Lincoln Electric SAE-300 HE Service Manual page 25

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The welding arc frequently
"pops out". Welding seems
otherwise normal and auxiliary
output voltage appears normal.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the
Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Fine Current / OCV Control
rheostat may be set too low.
2. If a remote control is being
used, try switching to local
control. The remote control
unit may be faulty.
3. Check welding cables for
damaged or poor connections.
4. Welding cable may be
excessively long, too small or
coiled. Try using a set of short
test cables of adequate size.
SAE-300® HE Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Perform the Brush And Slip
Ring Service Procedure (Exciter
/ Auxiliary Power Alternator).
2. Perform the Welding
Generator Brush And
Commutator Inspection And
Service Procedure.
3. Perform the Coarse Current
Control Unit (Variable Reactor)
Inspection And Service
Procedure.
4. Perform the Exciter Rotor
Voltage Test Procedure.
5. Perform the Shunt Field
Circuit Voltage Test Procedure.
6. Check that the rocker is
aligned to the factory drill mark
and perform the Rocker
Adjustment Procedure, if
necessary.
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