Communication Fault in Bailey DCS800xA System

Recently we upgrade our system Bailey infi 90 to 800xA system. One of the IMMFP02 replace with BRC410. From last couple of weeks I facing some fault on Node 11, where IMMFP02 installed. In server alarm list Node 11 PCU continuously showing NCOMMERR, but node 11 CPU working normally no fault is there. but in alarm list, it showing continuously ECOMERR. Module in Bad quality.