Bosch WTA34 Series Repair Instructions - Page 4

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TUMBLE DRYER

Resistance values NTC R3 / NTC R4

NTC R2

is situated above the heater and measures the temperature of the process air blown into the

washing.

1.4

Motor

The motor drives the drum and the fan.

Specifications:

Rated input when appliance empty:

Current input when appliance empty:

Motor capacitor, capacity:

Nominal frequency:

Nominal voltage:

1.5

Heater

The heater consists of two heating coils E2, E3, the bimetallic thermal cut-out B9 and the

NTC R2.

Heat setting 2:

Heat setting 3:

1.6

Bimetallic thermal cut-out (heater)

The thermal cut-out should respond when localised overheating occurs, e.g. if the air flow or

electrical temperature control fails.

If a fault occurs, the thermal cut-out must be manually actuated by pressing the red reset

button.

Response temperature: 160–175 degrees Celsius

1.7

Door switch and safety functions

All relay activations are controlled via the door switch. When the door is open, relays cannot

be activated.

When the door is closed and the mains switch is on, the capacitor is charged via a processor

output. Its voltage is monitored by an analogue input.

r120085e -15/4

04.99

Temperature

1200 W

1800 W

Resistance

kΩ

9–11

2.3–2.7

Resistance

kΩ

18–22

4.5–5.5

140 W

0.5 A

11 µF

50 Hz

230 V