Rain Dial RD-600 Flashing Display After Year of Non-Use

An RD-600 unused for a year now flashes display when attempting manual, semi-auto, or timed runs. Station timer resets to OFF, time flashes rapidly, station numbers flash above time.

Standard Reset Procedure

1. Remove 9V battery
2. Disconnect AC power for 1 minute
3. Reconnect AC power with battery still out
4. Test operation

If Flashing Persists During Zone Activation

When you try to run a station and the display flashes, it indicates a short circuit on that zone - either a bad solenoid or damaged wiring. The controller detects excessive current and shuts down.

Isolating the Faulty Zone

1. Disconnect all zone wires from controller
2. Reconnect one zone at a time
3. Test manual run for each
4. The zone that triggers flashing has the fault

Fix Options

• Replace the solenoid on the faulty zone (~$15)
• Trace and repair wiring if solenoid tests good (20-60 ohms)
• If multiple zones flash, the controller panel itself may need replacement