Gdc 74A Message Advisories; Gcu 478 Message Advisories - Garmin Cirrus Perspective SR20 Cockpit Reference Manual

annunciations & alerts

gdC 74a message advisories

Message
ADC1 ALT EC – ADC1 altitude error
correction is unavailable.
ADC2 ALT EC – ADC2 altitude error
correction is unavailable.
ADC1 AS EC – ADC1 airspeed error
correction is unavailable.
ADC2 AS EC – ADC2 airspeed error
correction is unavailable.
MANIFEST – GDC1 software
mismatch, communication halted.
MANIFEST – GDC2 software
mismatch, communication halted.

gCu 478 message advisories

Message
GCU CNFG – GCU Config error.
Config service req'd.
GCU FAIL – GCU is inoperative.
MANIFEST – GCU software
mismatch, communication halted.
GCU KEYSTK – GCU [key name]
Key is stuck.
88
Cirrus Perspective
Comments
GDC1 or GDC2 is reporting that the altitude
error correction is unavailable.
GDC1 or GDC2 is reporting that the airspeed
error correction is unavailable.
The GDC 74A has incorrect software installed.
The Perspective
Comments
GCU 478 configuration settings do not match
those of backup configuration memory. The
Perspective
A failure has been detected in the GCU 478.
The GCU 478 is unavailable.
The GCU 478 has incorrect software installed.
The Perspective
A key is stuck on the GCU 478 bezel. Attempt
to free the stuck key by pressing it several times.
The Perspective
the problem persists.
by Garmin – Cockpit Reference Guide for the SR20/SR22
®
® system should be serviced.
®
system should be serviced.
®
system should be serviced.
® system should be serviced if
190-00821-03 Rev. A