Withdrawal
1. Disconnect a wire from the negative plug of joint stock bank.
2. Remove the refrigerant from the air conditioner.
3. Disconnect the pressure (1) and nourishing (2) tubes. Nut tightening torque: 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 (AND). Tightening torque: 10-12 Nm.
Installation
7. Installation is carried out in the reverse order of removal.
Examination
8. Use a manometer to measure the pressure «R» in the high pressure circuit.
9. Calculate the output voltage «VB» sensor and compare it with the voltage measured between pins 1 and 2. If the measured value differs from the calculated value, replace the sensor.
VB = Vsupply* (0.00141748 * P + 0.037081095)
Where: P - pressure in kPa
1. «Weight»; 2. Output voltage; 3. Nutrition (5 V)
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 (lb * sq. inch) = 6894.8 Pa = 6.8948 kPa ≈ 0.068948 bar.