Install Manual

Preliminary
SKY899
Installation Manual
4-22
Rev. A
Table 4-2. Installation Related Error Messages (Continued)
ERROR NO. MESSAGE REMARKS
ERROR 20 Barometric Input Error a. Check altimeter source. Is the unit turned on and been given enough time to warm up.
b. Cycle power.
c. Ensure that barometric altitude input is from only one source (gilham code or ARINC-
429).
d. Encoded inputs can be checked from the barometric altimeter data monitor screen (para
4.4.2.3).
e. Using the service menu, verify barometric source configuration and altitude information
(para 4.4.2.3).
f. Check wiring associated with altimeter source.
ERROR 21 GPS Input Error a. Check GPS source is it turned on and locked onto satellites.
b. Using the service menu, verify configuration (speed and equipment type) is set correctly.
c. Check ARINC-429 wiring associated with GPS.
ERROR 22 Heading Input Error No heading input being received (ARINC-429 or synchro compass).
a. Check heading source.
b. Using the service menu, verify heading setup in Mag Heading data monitor (para
4.4.2.3).
c. If the heading signals become valid, the system will recover automatically.
d. Check wiring associated with heading input.
ERROR 23 Synchro Input Error Invalid synchro compass input (XYZ signals or 400 Hz reference).
a. Check heading source.
b. Using the service menu, verify heading setup in mag heading data monitor (para 4.4.2.3).
c. If the heading signals become valid, the system will recover automatically.
d. Check wiring associated with synchro compass input.
ERROR 29 System Config Error a. SKY899 requires a barometric altitude input in order to operate. Verify a source has been
selected in service menu.
b. Check wiring associated with configuration module if error reoccurs replace configuration
module.
The error messages in table 4-3 are used by factory technicians in determining what actions may have
preceded a system failure. These messages do not necessarily indicate a current system failure and are
provided for information only. Should the installer observe these messages in the error log without a
SKY899 Failed message during normal operation, no service action is required.
Table 4-3. Informational Error Messages
ERROR NO. MESSAGE ERROR NO. MESSAGE
ERROR 01 Boot Error ERROR 16 Antenna Sel. Unit Error
ERROR 02 ROM Memory Error ERROR 18 ARINC 429 Comm Error
ERROR 03 RAM Memory Error ERROR 19 Serial Comm Error
ERROR 04 Watchdog Error ERROR 24 Software Error
ERROR 05 Bus Fault Error ERROR 25 Operating Sys Error
ERROR 08 Unused Interrupt Error ERROR 26 Video Controller Error
ERROR 09 I/O Board Error ERROR 27 Video Memory Error
ERROR 11 Power Supply Error ERROR 28 NVRAM Error
ERROR 12 RF Failure Error ERROR 30 System Test Error
ERROR 13 RF Transmitter Error