Learn how to inspect the plus (+) button of a Bezzera Unica espresso machine.
1. Using a 3mm Allen wrench, remove the two 3mm screws that hold on the lower cup warmer.
2. Lay down a towel or foam pad and lay the machine in its back. Using a 3mm Allen, remove the four 3mm Allen screws on the bottom of the machine. Stand the machine upright. The housing has two frame sliders still holding onto the frame of the machine. Tap the top of the housing in the front corners with your palm if they are stuck up, this should allow the housing to drop. It helps to do one side at a time, jiggling the housing up and down a bit while you provide pressure outward to get the frame slider to pop out the housing from the frame. Then simply slide the housing back off of the machine.
3. Use a 3mm Allen wrench to remove the 2 screws for the reservoir support.
4. Pop the clips that hold the hoses on both sides of the res support. Once they have been removed from the plastic clips, pull them out. This will allow you to move the res support off to the side and out of the way.
5. Inspect where the faceplate lines up over the frame. The upper panel should almost cover all of the frame whereas the side of the faceplate sits flush with the frame. Note the metal tab on the side that comes off the faceplate and wraps around the frame. If the faceplate is too far forward then it will not make contact with the button. Push the faceplate into the frame and tighten up that tab if it does not seem tight enough.
6. Label the wires and/or take a picture of the wires and their position going into the PID. Use a small flat head screwdriver to loosen the terminals and slide the wires out. The arrow is pointing to the 2-pin connector for the temperature sensor. That just needs to be pulled out.
7. Use a 3mm Allen to remove the two screws that hold the cover plate on the PID. Once the screws are removed, slide off the plate.
8. The PID is held to the frame by these brass nuts. The brass nights are sometimes finger tight and can be unscrewed easily. If they are too tight the easiest tool is a 6mm deep socket to loosen them. Once removed the PID can be slid off of the posts.
9. Inspect the PID overlay and make sure it is sitting flush against the plate.
10. Inspect the front of the PID and make sure that the PID is sitting flush against the metal cradle. Inspect the buttons and make sure there are no physical signs of damage. Press on the “+” button and make sure it is pressing fine, usually you should have a little click to it.
11. Reassemble the machine, if there were no signs of issues with the PID and the “+” button is still not functioning, then the PID is faulty.