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Check Ground connection. Make sure that the ground is on a freshly 
cleaned surface and close to the welding area. It is suggested to
weld toward the ground connection

Based on the material welding and size/material of the electrode,
pick an appropriate amperage to perform the desired weld.

Move electrode so that it is contacting the weld puddle and feed rod
into the puddle as needed.

Make sure that Electrodes are clean and dry before use.

Clean base metal of any oil, debris, coatings, or moisture.

Clean base metal of any oil, debris, coatings, or moisture. If base
metal is cold rolled steel make sure to remove any mill scale.

Move electrode so that it is contacting the weld puddle and feed rod
into the puddle as needed.

Check Ground connection. Make sure that the ground is on a freshly
cleaned surface and close to the welding area. It is suggested to
weld toward the ground connection.

Based on the material welding & size/material of the electrode, 
pick an appropriate amperage to perform the desired weld.

Incomplete Circuit

Contaminated Base Metal

Electrode too far from welding 

surface

Amperage Too Low

Incomplete Circuit

Contaminated Electrode Rod

Contaminated Base Metal

Electrode too far from welding 
surface

Amperage Too Low

Difficulty 

Starting Arc

Arc Wander

Difficulty 

Holding Arc

PROBLEM

Clean base metal of any oil, debris, coatings, or moisture. If base 
metal is cold rolled steel make sure to remove any mill scale.

To reduce heat it is best to spread the welding out around the area. 
This can be done by using stitch welding techniques, alternating 
sides, and/or taking your time and allowing the pieces to cool 
between passes.

The angle of the electrode should be at 45° and drug away from the 
weld arc. Failing to do so may cause poor weld appearance.

Reduce heat & allow more time between passes.

Use correct filler wire type & diameter for the joint being welded.

Clamp work piece tightly & weld while clamps are in place.

Add more tack welds until rigidity and stiffness is developed.

Make sure that Electrodes are clean and dry before use.

Clean base metal making sure to remove any oil, debris, coatings, 
or moisture.

Make sure that Electrodes are clean and dry before use.

Contaminated Electrode Rod

Contaminated Base Metal

Incorrect positioning

Too much heat in material

Base Metal is absorbing too 

much heat

Preheat base metal (consult welding codes for requirements)

Incorrect Filler Wire

Insufficient Clamping

Insufficient Tack Welds

Too Much Heat in Material

Contaminated Electrode Rod

Contaminated base metal

Contamination 

in weld bead

Poor Weld 

Appearance

Weld Bead is 

Cracking

Material is 

Warping

Porosity in 

weld bead

TROUBLESHOOTING

CAUSE

CORRECTION

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Summary of Contents for ARC-400Q

Page 1: ...USER S MANUAL Note Please read this user s manual carefully before using this product...

Page 2: ...ut off however the fan will continue run ning to cool the overheated components When a safe temperature has been reached the Welder will auto matically switch the welder output back on To increase the...

Page 3: ...eration Always attach the ground clamp to the piece to be welded and as close to the weld area as possible This will give the least resistance and best weld Electric welding produces sparks which can...

Page 4: ...ing equipment Never touch welded work surface torch tip or nozzle until they have com pletely cooled Grinding and sanding will eject metal chips dust debris and sparks at high velocity To pre vent eye...

Page 5: ...er Switch is set to the ON position FIG B Power Indicator LED Illuminates Amber when the unit has reached the maximum internal component temperature FIG B This oc curs when the Duty Cycle has been exc...

Page 6: ...d turn 180 clockwise to lock in place 4 Attach the Ground Clamp to the workpiece as close to the welding area as possible To ensure good ground clean the grounded area of any rust grease oils or paint...

Page 7: ...ing Rod into the workpiece joint at a 15 angle 3 Lift rod from workpiece when weld bead is completed 4 Turn off Welder power switch 5 Set the Electrode or Stick Holder on a safe non ammable surface 6...

Page 8: ...ow Dif culty Starting Arc Arc Wander Dif culty Holding Arc PROBLEM Clean base metal of any oil debris coatings or moisture If base metal is cold rolled steel make sure to remove any mill scale To redu...

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