You have done a search for - say - "Panasonic NV-HD600 hot" haven't you?
I did and found this:
https://www.elektrotanya.com/panasonic-nv-hd600.pdf/download.html
Flicking through the manual doesn't show a=ny fan, form which one would suggest the "Hot" error is referring to a motor, possibly a solenoid or a device probably just on a heatsink.
This is interesting https://www.maritv.net/Public/data/remlab/201254115232_Difetti%20VCR.pdf - are you sure the error message isn't "H02" or "HO2"? - that is a capstan error on a similar model.
There may be results out there which could be found with similar searches.
XXX
February 2017