SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
MCS--4200/7200 Multi--Channel SATCOM System
23--20--35
15 Jul 2006
Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6--17
Table 6-5.
Level 1 Failure Messages (cont)
Level 1
Code
Description
Failure Message
D8
DLNA/(SDU)--(T/L)
Top/Port HGA LNA coax cable output to HSU or SDU
D9
DLNA/(SDU)--R
Starboard HGA LNA coax cable output to HSU or SDU
DA
DLNA/(SDU)--LO GN
LGA LNA coax cable output to HSU or SDU
DB
LO GAIN SUBSYSTEM
LGA log--on functional test failure or could not initiate test
DC
NO ACTIVE MU/CMU
At least one (C)MU is communicating, but none have declared
themselves active
DD
SDU OWNER
REQS--SECD
Error in the secured ORT partition
DE
SDU OWNER
REQS--USER
Error in the user ORT partition
DF
HI GAIN SUBSYSTEM
Slave HGA log--on functional test failure or could not initiate test
E1
BAD HSU DISABLE DISC
HSU disable discrete from SDU not functioning
E4
BAD HSU/SDU I/F VER
Incompatible interface between HSU and SDU
E6
HSU/HPA TX RF PATH
HSU to HPA coax cable
E8
DLNA/HSU RX RF PATH
DLNA to HSU coax cable
EC
WRG:STRAPS/HSU
HSU configuration pins error
ED
WRG:STRAPS/HSU ORT
HSU configuration pins and SDU ORT settings disagree
EE
WRG:FWD ID/HSU
HSU forward ID straps error
Undefined:
Others
LEVEL 1 FAULT XX
XX is the Level 1 failure code (undefined)
NOTE: The front panel display messages associated with failure codes CBx and CCx (WRG:SDI/HPA HI--GAIN and
WRG:SDI/HPA LO--GAIN, respectively) are identical to the messages raised for failure codes D1x and D2x,
respectively. This use of a single front panel display message for multiple failure codes (where the CB/CCx
codes reflect detection by the HGA/LGA HPA of an invalid HPA SDI strap condition, while the D1/D2x codes are
generated by the SDU in response to a report from the HGA/LGA HPA of having detected an unexpected SDI
code) is deliberate, and results from alignment of the front panel display messages with their CFDS/CMC
counterparts. Because of this approach, it is possible (in this specific case) for an operator to receive two
consecutive front panel display messages that are the same.