Question edited for a lot more clarity, 'make model (what it is), fix typos, capitalize CDU and DCU (not sure which is right, the manual mentions neither).
Question moved from Motorcycles Category to model.
https://www.skcic.com.tw/file/trimble/Trimble%205600%20series_user%20manual_en.pdf
Did you change the internal battery? It sounds like you erased the operating software
Note that the battery change must be made within 2 hours; otherwise the above parameters and functions will be reset.
Contact your local distributor. If these machines are leased like the Leica Total Station, they phone home if you miss a payment or start fiddling with internals and they PUK Lock it on you.
https://www.google.com/search?q=trimble+5605+DR200%2B
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