User's Manual

Fault Name BIT Check Raise Fault/Failure Condition Clear Fault/Failure Condition System ISVM ISDM GPS Operable SDU SCM
LOW VOLTS
Low Voltage
Status
The “Low Voltage Status” will be
raised if the system enters the Low
Input Voltage state.
The “Low Voltage Status” will be
cleared if the system exits the
Low Input Voltage state.
Yes OK OK
Check input voltage if
persistent.
ALTERNATE
POWER
Alternate
Power Status
The “Alternate Power Status” will
be raised if the voltage at the
Alternate Input is below 18.0 V or
above 32.2 V.
The “Alternate Power Status”
will be cleared if the voltage at
the Alternate Input is within an
inclusive range of 18.0 V to 32.2
V.
Yes OK OK Check input voltage.
Comment
L-3 Iridium SATCOM System - Built-in Test and Fault Indicators
POWER CHECKS
Indicator Description
LED Off Fault/Event
Fault Light
Discrete Output
ON OFF
Operational,
No Failure/Fault
Critical Failure
Front Panel LEDs MCDU Indicators
POWER LOSS
Power Loss
Check
The “Power Loss Status” will be
raised if the system enters the
Power Failure state.
The “Power Loss Status” will be
cleared if the system exits the
Power Failure state.
No FAIL No Check input voltage.
L‐3AviationRecordersProprietary