If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).

PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

FUNCTION PROBLEMS

The display is not functioning prop-
erly.

1. Refer to the Operation Section

of this manual for normal opera-
tion characteristics.

2. Check for proper current and

voltage calibration.

1. Check for loose or faulty plug

connections between the
Display board and the control
board. See the wiring diagram.

2. The display board may be faulty.

3. The control board may be faulty.

A fault or error code is displayed.

1. See the Fault Code

Explanations.

1. See Fault Code Explanations.

For no apparent reason the welding
characteristics have change.

1. Check the welding cables for

loose or faulty connection.

2. Make sure the machine’s mode

and output are set correctly for
the process being used. (CV,
CC,TIG etc.)

3. If Mig welding make sure the

shielding gas and wire speed are
correct for the process being
used.

4. Check for proper current and

voltage calibration.

1. Perform

the

Voltage and

Current Calibration
Procedure.

2. Perform

the

Current

Transducer Test.

3. Perform the Output Diode

Module Test

4. The control board may be faulty.

5. The advanced process panel (If

used) may be faulty.

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