Tweco 81 with SL100SV - Manual (Page 85)

Manual 0-4641 5-21 SERVICE
5
D. Torch will not pilot when torch switch is activated; AC and GAS indicators ON; Temp and DC
indicators OFF
1. Gas pressure too high or too low
a. Adjust gas pressure per pressure setting label on power supply.
2. Torch tip, start cartridge, or electrode missing.
a. Turn off power supply. Remove shield cup, install missing parts.
3. Start cartridge is stuck
a. Turn off power supply. Remove shield cup, tip, and start cartridge. Check lower end fitting on start cartridge
for free movement. Replace cartridge if lower end fitting does not move freely.
Art # A-07168
Spring-Loaded Cylinder
at Full Compression
Spring-Loaded Cylinder
at Full Extension
1/8” (3 mm)
4. Worn or faulty torch parts
a. Inspect torch consumable parts. Replace if necessary.
E. Gas flows; AC indicator and GAS indicators ON; TEMP indicator off; ON; DC indicator
off or blinks on/off once.
1. Faulty IGBT or Output Diode Module Assembly(s)
a. Check per Subsection 5.08-C; repair as needed.
2. Faulty Main PCB
a. Test; repair as needed.