Kia Niro: Body / Air Conditioner Refrigerant/Compressor Repair procedures

Kia Niro 2017 (DE HEV) Service Manual / Maintenance / Body / Air Conditioner Refrigerant/Compressor Repair procedures

Refrigerant Recovery

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

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not inhale refrigerant or vapor.

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

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

1.	Connect an R-134a refrigerant Recovery/Recycling/Charging system (A) to the high-pressure service port (C) and the low-pressure service port (B) as shown according to the equipment manufacturer's instructions.

2.	Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to install the same amount of new refrigerant oil back into the A/C system before charging.

System Evacuation

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

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not inhale refrigerant or vapor.

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

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

When an A/C system has been opened to the atmosphere during e.g. installation or repair, it must be evacuated using an R-134a refrigerant Recovery/Recycling/Charging system. (If the system has been open for several days, the receiver/drier should be replaced, and the system should be evacuated for several hours.)

2.	Connect an R-134a refrigerant Recovery/Recycling/Charging system (A) to the high-pressure service port (B) and the low-pressure service port (C) as shown according to the equipment manufacturer's instructions.

3.	If the low-pressure does not reach more than 93.3 kPa (700 mmHg, 27.6 in.Hg) in 10 minutes, there is a probable leakage in the system. Partially charge the system and check for leaks. (See Refrigerant Leak Test.)

4.	Remove the low pressure valve from the low-pressure service port.

System Charging

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

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not inhale refrigerant or vapor.

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

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

1.	Connect an R-134a refrigerant Recovery/Recycling/Charging system (A) to the high-pressure service port (B) as shown according to the equipment manufacturer's instructions.

Add the same amount of new refrigerant oil to the system that was removed during recovery. Use only specified refrigerant oil.

Do not overcharge the system as it may damage the compressor.

R-134a : 570 ± 25g (20.1 ± 0.88oz.)

R-1234yf : 470 ± 25g (16.6 ± 0.88oz.)

Refrigerant Leak Test

Always conduct a leak test with an electronic leak detector whenever leakage or refrigerant is suspected and when conducting service operations which are accompanied by disassembly or loosening or connection fittings.

In order to use the leak detector properly, read the manual supplied by the manufacturer.

If a gas leak is detected, proceed as follows:

1.	Check the torque on the connection fittings and, if too loose, tighten to the proper torque. Check for gas leakage with a leak detector (A).

2.	If leakage continues even after the fitting has been tightened, discharge the refrigerant from the system, disconnect the fittings, and check their seating faces for damage. Always replace, even if the damage is slight.

3.	Check the compressor oil and add oil if required.

4.	Charge the system and recheck for gas leaks. If no leaks are found, evacuate and charge the system again.

Inspection

Compressor

RPM check

1.	Push the A/C control switch ON.

Check the engine RPM.

When the compressor operates, RPM increases.

When the compressor is operating, RPM should be as follows.

Item		Specification
Ignition Timing (°)		BTDC 5° ± 10°
Idle Speed (rpm)	A/C OFF	Neutral, N, P-range	630 ± 100
		D-range	630 ± 100
	A/C ON	Neutral, N, P-range	700 ± 100
		D-range	680 ± 100

Sound check

1.	Push the A/C control switch ON.

2.	Check the compressor from the engine room.

When the compressor is operating, a clacking sound is heard.

If the compressor isn't operating, there is no sound.

Body

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