Fixing dripping de'Longhi coffee machine

はじめに

The De’Longhi Icona range of home espresso machines have many variants, but most of the differences are merely cosmetic, the internal workings are almost identical.

The one pictured is an ECOV310.GR

There are several common faults which are easily fixed.

This Fixit is concerned with dripping from the water outlet, which can be caused by scale build up or by wear to the valve.

Water comes through as soon as you turn the machine on, before enough pressure is built up in the boiler.

必要な工具と部品

手順1 Before you start

Fixing dripping de'Longhi coffee machine, Before you start: 手順 1、 1の画像 1

My Icona coffee machine.
These machines use a solenoid pump and a pressurised boiler.
WARNING!!! BEFORE STARTING, MAKE SURE THAT THE MACHINE IS TURNED OFF AND FULLY COOLED DOWN. RELEASE ANY PRESSURE BY OPENING THE STEAM VALVE. THESE MACHINES HAVE A LOT OF PRESSURE STORED UP IN THE BOILER.

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手順2 Valve parts

Fixing dripping de'Longhi coffee machine, Valve parts: 手順 2、 2の画像 1

Fixing dripping de'Longhi coffee machine, Valve parts: 手順 2、 2の画像 2

One common problem with these machines is dripping from the outlet.
Before attempting this repair, it is worth de-scaling the machine first, as that can often cure it. De-scaling solutions are available on-line or in hardware stores, and are easy to use. You can also just use a vinegar and water mixture.
The parts involved are a conical valve spring, a brass collar and a silicon rubber valve head. The valve stops water coming through before there is sufficient pressure. Sometimes the collar is missing, they can corrode away over time.
The second picture shows the 3 parts assembled correctly.

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手順3 Removing the base(optional)

Fixing dripping de'Longhi coffee machine, Removing the base(optional): 手順 3、 3の画像 1

Fixing dripping de'Longhi coffee machine, Removing the base(optional): 手順 3、 3の画像 2

Fixing dripping de'Longhi coffee machine, Removing the base(optional): 手順 3、 3の画像 3

You may be able to do this without removing the coffee maker's base, but it is a lot easier with it out of the way, and the pictures are clearer.
There are 8 screws, indicated by arrows in the pictures 4 Phillips No2 in the central area, and 4 Torx T20S2 security screws in recesses around the sides.
To remove the Torx screws, you can use a Torx security screwdriver as pictured. If you do not have one, it is possible to remove the screws by using a 2.5mm flat bladed screwdriver which is just the right size to fit between 2 lobes and the central pin in the screw head.

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手順4 Removing the Diffuser

Fixing dripping de'Longhi coffee machine, Removing the Diffuser: 手順 4、 1の画像 1

Next, undo the Phillips No2 screw in the centre of the diffuser plate and remove the plate.

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手順5 Removing the brass dowel screw

Fixing dripping de'Longhi coffee machine, Removing the brass dowel screw: 手順 5、 1の画像 1

Now we can see the brass dowel screw. (you may have to clean the area first). Remove it using a wide flat bladed screwdriver.

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手順6 valve removal

Fixing dripping de'Longhi coffee machine, valve removal: 手順 6、 1の画像 1

We can now see the base of the valve spring. Remove it, but be careful not to lose the valve head or collar

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手順7 Clean and reassemble

Fixing dripping de'Longhi coffee machine, Clean and reassemble: 手順 7、 1の画像 1

Cleaning all the parts, and perhaps just stretching the spring a little before reassembling, may be sufficient if the mushroom shows no sign of wear.

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終わりに

To reassemble your device, follow these instructions in reverse order, be sure to replace the valve with the silicon mushroom facing into the opening, and be careful screwing in the brass dowel screw, as it is easy to cross thread it.

2 の人々がこのガイドを完成させました。