Those who install and voice electronic organs (especially) and even pipe organs sometimes set the organ volume too loud. If a pipe organ is voiced too loud, it must be revoiced. Professionals must be consulted for all stages of this complex and expensive procedure.
The volume of an electronic organ can usually be adjusted easily by an organ technician, with the assistance of the organist:
Until this adjustment is made, you will have to pull the expression pedal(s) partially closed to achieve a convincing organ volume every time you play.