Possible Problems And Remedies; Troubleshooting Table; Welding Defects - CEA COMPACT 364 Manuel D'instructions

ponents. Check, that the gas circuit is completely free from im-
purities 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 stressed
by traction and torsion. We recommend not to twist the wire and
not to use the torch to pull the welder. As a result of the above
the torch will require frequent 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.

Troubleshooting table

Problem
The line fuses burn out and
close the line circuit breaker
The line fuses burn out when
the torch button is pressed
The line fuses burn out after
working for some time
The welder does not emit current
Welding current unsteady

Welding defects

Problem
Porosity (external or internal)
Withdrawal cracks
Lateral incisions
Excessive splashing
Cause
• Wrong connection
• Short circuit on fan motor
• Short circuit on rectifier
• Short circuit on main transformer winding
• Fuses not high enough capacity
• Wrong connection
• Line fuses burnt out
• Circuit open on welding cables
• Variations of voltage on the line
• Section of connecting cables too small
• Loose connections
Cause
• Defective wire
• Insufficient gas flow
• Defective solenoid
• Wire guide nozzle clogged
• Gas flow holes clogged
• Drafts of air
• Wire or piece dirty or rusty
• Bead too small
• Bead too concave
• Bead too penetrating
• Pass speed too high
• Current too low and voltage too high
• Voltage too high
• Wire guide nozzle clogged
• Torch tilted too much
REPLACEMENT OF THE ELECTRONIC PCB
Proceed as follows:
• Open the moving part of the cover on the right-hand side us-
ing the relative bolts.
• Remove the black fibre board cover by unscrewing the 3
screws with a suitable screwdriver (Fig. I).
• 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 pow-
er 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
Remedy
• Check and follow the instructions for connection
• Repair or replace the motor
• Replace rectifier
• Replace transformer
• Use fuses of adequate capacity
for the line absorption
• Check and follow the instructions for connection
• Find the cause and replace
• Check the welding cables for breakage
• Check the line voltage with a voltmeter
• Replace with cables of adequate section
• Check connections to the power mains and
welding circuit and tighten if necessary
Remedy
• Change wire
• Adjust flow
• Check
• Clean nozzle
• Clean with jets of air
• Screen the workplace
• Replace wire or clean piece
• Increase current
• Reduce voltage
• Reduce voltage and current
• Slow down
• Increase wire speed and reduce voltage
• Adjust voltage
• Clean nozzle
• Tilt correctly
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