Rain Bird SST900IN Manual: A Comprehensive Guide
This manual provides detailed instructions for the Rain Bird SST900IN timer, assisting homeowners and professionals in setup, programming, and troubleshooting irrigation systems effectively.
Overview of the Rain Bird SST900IN Timer
The Rain Bird SST900IN is an “Simple to Set” indoor timer designed for residential and light commercial irrigation systems. It offers a user-friendly interface, making programming straightforward for both beginners and experienced users. This timer controls sprinkler zones and drip irrigation, automating watering schedules to conserve water and maintain healthy landscapes.
As highlighted on the Rain Bird support page, the SST series prioritizes ease of use. It’s ideal for homeowners seeking a reliable and simple solution for managing their lawn and garden watering needs, eliminating the need for manual operation and ensuring consistent hydration.

Key Features and Benefits
The Rain Bird SST900IN boasts several key features, including independent programs for flexible scheduling, and multiple start times per program for customized watering. Its simple interface, as noted by Rain Bird support, allows for quick and easy programming. Benefits include water conservation through automated schedules, reduced manual effort, and a healthier, more vibrant landscape.
Further advantages encompass seasonal adjust to adapt to changing weather conditions and a rain delay function to prevent overwatering during precipitation, ultimately saving water and money.

Understanding the Display Panel
The Rain Bird SST900IN features a user-friendly display panel crucial for operation. It presents vital information like the current time, date, and active program status. Familiarizing yourself with the display is the first step to effective programming. The panel clearly indicates watering schedules, durations, and any active features like rain delay.
Understanding the icons and their meanings, detailed in the manual, is essential for interpreting the timer’s settings and ensuring optimal irrigation performance.
Display Icons and Their Meanings
The SST900IN utilizes several icons to convey information quickly. A watering can icon signifies an active watering cycle, while a cloud icon indicates a rain delay is engaged. A clock icon represents programmed schedules, and a battery icon displays the remaining battery life.

A flashing icon often signals a setting that requires attention or a potential issue. Refer to the complete icon legend within the manual for a comprehensive understanding of each symbol’s specific meaning and function.
Button Functions Explained
The “Program” button initiates schedule programming, allowing adjustments to watering durations and frequencies. “Set” confirms selections and advances through programming steps. “Manual” enables on-demand watering for individual zones, overriding scheduled programs; “Mode” toggles between Auto, Hold, and Rain Delay functions.
The “Up” and “Down” arrows adjust values like time, date, and watering durations. Understanding each button’s function is crucial for efficient timer operation and customized irrigation control.
Initial Setup and Programming
Begin by connecting the SST900IN to a power source and verifying the display illuminates. Initial setup involves setting the correct time and date, ensuring accurate scheduling. Programming watering schedules is straightforward; assign zones, define start times, and specify watering durations.
Carefully review each step to avoid errors. The “Program” button is key to accessing these settings, allowing for customized irrigation tailored to your landscape’s needs.
Setting the Current Time and Date
To set the current time and date on your Rain Bird SST900IN, press and hold the “Set” button until the time display flashes. Use the “Hour” and “Minute” buttons to adjust the time accordingly. Repeat this process for the date, utilizing the “Month,” “Day,” and “Year” buttons.
Confirm each selection by pressing “Set” again. Accurate time and date settings are crucial for proper scheduling and automated watering functionality.
Programming Watering Schedules
Programming watering schedules on the Rain Bird SST900IN is straightforward. Press “Program” and select a desired program number. Then, set the start time using the “Hour” and “Minute” buttons. Next, define the watering duration for each zone using the “Minute” and “Hour” options.
Select watering days by pressing the corresponding day buttons. Remember to save your program by pressing “Program” again to activate the schedule.
Advanced Programming Options
The Rain Bird SST900IN offers advanced features for customized irrigation. Utilize multiple programs to manage different watering needs across your landscape. Set various start times within each program for flexible scheduling.
Employ the “Seasonal Adjust” function to increase or decrease watering duration based on weather changes. The “Rain Delay” feature temporarily suspends schedules after rainfall, conserving water. These options optimize water usage and promote healthy plant growth.
Multiple Programs and Start Times
The SST900IN allows up to three independent programs (A, B, and C), ideal for distinct watering zones with varying plant types and sun exposure. Each program can have up to four individual start times, providing exceptional scheduling flexibility.
This capability enables you to water different areas of your yard at different times of day, optimizing water distribution and plant health. Utilize this feature to tailor irrigation precisely to your landscape’s unique requirements.
Seasonal Adjust and Rain Delay
The Rain Bird SST900IN features a Seasonal Adjust function, allowing you to globally increase or decrease watering duration based on changing weather patterns – conserving water during cooler months. The Rain Delay feature temporarily suspends scheduled watering for a specified duration, typically after rainfall.
These tools prevent overwatering and promote efficient water usage, adapting your irrigation schedule to real-world conditions and contributing to a healthier, more sustainable landscape.

Troubleshooting Common Issues
This section addresses frequent problems encountered with the Rain Bird SST900IN timer. Common issues include the timer failing to power on, often due to a disconnected transformer or faulty power supply. Another frequent concern is programs not running as scheduled, potentially caused by incorrect programming or a low battery.
Carefully review the programming and power connections before seeking further assistance. Refer to the detailed solutions provided within this manual for effective resolution.
Timer Not Powering On
If the Rain Bird SST900IN timer isn’t powering on, first verify the transformer is securely plugged into a working electrical outlet. Check the transformer’s output voltage matches the timer’s requirement. Inspect the wiring connections between the transformer and the timer for looseness or corrosion.
A blown fuse within the transformer or a completely failed transformer are also potential causes. Consider testing with a known working transformer to isolate the issue.
Program Not Running as Scheduled
When a program isn’t running as scheduled on the Rain Bird SST900IN, confirm the program is enabled and the start time is correctly set. Verify the current time and date are accurate, as this impacts scheduling. Check for any active rain delay or seasonal adjust settings that might be overriding the program.
Inspect valve wiring for breaks or shorts, and ensure each zone’s start time isn’t conflicting with another program’s schedule. A low battery can also cause erratic behavior.
Battery Replacement and Maintenance
Maintaining the Rain Bird SST900IN timer involves periodic battery replacement to ensure reliable operation. The timer utilizes two AA alkaline batteries, providing backup power during outages and preserving programmed schedules. Replace batteries annually, or when the low battery indicator appears on the display panel.

Regularly clean the timer’s exterior with a damp cloth; avoid harsh chemicals. Store the unit in a dry location when not in use, protecting it from extreme temperatures and moisture.
Recommended Battery Type
For optimal performance and longevity of your Rain Bird SST900IN timer, we strongly recommend using high-quality alkaline AA batteries. Avoid using rechargeable, heavy-duty, or lithium batteries, as they may not provide the correct voltage or have a consistent discharge rate.
Specifically, Duracell or Energizer brand AA alkaline batteries are ideal choices. Using the recommended battery type ensures accurate timekeeping and prevents potential damage to the timer’s internal components.
Cleaning and Storage Instructions
To maintain your Rain Bird SST900IN timer, periodically clean the exterior with a damp cloth. Avoid using harsh chemicals or abrasive cleaners, as these can damage the plastic casing. Ensure the timer is powered off before cleaning.
For long-term storage, remove the batteries to prevent corrosion. Store the timer in a cool, dry place, away from direct sunlight and extreme temperatures. Proper storage will ensure reliable operation when you need it again.
Wiring and Valve Compatibility
The Rain Bird SST900IN timer is designed to work with standard 24VAC irrigation valves. Proper wiring is crucial for reliable operation. Always consult a qualified electrician if you are unfamiliar with electrical work.
Ensure correct polarity when connecting valve wires to the timer terminals. The SST900IN supports both normally open (NO) and normally closed (NC) valves. Refer to detailed wiring diagrams for specific configurations and valve compatibility information.
Zone Wiring Diagrams
Typical zone wiring involves connecting a common wire to the timer’s “C” terminal and individual valve wires to numbered zone terminals. For a single valve, connect the valve’s positive wire to a zone terminal and the negative wire to “C”.
Multiple valves require a separate wire for each, connected to individual zone terminals. Always double-check wiring before powering on the system. Incorrect wiring can damage the timer or valves. Diagrams illustrate common configurations for easy installation.
Compatible Valve Types

The Rain Bird SST900IN timer is designed to work with most standard 24VAC sprinkler valves, including Rain Bird, Hunter, and Toro models. It supports both electric and mechanical latching valves, offering broad compatibility. Ensure valves have appropriate current draw within the timer’s specifications.
Avoid using valves requiring higher voltage, as this can damage the SST900IN. Confirm valve compatibility before installation to guarantee optimal performance and prevent system malfunctions.
Rain Sensor Connection
Connecting a rain sensor to the SST900IN timer automatically suspends watering during rainfall, conserving water and preventing over-saturation. Locate the sensor terminal on the timer’s control panel. Typically, this involves connecting two wires from the rain sensor to the designated terminals.
Ensure the sensor is wired correctly; incorrect wiring can disable the rain delay function. Refer to the rain sensor’s manual for specific wiring instructions and proper placement for accurate rainfall detection.
Wiring a Rain Sensor to the SST900IN
To wire a rain sensor, first disconnect power to the SST900IN timer. Locate the “Sensor” or “SEN” terminals on the timer’s circuit board. Connect the common wire from the rain sensor to one of these terminals; Then, connect the normally closed (NC) wire to the other sensor terminal.
Securely fasten the wires to prevent loose connections. Double-check the wiring diagram in both the timer and sensor manuals before restoring power. Proper wiring ensures the rain sensor functions correctly, overriding scheduled watering during wet conditions.
Testing the Rain Sensor Functionality
After wiring, test the rain sensor by manually activating it – simulate rainfall by wetting the sensor’s surface. Observe the SST900IN display; the “Rain” indicator should illuminate, confirming the sensor is recognized. Initiate a watering cycle to verify it’s immediately suspended by the sensor’s activation.
Deactivate the sensor by wiping it dry. The “Rain” indicator should disappear, and the timer should resume its programmed schedule. Consistent testing ensures reliable operation, preventing unnecessary watering during precipitation and conserving water resources.
Factory Reset and Clearing Memory
A factory reset restores the Rain Bird SST900IN timer to its original default settings, erasing all programmed schedules and customized configurations. This is useful for resolving persistent programming errors or preparing the timer for a new installation. To initiate, locate the reset button (consult the unit’s diagram) and press it firmly for several seconds.
Confirm the reset by observing the display returning to its initial setup screen. Remember, this action is irreversible, so back up critical settings if possible before proceeding.
Procedure for Performing a Factory Reset

To perform a factory reset on your Rain Bird SST900IN, first ensure the timer is powered on. Locate the small recessed “Reset” button, typically found on the timer’s front panel or side. You’ll likely need a straightened paperclip or similar small object to access it.
Press and hold the Reset button for approximately five seconds. The display will flash and revert to the initial setup screen, indicating a successful reset. All programmed data will be erased, returning the timer to its original factory defaults.
Recovering from Programming Errors
If you encounter programming errors with your Rain Bird SST900IN, a factory reset (as detailed previously) is often the quickest solution. This clears all existing schedules and allows you to start fresh. Alternatively, carefully review each programmed setting, comparing it to your desired watering plan.
Manually adjust any incorrect start times, durations, or zone assignments. If issues persist, consult the Rain Bird support website for specific error code explanations and troubleshooting guidance.
Warranty Information and Support
Rain Bird provides a warranty on the SST900IN timer, protecting against manufacturing defects. Specific warranty details, including duration and coverage, are available on the Rain Bird website or within the product packaging.
For technical support, troubleshooting assistance, or to access frequently asked questions, visit the Rain Bird support page (https://www.rainbird.com/products/sst-series-simple-set-indoor-timer/support). You can also contact Rain Bird customer service directly for personalized help.
Rain Bird Warranty Details
The Rain Bird SST900IN timer is warranted against defects in materials and workmanship for a period of one year from the date of purchase. This warranty covers repair or replacement of the product, at Rain Bird’s discretion.

Damage due to improper installation, misuse, abuse, or acts of nature is not covered. Proof of purchase is required for all warranty claims. Visit the Rain Bird website for complete warranty terms and conditions and claim procedures.
Contacting Rain Bird Support

For assistance with your Rain Bird SST900IN timer, several support options are available. Visit the Rain Bird website at https://www.rainbird.com/products/sst-series-simple-set-indoor-timer/support for FAQs, manuals, and troubleshooting guides.
You can also contact Rain Bird’s customer support team directly via phone or email. Details for these contact methods are readily available on their official website’s support section.