GF83.40-P-2172-01R Engine and AC Electric Suction Fan With Integrated Control, Function

GF83.40-P-2172-01R Engine And AC Electric Suction Fan With Integrated Control, Function
- with CODE (581) Automatic air conditioning


Function
The speed of the engine and AC electric suction fan with integrated control (M4/7) is continuously increased depending upon the refrigerant pressure and/or the coolant temperature.

The engine and AC electric suction fan with integrated control (M4/7) receives the coolant temperature from the coolant temperature sensor (B11/4) and the refrigerant pressure from the refrigerant pressure and temperature sensor (B12/2).
The engine and AC electric suction fan with integrated control (M4/7) compares this input information with stored values and, where applicable, the speed of the engine and AC electric suction fan is increased to 100 %.

The engine and AC electric suction fan with integrated control (M4/7) operates as a basic ventilation at 30 % output when the A/C system is switched on.

The basic ventilation can be switched off under the following conditions:

^ At an outside temperature of ≤ 15 °C.
The pressure-dependent fan speed remains the same.
^ At a driving speed of > 70 km/h.
The pressure-dependent fan speed remains the same.

An overrun time of 60 s can be set in order to ensure that the engine and AC electric suction fan with integrated control (M4/7) will continue to operate even where the refrigerant compressor is temporarily switched off by the icing protection.
The engine and AC electric suction fan with integrated control (M4/7) is equipped with an emergency circuit, which can be manually activated by the AAC pushbutton control module (N22). The coolant-dependent control of the engine and AC electric suction fan with integrated control ensues via the ME-SFI control module (N3/10).