Omega 350C, Operation Manual

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