For watering on specific days (e.g., Mon/Wed/Fri).
This tells the system when to begin the watering cycle. You can have multiple start times (e.g., morning and evening). rain bird sprinkler timer isa 304 manual
The ISA 304 offers six preset schedules (1-6) and one "Custom" (C) option. For watering on specific days (e
The Rain Bird ISA-304 manual outlines a simple setup process: The ISA 304 offers six preset schedules (1-6)
Given its age, you might wonder if replacing the ISA 304 is better than repairing it. Here is the manual’s unspoken advice:
Turn the dial to and use the arrows to choose your baseline:
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | Power outage or dead internal battery | Check circuit breaker. Replace 9V backup battery. If still blank after AC power restored, controller is dead. | | No water to one zone | Faulty valve, wiring, or ISA 304 triac | Swap the suspect zone wire with a working zone on the timer. If problem moves to new zone → timer is bad. | | Watering starts at wrong time | AM/PM mis-set or power interruption lost time | Reset clock and start times. Replace backup battery. | | Zones won't turn off | Stuck solenoid valve OR controller stuck ON | Turn dial to OFF. If water stops → controller faulty. If water continues → valve problem. | | Fuses blow frequently | Short in valve wiring | Locate buried wire splice. Check resistance across valve wires (should be 20-60 ohms). |