I have an Otis 411mms and it randomly shuts down on a fire recall. It'll run for a few hours or sometimes run for weeks. Until all of a sudden, I come in and find it on the 2nd landing (primary floor) with the doors open on "phase 1 recall" while the controller displays SES. When i find it on recall, I'm able to turn on phase 2 and run it as fire recall is intended. I can also just reset it with the keyswitch or with a M151, but it will eventually go right back to recall randomly. I've replaced almost everything on it - even things that have nothing to do with the FIB board or fire recall. I've checked the keyswitch itself, I've had building personnel check and verify it isn't their smoke heads, I've replaced the batram chips, I've replaced ALL batteries in the controller, swapped out CPU board, swapped RCB. swapped SOM, replaced almost all contactors and relays, and even moved the input/output for the RSL and modules for recall on the FIB. Recently i just burned new EPROMs for the CPU, FIB, RCB, and MLB board. I'm at a lost. Any and all help is immensely appreciated.
