Automatic HVAC: Diagnosis Kia Optima I рестайлинг

TROUBLESHOOTING

Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor.

The following diagnostic charts have been developed as a quick reference for determining the cause of the malfunction. If these charts DO NOT satisfactorily describe the problem, refer to the appropriate section for a more detailed explanation. After correcting the malfunction, check the complete system to ensure that performance is satisfactory.

Scheme 10

Scheme 11

Scheme 12

Scheme 13

REFRIGERANT LEAK TEST

Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a(R-134a) from the air conditioning system.

If accidental system discharge occurs, ventilate work area before resuming service.

R-134a service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1. Connect a R-134a refrigerant Recovery/Recycling/Charging System to the high-pressure service port and the low-pressure service port as shown in the previous column, following the equipment manufacturer's instructions.
2. Open the high-pressure valve to charge the system to the specified capacity, then close the supply valve, and remove the charging system couplers. Refrigerant capacity : 680 +/- 25g (23.99 +/- 0.88)
3. Check the system for leaks using a R-134a refrigerant leak detector with an accuracy of 14g (0.5 oz) per year or better.
4. If you find leaks that require the system to be opened (to repair or replace hoses, fittings, etc.) recover the system according to «REFRIGERANT RECOVERY»(ref-173551-S09662479842005031700000) .
5. After checking and repairing leaks, the system must be evacuated.

Scheme 14

1. Install the manifold gauge set.
2. Run the engine at 2,000 rpm and set the controls for maximum cooling and high blower speed.
3. Keep all windows and doors open.
4. Place a dry-bulb thermometer in the cool air outlet.
5. Place a wet-dry thermometer close to the inlet of the cooling unit.
6. Check that the reading on the high pressure gauge is 1,373-1,575 kPa (14-16 kg/cm 2 , 199-228 psi). If the reading is too high, pour water on the condenser. If the reading to too low, cover the front of the condenser.
7. Check that the reading on the dry-bulb thermometer at the air inlet at 25-35°C (77-95°F).
8. Calculate the relative humidity from the psychrometric graph by comparing the wet-and-dry-bulb reading at the air inlet.
9. Measure the dry-bulb temperature at the cool air outlet, and calculate the difference between the inlet dry-bulb and outlet dry-bulb temperatures.
10. Check that the intersection of the relative humidity and temperature difference falls within the block below. If the intersection is within the block, cooling performance is satisfactory.

Scheme 15

INSPECTION

1. The A.Q.S. sensor, located at the front of the condenser fan, detects hazardous elements in ambient air, and provides output signals to the control module.
2. It will detect sulfurous acid gas, carbon dioxide, carbon monoxide, hydrocarbon and allergen.

Scheme 16

Scheme 17

Scheme 18

1. Humidity sensor is located at the rear package tray and detected in-car humidity for in-car humidity control.
2. If ambient air temperature or in-car humidity is outside certain range, it will turn on A/C to control in-car humidity preventing in-car fogging. Air conditioner operation depending on ambient temperature and humidity.

Scheme 19

Scheme 20

1. Apply 12V to mode actuator terminal 2 and ground terminal 1.
2. Verify that the mode actuator operates as below when grounding terminals 7,6,5,4 and 3 in sequence. VENT --> BI/LEVEL --> HEAT --> D/F --> DEF

Scheme 21

DTC CHART

If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table below.

Scheme 22

Scheme 23

Scheme 24

Scheme 25

1. DEFOG LOGIC Enable to select A/C ON/OFF & Intake button at MIX<-->DEF changing
2. DISSOLUTION & REINSTATEMENT OF LOGIC Move to def mode Push intake button 5 items or more within 3 seconds on keeping A/C button selected Intake indicator is flashed 3 times Complete dissolution & reinstatement of logic Be operated on A/C off, fresh mode When the battery happens to be disconnected or discharged, the defog logic is reinstated.