Peplink displays fan information “0” rpm and temperature information “-”
That is a curious finding we have not seen. I’d recommend submitting a ticket to Peplink. Include a diag report taken while the issue is seen and and also activate RA.
we have re-uploaded the old firmware 8.2.1. Everything is fine
That’s good to know and good test. I’d still recommend submitting a ticket if the issue reoccurs with 8.3.0.