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TROUBLESHOOTING & REPAIR
F-4 F-4
SQUARE WAVE TIG 275
Observe Safety Guidelines TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
The machine is dead. No weld out-
put - no 115 VAC at the receptacle.
(220 VAC receptacle on European
models only).
1. Check the input voltage. The
input voltage must match the
rating plate and the voltage con-
nection. Refer to
Reconnect
Procedure
in the Installation
section of this manual.
2. Make sure the input power
switch is in the “ON” position.
3. Check for blown or missing
fuses in the input lines.
1. Check the input power switch,
reconnect panel and associated
wires for loose or faulty connec-
tions.
2. The input power switch may be
faulty.
3. Perform the
T1 Transformer
Test.