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TROUBLESHOOTING & REPAIR
F-10 F-10
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
TIG WELDING PROBLEMS
The machine output is intermittent-
ly lost. Gas flow and high frequen-
cy are also interrupted.
1. The problem may be caused by
high frequency interference.
Make sure that the machine is
grounded properly according to
the installation instructions. If
there are other high frequency
sources in the area, make cer-
tain that they are grounded
properly.
2. Make sure the Amptrol is oper-
ating properly.
3. Check to make sure that the
input voltage is correct for the
machine to reconnect configura-
tion. Refer to
Reconnect
Procedure
in the Installation
section of this manual.
1. Check for loose or faulty con-
nections on the leads between
the remote receptacle and plug
J7 on the control board. See
the Wiring Diagram.
2. Check the plugs on the control
board for loose connections.
3. The control board may be faulty.
No gas or water flow (with optional
water solenoid) when the arc start
switch or Amptrol is activated in the
TIG mode. All other machine func-
tions are normal.
1. The gas (or water) supply is
either empty or not turned on.
2. The flow regulator may be set
too low.
3. Check the supply hoses for
kinks or blockages.
4. The filters may be blocked.
1. Perform the
Gas Solenoid
Test.
2. The control board may be faulty.