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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Reminder (for information)
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 Origins Solutions
SR < 2°C Lack of aircon fluid in the aircon condenser
Add some aircon fluid
2°C < SR <4°C Lack of aircon fluid in the aircon condenser
4°C < SR < 10°C/12°C Correct quantity
SR > 10°C/12°C
Excess aircon fluid in the aircon condenser Remove some aircon fluid
SR > 15°C
Over-heating.
The over-heating represents the difference between the aircon fluid temperature at the evaporator outlet and the evaporation temperature.
The over-heating gives the quantity of aircon fluid (in the liquid state) in the air conditioning circuit
Values for over-heating (SC).
Values Origins Solutions
2° < SC < 15°C Correct quantity
SC > 15°C Lack of aircon fluid in the cooling circuit Add some aircon fluid
SC < 2°C Excess aircon fluid in the cooling circuit Remove some aircon fluid
Blown air temperature.
The blown air temperature should be between 2°C and 10°C.
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