ServerNet Cluster 6770 Hardware Installation and Support Guide

Troubleshooting

ServerNet Cluster 6770 Hardware Installation and Support Guide—522544-002

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Recovery Procedures

If you encounter a problem with a ServerNet Cluster Switch, use the following

procedures to recover.

Recovery Procedures for the UPS

Problems that might occur on the UPS include an audio alarm that sounds when a

problem has occurred, or the UPS might not be in the correct mode for operation or

replacement of the UPS or ServerNet II Switch.

Resetting the Audio Alarm on the UPS

To reset the audio alarm, press the alarm/reset button, which is the left-most button on

the front panel of the UPS, for 3 seconds until the alarm stops. Even though the audio

alarm may be silenced, the condition that caused the alarm might still exist. If LED 10

is flashing red indicating an overvoltage condition, it is not possible to silence the alarm

unless you remove the AC power from the UPS.

Placing the UPS in Standby Mode

To place the UPS in standby mode, press the standby button, which is the middle

button on the front panel of the UPS. The UPS beeps, LED 16 becomes unlit, and the

UPS stops supplying power to the ServerNet II Switch. Place the UPS in standby

mode before you replace a ServerNet II Switch or UPS. As long as the UPS is plugged

into utility power, the battery in the UPS will continue to be charged, if needed.

Placing the UPS in Operate Mode

To place the UPS in operate mode, press the power-on button, which is the right-most

button on the front panel of the UPS. The UPS beeps, the green LED 16 is lit, and the

UPS supplies power to the ServerNet II Switch.

Powering Off the UPS

To power off the UPS, you must disconnect it from the AC transfer switch.