Problem 13 - No water flow from the group head.
There are several reasons for lack of water flow from the group while trying to brew.
1. The flowmeter is clogged with hard water scale deposits.
2. The group valve is faulty or clogged.
3. The banjo tube and/or bolt is clogged with coffee grounds due to the group be
brewed with without the diffuser screen and screw installed.
Solution 1 - Inspect the flowmeter for scale build-up.
Solution 2 - Inspect the group valve for proper operation.
Solution 3 - Inspect the group for a missing diffuser screen and screw. Unclog the
banjo tube if necessary.
Refer to Problem 1, Solution 2 for detailed instructions.
Refer to Problem 11, Solution 1 for detailed instructions.
If espresso is brewed on a group head in which the diffuser screen and screw are not installed,
coffee grounds will get sucked into the banjo nut and tube due to the back pressure of water
exiting the group valves discharge.
Important! - Before proceeding with solution 3, the following steps must be accom-
plished.
1. Turn off the main water supply to the machine.
2. Locate the expansion valve in the drain box.
3. Turn the barrel of the expansion valve counter-clockwise to releive pressure in the
front boiler.
4. When the lower portion of the gauge reads 0 bar, you may proceed.
1. Remove the machines top panel.
2. Remove the three 6mm allen head screws that secure the group cap to the group.
3. Gently pry the group cap from the group head.
4. Using a 24mm socket, remove the banjo nut.
5. Clean any compacted coffee from the banjo nut and set aside.
6. Using a 17mm wrench, remove the group valve discharge fitting from banjo tube inlet.
7. Using a 20mm wrench, remove the nut securing the banjo tube to the group.
8. Remove the banjo tube and remove any compacted coffee using a stiff but flexible wire.
9. Reassemble the group and check for proper operation.
