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F-3
TROUBLESHOOTING & REPAIR
F-3
WIRE-MATIC 250
TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call 216-
383-2531 or 1-800-833-9353
OUTPUT PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Major Physical or Electrical Damage
is Evident
Machine is dead- No Open Circuit
Voltage output and No Wire Feed
when gun trigger is pulled.
1.
Contact The Lincoln Electric
Service Dept. (216) 383-2531 or
1-800-833-9353 (WELD)
1.
Check input power switch (S1).
It may be faulty.
2.
Check for lose or broken wires
at the reconnect panel.
3.
Perform
Main Transformer
Test.
4.
Check the thermostats and
associated leads for loose or
broken connections. See wiring
diagram.
5.
The control board may be faulty.
Replace.
1.
Contact your local Lincoln
Electric Authorized Field
Service Facility.
1.
Make certain that the input
power switch is in the "ON" posi-
tion.
2.
Check the input voltage at the
machine. Input voltage must
match the rating plate and the
reconnect panel.
3.
Blown or missing fuses in the
input line.
4.
The thermostats may be open
due to machine overheating. If
machine operates normally after
a cooling off period then check
for proper fan operation and
ventilation. Make certain that
the machine's duty cycle is not
being exceeded.
5.
Check the trigger circuit. Leads
#324 to #325 should have conti-
nuity (zero ohms) when the gun
trigger is pulled. If not then the
gun may be faulty - replace.
CAUTION
