The HRC 100 Controller requires a CR2032 Lithium battery for proper operation. The battery will maintain your program in case of an AC power loss and should last approximately one year.
- Open by sliding the battery tray out to the right
- Insert one CR2032 battery into the compartment with the + side up
- Slide back into place.
A weak or missing battery can cause the time, date, and program to be erased after a power failure. If this happens, you will need to install a fully charged battery and reprogram the controller.
Tip: Replace the battery every year, to avoid loss of programming
Note: A battery alone will not operate the valves in your sprinkler system. The sprinkler controller has a built-in transformer that must be connected to an AC line voltage source.
