Cirrus Perspective™ by Garmin – Cockpit Reference Guide for the SR20/SR22/SR22T 190-00821-09 Rev. A144Annunciations & AlertsFlightInstrumentsEISNav/Com/XPDR/AudioAFCSGPS NavFlightPlanningProceduresHazardAvoidanceAdditionalFeaturesAbnormalOperationAnnun/AlertsAppendixIndexGCU 478 MESSAGE ADVISORIESMessage CommentsGCU CNFG – GCU Config error.Config service req’d.GCU 478 configuration settings do not matchthose of backup configuration memory. ThePerspective™ system should be serviced.GCU FAIL – GCU is inoperative. A failure has been detected in the GCU 478.The GCU 478 is unavailable.MANIFEST – GCU softwaremismatch, communication halted.The GCU 478 has incorrect software installed.The Perspective™ system should be serviced.GCU KEYSTK – GCU [key name]Key is stuck.A key is stuck on the GCU 478 bezel. Attemptto free the stuck key by pressing it several times.The Perspective™ system should be serviced ifthe problem persists.GDL 90 MESSAGE ADVISORIESMessage CommentsGDL90 CONFIG – GDL 90 configerror. Config service req’d.GDL 90 configuration settings do not matchthose of backup configuration memory. ThePerspective™ system should be serviced.GDL90 FAIL – GDL 90 has failed. A failure has been detected in the GDL 90. Thereceiver is unavailable. The Perspective™ systemshould be servicedMANIFEST – GDL softwaremismatch, communication halted.The GDL 90 has incorrect software installed.The Perspective™ system should be serviced.GTS 800 MESSAGE ADVISORIESMessage CommentsGTS CONFIG – GTS config error.Config service req’d.The GTS and GDU have incompatibleconfigurations. This alert is also set when theGTS has an invalid mode S address configured orthe mode S address does not match both XPDRmode S addresses.MANIFEST – GTS softwaremismatch, communication halted.The GTS has incorrect software installed. ThePerspective™ system should be serviced.
