Manual Kemppi A3 MIG Power Source 400 (page 26 of 32) (English)

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A3 MIG Welder© Kemppi Oy 2018 1826

OPERATING MANUAL

5. TROUBLESHOOTING

5.1 Typical problems

The problems listed, and the possible causes are not

denitive, but serve to suggest some standard and typical

situations that may present during normal environmental

use when using the MIG/MAG process with the A3 MIG

Welder.

Problem Check the following

Machine won’t work • Check mains plug is connected correctly

• Check mains power distribution is switched on

• Check the mains fuse and/or circuit breaker

• Check power source 0/1 switch is ON (1)

• Check interconnection cable set and connectors between the power source

and wire feed unit are correctly fastened. See the manual schematic

• Check earth return cable is connected

• Check control panels are switched on.

Dirty, poor quality weld • Check shielding gas supply

• Check and set gas ow rate

• Check gas type for application

• Check gun/electrode polarity

• Check correct welding program selected

• Check correct channel number selected on wire feeder control panel

• Check power supply – Phase down?

Variable welding

performance

• Check wire feed mechanism is correctly adjusted

• Check correct drive rolls are tted

• Check wire spool overrun tension is correctly adjusted

• Check gun liner is not blocked, replace if necessary

• Check correct gun liner is tted for the ller wire size and type

• Check contact tip for size, type and wear

• Check gun is not over heating in application

• Check cable connections and earth return clamp

• Check welding parameter settings.

Filler wire won’t feed • Check that pressure arms are closed and adjusted in wire feed mechanism

• Check welding gun switch function

• Check Euro gun collar is correctly fastened

• Check gun liner is not blocked

• Check contact tip, size, type, wear

• Check and try alternative gun.

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Kemppi A3 MIG Power Source 400 Manual

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