100i / 200i / 300i / 400i
Manual PN: 0560956430 OPERATION 93
Group 8 - Shield Gas Proportional Valve (V1)
8-1 Valve open Check for open connection; Replace valve.
8-2 Gas Control Unit inlet Sup-
ply pressure low
Raise plasma inlet pressure; check for Gas Selection Console valve not open; restriction in gas sup-
ply/hoses.
8-3 Outlet pressure too low Valve full open but pressure still too low. Leak in plasma hose to torch; defective control valve;
defective pressure sensor (PS5); Gas Control Unit Control PCB
8-4 Outlet pressure low Tracking error. Leak in plasma hose to torch; defective control valve; defective pressure sensor
(PS5); Gas Control Unit Control PCB
8-5 Outlet pressure Too high Valve at minimum setting but pressure still too high. Restriction in plasma hose, torch, Gas Control
Unit manifold; defective control valve; defective pressure sensor (PS5); Gas Control Unit Control
PCB
8-6 Outlet pressure high Tracking error. Restriction in plasma hose, torch, Gas Control Unit manifold; defective control valve;
defective pressure sensor (PS5); Gas Control Unit Control PCB
Group 9 - Shield H2O Proportional Valve (V2)
9-1 Valve open Check for open connection; Replace valve.
9-2 Gas Control Unit inlet Sup-
ply pressure low
Raise plasma inlet pressure; check for Gas Selection Console valve not open; restriction in gas sup-
ply/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; Gas Control Unit 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; Gas Control Unit 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), Gas Control Unit manifold, shield hose or torch; Defective control valve (V2)/
Defective pressure sensor (PS5) or flow sensor (FS-1) if equiped; Gas Control Unit Control PCB
9-6 Outlet flow high Tracking error, outlet pressure too high. Mineral build up or other restriction in control valve (V2),
Gas Control Unit manufold, shield hose or torch; Defective control valve (V2); Defective pressure
sensor (PS5) or flow sensor (FS-1) if equiped; Gas Control Unit Control PCB
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