89000109-002
xVue Touch Installation Manual
Rev 2
Page 8-5
© Honeywell International Inc. Do not copy without express permission of Honeywell.
For Use in Non-Certified Aircraft
8.1.2 C-BIT
Continuous Built-in-Tests (C-BIT) run continuously as a background task checking important functional
capability during normal operation. If the CBIT detects a fault, the appropriate annunciation will be
displayed.
The following PBITs are performed:
• Heartbeat Monitor
• Over-Temperature Monitor
• Loopback Monitor
“APM Configuration
Mismatch Error" on
Screen
“APM Backup module /
APM module mismatch”
The Configuration Data
Stored in KSD 100EXP
and Configuration
Module Differ
• Reset Configuration
Data in Configuration
Module
“APM BACKUP FAULT”
Displayed
“PBIT APM Backup Fault”
The Backup
Configuration Data is
unavailable
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
“APM MODULE
DETECTION FAULT”
Displayed
“PBIT APM Module
Detection Fault”
Loss of Communication
with Configuration
Module
• Check that Configura-
tion Module is
installed and wired
properly
Configuration Module
Defective
• Replace Configura-
tion Module
“APM MODULE
CONFIGURATION DATA
FAULT” Displayed
“PBIT APM Module
Configuration Data
Fault”
Configuration Module
Defective
• Check that Configura-
tion Module is
installed and wired
properly
• Reset Configuration
Data in Configuration
Module. If fault per-
sists, replace Configu-
ration Module
“PILOT
CONFIGURATION
FAULT” Displayed
“PBIT Pilot Configuration
Fault”
Pilot Stored
Configuration Data Has
Been Lost
• Replace KSD 100EXP
“LIGHT SENSOR FAULT
MANUAL DIM REQ”
Display
“PBIT Light Sensor
Communication Fault”
Loss of Communication
with Ambient Light
Sensor
• Revert dimming con-
trol to manual opera-
tion
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
NOTE 1: For directions how to retrieve the Event Log, refer to
Table 8-2 P-BIT Failures Troubleshooting Chart
Symptom
Fault Recorded
(NOTE 1)
Causes
Corrective Action
