Mercedes M-Class W163

since 1997 release

Repair and operation of the car

Bystry check of serviceability of functioning of the air conditioning system

Bystry check of serviceability of functioning of the air conditioning system (on the example of the series 901 minibus, - check is made for M-class models in a similar manner)

1 — temperature Measuring instrument 2 — the Observation port of a receiver dehumidifier	3 — the Detector of leak of coolant

PERFORMANCE ORDER

Illustrative material on bystry check of serviceability of functioning of the air conditioning system is presented on an illustration to which all references which are found in the text belong. Drive the car into a shadow, open all windows. Transfer the handle of the choice of temperature condition to position of COLD (Cold). Include the mode of supply of fresh air. Completely open sections through passage snuffled all air ducts. Start the engine on single turns. Include To/in, - turns of the engine have to increase. Include the maximum high-speed mode of functioning of the fan. Through an observation port of a receiver dehumidifier (2) make sure of lack of signs of a puzyreniye of coolant. At primary start of svezhezapravlenny system formation of air bubbles should not cause concerns, - wait about 10 minutes, - bubbles have to disappear. Attentively study an external condition of all components refrigerator To/in, by means of the special detector check them for existence of signs of development of leaks. Transfer the fan to the high-speed 1 mode and by means of the special measuring instrument (1) measure temperature of the air which is coming out via the central deflectors of the dashboard. 5 minutes of functioning of system later temperature of the air given to salon has to be in limits of the range of +2 °C of ÷ of +12 °C, and the K/V compressor has to pass into the cyclic mode (vkl-vykl), otherwise it is necessary to check a condition of the sensor switch of temperature of the evaporator. Switch off the conditioner and kill the engine, - more detailed checks of the K/V system have to be carried out in the conditions of a workshop of car service.