Test Procedures - DeLonghi EN660 Service Manual

9.2 Procedure to check for water leakages and pump pressure
1. Open the machine .
2. Disconnect the heating elements and isolate them.
3. Prepare an empty jug under the discharge tube.
4. Press button to open fake capsule connector by opening the clamps (fig 1 ).
5. Insert the faked capsule inside the MBU, and block it by releasing the button (fig. 2).
6. Make sure the faked capsule is well placed and fixed ( fig. 3 ).
7. Switch the machine on.
8. Open the tap.
9. Press the coffee button and let the water flow to the jug for about 10 seconds.
10. Close the tap.
11. The pressure will start to rise, getting stable between 16 and 19 bar.
Checkthe water pump pressure ( fig 4 ).
12. Check all the hydraulic connections for water leakages.
13. If , after having checked all parameters, the pressure of the pump is under 16 bars, change the pump.
Fig 1
Fig 2
50
!
The residual pressure must be released
after the test by opening the valve!
The pump is permitted to be in operation
for max. 50 sec. without an outlet.
Fig 3 Fig 4