Miele PW 5065 Service Manual download pdf (Page 23)

2 Function

2.1 Heating

Overheating protection:

To protect the machine against overheating in case of a technical fault, e.g. if the

heating relay contacts fuse together, the heater element has an overheating

protection device.

If the overheating device trips, the heater element is destroyed and must be

replaced.

2.2 Foam sensing

2.2.1 Excess foam when heating during the main wash

Foam is produced when the suds are heated. When the foam enters the

ventilation system, the pressure in the suds container increases.

If, during heating, the analog pressure sensor registers an increase in pressure of

60 mm wc (mm water column) above washing level, the following occurs:

– The heating is switched off for 2 min. After this time, it is only switched on

again when the pressure increase has dropped to 15 mm wc above washing

level. The fact that the desired temperature may not have been reached is not

indicated as a fault.

– If excess foam is registered 3 times, the Thermostop step is skipped.

– At the end of the programme, the display shows Check dispensing.

– The fault indication F16 Excess foam is saved, see Fault code F16, excess

foam, 080 3.10.

2.2.2 During rinse water intake excess foam is in the drum vent or odour trap

If excess foam exists during rinsing, then during water intake the pressure in the

suds container rises more rapidly than it would due merely to the incoming water.

If, during rinse water intake, the analog pressure sensor registers an increase in

pressure of 40 mm wc within 4 s, the following occurs:

– The water intake is switched of f for at least 15 s.

– After this time, it is only switched on again when the pressure increase has

dropped to 15 mm wc.

– At the end of the programme, the display shows Check dispensing.

– The fault indication F16 Excess foam is saved, see Fault code F16, excess

foam, 080 3.10.

Descriptive Technical Documentation

DTD no. 511-6055 030-3

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Miele PW 5065 Service Manual Page 23