Possible Faults In The Tig; Possible Electrical Failures; Necessary Ordinary Maintenance; Information On The Different Welding Processes - Selco Genesis G 200 TLH Instruction Manual

7.2 Possible faults in the TIG welding
Fault
Oxidations
Tungsten inclusions
Porosity
Hot cracks

7.3 Possible electrical failures

Fault
Machine does not come on.
(Green led off)
Power delivery not correct.
(Green led on)
No current at output.
(Green led on)
If you have any doubts or problems, do not hesitate to con-
sult your nearest technical service centre.
26
Cause
1) lnsufficient gas.
2) No protection on the re-
verse.
1) lncorrect electrode shar-
pening.
2) Electrode too small.
3) Operating failure (contact
of the tip with the work-
piece).
1) Dirt on the edges.
2) Dirt on the filler material.
3) High advancement speed.
4) Current intensity too low.
1) Unsuitable filler material.
2) High heat supply.
3) Dirty materials.
Cause
1) No voltage at power supply
socket.
2) Faulty power supply plug or
cable.
3) Internal fuse blown.
1) Incorrect setting of welding
parameters.
2) Mains voltage low.
3) Faulty current regulation
potentiometer.
1) Yellow led on and "10"
blinking on D1: equipment
overheated. Wait for
cooling with welder on.
2) "11" blinking on "D1":
power supply voltage too
high
3) "12" blinking on "D1":
power supply voltage too
low
4) "20" flashing on "D1": serial
memory error (contact ser-
vice).
5) "24" blinking on D1: RC
calibration error (call tech-
nical support).
6) "25" blinking on D1: serial
memory error (call techni-
cal support).

8.0 NECESSARY ORDINARY MAINTENANCE

Avoid accumulation of metal dust near and on the ventilation
fins.
Disconnect the system before all operations!
Periodical checks on the power source and WU15:
* Clean the inside using compressed air at low
pressure and soft bristle brushes.
* Check the electrical connections and all con-
nection cables.
For maintenance and use of the pressure reducers,
consult the specific manuals.
For maintenance and replacement of the compo-
nents of the TIG torches, electrode gun and/or
ground cables:
* Disconnect the system before all operations.
* Check the temperature of the components and ensure
that they are not overheated.
* Always use gloves in compliance with regulations.
* Use suitable spanners and tools.
NOTA: Failure to perform said maintenance will invalidate
all warranties and exempt the manufacturer from all liabi-
lity.
9.0 GENERAL INFORMATION ON THE
DIFFERENT WELDING PROCESSES

9.1 Coated electrode welding (MMA)

Preparing the edges
To obtain good welding joints it is advisable to work on clean
parts, free from oxidations, rust or other contaminating agents.
Choosing the electrode
The diameter of the electrode to be used depends on the thick-
ness of the material, the position, the type of joint and the type
of preparation of the piece to be welded.
Electrodes with considerable diameter obviously require very
high currents with consequent high heat supply during the wel-
ding.
Type of coating Property
Rutile Ease of use
Acid High melting speed
Basic Mechanical charact.
Choosing the welding current
The range of welding current in relation to the type of electrode used
is specified by the manufacturer on the electrode container.
Use
All positions
Flat
All positions