Mazda MX-6 1998, Workshop Manual

Page: 917 / 1282

REFRIGERANT SYSTEM
REFRIGERANT SYSTEM GENERAL PROCEDURES
W 6 U 7 1 0 W 0 3
M anifold G auge Set Installation
1. Fully close the valves of the manifold gauge.
2. Connect the charging hoses to the high- and
low-pressure side joints of the manifold gauge.
3. Connect the quick couplers to the ends of the
charging hoses.
4. Connect the quick couplers to the charging valves.
REFRIGERANT SYSTEM PERFORMANCE TEST
1. Warm up the engine and run it at a constant 1,500
rp m .
2. Set the fan switch at 4th position.
3. Turn the A/C switch on.
4. Set the RECIRCULATE mode.
5. Set the temperature control to MAX COLD.
6. Set the VENT mode.
7. Close all the doors and windows.
8. Wait until the center ventilator temperature
stabilizes.
9. Measure the center ventilator temperature.
10. Measure the ambient temperature.
11. Verify that the intersection of the center ventilator
temperature and the ambient temperature is in the
shaded zone.
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• C f F )
10{50) -
O 9 (48} -
8 {46} -
7
{45} -
W ? 6 {43} .
> <
c c c r 5(4 1 } -
LU LU
h - CL L -
Z 2 2 0 2 5 3 0 3 5 4 0 # C
O K ( 6 8 } { 7 7 } { 8 6 } { 9 5 } { 1 0 4 } { T }
AMBIENT TEMPERATURE
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12. If not as specified, troubleshoot the refrigerant
system. (Refer to
0 7 -0 1
SYMPTOM
TROUBLESHOOTING.)
REFRIGERANT PRESSURE CHECK
1. Install the manifold gauge set.
2. Warm up the engine and run it at a constant 1,500
rp m .
3. Set the fan switch at 4th position.
4. Turn the A/C switch on.
5. Set the RECIRCULATE mode.
6. Set the temperature control to MAX COLD.
7. Set the VENT mode.
8. Close all the doors and windows.
9. Measure the ambient temperature and the highl­
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.
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MPa {kgf/cm 2, psi}
AMBIENT TEMPERATURE
W6U710WA3
MANIFOLD
GAUGE
CHARGING HOSE
CHARGING
HOSE
\ f t f t / QUICK COUPLER
QUICK COUPLER D H
(ft I CH A RG IN G
C A P
0
, A VALVE OF
CHARGING VALVE OF
LOW-PRESSURE SIDE
SIDE
W 6 U 7 1 0 W A 1
0 7 -1 0 -2