Saeco Minuto, Service Manual

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MINUTO 05 TROUBLESHOOTING
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Start condition Start condition
Press the ESPRESSO button to open the Electro Valve Press the ESPRESSO button to open the Electro Valve
IMPORTANT NOTE: If the DREGDRAWER is not inserted or the DOOR is not IMPORTANT NOTE: If the DREGDRAWER is not inserted or the DOOR is not
closed the EV test cannot be performed. If these 2 inputs are not in the closed the EV test cannot be performed. If these 2 inputs are not in the
right position, a warning message will be shown and the display turns to right position, a warning message will be shown and the display turns to
yellow. yellow.
Press the STEAM button to switch on the pump Press the STEAM button to switch on the pump
The water goes out from the pipe and the indication The water goes out from the pipe and the indication IMP IMP shows shows
increasing numbers. The indication L/H must be within the range 10-18. increasing numbers. The indication L/H must be within the range 10-18.
It is possible to hear the “click” from Electro Valve. The indication beside It is possible to hear the “click” from Electro Valve. The indication beside
the the EV1 EV1 changes from “OFF” to “ON”. changes from “OFF” to “ON”.
ERROR: ERROR: The display backlight changes from green to red and the The display backlight changes from green to red and the
impulse remains 0; If water comes out the pipe: check the wiring from the impulse remains 0; If water comes out the pipe: check the wiring from the
fl owmeter to the CPU/POWER board (JP5). If no water comes out the pipe: fl owmeter to the CPU/POWER board (JP5). If no water comes out the pipe:
check the pump and the wiring from the pump to the CPU/POWER board check the pump and the wiring from the pump to the CPU/POWER board
(JP24). (JP24).
ERROR: ERROR: The L/H is zero or very low; the Electro Valve does not The L/H is zero or very low; the Electro Valve does not
open. Check the wiring from the Electro Valve to the CPU/POWER open. Check the wiring from the Electro Valve to the CPU/POWER
board (JP3) and the Electro Valve. board (JP3) and the Electro Valve.
Press the STEAM button to switch on the grinder Press the STEAM button to switch on the grinder
The grinder rotates and in the indication GRINDER the number
increasing up to 40. The other numbers inside the GRINDER box are not
important for this test.
ERROR: ERROR: The number remains 0 or the grinder does not run, the The number remains 0 or the grinder does not run, the
display backlight changes from green to red; check the Hall sensor display backlight changes from green to red; check the Hall sensor
board of the Grinder, the Grinder, the wiring from the Hall sensor board of the Grinder, the Grinder, the wiring from the Hall sensor
board to the CPU/POWER board (JP2) and the wiring from the board to the CPU/POWER board (JP2) and the wiring from the
Grinder to the CPU/POWER board (JP8) Grinder to the CPU/POWER board (JP8)
Initial status Initial status
20
Operational check - solenoid valves and pump
Press STAND_BY “ Press STAND_BY “ ” to move to the next screen ” to move to the next screen
Operational check - coffee grinder and boiler