A/C System Testing - Aston Martin V8 Vantage Workshop Manual

Air Conditioning (A/C) System (12.03)
Climate Control (12.00)

A/C System Testing

It is recommended that a free standing air mover is placed
in front of the condenser / cooling system.
Pressure Check
1. Connect the Recovery / Recycling / Recharging unit.
2. Start the engine. Allow to warm up then run at a
constant 1,500 rpm.
3. Set the following A/C controls:
• Air Circulation to 'Recirculate'
• Temperature to 'Max' Cold
• Air Flow to 'Vent'
4. Close all the vehicle doors and windows.
5. Measure the ambient temperature and high / low
pressure side reading of Recovery / Recycling /
Recharging unit gauges.
6. Verify that the intersection of the pressure reading of the
Recovery / Recycling / Recharging unit gauges and the
ambient temperature is in the shaded zone.
2.0
{20, 284}
HIGH-PRESSURE SIDE
1.5
{15, 213}
1.0
{10, 142}
0.5
{5.1, 73}
0.2
{2.0, 28}
0.15
{1.5, 22}
0.1
{1.0, 14}
0.05
{0.5, 7.3}
10
{50}
AMBIENT TEMPERATURE
If there is any fault, inspect the refrigerant system according
to the troubleshooting chart.
Performance Test
1. Check the refrigerant pressure.
2. Place a dry-bulb thermometer in the driver-side center
ventilator outlet.
3. Start the engine. Allow to warm up then run at a
constant 1,500 rpm.
4. Set the A/C unit fan speed to 'Max Hi'.
5. Turn the A/C system on.
6. Set the following A/C controls:
• Air Circulation to 'Recirculate'
• Temperature to 'Max' Cold
• Air Flow to 'Vent'
12-3-10
LOW-PRESSURE SIDE
25
15 20 30
{59} {77} {95}
{68} {86}
°C {°F}
7. Close all the doors and windows.
8. Wait until the A/C output temperature stabilizes.
The A/C compressor repeatedly turns on and off at regular
9. After the blower air is stabilized, read the dry-bulb
thermometer.
10. Verify the ambient temperature.
11. Verify the temperature is in the shaded zone.
12 {54}
10 {50}
8 {46}
6 {43}
4 {39}
2 {36}
If there is any fault, inspect the refrigerant system according
to the troubleshooting chart.
Vacuum Check
1. Stop the vacuum pump, note the high and low pressure
side readings of the Recovery / Recycling / Recharging
unit gauges and wait for 5 min.
2. Check the high and low pressure side readings of the
Recovery / Recycling / Recharging unit gauges.
1 If the readings have changed, inspect for leaks and go
to Evacuation (Refer to 'Evacuation', page 12-3-9).
35
40
{104}
2 If the readings have not changed, go to Charging
(Refer to 'Charging', page 12-3-9).
Workshop Manual
Stabilized condition.
intervals.
15 25
20
10
{77}
{59} {68} {86}
{50}
AMBIENT TEMPERATURE
°C (°F)
35 40
30
{95}
{104}
October 2005