STEALTH DIGI-TIG 180 DC PULSE PFC MV
S/N
PROBLEM REASON
SOLUTION
4 No no-load voltage output
Machine is damaged
Check Pr4 main circuit
(MMA)
Welding cable is not connected Connect welding cable to
with two output of the machine machine output
Welding cable is damaged
Repair or change
Earth cable connection unstable Check earth cable
Welding cable is too long
Use appropriate welding cable
5
Oil or dust on the workpiece
Check and remove
Distance between tungsten and
Reduce distance (about 3mm)
workpiece is too long
HF igniting board does not work Repair or change Pr8
Distance between discharger
Adjust distance (about 0.7mm)
is too short
Welding gun switch malfunction
Check switch, control cable
and aero socket
Gas cylinder is closed or gas
Open or change gas cylinder
pressure is low
6
No gas flow (TIG)
Blockage in the valve
Remove
Electromagnetic valve damaged Change
Front panel gas-test is on
Turn off
Blockage in the valve
Remove
7
Gas continually flows
Electromagnetic valve damaged Change
Front panel gas-test adjustment
knob is damaged
Repair or change potentiometer
Welding current cannot be
Welding current potentiometer
8
adjusted
on the front panel connection Repair or change potentiometer
is damaged
Minimum value displayed is not
accordant with actual value
Adjust potentiometer Imax on
Welding current displayed is
(refer to 3.1)
the power board
9
not accordant with actual value
Maximum value displayed is not
accordant with actual value
Adjust potentiometer Imax on
(refer to 3.1)
the power board
10
Penetration of molten pool is
Welding current adjusted too
Increase welding current
insufficient
low
Too
much
Front panel alarm lamp is on
Over heat
welding current
Reduce welding current output
11
Protection
Working time
Reduce duty cycle (work
too long
intermittently)
Spark on the
HF igniting
board
Arc cannot be
ignited
No spark on
the HF igniting
board
26