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You have 2 start times per day. Both will run all zones sequentially.
The Rain Bird ISA 304 is a 4-station indoor automatic sprinkler controller. It is an "easy-set" logic timer designed for residential use.
| Problem | Likely Solution | |---------|----------------| | Timer won’t turn on | Check power cord/outlet. Ensure transformer is plugged in. | | No watering at set time | Dial must be in AUTO. Check start time pins are pushed in. | | Watering runs too long/short | Recheck SET WATERING TIME dials. | | Watering happens on wrong days | Adjust skipper pins in SET DAYS BETWEEN. | | Manual mode runs briefly then stops | Turn dial to AUTO after manual start; the timer may be mid-cycle. | rain bird sprinkler timer isa 304 manual
After reading the standard manual, use these pro techniques to supercharge your ISA 304:
The Rain Bird ISA 304 was a workhorse of its time—reliable, simple, and effective. If yours still runs, consider yourself lucky. If you are searching for the manual because it stopped working, the troubleshooting guide above should resolve 80% of issues. For the remaining 20% (fried circuit board or failed transformer), replacement is more cost-effective than repair. You have 2 start times per day
Need further help? Contact Rain Bird Support at 1-800-RAIN-BIRD (1-800-724-6247) – but be prepared that they may no longer support ISA-specific parts.
Because this model is discontinued (replaced by the SST and ESP series), finding a paper manual is difficult. However, several repositories hold the original document. To set Start Time #2:
To download a genuine PDF of the Rain Bird sprinkler timer ISA 304 manual:
Warning: Avoid scam sites asking for $29.99 for a "download code." This manual is copyright-free for personal use as the product is obsolete.