Air Conditioning System: Overview Kia Rio II рестайлинг

Scheme 1

1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves.
2. It is standard practice to wear goggles or glasses to protect your eyes, and gloves to protect your hands. If the refrigerant splashes into your eyes, wash them with clean water immediately.
3. The R-134a container is highly pressurized. Never leave it in a hot place, and check that the storage temperature is below 52°C (126°F).
4. An electronic leak detector should be used to check the system for refrigerant leakage. Bear in mind that the R-134a, upon coming into contact with flame, produces phosgene, a highly toxic gas.
5. Use only recommended the lubricant for R-134a systems. If lubricants other than the recommended one used, system failure may occur.
6. PAG lubricant absorbs moisture from the atmosphere at a rapid rate, therefore the following precautions must be observed : When removing refrigerant components from a vehicle, cap immediately the components to prevent from the entry of moisture. When installing refrigerant components to a vehicle, do not remove the cap until just before connecting the components. Complete the connection of all refrigerant tubes and hoses without delay to prevent the A/C system from taking on moisture. Use the recommended lubricant from a sealed container only.
7. If an accidental discharge in the system occurs, ventilate the work area before resuming service.

Scheme 2

1. Never open or loosen a connection before discharging the system.
2. Seal the open fittings of components with a cap or plug immediately to prevent intrusion of moisture or dust.
3. Do not remove the sealing caps from a replacement component until it is ready to be installed.
4. Before connecting an open fitting, always install a new sealing ring. Coat the fitting and seal with refrigerant oil before making the connection.

OIL RETURN OPERATION

There is close relationship between the oil and the refrigerant.

During normal operation, part of the oil recirculates with the refrigerant in the system.

When checking the amount of oil in the system, or replacing any component of the system, the compressor must be run in advance for oil return operation. The procedure is as follows

1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to "ON" and set the blower motor control knob at its highest position.
3. Run the compressor for more than 20 minutes between 800 and 1,000 rpm in order to operate the system.
4. Stop the engine.

DESCRIPTION

The A/C pressure transducer provides a voltage signal to the ECM/PCM that is used for compressor clutch and cooling/condenser fan control.

Scheme 3

1. Measure the pressure of high pressure line by measuring voltage output between NO. 1 and NO. 2 terminals.
2. Inspect the voltage value whether it is sufficient to be regular value or not. VOLTAGE AND PESSURE SPECIFICATIONS Pressure (psi) 14.7 100 200 300 470 Voltage (V) 0.5 1.25 2.13 3.00 4.50
3. If the measured voltage value is not specification, replace the A/C pressure transducer.

Scheme 4

Scheme 5

Scheme 6

Scheme 7

1. Disconnect the negative (-) battery terminal.
2. Recover the refrigerant with a recovery/charging station. (Refer to «REFRIGERANT LEAK TEST»(ref-378984-S09959661602010113000000) )
3. Remove the discharge line (A) & suction line (B) for wide space. TORQUE : 8~12N.m (0.8~1.2kgf.m, 5.8~8.7lb.ft)
4. Disconnect A/C pressure transducer connector (3P) (A).
5. Remove the bolt, then disconnect the liquid & suction (A) pipe from the expansion valve.
6. Remove the A/C pressure transducer (B) while holding on to the fitting block (A). CAUTION: Take care that liquid & suction pipe are not bent. TORQUE : 10~12N.m (1.0~1.2kgf.m, 7.4~8.8lb.ft)
7. Installation is the reverse order of removal.

Scheme 8

The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator freezing by excessive cooling.

It is a negative type thermistor whose resistance is inversely proportional to temperature.

Scheme 9

1. Ignition "ON".
2. A/C switch "ON".
3. Using the multi-tester, Measure resistance between terminal "1" and "2" of evaporator temperature sensor. Specification EVAPORATOR CORE TEMPERATURE SENSOR-VOLTAGE AND RESISTANCE SPECIFICATIONS Evaporator core temperature [°C(°F)] Resistance [kohms] Voltage [V] -10 (14) 13.56 2.88 ± 0.5 -5 (23) 10.37 2.55 ± 0.5 0 (32) 8.000 2.22 ± 0.5 5 (41) 6.222 1.91 ± 0.5 10 (50) 4.877 1.64 ± 0.5 15 (59) 3.851 1.39 ± 0.5 20 (68) 3.063 1.17 ± 0.5 25 (77) 2.453 0.98 ± 0.5 30 (86) 1.978 0.83 ± 0.5 35 (95) 1.605 0.69 ± 0.5 40 (104) 1.310 0.58 ± 0.5 45 (113) 1.075 0.49 ± 0.5 50 (122) 0.888 0.41 ± 0.5
4. If the measured resistance is not specification, substitute with a known-good evaporator temperature sensor and check for proper operation.
5. If the problem is corrected, replace the evaporator temperature sensor.

Scheme 10

Scheme 11

Scheme 12

1. Disconnect the negative (-) battery terminal.
2. Remove the crash pad. (Refer to «CRASH PAD»(ref-378954-S04244826872010113000000) )
3. Disconnect the evaporator sensor connector (A).
4. Remove the blower unit from the heater unit after loosening a mounting bolt & 3 screrws.
5. Remove the evaporator sensor (A) from evaporator core by pulling out. CAUTION: Take care that evaporator core pins are not bent.
6. Installation is the reverse order of removal.