Mazda CX-7 2007 Workshop Manual page 1150

REFRIGERANT RECOVERY
Warning
• Avoid breathing air conditioning refrigerant or lubricant vapor. Exposure may irritate eyes, nose
and throat. Also, due to environmental concerns, use service equipment certified to meet the
requirements of SAE J2210 (R-134a recycling equipment) when draining R-134a from the air
conditioning system. If accidental system discharge occurs, ventilate work area before resuming
service.
1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device manufacturer's
instructions.
End Of Sie
REFRIGERANT PRESSURE CHECK
1. Connect the manifold gauge. (See 07-10-2 REFRIGERANT SYSTEM GENERAL PROCEDURES.)
2. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.
3. Set the fan speed MAX HI.
4. Turn the A/C switch on.
5. Set to RECIRCULATE mode.
6. Set the temperature control to MAX COLD.
7. Set to VENT mode.
8. Close all the doors and all the windows.
9. Measure the ambient temperature and high- and low- pressure side reading of the manifold gauge.
10. Verify that the intersection of the pressure reading of the manifold gauge and ambient temperature is in the
shaded zone.
• If there is any malfunction, inspect the
refrigerant system according to the
troubleshooting chart.
End Of Sie
REFRIGERANT SYSTEM PERFORMANCE TEST
1. Inspect the refrigerant pressure. (See 07-10-6 REFRIGERANT PRESSURE CHECK.)
2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.
3. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.
4. Set the fan speed to MAX HI.
5. Turn the A/C switch on.
6. Set to RECIRCULATE mode.
7. Set the temperature control to MAX COLD.
8. Set to VENT mode.
9. Close all the doors and windows.
10. Wait until the air conditioner output temperature stabilizes.
Stabilized condition
• The A/C compressor repeatedly turns on and off at regular intervals.
11. After the blower air is stabilized, read the dry-bulb thermometer.
07-10–6
REFRIGERANT SYSTEM
MPa
2
{kgf/cm , psi}
HIGH-PRESSURE SIDE
2.5
{25, 355}
2.0
{20, 284}
1.5
{15, 213}
1.0
{10, 142}
LOW-PRESSURE SIDE
0.15
{1.5, 22}
0.10
{1.0, 14}
10 15 20
{50}
{59} {68} {77}
AMBIENT TEMPERATURE °C {°F}
id071000800500
id071000800600
25 30 35 40
{95}
{86} {104}
acxuuw00000775
id071000800700