Power Failures

Due to the possibility of power failures, the controller has nonvolatile memory to preserve the program indefinitely. If no 9-volt battery is installed, the controller will freeze time when the power goes out and resume, keeping time after power has been restored. If a battery is installed, the 9-volt battery back up will keep time so the clock and calendar will be intact for up to three days. There is no default program so there will be no surprise watering.