Welding Problems; Electrical Failures - Century 12745 Operator's Manual

INVERTER ARC 230
Observe all Safety Guidelines detailed throughout this manual
PROBLEM
(SYMPTOMS)
Excessive spatter
Craters
Inclusions
Insufficient penetration
Electrode Sticking
Porosity
Cracks
Machine fails to come on
(Power LED off)
Thermal overload
(Thermal LED on)
The fan works, but the
output current is unstable
and can not be controlled by
the potentiometer while
welding is carried out.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
POSSIBLE AREAS OF
MISADJUSTMENT(S)

WELDING PROBLEMS

1. Improper welding polarity.
2. Long Arc Length.
3. High Current.
1. Fast movement of the electrode away from
the work piece.
1. Poor cleanliness.
2. Poor distribution of the welding passes.
1. High travel speed.
2. Welding current is too low.
1. Arc length is too short.
2. Welding current is too low.
1. Humidity in the electrode.
2. Long arc length.
1. Weld current is set too high.
2. Dirty materials.
3. Hydrogen in the weld due to moisture.

ELECTRICAL FAILURES

1. No Input Voltage.
2. Faulty supply plug or cable.
3. Supply fuse blown or breaker tripped.
1. Unit has been operated beyond its capacity
rating.
2. Airflow through machine is restricted or
fan has failed.
1. Check the output current potentiometer,
and replace it if necessary.
2. Verify output cables are attached to the
welder and tightly connected
RECOMMENDED COURSE OF ACTION
1. Make sure the electrode holder is plugged into the
positive "+" output terminal.
2. Move the electrode closer into the weld joint.
3. Turn the output knob down.
1. Maintain a steady consistent arc length
1. Clean work piece with wire brush prior to welding.
2. Consult a welding guide for proper weld bead
placement.
1. Travel at a slower speed.
2. Adjust welding output higher.
1. Move the electrode further away from the weld joint.
2. Turn the output knob up.
1. Store welding electrodes in a warm dry place.
2. Move the electrode closer into the weld joint.
1. Turn the output knob down.
2. Clean work piece with wire brush prior to welding.
3. Store welding electrodes in a warm dry place.
If all recommended possible areas of misadjustment
have been checked and the problem persists, Contact
your local Authorized Field Service Facility.
F-1
TROUBLESHOOTING