Do these have CSV1 and CSV2 toggling on and off? like a master/slave setup? another thought, if the output stays hi, only as long as the input, it may be out of service for one reason or another. you need to look the I O's over and see if this is the case. Make sure binary counting and such are correct. Is the an HCN input. this cancels hall calls, and is used with the PB1 PB2 PB3 PB4 binary car position. Check closely one may be incorrect and the car would think it is on another floor.