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TYPE OF BREAKDOWN
Reduced welding power.
Porous or spongy welds.
Porous or spongy welds.
Gas supply does not switch off.
Presslng torch trigger produces no
result.
GENERAL MAINTENANCE
POSSIBLE CAUSES
Earth cable not connected.
Detached or loose connection on switches Check, tighten or renew, as necessary.
Faulty contactor
Faulty rectifier.
No gas.
Draughts in welding area.
Ciogged holes in diffuser.
Gas leakage due to rupture in supply hos-
es.
Solenoid valve blocked.
Faulty pressure regulator.
Poor quality gas or wire.
Worn or dirty solenoid valve.
Faulty torch trigger, disconnected or bro-
ken control cables.
Blown fuse.
Faulty power switch.
Faulty electronic circuit.
CHECKS AND REMEDIES
Check that the power cord is in good condition and make sure that the
ground clamps are flrmly fixed to the works piece, which must be free of
rust, grease and paint.
Check the state of the contacts and the mechanical efficiency of the con-
tactor
Visually check for signs of burn-out; if present, renew rectifler.
Check presence of gas and gas supply pressure.
Use a suitable screen. Increase gas delivery pressure if necessary.
Clear clogged holes using compressed air.
Check and renew faulty component.
Check solenoid operation an electrical connection.
Check operation by removing the hose connecting the pressure regulator
to the power source.
Gas must be extra-dry; change the cylinder or use a different type wire.
Dismantle solenoid; clean hole and obturator.
Remove the torch connection plug and short-circuit the poles; if the ma-
chine operates properly, check the cables and the torch trigger.
Renew using a fuse of the same rating.
Clean with compressed air. Ensure that wires are tightly secured; renew
switch if necessary.
Renew circuit.
7 EN
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