Kia Carens. Instruction — part 313

Blower switch

1. Check continuity between terminal of blower switch.

2. If not as specificed, replace blower switch.

Insufficient cooling, No cooling, Intermittent cooling

1. Checking refrigerant charge.

(1) Run engine at a fast idle.

(2) Operate air conditioner at maximum cooling for a few minutes, go to Step 2.

2. Checking refrigerant pressure.

(1) Connect A/C manifold gauge set.

(2) Operate engine at 2,000 rpm and set air conditioner to maximum cooling.

(3) Measure low-and high-pressure sides.

Normal pressure
Low-pressure side : 20~41 psi (137~284 kPa, 1.40~2.90 kg/cm²)
High-pressure side : 185~263 psi (1,275~1,814 kPa, 12.0~18.5 kg/cm²)

(4) If pressures are not as specified, refer to following chart and check system.

Troubleshooting

Measured pressure

Possible causes

Low-side: 8.5~14.2 psi
(98.9~98.1kPa, 0.59~1kg/cm²)
High-side: 119~136 psi
(824~942kPa, 8.40~9.60kg/cm²)

Insufficient refrigerant

Low-side: Above 34.1 psi
(235kPa, 2.40kg/cm²)
High-side: Above 327 psi
(2,256kPa, 23.0kg/cm²)

Excessive refrigerant or insufficient
condenser cooling

Low-side: Above 34.1 psi
(235kPa, 2.40kg/cm²)
High-side: Above 377 psi
(2,600kPa, 26.5kg/cm²)

Air in system

Low-side: Below 20 psi
(137kPa, 1.40kg/cm²)
High-side: Below 88 psi
(608kPa, 6.20kg/cm²)

Moisture in system

Low-side: Below 20 psi
(137kPa, 1.40kg/cm²)
High-side: Below 88 psi
(608kPa, 6.20kg/cm²)

No refrigerant circulation

Low-side: 35.6 psi
(245kPa, 2.50kg/cm²)
High-side: 307~326 psi
(2,119~2,247kPa, 21.6~22.9kg/cm²)

Expansion valve stuck open

Low-side: 57~85 psi
(392~608kPa, 4.0~6.20kg/cm²)
High-side: 107~152 psi
(736~1,050kPa, 7.50~10.7kg/cm²)

Faulty compressor

Insufficient refrigerant

Measured pressure
Low-pressure side : 8.5~14.2 psi (58.9~98.1 kPa, 0.6~1.0 kg/cm²)
High-pressure side : 119~136 psi (824~942 kPa, 8.4~9.6 kg/cm²)

1. Step 1

(1) Check for oil stains on pipes, hoses and other parts.

(2) If oil staining is found at connection of pipes or hoses, replace O-ring ; then, evacuate, charge, and test

system.
Refer to operating instructions of your refrigerant recovery/recycling/charging station for proper
procedures.

(3) If oil staining is not found, go to Step 2.

2. Step 2

(1) Check for leakage from following connection with a gas leak tester.

A. Inlet and outlet of condenser
B. Inlet and outlet of receiver/drier

C. Inlet and outlet of compressor
D. Inlet and outlet of cooling unit

(2) If leakage is evident, go to Step 3.

(3) If leakage cannot be found, evacuate, charge and test system. Refer to operating instructions of your

refrigerant recovery/recycling/charging station for proper procedures.

3. Step 3

(1) Check tightening torque of connection where leak was detected.

(2) If connection is loose, tighten connection to specified torque ; then evacuate, charge, and test system.

Refer to operating instructions of your refrigerant recovery/recycling/charging station for proper
procedures.

(3) If connection is properly tightened, replace O-ring; ten evacuate, charge, and test system. Refer to

operating instructions of your refrigerant recovery/recycling/charging station for proper procedures.

Excessive refrigerant or insufficient condenser cooling

Measured pressure
Low-pressure side : 34.1 psi (235 kPa, 2.40 kg/cm²)
High-pressure side : 327 psi (2,256 kPa, 23.0 kg/cm²)

If condenser fan does not operate when air conditioner is operating, refer to “Condenser Fan Does Not
Operate” before proceeding.

1. Step 1

(1) Check condenser for bent fins or damage.

(2) If condenser is OK, discharge excess refrigerant.

Refer to operating instructions of your refrigerant recover/recycling/charging station for proper
procedures.

Always wear gloves and eye protection when dischargine refrigerant.

(3) Verify that refrigerant pressure is normal.

Air in system

Measured pressure
Low-pressure : Above 34.1 psi (235 kPa. 2.40 kg/cm²)
High-pressure : Above 377 psi (2,600 kPa, 26.5 kg/cm²)

- Condition - Insufficient cooling

1. Discharge refrigeration system. Refer to operating instructions of your refrigerant recovery/recycling

/charging station for proper procedures.

2. Evacuate system to remove all air from it. Refer to operating instructions of your refrigerant

recovery/recycling/charging station for proper procedures.

3. Charge system with refrigerant. Refer to operating instructions of your refrigerant recovery/recycling

/charging station for proper procedures.

4. After charging, measure refrigerant pressure. Refer to “Checking Refrigerant Pressure".

5. If low-and high-pressure sides air still too high, replace receiver/drier.

Moisture in system

Measured pressure
Low-pressure : Below 20 psi (137 kPa, 1.40 kg/cm²)
High-pressure : Below 88 psi (608 kPa, 6.20 kg/cm²)

- Condition - Intermittent cooling