Miele PG 8172, Operating Instructions Manual

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12.4 Hygiene logbook
In the hygiene logbook you can:

retrieve all operating conditions, actions, and failures for one day in chronological order.

retrieve all hygiene relevant data.
The list starts with the current date and the first event on this day. Then the following events on that day, and
then the events of days before. The most important operating data are summarized at the end of each day.
INFO When the memory capacity is reached, the oldest data is deleted as soon as new data is added.
Accessing the hygiene logbook

Press the button.
 The hygiene logbook display then appears:

The list starts with the current date and the first event on this day.

This is followed by the events from the days before.
 Press the back button to exit from the menu.
12.5 Descaling / basic cleaning
12.5.1 Descaling programme
If the machine is operated with hard water without water treatment, the boiler, the machine interior, all water
lines and other components may scale.
Limescale, grease residues and dirt that remain in the machine can contribute towards an unhygienic interior
and can lead to failure of heating elements. Regular removal of these deposits is absolutely essential.
Using the descaling programme you can descale the interior of the commercial dishwasher. The water lines
and the boiler can only be descaled by an authorised service technician.
For descaling, you need an acid-based descaler suitable for commercial dishwashers.
Danger

When handling chemicals, observe the safety notes and the dosage recommendations on
the packaging.

Wear protective clothing, protective gloves and protective goggles when handling chemicals.
Ideally, start the descaling programme when the machine is empty and switched off. If the machine is
already prepared for use, it will automatically empty first.
Only with an external detergent dispenser pump:
Warning
Development of chlorine gas
If you mix active chlorinated detergent and descaler, chlorine gas is produced. Stop the
detergent dosing (e.g. remove the suction tube or switch off the dispenser pump).
INFO An internal detergent dispenser pump in the machine will be disabled automatically in the descaling
programme.
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