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Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Welder will not start.
Welder will not weld (Contactors
operating properly)
Welder will not weld (Contactors not
operating).
Welder welds at min. only no control.
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
POSSIBLE
CAUSE
1. Supply line fuse blown.
2. Open supply line lead.
3. Wrong supply line voltage.
1. Electrode or ground cable loose or
broken.
1. Thermostat on coil tripped. Welder
overheated (Fan motors operat-
ing).
light is on.
2. Thermal protection in auxiliary
transformer, T2, has opened. (Fan
motors not running)
3. Circuit across #2 and #4 not work-
ing properly.
4. Wire feeder control power; No
voltage across #31 and #32.
1. Remote control switch in wrong
position.
2. Control rheostat open.
3. Control circuit open.
4. Open saturable reactor control coil
or connection.
5. Welder control circuit dead: No
voltage across Control Board
Transformer X1-X2.
CAUTION
IDEALARC
AC-1200
®
RECOMMENDED
COURSE OF ACTION
1. Replace fuse.
2. Look for possible cause and
repair.
3. Repair. Provide nameplate specified
voltage.
1. Tighten connection or repair bro-
ken cable.
1. Check operation of fans and make
sure there is no obstruction to air
flow. Do not operate in excess of
welder rating.
First check 8 Amp fuse and replace if
necessary. If all recommended
possible areas of misadjustment
have been checked and the prob-
lem persists, Contact your local
Lincoln
Authorized
Service Facility.
1. Switch to "
" for welder rheo-
stat control and to "
trol through accessory.
If all recommended possible
areas of misadjustment have
been checked and the problem
persists, Contact your local
Lincoln
Authorized
Service Facility.
E-2
Field
" for con-
Field
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