Programming Under Battery Power - Rain Bird ESP-LX Installation, Programming, & User Manual

Programming Under Battery
Power
You can remove the front face panel of the controller and install a
9-Volt battery. You can then program the unit under battery power.
This feature can be useful if the controller is installed in an area that
is not readily accessible. This feature also lets you enter program
information before installing the controller at the job site.
Although you can program the controller under battery power, you
cannot operate it on battery power alone. Connect the controller to
an AC power source as soon as possible.
NOTE: All program information is stored in non-
volatile memory so it will be preserved indefinitely in
the event of a power outage.
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ESP-LX Modular Controller