Question about Spidem Trevi Digital Plus Coffee Maker

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Coffee machine is displaying error message "BREWUNIT BLOCKED". Have tried opening up the machine to clean it out but nothing seems to be opening or closing properly!!

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All fully automatic machines have a motorized system to move the brew group from Home (start) position to the Brew position. Pause in the brew position until coffee is dispensed by the pump action.. Then it returns (reverse move) back to the Home position.
In Brands like Saeco, Gaggia and Spidem it is a 33V DC motor that operates this job. The DC motor is fed directly from the Main power board.
When power to this motor is reduced to half or less the Brew group movement is either slowed or stop completely (no DC current coming to the motor). In both of these cases the error message will be the same "Brew group blocked".
Many technicians diagnose this to a faulty motor. That is not correct. New motor does not restore the function or the error message.

To fix the Brew group blocked error I suggest the following:
1- Remove the Brew drive 33V DC motor. Inspect closely to check for definite smoked and burn marks inside its casing. If one can manage it, to power the motor with DC current & see if it operates.

2- I have rarely seen a motor burn out. It is almost 95% times the power from the Control board is reduced or interrupted. A resistor or Triac or both are bad. These two components are screwed tight at the bottom of the large metal heat sink to dissipate heat as fast as possible. These two components overheat fast and stop functioning. The current id reduced to 11 to 16V or fail totally to power the motor.
If one can get these two components replaced, the power to the motor can be restored.

This electronic repair is not easy or cheap. The old models of Vienna, Trevi and Syncrony Logic have Aluminium boilers. The electronic control board for the old models is not available any longer.

The new models of Vienna, Trevi, or Syncrony Logic have a Tubular heat exchanger & a modified control board. The electronic board for new tubular heat exchanger does not work in older models with Aluminium boiler.
Option one: Find an electronic repair service for the power board.
Option two: Trade this machine in for a new machine .

Posted on Oct 25, 2014

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Remove the brew unit and clean the shower screen under the red o-ring, There is also a tube leading from the top of that o-ring to the discharge and is attached with 2 screws, remove screws slowly DO NOT LOOSE THE SPRING AND BALL that is under the fitting, clean out tube and the hole that leads to the screen, that should clear up the problem.

Posted on May 20, 2011

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Posted on Jan 02, 2017

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