Fault indications and troubleshooting
8
Service instructions
5015108-00 Edition 0403
Fault code Fault Comment
F21 Booster tank slow to fill If filling (-B11) takes longer than 10 minutes, a fault code is generated.
Possible action:
a. Check that the shutoff valves are open and that water is reaching the machine.
b. Check that the solenoid valves open and that their filters are not clogged.
F23 High conductivity The conductivity (-U01) is higher than the set value after the third repeat rinse.
Possible action:
a. Check that the correct type of water is connected.
F24 Low pressure in dryer The differential pressure (-B03) is <150 Pa .
Possible action:
a. Check whether the fan, hoses or filter(s) are faulty.
b. When changing a filter, check that the new filter is correctly installed.
F25 High pressure in dryer The differential pressure (-B03) is > 750 Pa .
Possible action:
a. Check whether the filter is clogged.
F26 Low pressure from circulation pump The pressure (-B04) is <30 kPa.
Possible action:
a. Check the docking between machine and wash rack.
b. Check that the pump impeller rotates easily.
c. Check the direction of rotation (see installation instructions).
d. Check that the detergent is not foaming.
F27 High pressure from circulation pump The pressure (-B04) is > 130 kPa.
Possible action:
a. Check that no nozzles in the washing arms are blocked.
F28 Low temperature in dryer The temperature (-B05) has not risen to 20 degrees C below the set value after
two minutes.
Possible action:
a. Check that there is power on all phases up to the element.
F29 Faulty temperature sensor in booster tank. The temperature (-B06) is <0 °C or >130 °C.
Possible action:
a. Check the temperature sensor (for open-circuit or short-circuit)
F30 Faulty temperature sensor in washing chamber The temperature (-B07) is <0 °C or >130 °C.
Possible action:
a. Check the temperature sensor (for open-circuit or short-circuit)
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