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STEALTH DIGI-TIG 320 AC/DC PULSE
30
S/N
PROBLEM REASON
SOLUTION
Gas cylinder is closed or
Open or change gas cylinder
pressure is low
8
No gas flow (TIG)
Valve is blocked
Remove blockage
Electromagnetic valve damaged Change valve
Gas test on front panel is on
Turn off gas test
Valve is blocked
Remove blockage
9 Gas flows continually
Electromagnetic valve damaged Change valve
Pre gas time adjustment knob
on front panel is damaged
Repair or change
Welding current cannot be
Front panel welding current
10
adjusted
potentiometer is not working
repair or change potentiometer
efficiently or damaged
Power PCB is not working
Repair or change
efficiently
11 No AC output when ‘AC’ is
selected
AC drive PCB is damaged
Change PCB
AC IGBT module damaged
Change module
Min value displayed not
Adjust potentiometer lmin on
accordant with actual value
power board
(refer to 3.1)
Welding current displayed is
12
not accordant with actual value Max value displayed not
Adjust potentiometer lmin on
accordant with actual value
power board
(refer to 3.1)
Welding current adjusted too low Increase welding current
Penetration of molten pool is
13
insufficient
Arc is too long in welding
process
Use 2T operation