PS6610 Hardware Owner's Manual  4  Maintain Power Supply Units 
Table 10:  Power Supply Features 
Color 
Item  LED/Control  Description 
(State) 
1  Used to remove PSU from array 
PSU fault. PSU not supplying power. 
2 
PSU firmware is downloading 
Release latch  none 
PSU fault 
Amber 
(steady) 
Amber 
(flashing) 
AC fault 
Amber 
(steady) 
Amber 
(flashing) 
Power OK 
Green 
(steady) 
Green 
(flashing) 
Power Cord 
Connector 
none 
AC power is not detected. 
3 
PSU firmware is downloading. 
This PSU is providing power. 
4 
AC power is present, but this PSU is in standby mode. The other 
PSU is providing power 
5  Connect the provided power cord. 
(Off)  No power supplied to unit 
6  Power Switch 
(On)  Unit is powered on and operational 
Remove a Power Supply Unit 
Although an array can operate with only one working power supply unit, you should replace the failed 
unit as soon as possible. For proper array cooling, do not remove a failed power supply unit until you 
are ready to replace it. 
How to Remove a Power Supply 
Wear electrostatic protection when handling a power supply and cooling module. See Hardware 
Protection on page 6. 
To remove a power supply: 
1.  Turn off the power switch on the power supply. 
2.  Disengage the hook-and-loop fastener from around the power cable. 
3.  Remove the power cable. 
4.  With your right hand, hold the handle and push the orange release latch (callout 1 in Figure 23) to 
the right with your thumb. 
5.  Pull the module from the slot, as shown in Figure 23. 
Caution:  The PSU is heavy. Support it with two hands. 
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