from
http://www.irritrol.com/pdf/faq_raindial.pdf
What does the blinking FUS code mean?
A. - The controller may have
detected an overload of the
amperage allowed (For example, a
shorted solenoid, a shorted wiring
or a high end surge or spike).
How to reset the FUS code on a
Rain Dial Controller?
If the “FUS” warning does not go
away after pressing either the Plus
(+) or Minus (-) Buttons, follow the
instructions below:
1. While the controller is
power-up, disconnect the
“Ribbon Cable” from the socket on the terminal board.
2. Disconnect the 9 volt battery.
3. Set the “PROGRAM” switch to “B”
4. Set the “MODE” Switch to Set Program (Middle) position between “OFF &
RUN”.
5. Hold down the “MANUAL” button while reconnecting the ribbon cable.
6. Reset Current Time.