Oracle ZFS Storage Appliance Service Manual page 181

ensure proper air flow. A faulted power supply is indicated by an amber-colored status LED.
Use the following procedure to replace a 7x20 power supply.
Gain access to the rear of the storage controller where the faulted power supply
1.
is located.
2. If a cable management arm (CMA) is installed, press and hold the CMA release
tab and rotate the arm out of the way.
3. Disconnect the power cord from the faulted power supply.
4. Shut down the controller using one of the power-off methods described in
"Powering Off the Controller" on page
Replacing a 7x20 Power Supply
50.
Servicing the 7x20 Controller 181