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1.The vehicle to be tested
should be in a place that is not in direct
sunlight.
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2.The ambient condition
should be 20 to 35°C at dry-bulb temperature, 50 to
80% at relative humidity.
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3.Equalize the vehicle
compartment air with the ambient air by opening the hood,
the doors and the buck door fully.
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4.
| caution |
- Place the quick joint onto the service
valve, and press to fit the part A
securely until the sleeve clicks into
place.
- When connecting, run your hand along the
hose while pressing to ensure that there
are no bends in the hose.
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Connect the charging hose (red) to the high-pressure
side of the gauge manifold with it closed. Then connect the
high-pressure quick joint to the charging hose (red), and
fit it to the high-pressure service valve (incorporated in
vehicle-side liquid pipe B).
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5.
| caution |
- Place the quick joint onto the service
valve, and press to fit the part A
securely until the sleeve clicks into
place.
- When connecting, run your hand along the
hose while pressing to ensure that there
are no bends in the hose.
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Connect the charging hose (blue) to the low-pressure
side of the gauge manifold with it closed. Then connect the
low-pressure quick joint to the charging hose (blue), and
fit it to the low-pressure service valve (incorporated in
vehicle-side suction flexible hose).
6.Start the
engine.
7.Set the A/C controls as
follows:
When the front A/C test
- A/C switch: A/C - ON
position
- Mode selection: FACE position
- Temperature control: MAXIMUM COOLING
position
- Air selection: RECIRCULATION position
- Blower switch:Fast position
When the rear A/C test
- The front A/C should be set as above
- A/C switch: A/C ON position
- Temperature control: MAXIMUM COOLING
position
- Blower switch:Fast position
8.Adjust engine speed to 1,500 r/min with
A/C clutch engaged.
9.Measure the high
pressure, and ensure that the measurement is within the
permissible range described in the chart.
| note |
Prior to the measurement, wait
until the refrigerant pressure is stable
(approximately 10 minutes after the engine is
started).
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10.Measure the low pressure, and ensure that
the measurement is within the permissible range described in
the chart.
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11.
| caution |
Set a thermometer so that cool
air blows against the sensing part
directly.
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Set a thermometer in the air outlet on the
instrument panel.
12.
| caution |
Set a wet and dry bulb
thermometer so that cool air does not blow
against it.
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Set a wet and dry bulb thermometer in the air
intake.
13.Wait until the air outlet temperature
is stable (approximately 10 minutes after the A/C
starts), and measure wet-bulb temperatures at the air outlet
and the air intake.
14.
| caution |
On completion, stop the engine
and wait until the high-pressure side of the
gauge manifold is depressurised. Then remove the
quick joints and the others.
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The air outlet temperature should satisfy the
graph.
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