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PowerAbsent

 

Table 1: Alarm Details

Parameter

Description

Code

powerAbsent

Description

No Power Available: No power is available to the power entry module (PEM).

Caution: Continued operation might cause equipment damage.

Entities Affected

Equipment (see respective table below).

Possible Causes

  • AC PEM: The input AC voltage is either less than 90 Vac or greater than 255 Vac, and the output DC voltage is either less than 40 Vdc or greater than 60 Vdc.

  • DC PEM: The input and output DC voltages are either less than 40 Vdc or greater than 60 Vdc.

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See Clearing a PowerAbsent alarm.

Related Fault Hierarchy

Table 2: Equipment

Entity Name

 

Fault Indicator

Equipment

Indicator

Status

pem:<chassis>/<slot>

PEM

See the PEM specifications in the BTI7800 Series Hardware Overview and Installation Guide.

Clearing a PowerAbsent Alarm

Note

Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

  1. Check the power distribution to the chassis:
    • Ensure that each PEM is properly seated and the power connection to it is secure.

    • Ensure that each external source DC power circuit breaker is on.

    • Ensure that each the external power wires are delivering power correctly.

  2. Check for alarms on the PEM .
    • If the alarm clears, you have successfully completed this procedure.

    • If the alarm does not clear, contact your next level of support.