Comtech EF Data SMS-458B - Manual (Page 89)

SMS-458B Modem Protection Switch Revision2
Maintenance MN/SMS458B.IOM
5–3
5.1.5 Battery Faults
Note: After the battery is recharged or replaced, the switch must be reconfigured.
A BATTERY fault indicates that a battery failure has occurred. The cause may be the
result of a low M&C battery.
A low battery alarm indicates that the battery voltage is below its specified level and that
the battery should be recharged or replaced. It does not necessarily indicate that memory
data will be lost if power is turned off, but it does indicate that data entered by the
memory at power-up is suspect.
5.2 Fault Isolation
The following tables list the procedures for clearing fault indications in the fault menu or
the remote interface (the remote interface messages are identified within parentheses).
The tables list the fault messages on the left and the procedures on the right. Perform the
steps in the order listed to clear the fault or to determine why the fault remains.
5.2.1 Modulator Operation
Faults Procedures
BK-UP FAULT MOD X
(MOF_BU_OP_FLT_x) If no M:N faults exist:
Verify that the switch is in AUTO mode.
Verify that a backup modulator is available to backup all of the
faulted prime modulators.
Verify that the data cable between the switch and the modem
is connected to the correct connectors.
If an M:N fault exists, check M:N faults for communication,
configuration, and compatibility faults.
If there are faulted primes that are not backed up, the
modulator operation fault display will remain on.