Richdel Controller Flashing "FUS": Replace Solenoid on Indicated Valve

If your Richdel 6-station controller flashes "FUS" (or "FUS" + a number), it means: Short circuit on that valve's solenoid. The internal breaker tripped.

What to Do

1. Note the valve number displayed (e.g., "4 FUS" = valve 4).
2. Identify the wire color on that controller terminal.
3. Find the corresponding valve in the valve box.
4. Replace the solenoid (~$8 at Home Depot).

Why Not a Fuse?

Richdel uses an automatic resetting PTC breaker, not a replaceable fuse. "FUS" = "Fuse Tripped" = short detected.

After Replacement

Controller will auto-reset. Test the zone manually.