD ’Lock down’ state is active. OCV level has exceeded the set limit and welding is

prevented.

• VRD light is solid RED, and GREEN main power light is ashing.

• Establish cause of VRD lock down. Reset the machine via the main on/o switch.

• If the machine will not re-set, contact your Kemppi service agent

Poor welding results. Several factors aect the welding quality.

• Ensure that the welding current selected is adequate for the selected electrode type

and size.

• Ensure the cable connections are correct and secure.

• Ensure the process selection is correct.

• Check that the earth return clamp connection area is clean and that the cable and

clamp are not damaged.

• For TIG welding, check that the shielding gas ow is switched on and set correctly.

Poor ignition and arc quality in TIG welding may be a result of a poorly prepared

tungsten electrode. Always maintain and grind a point on the TIG torch electrode tip

before welding.

Overheating indicator is illuminated. Normally, this indicates that the device has reached its maximum designed operating

temperature. The thermostat has become active, switching the welding power o.

Allow the unit to cool and the machine will soon automatically reset and allow

welding to restart.

• Ensure that cooling air has unrestricted ow.

• If the machine’s duty cycle has been exceeded, wait for indicator to turn o.

In certain circumstances, this light may also indicate irregularity in the supply voltage.

Too low or high supply voltage.

If the machine’s malfunction is not eliminated with the above measures, contact Kemppi

service.

Minarc Evo 180

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