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8-8 SPARC Enterprise M8000/M9000 Servers Service Manual • October 2012
8.2 Active Replacement and Hot Replacement
Caution – Each cabinet contains multiple FAN units so that the cooling specifications are
satisfied even when one individual fan inside the FAN units fails. However, a single cooling
fan failure requires the whole FAN unit replacement in a prompt manner. When replacing
multiple FAN units, replace one at a time.
The active replacement procedure and hot replacement procedure for the FAN units are the
same.
The procedure is as follows.
1. Unlock and open a door of the server. (See Chapter 5)
Caution – Before touching a FRU or dummy (filler) unit, see Section 1.4, “Antistatic
Precautions” on page 1-9 and be sure to wear the antistatic wrist strap. Failure to do so might
result in serious damage to operating domains.
2. Use the maintenance menu to select a swap target FAN unit. (The maintenance menu
is used up to Step 9.)
The fieldeng permission is required for executing this command.