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Sub-cool cycle |
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Amount of refrigerant |
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High-pressure |
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Amount of charge (eg. COROLLA ZZE 12# series: 530g ) |
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Point where bubbles disappear |
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Proper range ( ± 30g) |
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Overcharged |
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In a conventional A/C system, the "point at which the bubbles disappear" in the refrigerant gas when viewing the sight glass, is a general reference to indicate the correct refrigerant charge amount.
However, in the sub-cool cycle type A/C system, the point at which the refrigerant gas bubbles disappear occurs much earlier, and well before the correct refrigerant charge amount has entered the system.
Therefore, to ensure the correct refrigerant charge amount has entered the A/C system, refer to the specification in the relevant Repair Manual.
Overcharging the refrigerant can cause a decrease in fuel consumption and / or insufficient cooling performance.
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