comfort pro apu no heat no ac no fan but panel is on and apu starts

My APU comfort pro unit turns on and everything well, but when I click AC or HEAT or FAN inside the panel nothing turns on or works and it stays at the main screen. Any1 knows why or how to fix it? thank you

volvo vnl 670 2016

 

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yeah, the panel works and it starts the apu outside but once i click any function outside of menu etc it doesnt kick anything on and it just kinda refreshes and goes back to the main menu.
u mean the board hvacs relays or the fuse outside at the APU side ? ive checked 1 glass fuse at the board and its fine the rest are all relay box fuses.