No.P10224
P. 36 / 47
12. MAINTENANCE AND TROUBLESHOOTING (continued)
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Replacement of high-pressure electrolytic capacitor
The stability of high-pressure electrolytic capacitor C2 and C4 (refer to CONNECTION
DIAGRAM or PARTS ARRANGEMENT DRAWING) is maintained by supplying stable direct
current to primary transistor inverter. However, an electrolytic capacitor such as battery contains
battery electrolyte. And the life of the capacitor is limited, since it is impossible to stop leaking
the battery electrolyte completely. Therefore, the replacement of the high-pressure electrolytic
capacitor C2 is recommended every 5 years. Failure to do so may result in damaging the high-
pressure electrolytic capacitor, as well as other parts of the welding machine.
12.2 Welding error table
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Check the error table below before requesting repair.
Error Cause
Checkpoint
Connection of base metal and torch cable.
Fuse of input power disconnect switch. Connection
of input cables.
No WARNING lamp lights.
No difference in voltage
between torch and base
metal.
Control cable and socket.
Fuse of input power disconnect switch. Connection
of input cable.
No WARNING lamps light.
Control cable and socket.
No arc generated.
Wire will not be fed.
Pressure lever of wire feeder.
Settings of current and voltage.
Settings of welding mode and wire size set.
Improper welding conditions
Distance between torch and base metal.
No insulator on surface of base metal.
Connection of base metal and torch cable.
Bad arc start
Incomplete feed
Tip worn.
Connection of base metal and torch cable.
Incomplete feed
Tip worn.
Current, voltage, and amount of gas flow.
Improper welding conditions
Welding mode and wire size properly set.
Pressure adjustment of wire.
Parts matching wire size used.
Opening of tip not damaged.
No built-up dusts in liner.
Wire not smoothly fed.
Conduit not too bent.
No oil on base metal.
Dirty wire and base metal
No rust on wire.
Gas nut not loosen.
Air in shield gas
No holes in gas hose.
Unstable arc and dirty welding bead
Arc blow occurs.
Taking measures to prevent arc blow
