Power-Supply Unit Leds - IBM Storwize V7000 Maintenance Manual

2. At least one power supply in the enclosure must indicate Power supply OK or
52
Storwize V7000: Troubleshooting, Recovery, and Maintenance Guide
Table 18. Power-supply unit LEDs (continued)
Power
supply
Fan
ac failure
OK failure
Off On Off
On Off Off
Off Off On
Off On On
Flashing X X
Off Flashing Flashing
Power supply firmware downloading for the node canisters to operate. For this
situation, review the three canister status LEDs on each of the node canisters.
Start with the power LED.
Table 19. Power LEDs
Power LED
status Description
Off There is no power to the canister. Try reseating the canister. Go to "Procedure:
Reseating a node canister" on page 60. If the state persists, follow the
hardware replacement procedures for the parts in the following order: node
canister, enclosure chassis.
dc failure
Status
On No ac power to
this power
supply
Off Power supply is
on and
operational.
Off Fan failure
On Communication
failure and
power supply
problem
X No canister is
operational.
Flashing Firmware is
downloading.
Action
1. Check that the switch
on the power supply
unit is on.
2. Check that the ac
power is on.
3. Reseat and replace
the power cable.
No actions
Replace the power
supply unit.
Replace the power
supply unit. If replacing
the power supply unit
does not fix the problem,
replace the enclosure
chassis.
Both canisters are either
off or not seated
correctly. Turn off the
switch on both power
supply units and then
turn on both switches. If
this action does not
resolve the problem,
remove both canisters
slightly and then push
the canisters back in.
No actions. Do not
remove ac power.
Note: In this case, if
there is a battery in a
power supply unit, its
LEDs also flash.