Specifications

CD-312
PRO WELD
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
3. Welder turns on but A. Ground cable connections Check for continuity
does not operate not complete.
*B. Broken gun control cable Check continuity between
or loose wire c onnection pins on control plug while
in the plug. Shorted or trigger is depressed.
open trigger swit ch. Should read continuity.
*C. Faulty printed circuit Replace with new PC
board. Board.
D. Sh orted weld SCR. Check with ohmmeter
(should not show continuity
in either direction). Replace
rectifier module if shorted.
4. Weld is excessively hot A. Shorted charge SCR. Check with ohmmeter
regardless of vo ltage ( should not show continuity
setting. In either direction). Replace
if shorted.
*B. Faulty printed circuit Replace with new PC
board. Board.
C. Open voltage Replace defective voltage
potentiometer. Potentiometer.
5. Poor and erratic A. Improper gun setup. Check applicable gun setup
welding. Instruction page.
B. Improper grounding or Check applicable cable setup
cable setup or incorrec t Instruction page.
polarity.
C. Weld cables are coiled. Straighten out cables.
D. Incorrect voltag e setting. Adjust as necessary.
E. Studs or pins not Adjust legs as necessary.
perpendicular to work Re place defective legs.
surface.
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