Franke Troubleshooting Assistant

Brew unit did not reach commanded position within travel timeout — mechanical bind from coffee grounds, worn BU bearing, foreign object in the chamber, or failed gear motor / position sensor; remove the BU, clean thoroughly with Franke detergent, inspect gears and seals, and verify the position-sensor connector before electrical diagnosis.

Brew-unit gear motor over-current or open-circuit — typically follows a seized BU after long-overdue cleaning; if the BU is mechanically free and the motor still trips, ohm-test the motor windings and check the harness from the control board to the motor for chafing or a loose connector.

Grinder ran longer than the allowed time without delivering target dose — hopper empty or bridged beans (most common), worn burrs grinding too coarse, foreign object jamming the burrs, or hardened oil residue from stale beans; clear hopper, remove burrs, vacuum chamber, and rotate or replace burrs per the wear guide before suspecting the motor.

Grinder motor drew over-current and tripped — stones or other foreign matter in the bean stream are surprisingly common; only after the chamber is verified clean should you suspect the grinder driver board or motor itself.

Brewing-water boiler temperature probe out of range (open / short / impossible value) or timeout-to-setpoint — ohm-test the NTC against Franke's resistance-vs-temperature chart, verify heating-element draw and the safety thermostat is not tripped, and check for descaling overdue causing thermal insulation in the boiler tank.

Steam-boiler temperature probe fault or did-not-reach-setpoint timeout — same diagnostic family as the water boiler but on the separate steam circuit; the steam boiler also has its own pressure-relief and safety-thermostat chain that must be considered before concluding probe / element fault.

Milk pump running but no flow detected, or pump over-current — air leak in the silicone suction line, kinked or pinched milk hose, worn pump impeller, or empty milk container; replace silicone hoses on a 6-month interval and verify the cooler temperature is 3–5 °C.

CAN-bus or harness-level communication fault between the head unit and the side-mounted FoamMaster milk cooler — inspect the cooler-to-machine cable for damage and re-seat both connectors; persistent fault after cable check usually indicates a failed cooler interface board.

Time / volume-based descaling counter has expired — not an active fault but escalates to a hard lockout on newer firmware if ignored; run the guided descaling cycle (30–60 min including rinse) using Franke-approved descaler, never an off-brand acid that can damage seals.

Water-filter volume counter has reached the configured limit — install a new cartridge of the correct hardness rating for the inlet water, reset the volume counter in the technician menu, and confirm the filter type; selecting the wrong hardness causes the next exhaustion alert to fire too early or too late.