HYDRAULIC MACHINE WITH CONTROLLABLE VALVES AND METHOD FOR IDLING SUCH A HYDRAULIC MACHINE

Idling a hydraulic machine includes electronically controlled high and low-pressure valves, a control system arranged to control opening and closing of said valves, a first idle safety valve arrangement arranged between the first working chamber and a fluid sink with a pressure equal to or lower than the high pressure, operating the hydraulic machine in an empty cylinder idle mode, wherein the high and low-pressure valves are concurrently closed for at least a whole cycle of the varying volume, and releasing hydraulic fluid to the fluid sink only when fluid pressure in the working chamber increases above a set threshold and the empty cylinder mode is enabled, enabling the first idle safety valve arrangement when the hydraulic machine operates in the empty cylinder idle mode, and disabling when not.