Your boiler is currently cooling itself down by running the water pump after a heating cycle, which is a normal part of the system's operation.

Pump over run

What causes this fault?

This status occurs when the boiler is trying to move excess heat away from the internal heat exchanger after you have finished using hot water. It usually happens because the water isn't circulating quickly enough through the internal bypass or the pipes to cool the system down. The most common reasons are a pump that is starting to struggle or a slight internal blockage that restricts the flow of water.