AR83.30-D-1209A Carry Out Quick Test On Air Conditioning System

Carry Out Quick Test On Air Conditioning System

Shown On Models 901, 902, 903, 904:

Prerequisites for testing
1 Place vehicle with open windows in the shade
2 Set heater control valve to "cold"
3 Set heating and ventilation system to fresh air mode
4 Fully open lateral nozzles, center nozzles and footwell flaps
5 Start vehicle engine and allow to idle

Inspecting
6 Switch air conditioning on

NOTE: When the air conditioning is switched on, the vehicle engine's idle speed must increase.

- If No idle speed increase, check function of refrigerant compressor

- RPM sensor in the event of complaint, replace refrigerant compressor RPM sensor

NOTE: Not in model 163

7 Set blower rotary switch to maximum blower settings
8 Check that refrigerant flows free of bubbles

NOTE: If the system is filled sufficiently, the refrigerant must flow through the inspection glass (2) free of bubbles. A newly-filled system may initially reveal bubbles. In this case, wait for approx. 10 min. and check inspection glass again.

- Does not reveal bubble-free flow, Check entire air conditioning circuit for leaks using leak detector (3).

9 Determine air outlet temperature

NOTE: Switch blower rotary switch to stage "1".

- Insert sensor of temperature measurement device (1) into the air outlet of the center nozzles.
- After running for a period of 5 min., the air outlet temperature must not be less than 2 degrees C and more than 12 degrees C. After 5 min., at the latest, the refrigerant compressor must also be connected and disconnected.
- If the refrigerant compressor is disconnected at below 2 degrees C, Check evaporator temperature switch.
- If the air outlet temperature is not achieved, Check the connection and disconnection of the refrigerant compressor or the refrigerant pressure upstream and downstream of the refrigerant compressor.

10 Switch air conditioning off and shut vehicle engine off