A06B-6087-H155 General Electric Fanuc Alpha PSM-55 Power Supply Module For integration within SIMOVERT Masterdrives Motion Control Systems Engineer's Note "Our senior workshop engineer highlights that when dealing with a replacement A06B-6087-H155, you must check the cooling fan status immediately upon startup. In heavy machine tool environments, any dust clogs on the internal heatsink will trigger a rapid thermal alarm, cutting DC link power to protect the module. Always