Rain Bird Sprinkler Timer Isa 304 Manual ^new^ May 2026

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

Includes five interval-based schedules (e.g., every 2nd or 3rd day) and one "Custom" schedule for specific days of the week.

Allows users to increase or decrease watering times globally in 10% increments to account for seasonal changes. rain bird sprinkler timer isa 304 manual

Turn the dial to Custom Schedule – Starts . You can set up to three start times per day in 15-minute increments.

Press again to set the hour and then the minutes. Ensure the AM/PM indicator is correct. Turn the dial to Auto/Run to save. Step 2: Select a Watering Schedule Turn the dial to Custom Schedule – Duration

, you must follow a specific sequence, as the controller requires a pre-set schedule to be selected before any customization can occur.

Turn the dial to Custom Schedule – Days . If using Schedule C, use the arrows to toggle each day "On" or "Off". Allows users to increase or decrease watering times

Turn the dial to and use the arrows to choose your baseline:

If your system fails to run as expected, check these common issues: