Possible Electrical Failures; Commissioning; Start-Up; Possible Faults In The Mma Welding - Selco Genesis 245 TLH Instrucciones De Uso

WARNING
* The electrical system must be made by skilled technicians
with the specific professional and technical qualifications
and in compliance with the regulations in force in the
country where the equipment is installed.
* The welding power source supply cable is provided with a
yellow/green wire that must ALWAYS be earthed. This yel-
low/green wire must NEVER be used with other voltage
conductors.
* Verity the existence of the earthing in the used plant and
the good condition of the socket/s
* lnstall only plugs that are homologated according to
the safety regulations.

2.5.3 Possible electrical failures

Fault
Machine fails to come on
(Green LED off)
Power output incorrect
(Green LED on)
Absence of output current
(Green LED on)
(Yellow LED on)
For any doubts and/or problems do not hesitate to contact
your nearest customer service centre.

2.6 Commissioning

2.6.1 Start-up

For commissioning of the system, follow the instructions below:
a) Position the power source in a dry, clean and suitably venti-
lated place.
b) Adjust the gas flow from 5 to 10 l/min.
Connection for MMA welding (Fig.1)
The connection shown in the figure produces
reverse polarity welding. To obtain straight polarity
welding, invert the connection.
Cause
- No current in the power
socket.
- Faulty supply plug or cable.
- Internal fuse blown.
- MMA/TIG selector switch
in incorrect position or
faulty.
- Faulty current control
potentiometer.
- Equipment overheated.
With welder on, wait for it
to cool.
- Mains power voltage out
of range.
Fig.1
Connection for TIG welding (Fig.2)
- Connect the gas pipe from the cylinder to the rear gas con-
nection.
If a problem occurs during the above phases, check the dis-
play leds and if necessary consult the chapter "Possible pro-
blems".

2.6.2 Possible faults in the MMA welding

Fault
Excessive spatter
Craters
Inclusions
Insufficient penetration
Sticking
Blow-hole and porosity
Cracks
Fig.2
Cause
- Long arc.
- High current.
- Fast movement of the
electrode away from piece.
- Poor cleanliness or distri-
bution of the passes.
- Defective movement of
the electrode.
- High progression speed.
- Welding current too low.
- Narrow chamfering.
- Deseaming failure on top.
- Arc too short.
- Current too low.
- Humidity in electrode.
- Long arc.
- Current too high.
- Dirty materials.
- Hydrogen in weld
(present on electrode
coating).
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