Hey, I'm wondering if any of you all know how to reprogram a Schindler MPH2 PI? The PI's should all read B,1,2,3 but instead they read 1,2,3,4. Not sure if I need to use the HHT tool or what the process is. I saw something about changing the yellow battery on the MHC board (which appears to be soldered on and i don't know when it was changed last) and the J18 jumper being on A and B which it is. If anyone could guide me in the right direction that would be very helpful.