Lincoln Electric SAE -500 Operator's Manual page 25

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PROBLEMS
(SYMPTOMS)
Welder runs but fails to generate
current.
Welding arc is loud and spatters
excessively.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local
Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
FUNCTION PROBLEMS
1. Generator or exciter brushes may
be loose or missing.
2. Exciter may not be operating.
3. Field circuit of generator or exciter
may be open.
4. Polarity reversing switch may be
in the neutral position.
5. Exciter may have lost excitation.
1. Series field circuit may be open
circuited.
2. Current setting may be too high.
3. Polarity may be wrong.
CAUSE
1. Be sure that all brushes bear on
2. Check exciter output voltage with
3. Check for open circuits in rheo-
4. Put handle in positive or negative
5. Check components and continuity
1. Check circuit with ringer or volt-
2. Check setting and current output
3. Check polarity. Try reversing
CAUTION
SAE-500™
RECOMMENDED
COURSE OF ACTION
the commutator and have proper
spring tension.
voltmeter or lamp.
stat, field leads and field coils.
Also check resistors.
position.
in flashing circuit.
meter.
with ammeter.
polarity or try an electrode of the
opposite polarity.
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