Fault: "Hit Enter" "Open Failure." What should I do?

The drain valve has been told to open but after 30 seconds the drain-open switch has failed to open the drain.

Possible Causes:

(1) The wires on the drain valve have become disconnected. Unplug the instrument, check the drain valve and reattach any loose wires. Check blue wire (I1), yellow wire (I2), black wire (4), and red wire (4). Refer to DELTA Service Procedure Drain Valve View Internal

(2) The drain valve or the drain open/close switch is not operating. When the instrument is turned on, the red light on relay #6 should be lit (see DELTA Service Procedure Drain Valve View Internal DES026). At that time, you should hear the drain valve opening. After 10 seconds, the drain valve will close. If the drain valve is not operating, it will need to be replaced. If the drain valve is operating but does not stop, then the open/close switch is not detected by the computer. Unplug the instrument and check the drain valve for any loose wires.