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E-6
PROBLEMS
(SYMPTOMS)
10. Speed does not change when
weld current flows. Status lights
are solid green.
11. Voltmeter and/or ammeter do
not function properly even
though status lights are solid
green. Welding may vary from
normal procedure.
12. Purge switch on feed head does
not activate solenoid but trigger
closure in MIG or pulse modes
does.
13. Cold feed switch does not acti-
vate the motor but trigger does
in MIG or Pulse modes. LEDs
are solid green on both CB and
feed head boards.
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.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
a. Run-in and weld speeds are set to
the same value.
b. Possible problem with current
sensor electronics in power
source. Check power source man-
ual to trouble shoot current sensor
electronics.
a. 67 and/or 21 voltage sense leads
may have intermittent or poor con-
nections. Check.
b. Possible problem with power
source electronics.
a. Defective gas purge switch or
feed head board. Check continuity
with gas purge switch held down
across J1 pins 3 and 5. Release
purge switch and note there
should be no continuity now. If
either of these fail, the problem is
either in the gas purge switch or
harnessing. If no failure, replace
feed head board.
a. Defective cold feed switch or feed
head PC board. Check continuity
with cold feed switch held up
across plug pins 3 and 4 of J1.
Release the cold inch switch and
note that there should be no conti-
nuity now. If either of these fail,
the problem is either in the purge
switch or harnessing. If continuity
O.K., replace feed head board.
POWER FEED 10 DUAL
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
CAUTION
RECOMMENDED
COURSE OF ACTION
E-6
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Table of Contents
Troubleshooting
