The vessel temperature has exceeded the maximum limit.
Possible Causes:
The solution level is low in the vessel, but the level sensor is indicating full. The level sensor has two main components that work together. These components are a Level Sensor Module and the Glass Sensor Tip. Refer to and follow the DELTA Service Procedure 007 for Analog Level Sensor Cleaning and Testing.
If the level sensor is not working, it may need replacing. See DELTA Service Procedure 009 to replace the Analog Level Sensor Glass Tip and Fiber Optic Cable (A32).
The vessel is overfilled with solution. The Level Sensor is not detecting solution. See DELTA Service Procedure 007 for Analog Level Sensor Cleaning and Testing.
The motor stopped turning. Check the Packing Nut to make sure it is not over tightened. See DELTA Service Procedure 001.
The motor needs to be replaced. See DELTA Service Procedure 023.