Air Conditioning System - Except Hev: Overview Kia Optima III

Oil Return Operation

There is close affinity between the oil and the refrigerant.

During normal operation, part of the oil recirculation 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.

Scheme 1

Description

A/C pressure transducer converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls cooling fan by operating it high speed or low speed. Engine ECU stop the operation of compressor when the temperature of refrigerant line is so high or so low irregularly to optimize air conditioning system.

Scheme 2

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 = 0.00878835 * Pressure + 0.5 (PSIA)
3. If the measured voltage value is not specification, replace the A/C pressure transducer.

Scheme 4

Scheme 5

1. Disconnect the negative (-) battery terminal.
2. Recover the refrigerant with a recovery/charging station.
3. Disconnect the A/C pressure transducer connector (3P) (A). Tightening torque: 10~12 N.m (1.0~1.2kgf.m, 7.4~8.8 lb-ft) CAUTION: Take care that liquid & suction pipe are not bent.
4. Installation is the reverse order of removal.

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

1. The photo sensor is located at the right of defrost nozzle.
2. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation received which is transferred to the automatic temperature control module so that the solar radiation compensation will be performed.

1. The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature. It is a negative type thermistor; resistance will increase with lower temperature, and decrease with higher temperatures.
2. The sensor output will be used for discharge temperature control, temperature regulation door control, blower motor level control, mix mode control and in-car humidity control.

Note. If the ambient temperature is below 0°C (32.0°F), the A/C compressor will be stopped. The compressor will be operated by manual operating.

Scheme 6

1. Ignition "OFF"
2. Disconnect ambient temperature sensor.
3. Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing of the ambient temperature. Specification RESISTANCE SPECIFICATIONS Ambient temperature (°C (°F)) Resistance between terminals 1 and 2 (kohms) -30 (-22) 480.41 -20 (-4) 271.21 -10 (14) 158.18 0 (32) 95.10 10 (50) 58.80 20 (68) 37.32 30 (86) 23.76 40 (104) 16.13 50 (122) 10.95
4. If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.
5. If the problem is corrected, replace the ambient temperature sensor.

Scheme 7

Scheme 8

1. Disconnect the negative (-) battery terminal.
2. Loosen the mounting blots and then remove the under cover (A).
3. Disconnect the connector and then remove the ambient temperature sensor (A).
4. Installation is the reverse order of removal.

Scheme 9

1. The function of cluster ion generator is cleaning air by sterilizing and dissolving of air conditioner.
2. The function of cluster ion generator is controlling mold caused by stench of air conditioner and external inflow of air.