Lincoln Electric POWER MIG SVM165-A User Manual
Power mig, 350mp, Service manual svm165-a
Table of contents
Document Outline
- Master Table of Contents
- Saftey
- Section A – Installation
- Section B – Operation
- Section C – Accessories
- Section D – Maintenance
- Section E – Theory of Operation
- Section F – Troubleshooting and Repair
- Symptoms
- Major physical or electrical damage is evident.
- Machine is dead - no welding output and no wire feed when gun trigger is pulled.
- No welding output but wire feeds normally when gun trigger is pulled.
- Wire feeds but welding output is low causing wire to “stub”. Welds are “cold”. Machine cannot obtain full rated output of 350 amps at 32 volts.
- The output voltage and wire feed is present continuously or pulsing when gun trigger is NOT activated.
- The output voltage is present continuously when gun trigger is NOT activated. The wire is not feeding.
- No control of arc voltage. Wire feeding is normal.
- There is no gas flow when gun trigger is pulled. Wire feeds and weld voltage is present.
- There is no voltage available at the 115VAC receptacle.
- No control of wire feed speed. Other machine functions are normal.
- There is no wire feed when gun trigger is pulled. Normal open circuit voltage is present.
- The machine stops feeding wire while welding.
- The arc is unstable and or “hunting.”
- Weld bead is narrow or ropy. May have porosity with electrode stubbing into plate.
- The contact tip seizes in the gas diffuser.
- The welding arc is variable and sluggish.
- The arc striking is poor.
- While loading wire, the rear drive rolls stop while pushing wire through the torch.
- While loading wire, the wire bird nests before the wire gets all the way through the torch.
- While loading wire the wire bird nests if the wire misses the outlet guide while shooting the gap in the torch.
- Acr length varies while welding (arc length is not constant).
- During welding the wire continues to burn back to the tip.
- Wire bird nests while welding.
- Section G - Electrical Diagrams