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When the device is powered on, the PSU AC and DC LEDs on the PSU back panel
should turn green to confirm that the PSU is correctly installed and supplying
power.
Attention: If you do not install a PSU in a slot, you must keep the slot panel in
place. If you run the device with an uncovered slot, the system will overheat.
Installing and replacing a fan tray on the 4002-Y2B and 4002-Y4B
Figure 27. Installing a fan tray on the 4002-Y2B and 4002-Y4B
The fan tray is hot-swappable and can be replaced while the device is powered on.
If the device remains operational during fan tray replacement the procedure must
be completed within 30 seconds.
To install a fan tray in the switch, do the following steps.
1. Remove the previously installed fan tray from the slot by removing the two
2. Before opening the package that contains the new fan tray, touch the bag to the
3. Remove the fan tray from the antistatic shielded bag.
4. Holding the fan tray level, guide it into the carrier rails on each side and gently
5. When you are sure the fan tray has properly engaged the connector, tighten the
Note: The fans are controlled by software, and their speed is set according to the
Installing and replacing a fan tray on the 4002-Y2A, Y4A, Y2C, and Y4C
Attention: For the 4002-Y2A, Y4A, Y2C, and Y4C devices, be sure that the airflow
direction of the power supply unit matches that of the installed fan tray. The
power supplies and fan trays are clearly labeled with an arrow with an "E" or an
"I", as shown in Table 2 on page 3.
24
Ethernet y-series Installation and User Guide: Installation and User Guide
screws with a crosshead or Philips #2 screwdriver.
switch casing to discharge any potential static electricity. Using an ESD wrist
strap during installation is recommended.
push it all the way into the slot, ensuring that it firmly engages with the
connector.
retainer screws to secure the fan tray in the slot.
environmental temperature surrounding the switch.
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Troubleshooting
