Installing A Fan Module; Backup Battery - NEC Express 5800/140Rb-4 Service Manual

Installing a Fan Module

NOTE
If you are replacing a failed fan, wait for the fan status indicator to turn off.
Generally, this will take less than ten seconds.
To install a fan, follow these instructions:
1. Remove the rear access cover (page 31).
2. Place the fan module into the empty slot of the fan assembly. Be sure that the airflow direction
arrow is pointing toward the rear of the chassis (Figure 38, A).
3. Check the fan status indicator for the replacement fan. If the installation was successful, the
indicator will not be lit.
4. Install the rear access cover.

Backup Battery

The lithium battery on the baseboard powers the real-time clock (RTC) for up to 10 years in the
absence of power. When the battery starts to weaken, it loses voltage, and the server settings stored
in CMOS RAM in the RTC (for example, the date and time) might be incorrect.
For a list of approved replacement batteries, contact your customer service representative or dealer.
WARNING!
Danger of explosion if battery is incorrectly replaced. Replace with only the
same or equivalent type recommended by the manufacturer. Dispose of used
batteries according to the manufacturer's instructions.
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun
ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til
leverandøren.
ADVARSEL!
Lithiumbatteri - Eksplosjonsfare. Ved utskifting benyttes kun batteri som
anbefalt av apparatfabrikanten. Brukt batteri returneres apparatleverandøren.
VARNING!
Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en
ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt
batteri enligt fabrikantens instruktion.