Rain Bird Sprinkler Timer Isa 304 Manual May 2026

To check individual heads, use the Test mode. This will automatically run each zone for two minutes, allowing you to walk the yard and check for leaks or clogs.

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

, you must follow a specific sequence, as the controller requires a pre-set schedule to be selected before any customization can occur. rain bird sprinkler timer isa 304 manual

Instantly suspends watering during wet weather while retaining all saved program data.

Allows users to increase or decrease watering times globally in 10% increments to account for seasonal changes. To check individual heads, use the Test mode

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

Includes five interval-based schedules (e.g., every 2nd or 3rd day) and one "Custom" schedule for specific days of the week. You can set up to three start times

Uses a standard battery to preserve your clock and program settings for up to six hours during power outages. Quick Setup & Programming Guide To program the

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

Turn the dial to ; the display will begin flashing.