User's Manual

Fault Name BIT Check Raise Fault/Failure Condition
Clear Fault/Failure
Condition
System ISVM ISDM GPS Operable SDU SCM
CONFIG FAIL Temperature
Sensor Fault
A “Temperature Sensor Fault” will be
raised if one or more of the temperature
sensors are considered unreasonable.
The “Temperature Sensor
Fault” will be cleared if all of
the temperature sensors
report a reasonable
temperature
Yes OK OK
CONFIG
FAULT
System Low
Temperature
Status
The “System Low Temperature Status”
will be raised if the system enters the
System Low Temperature state.
The “System Low
Temperature Status” will be
cleared if the system exits
the System Low
Yes OK OK Temperature is
below -15 C.
NVM FAIL
ISVM Elevated
The
“
System High Temperature Status
”
The
“
System High
Yes
OK
OK
Temperature is
Comment
L-3 Iridium SATCOM System - Built-in Test and Fault Indicators
TEMPERATURE CHECKS
Indicator Description
LED Off Fault/Event
Fault Light
Discrete Output
ON OFF
Operational,
No Failure/Fault
Critical Failure
Front Panel LEDs MCDU Indicators
NVM
FAIL
ISVM
Elevated
Temperature
Status, or ISVM
High
Temperature
Status, or System
High
Tt
The
System
High
Temperature
Status
will be raised if the system enters the
System High Temperature state.
The
System
High
Temperature Status” will be
cleared if the system exits
the System High
Temperature state.
Yes
OK
OK
Temperature
is
above 70 C.
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