Right WAI valve Right WAI pressure sensor Left WAI pressure sensor Left WAI pressure sensor Set valve positions according to flow schedule OPAS AUTO WING OFF ON ACIPS control card— EAI (2) ASG  cards (2) WAI selector (P5) Ice detector (2) WOW ADIRU WES ASCPC ECSMC AIMS FMCS Left, Right Arinc 629 systems buses P210 right power management panel ACIPS control card—WAI Flow schedule example P84 right systems card file On Auto & wing ice Takeoff mode Air < 10 minutes Ground mach < 0.18 In air < 5 min Auto slat ADP operation Engine start Bleed temp < 200 °F (93 °C) Wing ice Wing ice Air 28V DC right  main  bus WAI CTRL TAT > SOF (10 °C) 240 °F 310 °F 380 °F 450 °F Precooler out temp Altitude Flow rate Figure 15-12.  WAI inhibit logic schematic. With auto or on selected, the operational mode is inhibited  if any of these conditions occur: The aircrew can monitor the WAI system on the onboard  computer maintenance page.  [Figure 15-13]  The following  information is shown: The WAI valves stay closed as long as the operational mode  inhibit is active. If the valves are already open, the operational  mode inhibit causes the valves to close. BITE circuits in the WAI ACIPS computer card continuously  monitor the WAI system. Faults that affect the dispatch  of the aircraft cause status messages. Other faults cause  15-9 •  Airplane on the ground (except during an initiated or  periodic built-in test equipment (BITE) test) •  Total Air Temperature (TAT) is more than 50 °F  (10 °C) and the time since takeoff is less than 5  minutes •  Auto slat operation •  Air-driven hydraulic pump operation •  Engine start •  Bleed air temperature less than 200 °F (93 °C). •  AIR FLOW—air flow through the WAI valves in  pounds per minute •  AIR PRESS—pressure downstream of the WAI valves  in PSIG •  VALVE—WAI valve open, closed, or regulating •  WING MANIFOLD PRESS—pneumatic duct  pressure in PSIG WAI Indication System WAI System (BITE) Test