Linkoln Electric Square Wave TIG 200 Manuel De L'opérateur page 20

®
SQUARE WAVE TIG 200
PROBLEM
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 or
flashing while welding.
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 working.
Machine regularly over heats
- thermostat opens, Yellow
light on front panel
illuminates or flashes. The
fan runs but machine has no
output.
Machine output is inter-
mittently lost.
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.
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
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 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 cables are firmly connected.
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 AC or DC TIG Mode.
2. The Amptrol may be defective. Check for continuity between pins
"D" and "E" on cable connector when Amptrol is depressed.
1. Welding application may exceed recommended duty cycle. Reduce
the duty cycle.
2. Dirt and dust may have clogged the cooling channels inside the
machine. Blow out unit with clean, dry low pressure air.
3. Air intake, brickwork and exhaust louvers may be blocked due to
inadequate clearance around machine.
1. Check Amptrol for proper operation and loose connections.
2. Check for proper input voltage and proper voltage reconnection.
CAUTION
E-2
TROUBLE SHOOTING
RECOMMENDED
COURSE OF ACTION
Contact your Local Lincoln
Authorized Field Service
Facility for technical
troubleshooting assistance.