Schindler 330A 3-stop. Car Call not working for 3rd floor. Hall Call for 3 works and Car Calls for 1 & 2 are good. Have rocker switches in Controller for sending car to top & bottom floor and rocker for 3 doesn't work. Can also send it to 3 through the UIT. Disconnected the rocker switch wiring from X1 on the CRIPHNA and still can't get a Car Call for 3. Any ideas? Is it bad CRIPHNA? Or a bad CPB board?