You had a similar issue with your previous receiver. Perhaps you may wish to get another check of your dish/cabling. Could be damage/water ingress in the cables which is causing you issues or even faulty LNB.

Found following lines in your log

[Dish] tuning failed
lost lock, trying to retune
[Dish] tuning failed
[Dish] tuning failed
[Dish] tuning failed
[Dish] tuning failed