Chevrolet Cobalt Service & Repair Manual: Refrigerant Recovery
| The refrigerant system must be
discharged using an air conditioning refrigerant recovery and recycling
system. After completing any required repairs the refrigerant system can
be evacuated and charged using an air conditioning service charging station.
Service fitting caps are color coded for easy reference. Red cap indicates
high side port. Blue cap indicates low side port. |
| Failure to inspect for residual
oil from previous recovery can result in adding extra oil to the current
vehicle being serviced. This will result in reduced performance and possible
compressor damage. |
| 1. |
Start vehicle and run with A/C On for
two minutes, then attach manifold gauge set to A/C system. Attach
recovery station inlet hose to center fitting of manifold gauge
set. |
| 2. |
Open both valves of manifold gauge
set. Ensure refrigerant tank vapor valve and liquid valve are open. |
| 3. |
Turn main power switch On. |
| 4. |
Depress compressor start switch. Amber
Compressor On light will come on and compressor will start. Compressor
will shutoff automatically when recovery is complete. |
| 5. |
Wait two minutes and inspect for pressure
rise. If pressure rise occurs, depress compressor start switch to
repeat recovery procedure. |
| 6. |
To drain receiver dehydrator of A/C
system oil, open receiver dehydrator pressurizing valve for 15 seconds
to allow compressor discharge pressure back into receiver dehydrator. |
| 7. |
Open oil drain valve slowly and drain
receiver dehydrator. When oil stops draining, close oil drain valve. |
| 8. |
Do not allow receiver dehydrator
to completely depressurize. |
|
Battery Ground Cable
Prior to service, disconnect battery
ground cable and isolate as required.
Radio Coded Theft Protection System
The "Theftlock" theft deterrent ...
The individual components of the
refrigerant system will often give clear signs of their malfunctioning.
Use the following general descriptions to pinpoint faulty components.
...
Precautions
System Inspection