Rain Bird Sprinkler Timer Isa 304 Manual Verified May 2026

The Rain Bird ISA 304 is a 4-station, single-program indoor automatic sprinkler timer designed for simple residential irrigation management. While discontinued by the manufacturer, it remains a common legacy device valued for its straightforward rotary dial interface. ⚙️ Technical Specifications Capacity: Controls up to 4 watering zones (stations).

Manual Start: Quickly initiate a watering cycle for a specific station without affecting scheduled programs. rain bird sprinkler timer isa 304 manual

. Select a station (1–4) and use the arrows to set how many minutes it should run. Watering Days The Rain Bird ISA 304 is a 4-station,

• Controller not turning on: Check power supply, ensure correct voltage, and verify connections.
• Zones not watering: Check zone wiring, ensure correct zone settings, and verify program schedule.

6 Pre-Set Schedules: Includes five interval-based programs and one "Custom" (C) option for specific days of the week. Controller not turning on : Check power supply,

...and I can find the exact troubleshooting step from the Rain Bird Support Center for you. Rain Bird ISA 300 / 400 Series Sprinkler Timer Manual

Select a Schedule: Turn the dial to Pre-set Schedules. Use the arrow keys to choose between schedules 1–5 or "C" for a custom schedule. Schedule C: Allows you to pick specific days of the week.

1. Set the Current Time

• Turn the main dial to SET CURRENT TIME.
• Rotate the outer (station) dial clockwise until the correct time aligns with the fixed triangle mark. Note the AM/PM indicator on the dial face.