440
AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the measurements.
«m»: High pressure. «s»: Over-heating (SC).
«n»: High temperature. «t»: Ambient air temperature.
«p»: Under-cooling (SR). «u»: Blown air temperature.
«q»: Low pressure. «v»: Humidity.
«r»: Low temperature. «w»: Temperature T3.
Under-cooling.
The under-cooling represents the difference between the condensation temperature and the aircon
fluid temperature at the aircon condenser outlet.
The under-cooling gives the quantity of aircon fluid
(in the liquid state)
in the air conditioning circuit.
Values for under-cooling (SR).
Values «p» Origins Solutions
SR < 2°C
Lack of aircon fluid in the aircon condenser
(should be more than 150 grammes)
Add some
2°C < SR <4°C
Lack of aircon fluid in the aircon condenser aircon fluid
(should be around 100 to 150 grammes)
4°C < SR < 10°C/12°C Correct quantity
SR > 10°C/12°C Remove some
Excess aircon fluid in the aircon condenser aircon fluid
SR > 15°C
Blown air temperature «u».
The blown air temperature should be between 2°C and 10°C.
E5AP2FBC
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