D-1Saturn B – Chapter 5. Appendices
List of Alarm Messages
0 RX LOCK Receiver synthesizer out of lock • Replace MCB board.
FAILURE
1 ANTENNA LINK No communication with antenna. • If also ANTENNA INIT FAILURE,
FAILURE check FUNC. 33 "RX SIGNAL":
-if "OFF", check antenna cable.
-if "ON", replace antenna TX unit.
• Replace antenna ACU.
• Replace MCB board.
2 TERMINAL ID ID PROM in Main Control Unit • Replace ID PROM.
CRC FAILURE (MCU) defective.
3 TX DETECTOR Illegal initial transmitter output • If also TX MONITOR FAILURE,
FAILURE level detected in Antenna Control check FUNC. 33 "RX SIGNAL":
Unit (ACU).
if "OFF", replace antenna RX unit.
• Replace antenna TX unit.
4 TX MONITOR Illegal initial transmitter input • Replace antenna TX unit.
FAILURE level detected in Antenna Control
Unit (ACU).
5 ACU 28 VOLT Antenna Control Unit (ACU) • Check 28 voltage in both ends
FAILURE input power too low. of cable: if missing at MCU end
with cable disconnected, replace
MCU power.
6 ACU EPROM Antenna Control Unit (ACU) • Replace antenna ACU PROM.
FAILURE EPROM defective. • Replace antenna ACU.
7 ACU RAM Antenna Control Unit (ACU) • Replace antenna ACU.
FAILURE RAM defective.
8 DSP COMM. Digital Signal Processor - CPU • Replace DSP software.
FAILURE communication failure. • Replace MCB board.
9 ALONE LES Default Standalone LES • Information only. No alarm.
PRESELECTED preselected.
10 DISTRESS LES Default Distress LES preselected. • Information only. No alarm.
PRESELECTED
11 STAND ALONE Standalone LES operative. • Information only. No alarm.
LES USED
12 CALL REPEAT Due to heavy traffic. Minimum • The time between two call
TIME LONG time between call requests can attempts too short. No alarm.
be up to 17 minutes.
13 EEPROM CRC EEPROM in Main Control Unit • If the last record in the "INFO
FAILURE (MCU) erased or defective, or LOG" (FUNC.31), then
new software loaded. information only. No alarm.
• Replace ID PROM.
Ref Display
Comments Action
No. Message
Appendix D – List of Alarm Messages
Appendix D
List of Alarm Messages
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