GYS MULTIWELD 250T-C Mode D'emploi page 18

ELECTRODE WELDING
• The reverse polarity cable must be disconnected in MMA (stick welding) mode in order to connect the electrode holder and earth
clamp. Connect the electrode holder and earth clamp as indicated on the electrode packaging.
• Respect the basic rules of welding.
• This device has 1 feature specific to Inverter machines :
- Anti-Sticking: Enables easy removal of the electrode from the metal. The anti-sticking feature, after its start, requires approxima-
tely a 3 seconds delay before resuming normal welding operations.
ADVICE & THERMAL PROTECTION
This device is equipped with a ventilator regulated by the inside temperature. When the machine's thermal protection is activated,
it will not deliver any current. Yellow light (fig. V-1) will turn on until the temperature of the machine has returned to normal.
• Do not block/cover the ventillation holes, ensure free flow of air.
• Whilst in thermal protection mode leave the machine plugged into the mains after welding to allow it to cool.
General observations :
• Always respect the basic rules of welding.
• Always work in an adequately ventillated area.
• Do not work on a damp surface.
• In order to avoid gas leak, use collarleak, use collars supplied in the accessories box.
- Set the gas flow by adjusting the dial located on the pressure regulator.
TROUBLESHOOTING
SYMPTOMS
The welding wire speed is not constant.
The wire-feeder motor doesn't operate.
Bad wire feeding.
No welding current
The wire jams (after the rollers)
The welding bead is porous
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MULTIWELD 250T-C/320T-C
POSSIBLE CAUSES
Debris is blocking up the opening.
The wire skids in the rollers.
Reel or roller brake too tight.
Electrical supply problem.
Covering wire guide dirty or damaged.
The drive roller is too loose
Reel brake too tight
Bad connection to the main supply
Bad earth connection.
Torch trigger inoperative.
Guide wire sheath crushed.
Wire jammed in the torch
No capillary tube.
Wire speed too fast
The gas flow rate is not sufficient.
Gas bottle empty.
Gas quality unsatisfactory.
Air flow or wind influence.
Gas nozzle dirty.
Poor quality wire.
Surface to weld in bad condtion. (rust,
etc...)
REMEDIES
Clean out the contact batch or change it
and replace the anti-adherence product.
Ref. 041806.
• Control the roller pressure or replace it.
• Wire diameter non-compatible with
roller.
• Covering wire guide in the torch
non-compatible.
Release the brake and rollers.
Check that the power switch is in the
«On» position.
Clean or replace
Tighten the drive roller knob
Release the brake
Check the mains connection and look
if the plug is fed by 400 V (3PH) power
socket.
Check the earth cable (connection and
clamp condition).
Check the torch trigger / replace torch
Check the sheath and torch body.
Clean or replace.
Check the presence of capillary tube.
Reduce the wire speed
Adjust flow range 15 to 20 L / min.
Clean the working metal.
Replace it.
Replace it.
Prevent drafts, protect welding area.
Clean or replace the gas nozzle.
Use suitable WIRE for MIG-MAG welding.
Clean the metal before welding.
EN