Seagate Exos X 4006 Series Hardware Installation And Maintenance Manual page 113

LED
Type PSU fault AC fault PSU OK
Color Amber
Flashing
State
On*
Off
Off
An important feature of the storage enclosure design is redundancy. The enclosure will maintain continuous operation during
the replacement of a single PSU, if it is within the time limit of 7 minutes, since removal of a PSU significantly reduces airflow in
the storage enclosure.
CAUTION Use only power cords supplied in the installation kit or those that meet product specifications.
CAUTION Adhere to power source and power connection requirements to avoid harm to equipment.
Only connect the power supply unit (PSU) to power sources that comply with product specifications and labels.
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Always remove all power connections before you remove a PSU from the storage or expansion enclosure.
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CAUTION If you remove any FRU while the storage enclosure is powered up, you must replace it with a tested, good
spare within the allotted time for that FRU. If you do not replace the FRU and, when applicable, fully close the related drawer
within the identified time limit, you void the product warranty and the storage enclosure might overheat, causing equipment
failure and possible data loss.
CAUTION Do not remove covers from any FRU. There is a danger of electric shock inside. Return the FRU to your
supplier for repair.
To replace a power supply unit:
1. Retrieve the new PSU in its static-protected container, ready to access and use the new PSU immediately upon removal of
the faulty one.
113 Chapter 11 In-service field maintenance for 5U enclosures
Status
N/A
Amber Green
Off AC power not present
On* Off PSU present, but not supplying power
Off Firmware download to PSU in progress
Off On AC power present, power switch is on, providing power
Off Flashing AC power present, PSU on standby, other PSU providing power
On* Communication with AP controller module (CM) lost
N/A Off PSU hardware fault
On* Off PSU alert state or hardware fault: over temperature, over voltage, or over current
On* Off AC power failed, PSU not providing power, other PSU providing power
On* AC power failed, PSU running on battery
Figure 88 Power supply unit fault LEDs