Lincoln Electric IM318 IDEALARC DC1500 - Manual (Page 22)

E-6 P.C. BOARD TROUBLESHOOTING GUIDE E-6
IDEALARC ® DC-1500
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
OUTLINE FOR DC-1500 TROUBLESHOOTING GUIDE
NO WELDER OUTPUT MACHINE HAS OUTPUT BUT ERRATIC WELDING
(INPUT CONTACTOR “ON” TERMINALS 2 AND 4 CLOSED) TRIPS OFF IMMEDIATELY
CHECK PROCEDURE
CHECK CONTROL BOARD CHECK FOR SHORT
LED L5 BETWEEN ELECTRODE AND CHECK MODE SWITCH FOR
WORK LEADS, REMOVE PROPER POSITION FOR
EXTERNAL LEADS FROM PROCESS BEING USED
IF OFF IF ON THE OUTPUT TERMINALS
CHECK LED’S
CHECK LED L1 CHECK “FIRING” BOARD IF TROUBLE STILL L4, L5, L6
LED’S PERSISTS, FOR EQUAL
IF OFF IF ON CHECK LED L3 ON BRILLIANCY
ALL “CONTROL/FAULT
CHECK AC REPLACE NINE LIGHTS PROTECTION” BOARD IF LIGHTS ARE NOT ALL
INPUT TO “CONTROL/ SHOULD APPROXIMATELY EQUAL
“CONTROL/ FAULT BE ON IF LIGHT GOES ON,THEN BRIGHT, REPLACE
FAULT PROTECTION” QUICKLY OUT WHEN START FIRING P.C. BOARD
PROTECTION” BOARD IF YES BUTTON IS PRESSED,
BOARD IF NO “CONTROL/FAULT
POSSIBLE CHECK GATE PROTECTION” BOARD IS
DEFECTIVE T7 LEAD CHECK DEFECTIVE AND SHOULD
TRANSFORMER CONNECTIONS LED’S BE REPLACED
TO SCR’S L7, L8, L9
IF ONE IF ON AND
OR MORE OTHER LIGHTS
ARE OUT ARE OUT
CHECK AC REPLACE
INPUT TO FIRING
BOARD, BOARD
203-204, 205-206
207-208
POSSIBLE
DEFECTIVE
TRANSFORMERS
T2, T3, OR T4
• Have an electrician install and
service this equipment.
• Turn the input power off at the
fuse box before working on
equipment.
• Do not touch electrically hot parts. ELECTRIC SHOCK
can kill.
WARNING
TABLE E.1