gf8340p1002a

Air-recirculation mode, basic function

Typ gf · téma 83.40 · verze 0106 · 2020-09-08

Platí pro: Model all (CAR)

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 3 Nástavba › 83 Klimatizace › 83.40 Automatická klimatizace — Řada 900 (modely 9**) · Řada 902 (modely 9**) · Řada 904 (modely 918, 919, 924, 925, 938, 943, 957) · Řada 906 (modely 917, 918, 924, 953)

Platí také pro motory/převodovky: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF83.40-P-1002A

Air-recirculation mode, basic function

07.09.2020

Model

all (CAR)

Overview

This document contains information on:

General

Function requirements

Air recirculation mode via the air recirculation mode button

Automatic air recirculation mode

Pollutant-controlled air recirculation mode

Continuous air-recirculation mode

General

In air-recirculation mode, the fresh air supply is switched off. To do so, the fresh/recirculated air flap closes and the air circulates in the vehicle interior. Air-recirculation mode is controlled via the climate control system.

Air-recirculation mode can be activated in the following ways:

Manually by the user (e.g. for unpleasant odors)

Automatically (e. g. for high pollutant concentration)

To prevent the windows from fogging, the system automatically switches back to fresh air mode after a period of time.

Function requirements

Circuit 15 ON

Climate control switched on

Air recirculation mode via the air recirculation mode button

Air-recirculation mode can be switched on and off manually on the air conditioning control panel. The LED in the air recirculation mode button lights up during air recirculation mode.

If the air recirculation button is pressed for longer than approx. 2 s, the side windows and the sliding sunroof or panoramic sliding sunroof are additionally closed. If the air recirculation button is pressed again for longer than approx. 2 s, these move back to the previous position (depending on market).

Depending on the outside temperature and the operating mode, the time until the system switches back to fresh air mode varies:

After 5 min at outside temperatures below 5 °C

After 5 min, if the refrigerant compressor is switched off.

After 30 min at outside temperatures above 5 °C and refrigerant compressor switched on

Automatic air recirculation mode

The climate control system can automatically switch on the air-recirculation mode under certain conditions (the LED in the air-recirculation mode button does not light up in this case):

If the outside temperature exceeds a certain threshold value.

If the vehicle drives into a tunnel (only on vehicles with navigation system).

In this case, the side windows and the sliding sunroof or panoramic sliding sunroof are additionally closed. The corresponding signals are received by the climate control system from the multimedia system control system.

Automatic air recirculation mode is active for max. 30 min.

Pollutant-controlled air recirculation mode

Additional function requirements:

Refrigerant compressor switched on

Defrosting function not active

With the aid of the air quality sensor, the climate control system monitors the concentration of poisonous carbon monoxide and nitrogen oxides in the incoming air. Depending on the equipment, the climate control system monitors the fine particle content of the incoming air with help from the fine particle sensor. As of a certain pollutant concentration it automatically switches to air-recirculation mode. The LED in the air-recirculation mode button does not light up in this case.

If, after starting the engine, the conditions for pollutant-controlled air-recirculation mode exist, the climate control system switches to air-recirculation mode in stages:

Fresh air mode for approx. 30 s

Air-recirculation mode with 80 % for approx. 10 s

Air-recirculation mode with 100 % (as required)

The pollutant-controlled air-recirculation mode is active for a maximum of 30 minutes.

Depending on the model, the recirculated air status and the pollutant values can be shown on the media display.

Continuous air-recirculation mode

Depending on the model and equipment installed, it is possible to select between continuous air-recirculation mode and normal operation in the multimedia system menu. When the continuous air-recirculation mode function is activated, a warning is issued about an increased risk of fogging.

Function schematics

Function schematic for regulating air-recirculation mode

Model 118, 177, 247

PE83.40-P-2501-97A

Model 167

PE83.40-P-2501-97B

Model 223

PE83.40-P-2501-97C

Model 293

PE83.40-P-2501-97D

Model 213, 238, 257, 290 as of model year 2021

PE83.40-P-2501-97E

Components

Air quality sensor, basic function

Model all (CAR)
with code 581 (Automatic air conditioning)
Model all (CAR)
with code 830 (China version)

GF83.40-P-2022A

Fine particle sensor, basic function

Model all (CAR)
with code 830 (China version)
with code P53 (Air cleaning package)

GF83.40-P-2023A

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