RainJet RJC Six Timer Flashes Code AO 22

RainJet timer flashes "AO 22" and won't function.

Reset Procedure

Remove backup battery.
Disconnect power for 30+ seconds.
Reconnect power (battery still out). Attempt reprogramming.
Manually run each zone. If a zone causes flashing, that valve/wiring has a short.
If display remains garbled after reset, replace controller. RainBird ESP or Irritrol Rain-Dial recommended.

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