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OUTPUT PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
Machine welds at a very low out-
put regardless of the current con-
trol setting.
1. If welding in the TIG mode the
remote control device may be
defective.
2. Make certain the input line volt-
age is correct for the machine
reconnect configuration.
3. Check the welding cables and or
torch for loose or faulty connec-
tions.
1. Check the polarity switch and
associated leads.
2. Check the interior connections
of the heavy current carrying
leads.
3. Perform the SCR Bridge Test.
4. Perform the T1 Transformer
Test.
5. Check the current control for
proper operation. Normal
resistance is 10k ohms. See
wiring diagram.
6. The control board may be
faulty.
The machine welds at a very high
output regardless of the current
control setting.
1. If welding in the TIG mode the
remote control device may be
defective.
1. Perform the SCR Bridge Test.
2. Perform the T1 Transformer
Test.
3. Check the current control for
proper operation. Normal
resistance is 10k ohms. See
wiring diagram.
4. The control board may be
faulty.
TROUBLESHOOTING AND REPAIR
F-7 F-7
PRECISION TIG® 225
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