Issue
Control trouble # 87 displays Battery Trouble.
Probable Cause:
The battery failed a battery test
The battery is defective
The wiring to the battery is disconnected
Solution:
If there has just been a power failure, wait a least 24 hours for the battery to recharge, then perform a system reset to re-test the battery and clear the error
Replace the battery.
Check wiring.
Issue
What is the Battery Charging Voltage on a D8112 Control Communicator?
Solution
The float voltage for the Battery Charging Circuit on a D8112 is 13.9 VDC at a maximum current of 1.4 Amps. The actual current available can be found by deducting any continuous load from 1.4 Amps.
Part numbers D8112, D8112E, D8112E1, D8112G, D8112G1, D8112G2