‐CW520/530
23
working
Err25 Boilerwaterfillingmalfunction
Theboilerdoesnotfillwithintheallowedtime:check
waterintaketap,dynamicpressure inintakesystem,
cleaning of water intake filter, possible damage to
waterintakehose
Orcheckinthisorder:
‐boilerpressureswitchhasfailed(continuousempty
reading)
‐pipeleaking/disconnected(waterenteringpipe)
Err26 Boileremptyingmalfunction
‐checkthatrinsingsprayarmnozzlesareclean
‐ boiler pressure switch has failed (continuous full
reading)
‐pipeleaking/disconnected(waterenteringpipe)
‐rinsingpumpnotworking
Err27
Boiler emptying malfunction – with
tankfull
Boiler pressure switch has failed (continuous full
reading)
Err28
Boiler heating malfunction
(overheating)
Firstcheck:
‐ boiler pressure switch has failed (continuous full
reading)
‐ pipe leaking/disconnected: water entering pipe
connected to air trap, pressure switch continues to
give full reading even with boiler empty, heating
elementoperatingdry
Or:
‐circuitboardrelayfailure,or
‐contactorfailure
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