Cause
Special drain feature, not an error, indicates that the unit has timed out, and is automatically draining the water in the unit.
Solution
If the washer is paused during a cycle for more than 4 – 8 minutes, the cycle will be canceled and any water remaining in the tub will be drained.
If the washer is powered on and left idle for 4-8 minutes without starting a cycle. In both cases “dr” will display to identify the action of the unit.