L3 Communications MX-15i Operation & Maintenance Manual page 109

TM00358 Rev. A
Table 5-5 Failure Descriptions for 6.x BIT Codes (Continued)
BIT
Message
#
6.6 Focus Servo Failure
6.7 FOV Position Error
6.8 FOV Control Failure
6.11 TEC Position Error
6.12 TEC Servo Failure
6.13 Not Communicating
6.14 Calibration Failure
6.16 WAE Not
Communicating
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Category Failure Description
MAJOR Focus servo loop of IR sensor not
responding properly.
No focus control available for IR
sensor.
MINOR FOV elements failed to reach
specific position in a specific time.
MAJOR Zoom servo loops of IR sensor not
responding properly.
No zoom control available for IR
sensor. If mechanism is between
zoom positions, it will not produce
usable video. If mechanism is stuck
at a zoom position, that focal length
will be the only one available.
MINOR TEC elements failed to reach a
specific position in a specific time.
TEC position error should only
occur if a fault arises during a 2-
Point calibration.
MAJOR TEC servo loop of IR sensor not
responding properly.
If mechanism is between positions
or at the calibrate position, it will not
produce usable video. If it is at the
normal setting, some focal lengths
are available. However, a 2-Point
calibration cannot be performed.
MAJOR Processing electronics not
communicating with IR Video
Processor. There will be no video
from IR sensor.
MINOR Calibration procedure failed.
MAJOR IR VP failing to communicate with
WAE (resides at IR sensor within
gimbal).
No video from IR sensor.
Chapter 5 - BIT Error Codes
Recommended Action
Execute a BIT from the Level 2 IR
Menu. If failure persists, replace
turret.
Verify that FOV can be changed. If
FOV control loss impacts mission,
replace turret.
Execute a BIT from the Level 2 IR
Menu. If failure persists, replace
turret.
Verify that IR imagery is well
corrected after a 2-Point calibration
is completed. If not, cycle the turret
power and apply only a 1-Point
calibration. If problem persists
replace turret.
Execute a BIT from the Level 2 IR
Menu. If failure persists, replace
turret.
Execute a BIT from the Level 2 IR
Menu. Perform steps in the Fault
Isolation Trees.
Retry calibration. If a second failure
occurs, change Scene Setup from
Default to High and retry calibration.
If calibration procedure failure
continues, use the system
uncalibrated and replace turret at
next convenient opportunity.
Execute a BIT from the Level 2 IR
Menu. Perform steps in the Fault
Isolation Trees.
October 2007
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