MULTI-C.BUS ERR.

What does 1439 mean?

An error of the multiple CPU high speed main base unit was detected. This refers to an error of the multiple CPU high speed bus, indicating a problem with the physical chassis or the communication backbone in a multi-CPU system.

Click steps to track your progress.

1. 1

   Reset the CPU module and RUN it again. If the same error is displayed again, the CPU module has hardware failure.