[CA] [CA11] Quantum Radar not Rotating

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Quantum Wireless Radar T70166. Installed new in July 2017. It seemed to be working fine, however hardly needed to use it except for occasionally having it on to get used to the display.
Last summer we were in thick fog, and of course it failed. First it would not turn on. I had to turn the power off and on a couple of times to get it to respond. But then I got the message that it would not rotate.
I tried this week, testing all equipment on the boat, and it the radar did turn on, and connect, (using WiFi connection), but again the message, "Radar not turning".
Is this a problem with the unit itself. Does it need lubrication ? Whey wouldn't it rotate ?

Does it need to be removed and taken in or is there something that can be done while in place ?

Any suggestions please.... Thanks