Technical data

Brocade VDX 8770-4 Hardware Reference Manual 53
53-1002563-05
Determining the status of a fan
4
For absent or faulty indications, if the power supply is not improperly seated, contact the Brocade
VDX 8770-4 supplier to order replacement parts. You may also want to do this if the indication is
predicting failure.
Table 14 describes the power supply LED patterns and the recommended actions for those
patterns.
Determining the status of a fan
Complete the following steps to determine the status of a fan.
1. Check the LED indicators on the fan (refer to Figure 18). The LED patterns may temporarily
change during POST and other diagnostic tests; for information about how to interpret the LED
patterns, refer to Table 16. The Brocade VDX 8770-4 has up to two fans. Be sure to check each
module.
2. Check the fan status using the show environment fan {rbridge-id rbridge-id | all} command.
TABLE 13 Output for show environment power command
Output Explanation
OK Power supply is functioning correctly.
absent Power supply is not present. Could also be
improperly seated.
unknown Unknown power supply unit installed.
predicting failure Power supply is present but predicting failure.
faulty Power supply is present but faulty (no power cable,
power switch turned off, fuse blown, or other
internal error). Could also be improperly seated.
TABLE 14 Power supply LED descriptions
LED purpose Color Status Recommended action
AC OK No light
(LED is off)
Power supply does not have
incoming AC power.
If using AC power, ensure that the
power supply is firmly seated, the
AC power source is live, and the
power cable is connected.
Steady green Power supply has incoming AC
power.
No action required.
DC OK No light
(LED is off)
The DC output is not in the
acceptable range.
Ensure that the power supply is
firmly seated.
Steady green The DC output is in the
acceptable range.
No action required.
ALM No light
(LED is off)
The power supply has not failed. No action required.
Steady amber The power supply has failed. Replace the power supply.