Rtech TIG401, Operation Instructions Manual

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When using foot pedal machine is stuck on minimum amps 

Make sure 2/4 way switch is in 2 way position, the remote foot pedal will not work in the 4-
way position, this is for torch switch operation only. 

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Output current  reduced significantly when AC balance control knob is set near or on 
max setting or when base current is set near or at max output 

Input power to machine doesn’t have sufficient capacity. Try changing input power to a 
sufficient supply, refer to installation section 
 
or. Machine is powered from engine generator. If welding at high currents are required try 
switching to fixed mains supply 
 
or. Set AC balance (SP%) to 50 position 

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Arc ‘Flutters’ when TIG welding 

1. Tungsten electrode may be too large in diameter for the current setting. 
2. Tungsten not sharp when in DC mode 
3. Gas shielding flow may be low or high, check gas flow , reduce tungsten stick out 
beyond ceramic 
4. Check for leaks in torch & gas hoses 
 

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Black areas along weld bead 

1. Clean any oily or organic contamination from the work piece 
2 Tungsten electrode contaminated. Replace or sharpen 
3 Check for leaks or contamination on gas hoses & connections. 
4 Gas flow may be insufficient, Increase gas flow, reduce tungsten stick out from ceramic 
 

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Weak HF – Poor arc striking – welding output normal 

1 Check torch and earth connections – is torch cable insulation in good condition. 
2 Check for leaks or contamination on gas hoses & connections. 
3 Gas flow may be insufficient, increase gas flow, reduce tungsten stick out from ceramic 
4 Keep output cables short as possible 

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HF spark is present at the tungsten electrode but unable to start welding arc, 
Machine has normal welding output 

1 Tungsten may be contaminated - replace or sharpen 
2 The current may be set too low 
3 Tungsten may be to large for process 
4 Gas flow may be insufficient, increase gas flow, reduce tungsten stick out from ceramic 

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No HF when torch trigger pressed, no blue spark between HF points 

Examine and clean HF points with clean dry low pressure air line

HF PCB faulty – Contact R-Tech for repair