Instruction manual

16
6.4 WELDING WITH COATED ELECTRODES (SMAW)
• This machine can weld any type of coated electrode.
• Position selector (C) on
• When led (N) lights up, you are ready to weld.
• Connect the electrode holder and the ground cable in
accordance with the polarity indicated by the electrode
manufacturer (normally the electrode goes to the + terminal).
7 MAINTENANCE
WARNING:
ALL SERVICING AND REPAIR MUST BE
DONE BY QUALIFIED PERSONNEL
• Before opening the machine case to service
or repair, turn off the machine and disconnect
the plug from the power source.
• As part of general maintenance keep the
TIG torch and the welding wires in good condition.
• Periodically clean the inside of the machine by blowing
dust and particles away with a light jet of dry air.
8 ACCESSORIES
PART N° 180 PULSED REMOTE CONTROL
Essential for TIG welding on thin sheet metal.
It is connected to receptacle (A) on the front panel.
PART N° 132 DIGITAL AMMETER (for article 239)
PART N° 134 DIGITAL AMMETER (for article 237)
This item indicates the welding current. The welding current
can be preset and displayed, see section 4.1.
PART N° 1326 5-meter EXTENSION CORD FOR THE
REMOTE CONTROL UNIT
The pulsed remote control unit ITEM 180 and the remote
current control devi ce (B), may be brought to welding sight
by means of this extension cord.
PART N°182 FOOT CONTROL PEDAL
The foot pedal allows you to regulate the welding current
without having to stop welding.
9 TROUBLESHOOTING GUIDE
Turn the machine off and disconnect the power
input plug from the wall outlet before opening
the machine case to inspect or work on the
inside of the machine.,
Read the information in the following section
carefully. Problems are frequently caused by
improper positioning of the selectors on the front panel of
the machine. After having checked to be sure that all the
selectors are in the correct position, check: the line fuses
to make sure they are not blown, check that all the wires are
properly connected, and check that all the connections are
snug.
9.1 TROUBLE IN THE MACHINE CONNECTIONS
1- TROUBLE-The machine does not turn on
CAUSES-Input power cord not plugged in
-One power supply phase missing
-Machine not connected to the right supply
voltage
2- TROUBLE-The machine switches on but does not
supply current
CAUSES-Current regulating knob(B) is not inserted into
receptacle (A).
-Potentiometer (V) is damaged.
-Welding accessories not connected.
3-TROUBLE-The machine switches on but the yellow
warning light (E) remains lit and the
machine does not supply current.
CAUSES -The thermostat has tripped. Allow the machine
to cool down and then turn it on again.
4- TROUBLE-The red stop led (H) lights up
CAUSES- S.C.R. diode in short circuit.
-Damage to the control card. (exept item 235)
5- TROUBLE-The line fuses trip.
CAUSES -Installed power not sufficient
-Machine not connected to the right supply
voltage.
-Short circuit in the power transformer
-S.C.R. diodes in short circuit.
9.2 TROUBLE WITH THE T.I.G. PROCEDURE
1- TROUBLE-High-frequency failure.
CAUSES -Check that the welding cables are not
damaged.
- Shielding gas is inadequate
-Position selector (M) on
-Position selector (C) on electrode
2- TROUBLE-Difficulties in starting the arc in TIG
CAUSES -Shielding gas is inadequate
- Welding current too low
-Tungsten electrode contaminated. Restore
the tip
-Electrode used was incorrect. A pure tungsten
electrode is used for AC TIG welding and a
Thoriated Tungsten electrode is for DC TIG
welding.
-Defect in the torch push button
-Torch connector not not connected to
receptacle (Q)