My system displays the alarm 'Blower GB1 motor protective switch activated or error frequency controller'. What does this mean and how can I remedy it?

My system displays the alarm 'Blower GB1 motor protective switch activated or error frequency controller'. What does this mean and how can I remedy it?

This means that there is an error indicated on the frequency controller for the blower or that the breaker for the blower has tripped, this can be caused by excessive load or wear on the blower or by a power surge or fluctuation.

To rectify the issue, open the electrical cabinet and locate the frequency controller, it is typically labeled ‘U1’. Note the error displayed on the controller. Then turn circulation off. Verify the box filters are clean and change if needed. With circulation off reset the controller by pushing the appropriate key on the controller. Once the code is cleared turn circulation back on.  

If the issue persists contact M. Braun Service with the project number of your glovebox and the error code from the controller. 

If the LCD on the controller is off, contact M. Braun Service.