Comtech EF Data MBT-4000 - Manual (Page 70)

MBT-4000 Multi-Band Transceiver System Revision 4
Faults/Events MN/MBT4000.IOM
B–2
B.2 Faults/Events
There are three types of Faults/Events that may occur and be recorded in the event log of an
MBT-4000, BDC-4000, or BUC-4000:
• Summary Faults
• Configurable Summary Faults
• Informational Events.
Each of these are described in further detail in the
next subsections; Tables B1 through B6 list
possible Fault/Event messages where applicable.
An example of a faulted system is shown in
Figure B-2; here, Unit 2 has faulted.
Figure B-2. Faulted System Example
B.2.1 Summary Faults
Summary Faults indicate improper operation. When a Summary Fault condition occurs, the
Summary Fault Relay will be de-energized. If a Summary Fault occurs on a converter, it will
mute. If a Summary Fault occurs on the base unit, the applicable converters (one or both) will be
muted according to the specific error. If a Summary Fault occurs on the online unit of a redundant
pair, the offline unit will detect the fault and assume online state. In all cases, a corresponding
event message will be added to the event log.
Table B-1. MBT-4000 Summary Faults
Mnemonic Type Mute Description
15V PS1 Summary Fault All The 15 volt power supply is out of tolerance.
28V PS1 Summary Fault All The 28 volt power supply is out of tolerance.
5VT PS1 Summary Fault All The 5 volt power supply is out of tolerance.
7V5 PS1 Summary Fault All The 7.5 volt power supply is out of tolerance.
IIC BUS Summary Fault All
Unable to communication via the internal high speed
communication bus
Table B-2. BDC-4000/BUC-4000 Summary Faults
Mnemonic Type Description
15V SUP Summary Fault The 15 volt power supply is out of tolerance.
5VT SUP Summary Fault The 5 volt power supply is out of tolerance.
7V5 SUP Summary Fault The 7.5 volt power supply is out of tolerance.
OVR TMP Summary Fault The maximum operating temperature has been exceeded.
PLL LD Summary Fault The PLL has lost lock.