Juniper SRX5800 Hardware Manual page 300

To upgrade a services gateway that has three or four standard-capacity AC power supplies to two or four
high-capacity AC power supplies:
CAUTION:
power supplies and high-capacity AC power supplies are installed in the services
gateway at the same time.
1. Ensure that the services gateway is running Junos OS Release 10.4 or later. Earlier Junos OS releases
do not support high-capacity AC power supplies.
2. If you have not already done so, replace both standard-capacity fan trays with high-capacity fan trays.
Also replace the standard-capacity air filter with a high-capacity air filter. For more information, see
"Replacing an SRX5800 Services Gateway Fan Tray" on page 268
Gateway Air Filter" on page
3. Check the LEDs on all of the installed power supply faceplates to ensure that they are operating properly.
4. If there are four standard-capacity AC power supplies installed, remove the standard-capacity AC power
supply installed in the PEM0 slot. See
on page 278 for instructions on removing AC power supplies. If there are only three standard-capacity
AC power supplies installed in the services gateway, proceed to the next step.
5. Install a high-capacity AC power supply in the vacant slot in the back of the chassis. See
SRX5800 Services Gateway AC Power Supply" on page 281
supplies.
6. Check the LEDs on the high-capacity AC power supply faceplate to ensure that it is operating properly.
7. Identify the slot for the next high-capacity AC power supply:
If the slot you installed the power supply into in
AC power supply in either slot PEM1 or PEM3
If the slot you installed the power supply into in
AC power supply in either slot PEM0 or PEM2
8. Remove the standard-capacity AC power supply from the slot you identified in step7. See
an SRX5800 Services Gateway AC Power Supply" on page 278
supplies.
9. Install a high-capacity AC power supply in the slot you identified in Step 7. See
Services Gateway AC Power Supply" on page 281
Limit to five minutes or less the time during which standard-capacity AC
274.
"Removing an SRX5800 Services Gateway AC Power Supply"
and "Replacing the SRX5800 Services
for instructions on installing AC power
5 is PEM0 or PEM2, install the next high-capacity
5 is PEM1 or PEM3, install the next high-capacity
for instructions on removing AC power
for instructions on installing AC power supplies.
"Installing an
"Removing
"Installing an SRX5800
301