Removal, installation and checking the refrigerant pressure sensor (Hyundai Accent MC)

Removal

1. Disconnect the wire from the negative terminal of the battery.

2. Remove the refrigerant from the air conditioner.

3. Disconnect the pressure (1) and feed (2) pipes. Tightening torque of the nuts: 8-12 Nm.



4. Disconnect the sensor connector.



5. Loosen the screw and disconnect the tubes (3 and 4) from the expansion valve.



6. Holding the fitting (5), unscrew the refrigerant pressure sensor (I). Tightening torque: 10-12 Nm.

Installation

7. Installation is carried out in the reverse order of removal.

Examination

8. Using a pressure gauge, measure the pressure "P" in the high-pressure circuit.

9. Calculate the output voltage "VB" of the sensor and compare it with the voltage measured between contacts 1 and 2. If the measured value differs from the calculated one, replace the sensor.

VB = V_nutrition * (0.00141748 * P + 0.037081095)

Where: P is the pressure in kPa

Pressure, PSI	Pressure, kPa	Voltage, V
14,7	101,35	0,5
100	689,5	1,25
200	1379	2,13
300	2068,5	3,00
470	3240,5	4,50

470*

Note: 1 PSI (pounds square inch) = 6894.8 Pa = 6.8948 kPa ≈ 0.068948 bar.