Alpha Technologies AlphaNet DSM Series DOCSIS - Manual (Page 43)

43 745-814-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 specific definition and are classified 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 specified. Minor and Major
alarms are defined 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 fixed 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 definitions for the XM2 power
supply.
XM2 Major and Minor Alarms
psMinor
Problem Definition
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 configured properly. Possibly detecting input voltage on redundant system or
other issue.
psMajor
Problem Definition
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.
Configuration Failure XM2 has detected that it is improperly configured.
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.”