We've written a number of troubleshooting posts - please read through them and if you don't get an answer to your question, feel free to post a new topic in the relevant forum category.

-- General control box FAQs
No beeps or lights when turning on: link

-- Irrigation control
Calibrating your low water alarm: link
Watering does not happen at expected time: link
Pump running but no water from nozzles: link
Not watering when scheduled but does water manually: link
Device control panel shows "pump fault": link

-- Sensors
Air temperature sensor not showing data: link

-- Beeps and sounds
High/low beeping when pump is running: link