Kemppi Evo 150 - Manual (Page 14)

EN
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 flashing.
• Establish cause of VRD lock down. Reset the machine via the main on/off switch.
• If the machine will not re-set, contact your Kemppi service agent
Poor welding results. Several factors affect 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 flow 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 off.
Allow the unit to cool and the machine will soon automatically reset and allow
welding to restart.
• Ensure that cooling air has unrestricted flow.
• If the machine’s duty cycle has been exceeded, wait for indicator to turn off.
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 150, Evo 150VRD
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