Do you have a question about the HYDRO-RAIN HRC 990 04 01 and is the answer not in the manual?
Details the function of each control button (A-G) on the HRC 990 controller.
Explains the operation for each position of the controller's dial.
Defines the meaning of all indicators shown on the controller's digital display.
Step-by-step guide for installing and replacing the controller's batteries.
Instructions for setting the current time of day and the date (year, month, day).
Covers setting start times, frequency (days/interval), and run times for watering.
How to adjust watering duration seasonally and implement a rain delay.
Information on using the controller with an optional moisture sensor module.
Step-by-step guide for connecting the controller to sprinkler valves, including adapters.
Lists and describes available optional hardware accessories for the controller.
Defines terms related to accessories like solenoid adapters and modules.
Troubleshooting for stations not turning on, turning on unexpectedly, or stuck on.
Diagnosing power loss, all stations off, and incorrect station cycling problems.
| Brand | HYDRO-RAIN |
|---|---|
| Model | HRC 990 04 01 |
| Category | Controller |
| Language | English |











