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TROUBLESHOOTING GUIDE
X. SYMPTOM
1. Cause
a. Check / Remedy.
A. AC indicator OFF, Fan does not operate.
1. Circuit Breaker open.
a. Reset Breaker.
B. AC indicator ON, Yellow Overtemperature indicator ON.
1. Unit is overheated.
a. Make sure the unit has not been operated beyond 40% duty cycle limit.
2. Airflow obstructed.
a. Provide at least 5 m clearance on each side.
3. Shorted torch. overtemperature indicator lights momentarily and unit shuts down.
a. Check for proper torch parts assembly, or for shorted torch head.
C. AC indicator ON, Yellow Overtemperature indicator not lighted, no gas flow in purge or pre-flow.
1. Gas not connected or pressure too low.
a. Check source for at least 50 psi (3.5 BAR) during purge or pre-flow, adjust gas pressure to
50 psi.
2. Air filter or air line blocked, torch leads blocked.
a. Replace filter cartridge. Check that air lines and torch leads are free of twists and kinks.
D. AC indicator ON, Yellow Overtemperature indicator not lighted, no gas flow when torch
switch pressed.
1. Shield cup not properly installed on torch.
a. Check that shield cup is fully seated against torch head.
2. Faulty Torch Switch or Parts Assembly in torch holder.
a. Refer to Maintenance for Torch Head Components.
3. Faulty Main PC Board
a. Repair/Replace Power Supply
E. AC indicator ON, Yellow Overtemperature indicator not lighted, gas flows. Torch does not
pilot.
1. Faulty torch parts
a. Inspect torch parts and replace if necessary.
2. Gas pressure too high.
a. Set pressure to 50 psi (3.5 BAR).
3. Faulty main PC board.
a. Repair/replace power supply.
F. Torch pilots but does not cut.
1. Work lead not connected.
a. Make sure work lead is connected securely to bare metal.
2. AC input power too low
a. Use shortest service to breaker panel possible.
3. Faulty Main PC Board
a.Repair/Replace Power Supply
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