DISCHARGING, EVACUATING, CHARGING AND CHECKING — Confirmation of Amount of Charged Refrigerant
HA-23flowchartConfirmation of Amount of Charged Refrigerant
The amount of refrigerant charged into the system can be observed through the sight glass by watching the flow of the refrigerant and by reading the high pressure and low pressure manifold gauges under the following conditions:
CONDITIONS
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WORK PROCEDURE
Confirmation of amount of charged refrigerant
1
Engine speed: Approx. 1,500 rpm
2
After warming up engine, adjust intake air temperature to 30 to 35°C (86 to 95°F). Wait until high pressure is stabilized at approx. 1,471 kPa (14.7 bar, 15 kg/cm², 213 psi).*1
3
Check the sight glass of the refrigerant system.*2 Touch the high and low pressure tubes of the system to get an idea of the temperature.
4
Check to see whether the refrigerant is free of white clouding and bubbles.
O.K.
Charged amount of refrigerant is O.K.
N.G.
5
If white clouding or bubbles are found:
6
Recover the refrigerant from the A/C system. Recharge the system to specification using an accurate refrigerant measuring device.
Charged amount of refrigerant is O.K.