A/C Performance Testing

Performance Test:

Performance Temperature Chart:

1. The vehicles to be tested should be in a place that is not in direct sunlight.
2. Close the high and low-pressure valve of the gauge manifold.
3. Connect the charging hose (blue) to the low-pressure valve and connect the charging hose (red) to the high-pressure valve of the gauge manifold.
4. Install the quick joint (for low-pressure) to the charging hose (blue), and connect the quick joint (for high-pressure) to the charging hose (red).
5. Connect the quick joint (for low-pressure) to the low-pressure service valve and connect the quick joint (for high- pressure) to the high-pressure service valve.

NOTE: The high-pressure service valve is on discharge pipe B, and the low-pressure service valve is on the suction hose.

CAUTION: To connect the quick joint, press section A against the service valve until a click is heard. When connecting, run your hand along the hose while pressing to ensure that there are no bends in the hose.

6. Start the engine.
7. Set the A/C controls as follows:
- A/C switch: A/C - ON position
- Mode selection: Face position
- Temperature control: Max. cooling position
- Air selection: Recirculation position
- Blower switch: HI (Fast) position

8. Adjust engine speed to 1,000 r/min. with A/C clutch engaged.
9. Warm up the engine with doors and windows closed.
10. Insert a thermometer in the left center A/C outlet and operate the engine for 20 minutes.
11. Note the discharge air temperature.

NOTE: If the clutch cycles, take the reading before the clutch disengages.