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6 Maintaining Your System
Battery Replacement 69
Quick Reference Guide
Battery Replacement
The processor module uses two user-replaceable AAA alkaline batteries. These
batteries provide enough power to retain the system programming settings
during a power failure for 45 days to six months, depending on the freshness of
the batteries. When battery power is getting low, the system displays a ChgBat
W/PowerOn or ReplaceSysBat W/Power On message on the top line of
display telephones at extensions 10 and 11 in place of the default day/date/time
message. You should replace the batteries within 45 days of seeing the
message.
CAUTION:
Do not turn off the power or remove the processor module before replacing
the batteries! If you do, all settings for system and telephone programming
revert to the factory settings. If you have a Backup/Restore PC Card, do a
backup before changing the batteries.
Change the batteries in the processor module every year, even if the system has
not yet displayed the ReplaceSysBat W/Power On message. Choose good
quality alkaline batteries. (See “Inserting Batteries in the Processor Module” on
page 19.)
The message may flicker on and off as the batteries approach the
low-power threshold.