Fault: "Filling Problem" "Drain not closed" What should I do?

When the instrument is turned on, the drain valve opens to vent the vessel. If the drain open/close switch is not sensed by the computer, this fault occurs.

Possible Causes:

(1) Wires on the drain valve have become dislodged. Connections may have become loose. 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 Service Procedure Drain Valve View (Internal) (AS026).

(2) The drain valve or the drain open/close switch is not operating. When the instrument is turned on, the LED on relay #6 should light briefly (see Service Procedure Drain Valve View (Internal) (AS026). At that time, you should hear the drain valve opening. After 10 seconds, the drain valve will close and the LED on relay 6 should light briefly again. 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. Reference FAQ Fault: "Drain Problem" "Ck Sensor" "<START>"

The level sensor is reading a full vessel when it should be empty. Slowly open the vessel and check the level.

If the vessel is actually full, possible causes include:

• The drain hose may be kinked. Remove any kinks.
• The vent valve may not be working. Refer to Service Procedure Water and Vent Valve Service (AS016).

If the vessel is actually empty:  

The level sensor needs to be cleaned and possibly retrained. Refer to Service Procedure Level Sensor (SICK) Cleaning and Testing to service the SICK Level Sensor (Blue model) (AS010). Or, see Service Procedure Level Sensor (Analog) Cleaning and Testing (DES007) to service the Analog Level Sensor (black model).