IOU module stops working must be replaced.

Issue

IOU module(s) attached to CX9900 or CX9680 keep dying, some with blinking status light others just show online but cannot drive outputs on it.

Product Line

Andover Continuum

Environment

CX9900

CX9680

Lon IOU modules

Cause

Static electricity discharging on the module via wire of Fan drive controller.

Resolution

  1. Disconnect offending wire at the source.
  2. Re-route wire so it does not cause static discharge on the IOU modules.
  3. Make sure the IOU modules are properly attached to earth ground as per the installation instruction.