Lincoln Electric IM570 IDEALARC CV-655 - Manual (Page 26)

E-3 TROUBLESHOOTING E-3
CV-655
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)
PPOSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Machine has maximum output, but
no control.
Machine has minimum output and no
control.
Machine does not have maximum
output.
Poor arc striking with semiautomatic
or automatic wire feeders.
1. Check the Local/Remote output
switch (SW3) and associated
leads. See wiring diagram.
2. Make sure the remote control
leads #75, #76 and /or #77 are
NOT grounded to the negative
welding output.
3. The output control potentiometer
may be faulty.
4. The control board or control
board transformer (T3) may be
faulty.
1. The remote control leads #75,
#76 and/or #77 may be grounded
to the positive welding output.
1. Make sure the correct three-
phase input is applied to the
CV655 machine.
2. The output control potentiometer
may be faulty.
3. The Local/Remote switch (SW3)
may be faulty.
4. The control or firing boards may
be faulty. See PC board LED
information.
1. Make sure the welding cables
and connections are secure.
2. Check for correct welding porce-
dures.
If all recommended possible areas of
misadjustments have been checked
and the problem persists, contact
your local Lincoln Authorized
Field Service Facility.