Lincoln Electric IM770 IDEALARC CV-525 - Manual (Page 28)

E-3 TROUBLESHOOTING E-3
CV-525
Observe all Safety Guidelines detailed througout 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
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Machine has low output and no con-
trol.
Machine does not have maximum
output.
Machine will not shut off.
Variable or sluggish welding arc.
1. Output Control “Local-Remote”
switch (S2) in wrong position.
2. Output Control switch faulty.
3. Open in feedback circuitry.
4. Faulty Control PC Board.
5. Output control potentiometer cir-
cuit open (Lead 75).
1. One input fuse blown.
2. One phase of main transformer
open.
3. Faulty Control PC Board.
4. Output control potentiometer
defective.
5. Output control potentiometer
Leads 210, 211, or 75 open.
1. Input contactor contacts frozen.
2. Defective Power “I/O”
switch, (S1).
1. Poor work or electrode connec-
tion.
2. Welding leads too small.
3. Welding current or voltage too
low.
4. Defective main SCR bridge.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.