SC672 occured when controller-to-operation panel communication error at startup After powering on the machine, the communication circuit between the controller and the operation panel is not opened, or communication with controller is interrupted after a normal startup.
.Controller stalled
.Controller board installed
incorrectly
.Controller board defective
.Operation panel connector
loose or defective
Make sure that the MBU is seated correctly. If not, SC672 occurs look at the picture to see what im talking about.
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