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Bosch SRU53E05AU Repair Instructions page 50

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Limescale (see additional information in the general repair
instructions)
Customer complaint
Limescale on the utensils
815_58300000120057_ara_en_d.doc – 25.05.11
Cause
Hardness range incorrectly set or untreated water hardness >
50 °dH, check residual hardness in the wash and final rinse
cycles
Does not regenerate
Untreated water valve does not open -> appliance is filled with
untreated water only.
Remedial action
Adjusting hardness range
Advise customer, use phosphatic detergent.
Adjust regeneration position and conduct
performance test (observe drainage of regeneration
dispenser) Check regeneration valve carefully
(mechanical – valve stem; electrical – actuation /
coil)
Check untreated water valve
(mechanical – valve stem; electrical – actuation /
coil)
Seite 50 von 60

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