Descale for Second Generation Software.

This version of the descale process, in it’s entirety, is valid for all Oracle™ machine with a batch code of 1535 and above or if the machine was sent in for service after 08/16/15.

The Descale function can be accessed by going to the advance menu. Turn the machine off using the POWER button. Once the machine is off, press and hold the 1 CUP button and, while holding the 1 CUP button pressed in, press the POWER button. Once in this function, rotate the SELECT dial to dESc, the Descale function then press the SELECT dial. Once in the Advance Menu’s Descale function, the process will be walked through step by step using the illuminated button surrounds. However, some preparation is needed before starting this process. A flat head screwdriver is required to descale the Oracle®.

    Step 1 – Preparation for Descale

    1. Ensure that the drip tray is empty and inserted fully into position.
    2. Ensure the machine is off and has been cooling for at least one hour.
    3. Once the machine is off, press and hold the 1 CUP button and, while holding the 1 CUP button pressed in, press the POWER button. rotate the SELECT dial to dESc, the Descale function, then press the SELECT dial.
    Step 2 – Empty the Boilers

    1. During this step, the main LCD will be blank.
    2. Remove the black silicone cover on the lower front panel marked as ‘DESCALE ACCESS’. Place a cloth over the drip tray, especially where the steam wand is located, to prevent steam from escaping. In order to open the valves completely, the screws will need to be loosened a bit and without the cloth covering that section of the drip tray, the steam could scald when released.
    3. Using the screwdriver, turn the right hand screw counter-clockwise until the valve is completely opened. This will open and empty the steam boiler
    4. Repeat this with the left hand screw as well, this will open and empty the espresso boiler.
    5. Allow the valves to remain completely open until no more steam or water escaped into the drip tray.
    6. Close both valves and re-tighten the screws. Ensure that they are not over tightened as this can damage the valves. Tighten until the screws are firmly seated only.
    7. Empty the drip tray and water tank and remove the water filter. Insert the drip tray fully into place and fill the water tank with the commercial descaling solution adhering to the manufacturers instructions. Fill to the ‘MAX’ level.
    8. Press the 1CUP button to begin the cleaning process.
    Step 3 – Begin Descale

    1. Once the 1CUP button is pressed, a 20 minute timer will begin. The machine will fill the boilers from the water tank that is filled with the descale solution and heat it up to temperature. Water may come out of the group head into the drip tray and this is normal.
    Step 4 – Empty Descale Solution

    1. During this step of the process, the main LCD will be blank.
    2. Empty the water tank of all of the descale solution. Rinse the tank thoroughly and dry then refill with fresh, cold, filtered water.
    3. Repeat Step 2: sections 1 – 5 to remove the descale solution from the boilers.
    4. Empty the drip tray of any liquid in it then reinsert into the espresso machine fully. Exercise caution when emptying the drip tray as the solution will be hot.
    5. Press the 1CUP button.
    Step 5 – Flush the Boilers

    1. During this step of the process, the main LCD will be blank.
    2. Empty and rinse the water tank thoroughly.
    3. Once the 1CUP button is pressed, a 20 minute timer will begin. The machine will fill the boilers from the water tank that is filled with the descale solution and heat it up to temperature. Water may come out of the group head into the drip tray and this is normal.
    4. Assemble a new water filter and insert into the tank. Fill the water tank to ‘MAX’ with cold fresh water and lock it back into place.
    5. Place a cloth over the drip tray.
    6. Using the screwdriver, release the right hand screw by turning counter-clockwise to release any liquid in the steam boiler.
    7. Open the left screw by turning counter-clockwise and release any water in the espresso boiler.
    8. Once no more steam or water are flowing into the drip tray, close both valves by rotating the screws clockwise to tighten firmly but not over-tighten.
    9. Empty the drip tray and reinsert it into position fully. Exercise caution as any liquid in the tray will be hot and could cause scalding.
    10. Press the Power button to complete the descale procedure. The machine will heat up and is ready to use once it attains operating temperature.

Repeat this process twice to ensure that as much scale and mineral build up as possible are removed.