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 Botanic Garden >> Gardening >  >> Question and Answer >> Irrigation

Reviving or Replacing a Legacy Hardie HHA 11272 Controller After Power Outage

1991 Hardie Controller Blank After Power Loss; Ribbon Cable Unplug Stops It

Test the controller:

  1. Remove the backup battery.
  2. Disconnect AC power for 1 minute.
  3. Reapply power without the battery.
  4. If display returns, controller is okay. If blank, replace it.

Recommended replacements: Irritrol Rain Dial or Rain Bird ESP series.

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