I get it byt its give me just 90 barAre you setting the relief to the hammer's operating pressure or setting it higher? Check the hammer's operating manual, it usually lists a relief valve setting, typically about 750-800 PSI higher than operating pressure. If its set at operating pressure you are constantly running the unit over relief.
Never trust that in-cab display, they are whack well over 90% of the time. Get a flow meter on the aux circuit to verify proper pressure/flow to hammer.
