Chapter 4 Fault diagnosis
SMSO-2-02.04- 15.07.03
Power PCB / unit control system /
Power relay
Faulty fuses
Faulty relay or power transistor
Faulty EEPROM
Faulty power relay
Grinder
Grinder blade worn
Foreign bodies
Faulty motor / gear
Piston motor
Faulty motor / gear
Faulty control system / power PCB
Brewing unit
O ring defective or worn out
Inlet / outlet piston dirty
Faulty microswitch for start position
Faulty brewing cylinder, scratched
Brew pipe Clogged / dirty (coffee grease)
Bent (wrong pipe feed)
User panel
Buttons jam / foreign bodies caught in the panel
The keyboard PCB is damp
Brewing valve /
Additional water valve
Valve seat clogged and not water-tight (calcium)
Faulty coil
Faulty seal on closing element
Booster Clogged (coffee grease)
Over-temperature safety activated
Instant heater
Calcium on heating
Faulty heating
Faulty temperature sensor
Heat damage caused by over-heating
Safety thermostat
Triggered as a result of over-temperature
Faulty / faulty contacts
Non-return valve / Baffle
Calcium / not water-tight
Flowmeter
Turbine wheel jamming
Baffle clogged (calcium)
Faulty sensor
Outlet cup Clogged / dirty / faulty
Inserted at an incline
Brewing valve relief pipe Clogged / dirty (coffee grease)
Submerged in siphon in water
Motor Faulty capacitor
Faulty RC module
Control set O-ring defective
Too much / not enough grease
Rotary-vane type pump Clogged (calcium)
Worn out (dry running)
Faulty bearing (noisy)
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