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E-3
PROBLEMS
(SYMPTOMS)
Welder welds at max. only no con-
trol.
Contacts chatter.
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
POSSIBLE
CAUSE
Diodes or SCRʼs on heat sink
assemblies shorted.
Shorted or grounded current controll
rheostat.
Output By-Pass Capacitors open or
disconnected.
Free wheeling diode open or discon-
nected.
P.C. board components failed.
1. Low supply line voltage. Check
with Power Company.
Faulty contactor.
CAUTION
IDEALARC
AC-1200
®
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
E-3
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