Aveo L4-1.6L (2008)
Refrigerant: Service and Repair
Refrigerant Recovery and Recharging
The efficient operation and life of the air conditioning system is dependent upon the chemical stability of the refrigeration system. When foreign
materials, such as dirt, air, or moisture, contaminate the refrigeration system, they will change the stability of the refrigerant and the polyalkaline glycol
(PAG) compressor oil. They will also affect the pressure-temperature relationship, reduce efficient operation, and can possibly cause interior corrosion
and abnormal wear of moving parts.
Observe the following practices to ensure chemical stability in the system:
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Wipe away dirt or oil at and near any connection before opening that connection. This will reduce the chance of dirt entering the system.
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Cap, plug, or tape both sides of a connection as soon as possible after opening the connection. This will prevent the entry of dirt, foreign material,
and moisture.
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Keep all tools clean and dry, including the manifold gage set and all replacement parts.
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Use a clean and dry transfer device and container to add PAG refrigerant oil. This will ensure that the oil remains as moisture-free as possible.
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Have everything you need ready to allow you to perform all operations quickly when opening an A/C system. Do not leave the A/C system open
any longer than necessary.
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Evacuate and recharge any A/C system that has been opened.
All service parts are dehydrated and sealed before shipping. They should remain sealed until just before making connections. All the parts should be at
room temperature before uncapping. This prevents condensation of moisture from the air from entering the system. Reseal all parts as soon as possible if
the caps have been removed but the connections cannot be made promptly.
Caution: Use only refillable refrigerant tanks that are authorized for the charging station being used. The use of other tanks may cause personal injury or
void the warranty. Refer to the Manufacturer's instructions for the charging station.
Caution: Refer to Protective Goggles and Glove Caution (See: Service Precautions/Technician Safety Information/Protective Goggles and Glove
Warning).
A charging station discharges, evacuates, and recharges an air conditioning system with one hook-up. Filtering during the recovery cycle together with
filtering during the evacuation cycle ensures a supply of clean, dry refrigerant for A/C system charging.
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Never use the R-134a charging station on a system charged with R-12. The refrigerants and the oils are not compatible and must never be mixed in
even the smallest amount. Mixing refrigerant residue will damage the equipment.
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Never use adapters which convert from one size fitting to another. This will allow contamination which may cause system failure.
Charging Station Setup and Maintenance
Refer to the manufacturer's instructions for all initial setup procedures and all maintenance procedures. There are many charging stations available. All
perform the various tasks required to discharge the system and recover refrigerant, evacuate the system, add a measured amount of oil, and recharge an
air conditioning system with a measured amount of refrigerant.
Control Panel Functions
A charging station will have controls and indicators to allow the operator to control and monitor the operation in progress. Refer to the manufacturer's
instructions for details. These can be expected to include:
1. Main power switch-The main power switch supplies electrical power to the control panel.
2. Display-The display shows the time programmed for vacuum and the weight of the refrigerant programmed for recharging. Refer to the
manufacturer's instructions for detailed programming information.
3. Low-side manifold gage-This gage shows the system's low-side pressure.
4. High-side manifold gage-This gage shows the system's high-side pressure.
5. Controls-This will contain the controls that control various operating functions.
6. Low-side valve-This valve connects the low side of the A/C system to the unit.
7. Moisture indicator-This indicator shows if the refrigerant is wet or dry.
8. High-side valve-This valve connects the high side of the A/C system to the unit.
Refrigerant Recovery
Important: Use only a refrigerant tank that is designed for the charging station in use. The unit's overfill limitation mechanism is calibrated
specifically for use with this tank. The tank's valves are also specifically for this unit.
1. Attach the high-side hose with the quick disconnect coupler to the high-side fitting of the vehicle's A/C system.
2. Open the coupler valve after attachment.