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7. Trouble shootings
Step
Phenomenon
1
Power lamp id not tuned on
when power switch is ON.
Only FAN works
Power lamp is on. but fan
2
does not work.
Gas do not come out
3
4
Gas comes out
continuously
Weld wire is not fed even
though inching switch is
5
pressed
Wire is not fed when torch
switch is ON
Voltage and current are
6
not adjustable
Under no load condition,
voltage meter does* not
work and no arc
Under no load condition,
7
voltage meter works but no
Crater is not controllable
8
Poor contact of the 1st *put part
Gas comes out even if power is
Poor contact of earth able
arc
Reason
Poor lamp
Poor fuse
Poor NFB
Poor torch switch
Poor fan motor
No gas or no connection
Poor solenoid valve
Defect in control PCB
Poor torch switch
off.
Poor solenoid valve
Defect in control PCB
Poor torch switch
Poor motor fuse
Poor motor
Poor PCB relay
Poor torch switch
Poor PCB
Poor remote contact
Poor control volume
Poor PCB
Poor torch switch
Poor PCB
Broken torch cable
Poor control volume
Poor PCB
13
Remedy
Replace lamp
Contact test
Replace fuse
Replace NFB
Replace torch switch
Replace fan motor
Check and replace
Replace valve
Request A/S
Replace torch switch
Remove foreign material from
valve
Replace valve
Request A/S
Replace torch switch
Replace fuse
Replace motor
Replace relay
Replace torch switch
Request A/S
Check and replace
Replace
Request A'S
Replace torch switch
Request A/S
Replace torch cable
Check
Replace
Request A/S
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