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

OUTPUT PROBLEMS

Major physical or electrical dam-
age is evident when the sheet
metal cover is removed.

1. Contact your local authorized

Lincoln Electric Field Service
Facility for technical assis
tance.

1. Contact the Lincoln Electric

Service Department,

1-800-833-9353(WELD).

The machine is dead—no out-
put—no displays.

1. Make sure the input line/

breaker switch is in the ON
position.

2. Check the main input line fuses.

If open , replace.

3. Check the 2 amp circuit breaker

(CB2). Reset if tripped.

4. Make sure the reconnect switch

and jumper lead is configured
correctly for the applied input
voltage.

5. If the machine is being operat-

ed with single phase input volt-
age make sure the red lead is
not connected. See the
Installation Section.

1. Perform the Auxiliary

Transformer Test.

2. Perform the Power Board Test.

3. The control rectifier and or

associated filter capacitor (C5)
may be faulty. Check and
replace as necessary.

4. Perform The SPI Cable

Resistance and Voltage Test.

5. The Control Board may be

faulty.

The main input fuses (or breaker)
repeatedly fail.

1. Make certain the fuses or

breakers are sized properly.

2. Make sure the reconnect switch

and jumper lead is configured
correctly for the applied input
voltage.

3. The welding procedure may be

drawing too much input
current or the duty cycle may
be too high. Reduce the
welding current and /or reduce
the duty cycle.

1. Check the reconnect switches

and associated wiring. See the
wiring diagram.

2. Perform the Input Rectifier

Test.

3. Perform the Main Switch

Board Test.

4. Perform the Output Diode

Module Test.

5. The Input Filter Capacitors

may be faulty. Check, and if
any are faulty replace all four.

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