What does the 'drn' or F9E1 error code mean on my washer?

The 'drn' or F9E1 error code indicates a drain pump system problem, meaning the washer is taking too long to drain water. Check that the drain hose is correctly installed and does not extend more than 4.5 inches (114 mm) into the standpipe, the end of the drain hose is not higher than 96 inches (2.4 m) above the floor, and there are no clogs in the drain hose. (Page 19)