Impreza RS Coupe AWD F4-2.5L SOHC (1999)
1. ABNORMAL LOW-PRESSURE OPERATION
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All contact points are open (OFF) since the tension of the diaphragm springs is greater than refrigerant pressure.
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Approx. 186 kPa (1.9 kg/sq.cm, 27 psi) < P < approx. 1,471 kPa (15 kg/sq.cm, 213 psi)
When refrigerant pressure is greater than 186 kPa (1.9 kg/sq.cm, 27 psi), diaphragm spring is inverted so that low switch is opened (OFF).
2. ABNORMAL HIGH-PRESSURE OPERATION
When refrigerant pressure is greater than 2,746 kPa (28 kg/sq.cm, 398 psi), diaphragm spring is inverted so that high switch is opened (OFF) and
low switch is closed (ON).
