Lincoln Electric IM770 IDEALARC CV-525 - Manual (Page 27)

CV-525
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
E-2 TROUBLESHOOTING E-2
Observe all Safety Guidelines detailed througout this manual
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Input contactor (CR1) chatters.
Machine input contactor does not
operate.
Machine input contactor operates,
but no output when trying to weld.
Output control not functioning on the
machine.
1. Faulty input contactor (CR1).
2. Low line voltage.
1. Supply line fuse blown.
2. Contactor power circuit dead.
3. Broken power lead.
4. Wrong input voltage.
5. Open input contactor coil.
6. POWER “I/O” switch (S1) not
closing.
1. Circuit between #2 (C ) and #4
(D) is not being closed.
2. Electrode or work lead loose or
broken.
3. Open main transformer (T1) pri-
mary or secondary circuit.
4. Defective Control PC Board.
5. Primary or secondary thermostats
open.
1. Output Control “Local-Remote”
switch (S2) in wrong position.
2. Faulty Output Control switch.
3. Faulty Output Control potentiometer.
4. Leads or connections open in
control circuit.
5. Faulty Control PC Board.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.