TROUbLESHOOTING | ||
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PRObLEMS
(SYMPTOMS)
POSSIbLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Welder welds at max. only no con- trol.
Diodes or SCR’s | on heat sink Determine cause if possible and |
assemblies shorted. | replace shorted device. |
Shorted or grounded current controll Replace rheostat. rheostat.
Output
Free wheeling diode open or discon- Replace or reconnect. nected.
P.C. board components failed. | Determine cause if possible and |
| replace P.C. board. |
Contacts chatter.
Low supply line voltage.
Check with Power Company.
Faulty contactor.
Repair or replace.
CAUTION
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.
IDEALARC®