ServerNet Cluster 6770 Hardware Installation and Support Guide

Troubleshooting
ServerNet Cluster 6770 Hardware Installation and Support Guide—522544-002
8-16
Monitoring an AC Transfer Switch
Monitoring an AC Transfer Switch
You can monitor the AC transfer switch using OSM or TSM and the LEDs on the front
panel.
Using OSM or TSM to Monitor an AC Transfer Switch
The following attributes of the Switch object provide information about the AC transfer
switch:
•
Primary Rail Power State
•
Backup Rail Power State
Refer to OSM or TSM online help for more information about these attributes.
Using the LEDs to Monitor an AC Transfer Switch
The front panel of an AC transfer switch includes five LEDs.
Table 8-8. LED 15 on the UPS
Color Meaning Recovery Action
Green LED is
lit, not lit, or
flashing.
This LED provides no useful
information.
No action is required.
Table 8-9. Power-On LED 16 on the UPS
Color Meaning Recovery Action
Green LED is
lit.
Power for a ServerNet II
Switch is available from the
UPS outlet.
No action is required.
Green LED is
not lit.
Power for a ServerNet II
Switch is not available from
the UPS outlet.
Refer to Verifying the AC Power
on
page 8-18.
Figure 8-6. LEDs on Front Panel of an AC Transfer Switch
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