Boesch Exxcel 1100 w/machine reduced time malfunction?

With the reduced time function selected the ‘Ready in’ display shows 0.58 (but the Reduced Time indicator light is not on). When the ‘Ready in’ time indicator reads 0.00 (after a period of 0.58 mins) the wash programme is still going and after a short time the ‘Ready in’ indicator will read 1.58 and it then completes the programme in that time so in total takes 2 hrs to complete a wash.