Saeco Minuto, Service Manual

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MINUTO 05 TROUBLESHOOTING
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Check the temperature Check the temperature
The number shows the heater temperature . The number shows the heater temperature .
ERROR: ERROR: In the indication HEATER appears “SHORT”, the NTC In the indication HEATER appears “SHORT”, the NTC
temperature-sensor is shorted, the display backlight changes from temperature-sensor is shorted, the display backlight changes from
green to red; check the wiring from the NTC temperature-sensor to green to red; check the wiring from the NTC temperature-sensor to
the CPU/POWER board (JP13). the CPU/POWER board (JP13).
ERROR: ERROR: In the indication HEATER appears “OPEN”, the NTC In the indication HEATER appears “OPEN”, the NTC
temperature-sensor is detached or broken, the display backlight temperature-sensor is detached or broken, the display backlight
changes from green to red; check the wiring from the NTC changes from green to red; check the wiring from the NTC
temperature-sensor to the CPU/POWER board (JP13). temperature-sensor to the CPU/POWER board (JP13).
Press the Z1 button to switch on the Heater Press the Z1 button to switch on the Heater
The absorbed current ( Amperometer on the main supply) is OK, the The absorbed current ( Amperometer on the main supply) is OK, the
indication HEATER changes from “OFF” to “ON” and the temperature starts indication HEATER changes from “OFF” to “ON” and the temperature starts
increasing. increasing.
If temperature is over 135°C, the backlight change from GREEN to If temperature is over 135°C, the backlight change from GREEN to
YELLOW. This is a ALERT message to avoid heating the HEATER YELLOW. This is a ALERT message to avoid heating the HEATER
element over dangerous temperature. element over dangerous temperature.
ERROR: ERROR: the absorbed current is KO or the temperature does not the absorbed current is KO or the temperature does not
increase; check the wiring from the heater to the CPU/POWER increase; check the wiring from the heater to the CPU/POWER
board (JP19) and the wiring of the NTC temperature-sensor (JP13). board (JP19) and the wiring of the NTC temperature-sensor (JP13).
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