Figure 060-11: Pressure-Measuring Instrument And Valve - Miele CVA 2650 Technical Information

Technical Information

Figure 060-11: Pressure-Measuring Instrument and Valve

10. Access service mode as outlined in Section 060-4.5.1 or 060-4.5.2.
11. Select COMPONENT TEST.
12. Select Brew unit (M26), then Cont. downwards. Press and hold the
right switch knob (or the OK touchpad) until the brew unit has been
lowered as far as possible. (CVA 2652/2662: The position "172" for the
position sensor (B10) is indicated in the top right corner of the display.)
13. Turn the right switch knob (or press the < and > touchpads) until Back is
displayed.
14. Press the right switch knob (or the OK touchpad).
15. Coffee/hot-water pump flow rate check:
a. Select Water pump (2M7), then Brew unit (M26). Press and hold the
right switch knob (or press the OK touchpad) and at the same time start
to close the valve until a pressure of 14.5 pounds per square inch (1
bar) is reached.
b. Release the right switch knob (or press the OK touchpad).
c. Place an empty measuring container under the valve outlet.
d. Press and hold the right switch knob for 30 seconds (or press the OK
touchpad). During this time check that a pressure of 14.5 pounds per
square inch (1 bar) is maintained. Adjust the valve if necessary to
achieve this. Severe pressure fluctuations (116 to 232 pounds per
square inch, or 8 to 16 bar) indicate that the coffee/hot-water pump is
defective.
e. After this period, if the measuring vessel contains 2 to 4 fluid ounces
(60 to 120 milliliters) of water, then the coffee/hot water flow rate is in
order.
16. Checking the coffee/hot-water pump and pressure system for leaks:
a. Press and hold the right switch knob (or press the OK touchpad).
After approximately 10 seconds, close the valve.
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CVA 265x & CVA 266x