SLK 230 (170.449) L4-2.3L SC (111.983) (2001)
Condenser Fan: Description and Operation
Electric Suction Type Fan Control Module
Function
The control module for the electric suction-type fan (engine/A/C) (N76) receives input information on the coolant temperature and refrigerant pressure.
The control module for the electric suction-type fan (engine/A/C) (N76) compares these values with stored values and increases the speed of the electric
suction-type fan (engine/A/C) (M4/3) from 20% for basic ventilation (with A/C compressor ON) up to 100% under the following conditions:
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Refrigerant pressure > 13 bar
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Coolant temperature > 103 °C
The speed is set back to 20% basic ventilation under the following conditions:
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Refrigerant pressure < 12 bar
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Coolant temperature < 100 °c