NAiS FP Series, User Manual

Page: 75 / 326

FP
Σ
Installation and Wiring
5 - 26
5.7.3 Lifetime of Backup Battery
The life of the backup battery will eventually expire and therefore it is important to
replace it with a new battery periodically. Refer to the table below for a guide as to when
to replace the battery.
Item Description
Battery lifetime 220 days or more (typical lifetime in actual use: approx. 840 days
at 25
°
C/70
°
F) (Suggested replacement interval: 1 year)
(Value when no power at all is supplied)
Maintenance battery
Name Part No.
Battery for FP
Σ
AFPG804
Notes
If system register “No. 4 Alarm Battery Error” is set to “ON”,
special internal relays R9005 and R9006 will go on if the
battery voltage drops, and the ERROR/ALARM LED will flash.
The battery remains effective for about a week after the alarm
is issued, but in some cases the problem is not detected
immediately. The battery should be replaced as soon as
possible, without turning off the power supply.
When replacing the battery, connect the new battery within 20
seconds of removing the old one.