For 1990-2009 cars only
Evacuation Procedure
- Make sure that there is sufficient R-134a refrigerant for charging:
- Connect the high side hose to the vehicle.
- Connect the low side hose to the vehicle.
- Open both the high (4) and low (6) side valves on the control panel.
- Open the red LIQUID valve on the tank.
- Open the blue GAS (vapor) valve on the tank.
- Evacuate the system.
- Enter the desired evacuation time on the unit keypad.
- Press ENTER and the display will blink, indicating the input of data.
- Press VACUUM (4) in order to start the vacuum pump:
- Observe the display for the following:
- Press the HOLD/CONT keys (2) at the 12 minute mark (indicating the pump has run for 3 minutes) on the display in order to stop the vacuum pump.
- Take the vacuum reading:
- When the vacuum sequence has run the programmed time, the display shows CPL, indicating that the evacuation is complete.
| 2.1. | Simultaneously press RESET (7) and ENTER (5). |
| 2.2. | Press 6. |
| 2.3. | If the display reads less than 16 kg (36 lb), add refrigerant to the tank. Refer to the manufacturer's instructions. |
Important: In order to properly remove all of the air and dry the A/C system, the unit automatically goes to a pre-programmed evacuation cycle.
| • | The display counts down the vacuum time to zero (0) in order to indicate the time remaining. |
| • | The display reads RECYCLE five seconds after the vacuum pump starts and continues while the process takes place. |
| • | Automatic refrigerant recycling during each evacuation is a feature of the ACR4 system. No action is required by the technician. |
| • | The control panel MOISTURE indicator (5) must be green during recycling in order to verify that the moisture content is within specifications. Yellow indicates a set condition requiring a filter/drier cartridge change. See the manufacturer instructions for this procedure. |
| • | Noncondensable gases (mostly air) are automatically vented from the tank during the recycling process. An audible sound of pressure release may be heard as this happens and is a normal function. |
| • | (0) reading: |
| - | Inspect for a major system leak. Refer to Leak Testing . |
| - | Repair the leak before resuming this procedure. |
| • | 91-101 kPa (27-30 in Hg) indicated: |
| - | Close the high (4) and low (6) side valves. |
| - | Observe the vacuum level. |
| - | If a 91-101 kPa (27-30 in Hg) vacuum is not maintained, diagnose the A/C system for a leak before resuming the evacuation procedure. Refer to Leak Testing . |
| - | After a 91-101 kPa (27-30 in Hg) is maintained, open the high and low side valves. |
