Manual 0-4691
5-21
SERVICE
5
5. Faulty Logic PC Board
a. Check for (±) 12vdc on Main PC Board between J43-9 and TP1. If (±) 12vdc is present, replace Logic PC
Board.
6. Faulty Main PC Board
a. Check for (±) 0 vdc on Main PC Board between J43-9 and TP1. If (±) 0 vdc is present, replace Main PC Board.
7. Faulty Fan(s)
Measure for (±) 230 VAC on the Main PC Board from J15-1 to J15-5, and from J15-2 to J15-6.
•
If voltage at J15-1 to J15-5 is correct, replace upper Fan (M1).
•
If voltage at J15-2 to J15-6 is correct, replace lower Fan (M2).
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.
A
r
t # A-07168
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r
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g-Loaded Cyli
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ll Comp
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S
p
r
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g-Loaded Cyli
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at F
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1/8” (3 mm)
4. Worn or faulty torch parts
a. Inspect torch consumable parts. Replace if necessary.
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