Miele T 9800 Service Manual download pdf (Page 35)

2.3 Heater control

Safety function:

If the NTC temperature sensor drying air (1R30) is defective, the heater is not

switched on.

The heater is switched off as soon as the heater relay is activated for more than 5

seconds without the motor relay being activated.

Heater reactivation is delayed by 10 s, the auxiliary heater is switched off before,

during and after a reversing pause.

2.4 Temperature limiter with manual reset (1F1, 2F1, 3F1)

T 9800

Three closed 3/4 inch temperature limiters, with manual reset via pushbutton, are

on the heater bank.

2.5 NTC temperature sensor drying air (1R30)

If the temperature sensor drying air NTC detects temperatures lower than 5°F (-

15°C) or higher than 320°F (160 °C), the NTC must be considered defective.

2.6 NTC temperature sensor heating/drying (2R30)

An open circuit in the NTC temperature sensor heating/drying (2R30) can only be

detected at temperatures higher than 57 °F (14 °C). Since lower temperatures

can exist during operating, sensor readings will only be evaluated after the heater

has been running for at least 1 minute.

Note

If the heater is defective, Fault F 4 (dr ying/heating temperature sensor, 2R30) is

issued.

If the NTC temperature sensor heating/drying has a short circuit, corresponding to

482 °F, the heater is switched off immediately.

Descriptive Technical Documentation

DTD no. 12-9800 030-5

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Miele T 9800 Service Manual Page 35