Aluminium Welding; Maintenance; Possible Problems And Remedies - CEA COMPACT 240M Manual De Instrucciones Lista Repuestos

• Release the torch button.

Aluminium welding

To weld with aluminum wire proceed as follows:
• Replace the drive rolls with special ones for aluminium wire;
• Use a torch with a 3m cable and a carbon Teflon sheath;
• Set the pressure between the drive rollers at the minimum,
by turning the screw provided;
• Use argon gas at a pressure of 1-1,5 bar.

Maintenance

IMPORTANT: Any eventual maintenance must be carried
out by expert, qualified personnel. The guarantee is invali-
dated if the final user attempts to repair any damage done
to the machine by himself.
ATTENTION: Before carrying out any inspection of the inside
of the generator, disconnect the system from the supply.
GENERATOR
The maintenance of this equipment is limited to the cleaning of
the inside of the frame and periodic inspection of worn cables
or loose connections. At regular intervals disconnect the wel-
der from the mains, take off the cover and use dry compressed
air to remove possible accumulations of dirt and dust. During
this operation do not direct the jet of air onto electronic com-
ponents. Check, that the gas circuit is completely free from
impurities and that the connections are tight and that there are
no leaks. Carefully check that the electric valve does not leak.
Check the wire feeder rolls periodically and replace them when
wear impairs the regular flow of the wire (slipping etc).
TORCH
The torch is subjected to high temperatures and is also stres-
sed by traction and torsion. We recommend not to twist the
wire and not to use the torch to pull the welder. As a result
oftheabovethetorchwill requirefrequent maintenance such as:
• cleaning welding splashes from the gas diffuser so that the
gas flows freely;
• substitution of the contact point when the hole is deformed;
• cleaning of the wire guide liner using trichloroethylene or
specific solvents;
• check of the insulation and connections of the power cable;
the connections must be in good electrical and mechanical
condition.
REPLACEMENT OF THE ELECTRONIC CARD
ATTENTION: Static can damage the circuit boards! It is
advisable to wear an "antistatic bracelet when working
with the circuit boards or their components.
Proceed as follows:
• Open the moving part of the cover on the right-hand side
using the relative bolts.
• Remove the black fibre board cover by unscrewing the 3
screws with a suitable screwdriver (fig. H).
• Remove the circuit board connectors.
• Take the plugs off the handles located on the front rack
panel and then remove them with a suitable box wrench.
• The circuit board can now be removed and replaced;
• Reverse the procedure to fit the new card.

Possible problems and remedies

The detection of eventual problems and their solution. The
power supply line is the major source of problems. In the
event of a fault proceed as follows:
1) Check the voltage of the supply;
2) Check the state of the line connection at the plug and the
main switch;
3) Check that the main fuses are not burnt out or loose;
4) Check the following for defects:
• The switch and wall outlet that power the machine
• The plug and mains cable
• The welder switch
12
2000H919
Fig. H