R-Tech TIG160FPP Operation Instructions Manual page 23

No HF when torch trigger pressed, no blue spark between HF points
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Examine and clean HF points with clean dry low-pressure
airline HF PCB faulty – Contact R-Tech for repair
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Stick electrode 'blasts off' when arc is struck
Welding current set to high, reduce amperage or use thicker electrode
Contaminated electrodes or material
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Electrode sticks in weld puddle
Welding current is set too low
Arc is too short, keep electrode further away from work
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Excessive splatter
Too long an arc, keep electrode closer to work
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Poor penetration
Travel speed too fast
Too much welding current, reduce welding amperage
Porosity in weld
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Electrodes are damp
Arc too long, get electrode closer to work
23
MMA Stick welding problems