Wire Feeder; Solenoid Valve Replacement; Troubleshooting - ESAB MobileFeed 301 AVS Instrucciones De Uso

6 MAINTENANCE
The electrode wire and all metal parts in contact with it are electrically energized while
welding. Inspect these parts periodically for defective insulation and other electrical hazards.
WARNING!
If uninsulated cable and parts are not replaced, an arc caused by a bared cable
or part touching a grounded surface may damage unprotected eyes or start a fire.
Body contact with a bared cable, connector or uncovered conductor can shock,
possibly fatally.
Keep power cables dry, free of oil and grease and protected at all times from damage by hot
metal and sparks.
Clean dirt and metal particles from drive roll groove weekly; replace roll if badly worn.
6.2

Wire feeder

When soft wire is fed, the drive rolls may pick up metal from the wire surface. Accumulation
on the rolls may score the wire with resulting unwanted friction and incorrect feeding.
Inspect the rolls regularly and clean them with a fine-wire power brush. Avoid roughening, or
removing the hardness of groove surfaces in grooved rolls. Any roughening may score the
wire, just as the accumulation being removed may do.
6.3

Solenoid valve replacement

If there is no gas flow through the wire feeder, the gas solenoid valve may be clogged or
electrically malfunctioning and it should be replaced. When replacing the gas solenoid valve,
the inlet, with the word IN or the number "2", must face the rear of the unit.
6.4

Troubleshooting

If the welding equipment does not work correctly, inspect as follows:
1. With all power controls in position on and other operating controls at required settings,
visually check all power cables and connections for evidence of overheating or sparking.
WARNING!
To avoid shock, do not touch electrode wire or parts in contact with it, or
uninsulated cable or connections.
2. Check all gas hoses, connections, flowmeters and regulators for possible sources of
leakage, breakdown or intermittent failure.
3. Isolate trouble to one part of the welding installation: primary power supply, power
source, wire feeder or wire guide train (casing, drive rolls, liners and contact tip). If this
inspection indicates trouble in the wire feeder, refer to the wiring diagram.
WARNING!
Many troubleshooting situations require that the power remain on and that
power terminals in the equipment carry voltage. Exercise extreme caution
when working on "live" equipment. Avoid contact with electrical components,
except when testing with an appropriate instrument.
CAUTION!
Do not make any repairs to equipment unless you are fully qualified, as
described in the maintenance section.
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