### MP-523 RS-232 host interface failure

On an MP-30 system, diagnostics on the MP RS-232 interface board port 3 failed. The board may have failed or may not be installed in the MP.

On an SMP system, diagnostics on the host RS-232 interface on the amp/check/divide card has failed.

Refer to MP Error Codes for additional information.

What you should do

1. Call your Giddings & Lewis service representative.