Instruction Manual

43745-814-B0-001, Rev. A
6.3.4 General Power Supply Alarms
General power supply alarms are passed directly from the power supply to the
transponder without specic denition and are classied in the HMS MIB table as
psMinorAlarm and psMajorAlarm. There are a number of problems that can generate
these alarms, and the exact nature of the situation is not specied. Minor and Major
alarms are dened by the SCTE standards committee as follows:
psMajor
“Service has been dropped or a service interruption is imminent. Indicates that an
immediate truck roll is appropriate.” Several psMajor alarms are latching, meaning
that the alarm won’t clear until the problem is xed and after either a successful
completion of a self-test or a complete power cycle of the power supply.
psMinor
“A non-service effecting condition has occurred and should be monitored.”
The following table lists the psMajor and psMinor alarm denitions for the XM2 power
supply.
XM2 Major and Minor Alarms
psMinor
Problem Denition
Line Loss from Inverter Status Loss of AC line as determined by power supply inverter.
Battery Temperature Probe Indicates an XM-2 temperature probe has failed or is not connected.
N+1 Error N+1 circuit isn’t congured properly. Possibly detecting input voltage on redundant system or
other issue.
psMajor
Problem Denition
Output Failure (non-latching) AC output failure, open or short detected by power supply.
General Failure (latching) Indicates a latched failure of an automated, local or remote inverter test, or some other major
malfunction within the power supply.
Test Fail (latching) Battery voltage drops below 1.85V/cell or inverter fail during self test.
Battery Fail (non-latching) Battery voltage drops below 1.75V/cell while in standby mode; battery exceeds 2.5V/cell;
Batteries not detected.
Line Isolation (latching) Line isolation circuitry has failed.
Output Overload (non-latching) Indicates XM2 is overloaded. Power supply will shut down and restart periodically.
Charger Failure (non-latching) Charger has failed or was shut down due to problem such as battery over-temp.
Inverter Fail (latching) XM2 has detected a failure in inverter operation.
Conguration Failure XM2 has detected that it is improperly congured.
Overtemp Inverter heat sink over-temperature.
N+1 Active A power supply has failed and the N+1 system has been activated to provide backup power.
Fuse Fail Fuse failed on tap switch option board.
Table 6-7, XM2 Major and Minor Alarms
6.0 Data Management, continued
6.3 SCTE-HMS MIB Alarms, continued
NOTE:
The cause of a psMajor alarm can be determined by checking the Discretes table in the Alpha MIB. The
cause will have the value of “ALARM.”