Tweco 38 CutMaster - Manual (Page 42)

SERVICE 5-10 Manual 0-2964
M. No gas flow; AC indicator ON; Fan operates
1. Gas not connected or pressure too low
a. Check gas connections. Adjust gas pressure to proper setting.
2. Shield Cup not properly installed.
a. Check to see that Shield Cup is properly installed.
3. Faulty components in unit
a. Return for repair or have qualified technician repair.
N. Torch cuts but not adequately
1. Current (A) control set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed.
3. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface while purging and observe oil or moisture buildup (do not
activate torch). If there are contaminants in the gas, additional filtering may be needed.