R-Tech TIG200PDC Operation Instructions Manual - page 17
Tig welding problems
●No output - Power light is not lit
Check machine on/off switch is in the 'on' position
Check Input power to machine
Check plug wiring Check mains trip / fuses
● No output - Fan runs - Power light is lit
Check torch connections are secure and torch switch operation, try replacing tig torch.
If you have a multi-meter check continuity between pins 1 and 2 on torch switch plug when pressing
torch switch
● No output - Power light is lit - Warning light is lit
Welding application may have exceeded recommended duty cycle, allow machine to cool
down until the warning light goes out.
●No output - Power light is lit - Gas at torch end when trigger pressed
Check torch condition - possible break in torch power cable - replace torch
● Machine keeps overheating - Warning light is lit on machine
Check if fan is running - if not contact R-Tech for repair Check the cooling vents for obstruction, blow
out machine with clean dry low pressure air supply. Check for adequate ventilation around machine
●Porosity in weld - No / low gas at torch tip
Check gas supply from gas bottle Check flow rate on regulator Check gas hose for restrictions Check
for draughts in local area, open doors etc Replace tig torch - may have gas restriction
●Poor weld penetration
Check condition of earth lead and clamp and ensure clamp is connection via a clean area on work
piece
Check condition of tig torch, try other tig torch
●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.
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 contaminationfrom thework piece
2Tungsten 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 .
17