D-2 Saturn B – Chapter 5. Appendices
List of Alarm Messages
14 NVRAM CRC NVRAM in Main Control Unit • If one of the two last records in
FAILURE (MCU) erased or defective. the "INFO LOG" (FUNC.31),
then information only. No alarm.
15 GROUP ID Error occurred when trying to • Information only. No alarm.
FAILURE register new group id.
16 DISTRESS UNIT Distress Alarm defective or not • Check distress ID in FUNC.70,
FAILURE connected, or wrong address • Check distress ID in Distress
programming. Unit.
17 ANT.RESET No response to antenna reset. • Replace antenna ACU.
FAILURE
18 ACU/MCU TYPE Wrong antenna type connected • Replace ACU software.
MISMATCH to Main Control Unit (MCU).
19 CALIBRATING Fluxgate compass failure • Replace fluxgate.
FAILURE • Too strong magnetic field close
to the antenna.
20 TX POWER OFF Main Control Unit failed to turn • Replace antenna TX unit.
FAILURE off transmitter in antenna.
21 MCU CARRIER Main Control Unit carrier not re- • Perform Clear RAM in MCU.
MISSING ceived by transmitter in antenna. • Replace antenna TX unit.
• Replace MCB board.
22 HPA CARRIER Carrier not sent by antenna • Replace antenna TX unit
NOT SENT transmitter.
23 MCU BURST Main Control Unit carrier not re- • Perform Clear RAM in MCU.
MISSING ceived by transmitter in antenna. • Replace antenna TX unit.
• Replace MCB board.
24 HPA BURST Carrier not sent by antenna • Replace antenna TX unit
NOT SENT transmitter.
25 PRINTER Printer programmed in Main • Check cable between MCU and
NO RESPONSE Control Unit (MCU), but fails to serial printer.
respond. • Disable printer connection to
printer port in various printer
programming.
27 PC TELEX PC output programmed in Main • Check cable between PC Telex
NOT READY Control Unit (MCU), but telex and MCU.
fails to respond. • Start PC Telex program on PC
telex.
• If no PC Telex connected to
MCU, set SERV.ANN=0 in
FUNC.77.
Ref Display
Comments Action
No. Message
Appendix D – List of Alarm Messages Cont’d
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