Hardware Reference Manual

56 Brocade VDX 8770-8 Hardware Reference Manual

53-1002564-04

Determining the status of a power supply

Figure 17 shows a power supply.

FIGURE 17 Power supply

For absent or faulty indications, if the power supply is not improperly seated, contact the Brocade

VDX 8770-8 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.

1 AC power input LED (AC OK) 3 Alarm LED (ALM)

2 DC power output LED (DC OK)

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.