89000109-002
xVue Touch Installation Manual
Rev 2
Page 8-6
© Honeywell International Inc. Do not copy without express permission of Honeywell.
For Use in Non-Certified Aircraft
• FPGA SPI Bus Monitor
• Ambient Light Sensor Monitor
Refer to Table 8-3 for troubleshooting of the C-BIT failures.
Table 8-3 C-BIT Failures Troubleshooting Chart
Symptom
Fault Recorded
(NOTE 1)
Causes
Corrective Action
PFD Data Stale
“CBIT Heartbeat Fault”
KSD 100EXP Defective
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“KSD OVERTEMP”
Displayed
“CBIT Over-Temperature
Fault”
KSD 100EXP Unit
Temperature Is Too
High
• Turn KSD 100EXP off
to allow it to cool
down
• Check for adequate
ventilation
• Check airflow around
the KSD 100EXP for
any blockages
“COURSE DEVIATION
DATA OUT FAULT”
Displayed
“CBIT AFCS_CRS_ DEV
_OUT Loopback Fault”
Data Mismatch
• Check Wiring from
Autopilot to KSD
100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“CBIT AFCS_CRS_ DEV
_FLAG_OUT Loopback
Fault”
Data Corrupted
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“GLIDESLOPE
DEVIATION DATA OUT
FAULT” Displayed
“CBIT AFCS_GS_ DEV
_OUT Loopback Fault”
Data Mismatch
• Check Wiring from
Autopilot to KSD
100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“CBIT AFCS_GS_ FLAG
_OUT Loopback Fault”
Data Corrupted
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“FPGA SPI BUS FAULT”
Displayed
“CBIT FPGA SPI Bus
Fault”
See “PBIT FPGA SPI Bus Fault” under ““Display
Hardware Error” on Screen” troubleshooting
procedure in Table 8-2 P-BIT Failures
Troubleshooting Chart.
“LIGHT SENSOR FAULT
MANUAL DIM REQ”
Display
“CBIT Light Sensor
Communication Fault”
See “PBIT Light Sensor Communication Fault”
under ““LIGHT SENSOR FAULT MANUAL DIM REQ”
Display” troubleshooting procedure in Table 8-2 P-
BIT Failures Troubleshooting Chart
NOTE 1: For directions how to retrieve the Event Log, refer to
