, you must follow a specific sequence, as the controller requires a pre-set schedule to be selected before any customization can occur.
For watering on specific days (e.g., Mon/Wed/Fri).
Ensure the main water supply is open. If only one zone fails, use a multimeter to check the resistance of that zone's solenoid; a healthy Rain Bird solenoid typically reads approximately 20 to 60 ohms . Rain Bird ISA 300 / 400 Series Sprinkler Timer Manual rain bird sprinkler timer isa 304 manual
Turn the dial to Custom Schedule – Duration . Select a station with the arrow keys and adjust its run time from 1 minute to 2 hours. Troubleshooting and Maintenance