Speedaire SDR8CG00 Manuel D'utilisation Et De Pièces page 22

TROUBLESHOOTING GUIDE WELDER
Symptom Possible Cause(s)
Welder runs but does
1. Inadequate current at electrode
not weld
2. Poor connections at welder
3. Open, shorted, or incorrect wiring
4. Faulty capacitor
5. Open or shorted field windings
6. Open diodes
Welder gives trickle
1. Accidental contact with work piece
shocks
2. Current leakage caused by moist clothing or
work area
Arc difficult to strike 1. Wrong type of electrode.
2. Electrode diameter too large
3. Work piece not properly grounded
4. Engine speed is too slow
★ These diagnostic and repair procedures should be performed by an authorized service center.
TROUBLESHOOTING GUIDE WELDS
Symptom
Bead is intermittently
too thin or too thick
Ragged depressions at edge of
weld
Weld bead does not penetrate
base metal
Electrode sticks to workpiece
Electrodes sputter and stick
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Possible Cause(s)
1. Inconsistent travel speed
2. Output amp setting incorrect
1. Travel speed too fast
2. Arc length too short
3. Output amp setting too high
1. Inconsistent travel speed
2. Output amp setting too low
3. Electrode diameter too large
1. Arc length short
2. Amp setting low
3. Incorrect electrode
Damp electrodes
Corrective Action
1. Check work clamp, cable and connection to work piece.
Check electrode cable and clamp
2. Check all welder external connections
3. Referring to the wiring diagram, clean and reconnect all
wiring ★
4. Replace capacitor ★
5. Test winding resistance, replace field winding if necessary ★
6. Test diodes, replace if necessary ★
1. Avoid contact with work piece
2. Make sure clothing and work area are dry
1. Verify that electrode is for alternating current (AC)
2. Use smaller diameter electrode
3. Verify proper grounding (No paint, varnish or corrosion)
4. Adjust engine speed ★
Corrective Action
1. Carefully watch and control the width of the molten weld bead
2. Adjust output amp setting or change to smaller diameter
electrode
1. Watch orange molten weld puddle and control bead width
2. Practice running electrode across workpiece with welder OFF
3. Reduce output amp setting
1. Decrease and maintain constant travel speed
2. Increase output amp setting
3. Change to smaller diameter electrode
1. Lift electrode to correct arc length as soon as arc is struck
2. Increase amp setting or change to smaller diameter electrode
3. Verify electrode is suitable for 62.5 V open circuit voltage
Use dry electrodes and store in dry location