Replacing a power supply

About replacing a power supply

Replacing a power supply in a FAS270/270c, or in a DS14mk2 disk shelf, consists of the following procedures:

When replacing the power supply in your appliance, observe the following rules:

You do not need to turn off the power to the appliance when you replace one power supply at a time.
If you are replacing both power supplies, replace them one at a time to avoid powering down your appliance.
Although a single fan failure in one of the power supplies is not a critical event, it is recommended that you install a new power supply when one of the two fans in either power supply stops working.
When hot swapping power supplies, replace and install the power supplies within two minutes of each other.
Caution
Your appliance can run with one power supply for a maximum of two minutes. The airflow through your appliance is degraded when only one power supply is present and operating. Therefore, if the power supplies are not replaced within two minutes of each other, the system halts and no data is accessible.

Have the replacement power supply close by and ready to install before removing the old one.

To remove a power supply, complete the following steps.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	Turn off the switch on the power supply that you are replacing.
3	Lift up the clip lock and unplug the power cord from your appliance's power supply.
4	At the top of the rear of the unit, using your thumb and index finger, press the cam mechanism levers toward each other to release the power supply handle.
4	The following figure shows how to press the levers on the cam mechanism and release the power supply handle.
5	Use the handle to pull the power supply out of the appliance. WARNING When removing a power supply, always use two hands to support its weight.

To install a power supply, complete the following steps.

Caution
Do not use excessive force when sliding the power supply into your appliance. You can damage the connector.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	Slide the power supply into the power supply bay until you hear the power supply connect with the connector inside your appliance chassis.
3	Raise the handle while pressing the cam mechanism levers toward each other, and push the power supply handle into place. The following figure shows how to raise the handle into place.
4	Plug the power cord into the power receptacle and fasten it with the clamp.
5	Plug the other end of the power cord into a grounded AC power source.
6	Turn on the power switch and confirm proper operation by checking the power supply LEDs. See Monitoring the power supply.
7	After turning on your system, run diagnostics. See the Diagnostics Guide for more information.