Fault Cause
Varying cup filling volume
Overpress
ure valve
More water in drip tray
Overpressure valve does not
seal / calcified
No suction when pump is in
operation
Runs dry / Not de-aerated
before initial heating.
Inject water jet while pump is
in operation.
Defective pump Dry coffee in dregs drawer / water
low indicator (fault LED)
Thermal fuse defective
Pump
Water leakage at overpressure
valve threaded joint
Hairline crack in joint area
Turbine calcified / other
deposits
Flow meter
Different cup filling volumes -
Water low indicator flashes
Hall sensor defective
Float not watertight
Float jammed
Magnet in float too weak
Electronic system defective
Float
WATER LOW INDICATOR
indicator
(water level over reserve)
Reed sensor defective
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