User's Manual

Fault Name BIT Check Raise Fault/Failure Condition
Clear Fault/Failure
Condition
System ISVM ISDM GPS Operable SDU SCM
A717
INACTIVE
ARINC
573/717
Receiver
Inactive Fault
The “ARINC 573/717 Receiver fault
will be raised if the ARINC 573/717
is configured Active data and the
data is not present.
The ARINC 573/717
Receiver Fault will be cleared
if ARINC 573/717 data
resumes.
Yes OK OK
Verify ARINC 573/717
data.
Comment
L-3 Iridium SATCOM System - Built-in Test and Fault Indicators
EXTERNAL CHECKS
Indicator Description
LED Off Fault/Event
Fault Light
Discrete Output
ON OFF
Operational,
No Failure/Fault
Critical Failure
Front Panel LEDs MCDU Indicators
MCDU TX FAIL
MCDU
Transmitter
Port
Loopback
The “MCDU Transmitter Port
Loopback Failure” will be raised if
an ARINC 429 Transmitter Port is
configured as ARINC 739 MCDU
dh l b kf h i
A raised “MCDU Transmitter
Port Loopback Failure” will
be cleared if the loopback is
detected from the port for
which the
“
MCDU
No FAIL OK Verify MCDU system.
Loopback
Failure
and the loopback
f
rom the port is
not detected.
which
the
MCDU
Transmitter Port Loopback
Failure” was raised.
SERIALn
FAULT (n =
Port Number)
RS-232/422
Receive Fault
A “RS-232/422 Receive Fault” will
be raised for any active RS-
232/422 Serial Port for which a
received data error is reported.
A raised “RS-232/422
Receiver Fault” will be
cleared if the data is received
without error over the port for
which the fault was raised.
Yes OK OK
Verify received serial data
on indicated port.
SERIALn FAIL
(n = Port
Number)
RS-232/422
Transmission
Loopback
Failure
The “RS-232/422 Transmission
Loopback Failure” will be raised for
any Active RS-232 Serial Port
whose loopback is not detected
after three loopback attempts.
The “RS-232/422
Transmission Loopback
Failure” cannot be cleared
once raised.
Yes FAIL OK
Verify serial data on
indicated port.
DOUTn FAIL (n
= Port Number)
Discrete
Output Failure
A “Discrete Output Failure” will be
raised for any Discrete Output Port
that is Active and does not output
the expected voltage.
The “Discrete Output Failure”
will be cleared if the expected
voltage is output from the
port for which the fault was
raised.
Yes FAIL OK
Verify discrete output on
indicated port.
ETHERNETn
FAULT (n =
Port Number)
Ethernet Link
Fault
The “Ethernet Link Fault” will be
raised if Ethernet is Monitored and
there is no link.
The “Ethernet Link Fault” will
be cleared if Ethernet is
Monitored and there is a link.
Yes OK OK
Verify indicated Ethernet
port. Access to MUI may
be impacted, may need to
access MUI through
another Ethernet port.
another
Ethernet
port.
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