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8 | Trouble Shooting |
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Fault |
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Irregular wire feed |
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| Incorrect tension of tension roller | Adjust tension | |||
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| Pilot groove of feed roller and intake nozzle not | Align |
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| Liner clogged or not correct size for wire | Check and/or change |
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| Wire spooled irregularly, rusty or of inferior quality | Clean or change liner |
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| Wire spool carrier to tight | Change spool |
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| Feed rollers dirty of worn, groove not matching | Loosen |
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| wire size | Clean or replace |
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Brittle | or porous welding | Gas line fittings not tight | Check fittings | ||||
seam |
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| Gas cylinder empty | Replace cylinder | |
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| Gas cylinder valve closed | Open valve |
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| Pressure regulator not working | Check |
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| Solenoid valve not working | Check power at solenoid |
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| Gas shroud or line in lead ass'y clooged | Clean shroud and spray, blow out gas line |
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| Air draft at weld seam | Protect from draft or increase gas flow |
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| Workpiece not clean | Remove rust, grease, paint |
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| Wire of inferior quality or unsuitable gas | Change wire, use suitable gas |
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Constant gas flow |
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| Solenoid valve defective or dirty | Check, clean or replace | |||
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No wire feed |
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| Trigger switch or leads in lead ass'y defective | Check, replace if necessary | ||
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| PCB defective | Replace |
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| Fine wire fuse on PCB defective | Replace (2 amp |
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Wire | feed | speed | not | PCB defective | Replace | ||
adjustable |
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Not | welding | current | with | Contactor faulty | Replace | ||
normal working wire feed | Step with faulty | Replace | |||||
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| Earth cable not conducting | Correct |
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Arcing | when | gas | shroud | Clean shroud, treat with | |||
touches workpiece |
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| nozzle dip (see footnote below). | |||
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Torch | becomes | exces- | Contact tip loose or too large for wire diameter | Tighten tip; replace with correct size tip | |||
sively hot |
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No function of machine | Mains fuse/circuit breaker tripped | Reset or replace | |||||
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Torch under current when | Contactor sticky or contacts burned | Check and replace | |||||
machine is switched OFF |
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machine: | One phase missing | Check contactor for proper function | |||||
excessive spattering with |
| Check mains fuses, check power at contactor | |||||
all welding step setting |
| terminals (all 3 phases) | |||||
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Step switch defective | Check and replace |
Cables between step switch and transformer | Check and replace |
loose or broken |
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Important! The capacitors of the