Install Guide

CAUTION: DO NOT mix airow directions. The airow directions are color coded. A red label indicates that hot air is

expelled from the PSU and a blue label indicates that hot air is expelled from the I/O. Both power supplies must use the

same airow direction (I/O to Utility or Utility to I/O). The power supplies and fans must have the same color strap. If

you mismatch the airows, the following error message appears and the system shuts down:

00:02:19: %S5000:0 %CHMGR-2-PSU_TYPE_AIRFLOW_MISMATCH: Mismatching PSU airflow

detected. Unit 0 shall get shutdown in next 60 seconds if mismatch not rectified.

00:02:19: %STKUNIT0-M:CP %CHMGR-1-PSU_AIRFLOW_COMBO_MISMATCH: Major alarm: Mismatching

PSU airflow detected in unit 0

Installing an AC Power Supply

1. Remove the PSU from the electro-static bag.

2. Use the grab handle to slide the PSU into the switch PSU slot (install the PSU-exposed PCB edge connector rst). The PSU

slot is keyed so that the PSU can be fully inserted in only one way. When you install the PSU correctly, it snaps into place and is

ush with the back of the switch.

Figure 15. Installing an AC Power Supply

Slot 0 (for AC PSU 0) 2. Release latch

3. Plug in the AC3 prong cord from the switch PSU to the external power source (the AC wall outlet).