E21 - Overload

What does E21 mean?

The LED display shows E21, indicating an overload condition. This could be due to a sluggish motor or the pump operating outside its specifications, possibly with high module temperature. The pump speed will be lower than normal.

• Sluggish motor
• Pump operated outside specifications
• High module temperature
• Unfavorable ambient conditions

Click steps to track your progress.

1. 1

   Check the ambient conditions around the pump.

2. 2

   Ensure the pump is operating within its specified parameters.

3. 3

   Allow the pump to cool if it has overheated.

4. 4

   Check for blockages or obstructions.