R-Tech TIG315, Operation Instructions Manual

21

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Machine stuck on minimum amps when welding although higher amperage has been 
set  
 

Make sure

machine has not been set to 4-way operation as when in this mode when you 

press torch switch you get minimum amps and when you let go of switch machine will go to 
maximum amps set. 

•

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. 

•

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 

•

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 
 

•

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 
 

•

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