E-2

 

TROUBLESHOOTING

 

E-2

 

 

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE

 

RECOMMENDED

 

 

(SYMPTOMS)

 

CAUSE

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

WELDING PROBLEMS

 

 

 

 

 

 

 

 

 

Excessive spatter

1.

Improper welding polarity.

1.

Make sure the electrode holder is

 

 

 

 

 

 

plugged into the positive “+” out-

 

 

 

 

 

 

put terminal.

 

 

 

2.

Long Arc Length.

2.

Move the electrode closer into the

 

 

 

 

 

 

weld joint.

 

 

 

3.

High Current.

3.

Turn the output knob down.

 

 

 

 

 

 

 

Craters

1.

Fast movement of the electrode

1.

Maintain a steady consistent arc

 

 

 

 

away from the work piece.

 

length

 

 

 

 

 

 

 

Inclusions

1.

Poor cleanliness.

1.

Clean work piece with wire brush

 

 

 

 

 

 

prior to welding.

 

 

 

2.

Poor distribution of the welding

2.

Consult a welding guide for proper

 

 

 

 

passes.

 

weld bead placement.

 

 

 

 

 

 

 

Insufficient penetration

1.

High travel speed.

1.

Travel at a slower speed.

 

 

 

2.

Welding current is too low.

2. Adjust welding output higher.

 

 

 

 

 

 

Electrode Sticking

1. Arc length is too short.

1.

Move the electrode further away

 

 

 

 

 

 

from the weld joint.

 

 

 

2.

Welding current is too low.

2.

Turn the output knob up.

 

 

 

 

 

 

 

Porosity

1.

Humidity in the electrode.

1.

Store welding electrodes in a

 

 

 

 

 

 

warm dry place.

 

 

 

2.

Long arc length.

2.

Move the electrode closer into the

 

 

 

 

 

 

weld joint.

 

 

 

 

 

 

 

Cracks

1.

Weld current is set too high.

1.

Turn the output knob down.

 

 

 

2.

Dirty materials.

2.

Clean work piece with wire brush

 

 

 

 

 

 

prior to welding.

 

 

 

3.

Hydrogen in the weld due to mois-

3.

Store welding electrodes in a

 

 

 

 

ture.

 

warm dry place.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

INVERTER ARC™ 120

Page 19
Image 19
Century IM998 manual Recommended Symptoms, Course of Action