Center-staple knife drive motor malfunction
<When FS-526+SD-508 is installed> • The center fold knife home sensor (PS34) is not turned ON even after the set period of time has elapsed while the center fold knife motor (M32) is energized. <When FS-527+SD-509 is installed> • The center fold plate home sensor (PS47) is turned neither ON nor OFF even after the set period of time has elapsed after the center fold plate motor (M26) is turned ON.