Descale The Warewasher; Maintenance By The Customer Service Department - Miele PTD 901 Originalbetriebsanleitung

8.8

Descale the warewasher

If the warewasher is operated with hard water and without water treatment, then the boiler, the interior of the machine, all the water
lines and components may develop scale. Grease residues and dirt that remain in the machine can contribute towards hygiene risks,
while scaling can lead to failure of heating elements. Regular removal of this scaling is therefore necessary / essential.
The descaling programme can be used to descale the interior of the machine. (} 70)
The water lines and the boiler can be descaled only by an authorised service technician.
8.9

Maintenance by the customer service department

We recommend that you have an authorised service technician carry out maintenance of the warewasher at least once a year so that
vulnerable components subject to ageing and wear can be checked and replaced accordingly. Original spare parts must be used for re-
pairs or to replace consumable parts.
Consumable parts are, e.g.:
– Dosing tubes
– Inlet water hose
Service interval
The warewasher control unit specifies the number of operating hours or wash cycles at which the pictogram for
service is shown.
Note: This function is deactivated ex-factory. On request, the service technician can activate this function.
Operating instructions PTD 901
Cleaning and maintenance
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12020302; 2021-09
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