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E-2
TROUBLESHOOTING
E-2
PRECISION TIG 185
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, contact your
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Machine is Dead -No Output - No
Fan
Fan runs normally at power up - 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.
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 volt-
age connection. Refer to
Reconnect Procedure in the
Installation section of this manual.
3. Blown or missing fuses in input
line.
1. Check for proper input voltages
per nameplate and voltage recon-
nection.
2. Check to make sure polarity
switch is not in between two posi-
tions.
1. Welding application may have
exceed the recommended duty
cycle. Allow the unit to run until
the fan cools the unit and the yel-
low 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 connector
when Amptrol is depressed.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
OUTPUT PROBLEMS