Beko wtb1041r4w, electrical buzzing

[St3v3]

Hi All, thanks in advance for your help. We have a Beko washing machine wtb1041r4w,  when it is powered on at the socket there is an electrical noise, the washing machine cycles are not effected at all-no problems, my thoughts are relay of some sort! ? or some sort of electrical arcing which I would presume would trip the circuit breaker, any thought, thanks