5-10 Chapter 5: Testing SHB_U14
Heater
Accessories
Multimeter
Electrical value:
Heating resistor resistance
Where? • Overall measurement of all heating resistors:
Disconnect the 4-pin plug from Sensor-CPU board X8.
2-pin plug connected to cover.
Test point: Between brown and white
• Measurement of the two heating resistors on the thermostat board
Disconnect the 4-pin plug from Sensor-CPU board X8.
Remove the 2-pin plug connected to the cover.
Test point: Between brown and white
• Measurement of the two heating resistors in the hood
Disconnect the 2-pin plug from the hood
Test point: Hood plug
Desired values: • Total resistance: approx. 9.5 Ω ± 0.5 Ω
•
Thermostat board heating resistors: approx. 12.5 Ω
•
Hood heating resistors: approx. 50 Ω
Figure 5-6
Thermostat
Figure 5-7
Circuit board
Thermostat
pin layout
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