6 EN
GENERAL MAINTENANCE
EN
8.0
GENERAL MAINTENANCE
DISCONNECT THE POWER SOURCE FROM THE MAINS BE-
FORE PERFORMING ANY MAINTENANCE WORK.
Every 5-6 months, remove accumulated dust from the inside of
the welding unit with a jet of dry compressed air (after removing
side panels).
BE EXTREMELY CAREFUL TO AVOID BENDING MOVE-
MENTS, WHICH COULD DAMAGE AND CHOKE THE TORCH.
NEVER MOVE THE POWER SOURCE BY PULLING THE
TORCH.
PERIODICALLY CHECK THE CONDITION OF THE TORCH,
WHICH IS THE PART MOST SUBJECT TO WEAR.
8.1
TORCH MAINTENANCE:
1.
GAS NOZZLE (6):
periodically apply welding spray and
clean nozzle interior of residue.
To replace the nozzle:
- Turn the nozzle clockwise to remove
- Fit the new gas nozzle.
2.
WIRE GUIDE TUBE (7):
check the wire passage of the tube
for wear. Replace as necessary.
To replace the nozzle:
- Turn the gas nozzle (6) clockwise to remove.
- Unscrew wire guide tube (7).
- Press the torch button; after a few seconds the wire will pro-
trude from the torch neck.
- Fit the new wire guide tube (7).
- Replace the gas nozzle (6).
- Trim excess wire.
8.2
CONNECTING THE TORCH
Prior to connecting the torch, make sure that the wire sheath (18)
is suited to the diameter of the wire used:
- BLUE Ø 1.5
for wire Ø 0,6- 0.8 mm.
- RED Ø 2.0
for wire Ø 1 - 1.2 mm.
(Wire sheath colour for steel wire).
19
21
18
20
22
TYPE OF BREAKDOWN
POSSIBLE CAUSES
CHECKS AND REMEDIES
No functions operate.
Faulty power cord (one or more phases discon-
nected).
Check and remedy.
Blown fuse.
Renew.
Irregular wire feed.
Insufficient spring pressure.
Try tightening regulating knob.
Wire-guide sheath blocked.
Renew.
Wrong race - unsuitable for wire, or excessively
worn.
Turn roller over or change it.
Braking on coil excessive.
Loosen brake using adjusting screw.
Oxidized, poorly wound, poor quality wire, with
tangled or overlapping coils, etc.
Remedy by removing defective coils. If problem persists, change the
wire reel.
Reduced welding power.
Earth cable not connected.
Check that the power cord is in good condition and make sure that the
ground clamps are flrmly fixed to the works piece, which must be free
of rust, grease and paint.
Detached or loose connection on switches.
Check, tighten or renew, as necessary.
Faulty contactor.
Check the state of the contacts and the mechanical efficiency of the
contactor.
Faulty rectifier.
Visually check for signs of burn-out; if present, renew rectifler.
Porous or spongy welds.
No gas.
Check presence of gas and gas supply pressure.
Draughts in welding area.
Use a suitable screen. Increase gas delivery pressure if necessary.
Ciogged holes in diffuser.
Clear clogged holes using compressed air.
Gas leakage due to rupture in supply hoses.
Solenoid valve blocked.
Check and renew faulty component.
Check solenoid operation an electrical connection.
Porous or spongy welds.
Faulty pressure regulator.
Check operation by removing the hose connecting the pressure regu-
lator to the power source.
Poor quality gas or wire.
Gas must be extra-dry; change the cylinder or use a different type wire.
Gas supply does not switch off.
Worn or dirty solenoid valve.
Dismantle solenoid; clean hole and obturator.
Presslng torch trigger produces no
result.
Faulty torch trigger, disconnected or broken
control cables.
Remove the torch connection plug and short-circuit the poles; if the
machine operates properly, check the cables and the torch trigger.
Blown fuse.
Renew using a fuse of the same rating.
Faulty power switch.
Clean with compressed air. Ensure that wires are tightly secured; re-
new switch if necessary.
Faulty electronic circuit.
Renew circuit.
