Exchanging Control Battery At F 157 1; Depressurization; Descaling 1; Filter Replacement 1 - WMF Presto Service Manual

5.6 Exchanging control battery at F 157
At error message 157 the control battery must be
replaced.
The notices on the display are to be followed:
All data is stored in the service memory.
Disconnect machine from mains

Exchange battery

As soon as the machine is reconnected to the mains all
data is automatically loaded into the service memory.
5.7

Depressurization

Temperature and pressure are reduced under control, also
in cases of overpressure, e.g. following a malfunction of
the heating switch and overheating of the boilers.
Before opening the screw connections in the boiler water
system this routine must be run for safety reasons.
5.8 Descaling
The same function as in the customer care menu.
5.9 Filter replacement
The same function as in the customer care menu.
5.10 Filter rinse
The same function as in the customer care menu.
WMF presto Service manual edition 08/2007
WMF presto Service Manual
1