Tweco 400 XT Ultra-Cut Plasma Cutting System With Automated Gas Control - Manual (Page 97)

ULTRA-CUT 400 XT
Manual 0-5306 OPERATION 4-29
Group 9 - Shield H2O Proportional Valve (V2)
9-1 Valve open Check for open connection; Replace valve.
9-2 DPC inlet Supply pressure
low
Raise plasma inlet pressure; check for DMC valve not open; restriction in gas supply/hoses.
9-3 Outlet flow too low Valve full on but pressure still too low. Leak in shield hose to torch; Defective control valve (V2);
Defective pressure sensor (PS5) or flow sensor (FS-1) if equiped; DPC Control PCB
9-4 Outlet flow low Tracking error, outlet pressure too low. Leak in shield hose to torc; Defective control valve (V2).
Defective pressure sensor (PS5) or flow sensor (FS-1) if equiped; DPC Control PCB
9-5 Outlet flow Too high Valve set to minimum but valve outlet pressure still too high. Mineral build up or other restriction in
control valve (V2), DPC manifold, shield hose or torch; Defective control valve (V2)/ Defective pres-
sure sensor (PS5) or flow sensor (FS-1) if equiped; DPC Control PCB
9-6 Outlet flow high Tracking error, outlet pressure too high. Mineral build up or other restriction in control valve (V2),
DPC manufold, shield hose or torch; Defective control valve (V2); Defective pressure sensor (PS5)
or flow sensor (FS-1) if equiped; DPC Control PCB