APC P D U User's Guide download pdf (Page 15)

USER’S GUIDE

Switched Rack PDU

Load indicator LED

The load indicator LED identifies overload and warning conditions for the displayed

phase or bank.

Watchdog Features

Overview

To detect internal problems and recover from unanticipated inputs, the Rack PDU uses

internal, system-wide watchdog mechanisms. When it restarts itself to recover from an

internal problem, a System: Warmstart event is recorded in the event log.

Network interface watchdog mechanism

The Rack PDU implements internal watchdog mechanisms to protect itself from

becoming inaccessible over the network. For example, if the Rack PDU does not

receive any network traffic for 9.5 minutes (either direct traffic, such as SNMP, or

broadcast traffic, such as an Address Resolution Protocol [ARP] request), it assumes

that there is a problem with its network interface and restarts itself.

Condition Description

Solid Green The current of the displayed phase or bank is under normal

conditions and is between Near Lowload and Near Overload

thresholds.

Yellow The displayed phase or bank is in a Near Overload Warning

condition. The current is above the Near Overload Warning

threshold.

Red The displayed phase or bank is in an Overload condition. The

current is above the Overload Alarm threshold.

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APC P D U User's Guide Page 15