Make sure everything is plugged in correctly before putting the batteries in the remote, then after you put the batteries in and power up the main unit. I think it does a calibration at power up. My direction vane didn't work at first until I replugged everything and gave it a full 360 degree spin and reset. FWIW the direction is done with 8 magnetic reed switches and resistors so it must read the resistance value and use that to compute the direction. The cover comes off the rain guage quite easily so I'd check that as well to see if anything has been displaced in transit.
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