Lincoln Electric SQUARE WAVE TIG 175 PRO Operator's Manual page 20

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Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Machine is Dead -
No Output - No Fan
Fan runs - No output from machine
in either Stick or TIG modes.
Fan runs - No output from machine
in either Stick or TIG modes and the
yellow light on the control panel is
on.
Machine does not respond (no gas
flow, no high frequency and no open
circuit voltage) when arc start switch
or Amptrol is activated - fan is work-
ing.
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 AREAS OF
MISADJUSTMENTS(S)
OUTPUT PROBLEMS
1. Make certain that the input
power switch is in the "ON"
position and machine is plugged in.
2. Check the input voltage at the
machine. Input voltage must
match the rating plate and voltage
connection. Refer to Reconnect
Procedure in the Installation sec-
tion of this manual.
3. Blown or missing fuses in
input line.
1. Check for proper input voltages
per nameplate and voltage
reconnection.
2. Check to make sure polarity
switch is not in between two
positions.
1. Welding application may have
exceed the recommended duty
cycle. Allow the unit to run until
the fan cools the unit and the
yellow light goes out.
1. Machine MUST be in
the TIG Mode.
2. The Amptrol may be defective.
Check for continuity between
pins "D" and "E" on cable con-
nector when Amptrol is
depressed.
CAUTION
SQUARE WAVE TIG 175 PRO
RECOMMENDED
COURSE OF ACTION
Contact your Local Lincoln Authorized
Field Service Facility for technical
troubleshooting assistance.
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