Lincoln Electric POWER WAVE SVM173-A User Manual
Power wave 455m/stt, Svm173-a, Service manual
Table of contents
Document Outline
- Master Table of Contents
- Safety
- Section A - Installation
- Section B - Operation
- Section C - Accessories
- Section D - Maintenance
- Section E - Theory of Operation
- Section F - Troubleshooting and Repair
- Symptoms
- The input fuses repeatedly fail or the input circuit breakers keep tripping.
- The machine is dead—no lights— no output—the machine appears to be off.
- The Power Wave 455M does not have welding output. The main input contactor CR1 is not activating. Fan may be running.
- The thermal light is lit. The machine regularly "overheats."
- The machine often "noodle welds" when running a particular process. The output is limited to approximately 100 amps.
- The machine often "noodle welds" when running an STT process.
- The Power Wave 455R will not produce full output.
- The Auxiliary Receptacle is "dead." The 120VAC is not present at the receptacle.
- The Power Wave 455M is "triggered" for output but there is no welding output.
- When in the STT mode, the spatter is higher than normal and the arc is inconsistent.
- Section G - Electrical Diagrams