2-6
Table 2-2. Power Supply Troubles (continued)
Type Trouble Message Possible Causes / Troubleshooting
Battery Low
Indicates the battery voltage is low (less than 22.8 V), battery standby
is running low, and action is required.
Note that this may or may not indicate a problem. Do the following:
• Note the time of the Battery Low event and determine if the battery
has charged since the event occurred. If the battery is charging,
allow it to charge for a full 48 hours and then check the voltage of
each battery separately.
• If this event occurs without an AC Power fail (check the panel’s
history log for AC power failure events), suspect either bad
batteries (i.e., won’t hold a charge) or a battery charger problem.
See the battery charger troubleshooting in the “Battery
Depleted/Disconnected” trouble.
Battery
Depleted/Disconnected
Indicates the battery has a voltage less than 19.5 V. Do the following:
• Check the voltage at the battery terminal block on the SFIO board.
The voltage should be 27.6 VDC (+/- 200 mV). If voltage is
present, but less than 27.6 VDC, use R256 to adjust the charger
voltage. See “Battery Charger Trouble” description later in this
section.
• Check the fuse and replace if necessary.
• Check the voltage of each battery separately from the other
battery. If one battery is good and the other is bad, replace both
batteries. (Note: Batteries are always replaced as a set.)
Power
Supply
Points
Battery Low Cutout
This trouble only occurs if the Depleted Battery system option is
enabled. Indicates the battery has reached a depleted state, and the
system will function in one of two ways:
• Shut the system down. This is the ULC-required operation for
Canada. Depleted Battery system option requires a special wiring
harness to function in this way.
• When an alarm occurs, the system does not energize the panel’s
NAC circuits. This functionality occurs when the Depleted Battery
option is enabled, but the special harness is not used.
Continued on next page
Power Supply Troubles, Continued
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