DJB-4

We have a question regarding the communication to the DJB-4.
We where making stress test of our application and found some error messages in the manual that we could find no reference for anywhere else in the manual. I would like to know if the errors 1, 2 and 3, are limited to only appearing in a special mode or if they can appear when we do the general polling of the DJB-4.
I would also like to know if we should send an "ACK" to accept the error and continue, or if we should reset the DJB-4.

Answer:

Error 1 shows a bad Rom (code) memory.
You have to acknowledge the error for the DJB to continue.
Error 2 shows a bad internal ram memory.
You have to acknowledge the error for the DJB to continue.
Error 3 not found it ... Are you sure for the error number?