Xantrex Technology AGS - Manual (Page 5)

5
THEORY OF OPERATION
System
The AGS system, when in AUTO or AUTO QUIET TIME
mode, continuously monitors the house battery and two air
conditioning/heater thermostats.
If the LOCAL TIME of day is not within the AUTO QUIET
TIME window, it will start the generator to charge the battery
or to cool or heat as required.
The AGS system is invisible to the normal operation of the
auxiliary generator manual start and stop controls with the
following exceptions:
1. If the generator is started by the AGS, which is in
AUTO or AUTO QUIET TIME mode, the selection of OFF at
the AGS Remote Panel will stop the auxiliary generator.
2. If the AGS system commands the generator to start
and it does, the AGS system will stop the generator at the
appropriate time. If the generator stops for some other
reason, even if it is turned Off by a manual switch other than
the AGS, the AGS system will assume that there is a FAULT.
It will turn itself OFF and turn on the GEN FAULT light. At
this point, the AGS system must be turned on to the AUTO
mode or AUTO QUIET TIME mode for it to resume control of
the generator.
Once started by the AGS system, the generator will run for a
minimum of two hours. This will ensure that there is a good
charge in the battery, although it may not be fully charged at
the end of the cycle. If the battery voltage does not reach
13.5 volts during the two-hour period, the generator will
continue to run for an additional two hours. If at the end of
the second two-hour period the battery voltage is still not up
to 13.5 volts, then the AGS systems assumes that there is a
problem and turns the generator OFF. It must be restarted
manually.