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Electronic Theatre Controls Inc

Sensor rack flooded with Dimmer over temperature messages

Issue

Sensor Rack control module flooded with over temperature messages. 

Explanation of Issue

Overtemp messages are a polled message, where the CEM  repeatedly asks the dimmers if they are in an overtemp state, then the overtemp line is toggled to read the answer.  

Solution

The steps below outline how to find which module is causing the overtemp:

  1. Turn of main rack breaker.
  2. Turn off all module breakers.
  3. Pull out all the dimmer modules about 1/2".
  4. Turn on main breaker.
  5. Push in one module. 
  6. Wait several minutes.  
  7. If there is no error try another, and repeat until you find the module that is pulling down the overtemp line.
  8. Replace the power cube in the module that is pulling down the overtemp line.

Note: with 50A and 100A modules turn off the main breaker before pushing them in the rack.

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