AUXILIARY EFIS ANNUNCIATORS
Various amber annunciators, located on the airplane annunciator panel and in the upper left corner of
the multi-function display (MFD), are used to monitor the condition of the various components of the
EFIS system. Procedures in the Abnormal Procedures section of the AFM must be followed in the
event of illumination of one or more of the annunciators. Their function is to warn of overtemperature
and failure conditions in the respective primary flight displays or other EFIS components as follows:
IC-1 HOT Indicates Pilot IC-615 Integrated Avionics Computer Overtemperature
Condition.
IC-2 HOT Indicates Copilot IC-615 Integrated Avionics Computer Overtemperature
Condition.
IC-1-2 HOT Indicates Overtemperature Condition of Both IC-615 Integrated Avionics
Computers.
IC-1 FAN Indicates Failure of Pilot’s IC-615 Cooling Fan.
IC-2 FAN Indicates Failure of Copilot’s IC-615 Cooling Fan.
IC-1-2 FAN Indicates Failure of Both Pilot’s and Copilot’s IC-615 Cooling Fans.
DU 1-2-3 FAN Indicates Failure of the PFD or MFD cooling fan.
DU 1-2-3 HOT Indicates overtemperature of the PFD or MFD most likely caused by failure
of the cooling fan.
CHK PFD1 IC-615 Display Guidance Computer Detects a Wraparound Failure in PFD 1.
This annunciator appears in the MFD and is also found on the annunciator
panel.
CHK PFD2 IC-615 Display Guidance Computer Detects a Wraparound Failure in PFD 2.
This annunciator appears in the MFD and is also found on the annunciator
panel.
CHK PFD1-2 IC-615 Display Guidance Computer Detects a Wraparound Failure in Both
PFDs.
AHRS BASIC-1 Indicates AHRS 1 is in basic mode. AHRS 1 has lost TAS/GS input.
AHRS BASIC-2 Indicates AHRS 2 is in basic mode. AHRS 2 has lost TAS/GS input.
AHRS BASIC-1-2 Indicates that both AHRS are in basic mode.
PWR-1-2 Indicates AHRS 1 or 2 has transferred to the auxiliary battery due to loss of
DC power.
Cessna Citation XLS - Instrumentation & Avionics
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