Suzuki Liana RH413, Service Manual

Page: 864 / 1302

7B-25 Air Conditioning System: Manual Type
NOTE
• If the system does not indicate –100 kPa (–
1.0 kg/cm 2 , –760 mmHg, –14.7 psi), close
both valves, stop vacuum pump and watch
movement of low pressure gauge.
• Increase in the gauge reading suggests
existence of leakage. In this case, repair
the system before continuing its
evacuation.
• If the gauge shows a stable reading
(suggesting no leakage), continue
evacuation.
5) Evacuation should be carried out for at least 15
minutes.
6) Continue evacuation until low pressure gauge (11)
indicates –100 kPa (–1.0 kg/cm 2 , –760 mmHg, –14.7
psi), and then close both valves (8), (10).
7) Stop vacuum pump (7), and then disconnect center
charging hose (6) from pump inlet. Now, the system
is ready for charging refrigerant.
Checking of A/C System for Pressure Leaks
After completing the evacuation, close manifold gauge
high pressure valve and low pressure valve, and then
wait 10 minutes. Verify that low pressure gauge reading
has not changed.
CAUTION
!
If the gauge reading moves closer to “0”,
there is a leak somewhere. Inspect the tubing
connections, make necessary repairs, and
evacuate system once again, making sure
that there are no leaks.
Procedure of Charging
CAUTION
!
• Always charge through low pressure side
of A/C system at after the initial charging is
performed from the high pressure side
with the engine stopped.
• Never charge to high pressure side of A/C
system with engine running.
• Do not charge while compressor is hot.
• When installing tap valve to refrigerant
container to make a hole, carefully follow
directions given by manufacturer.
• A pressure gauge should always be used
before and during charging.
• The refrigerant container should be
emptied of refrigerant when discarding it.
• The refrigerant container should not be
heated up to 40
°
C (104
°
F) or over.
• Refrigerant container should not be
reversed in direction during charging.
Reversing in direction causes liquid
refrigerant to enter compressor, causing
troubles, such as compression of liquid
refrigerant and the like.
NOTE
The air conditioning system uses HFC-134a
(R-134a).
Described here is a method to charge the air
conditioning system with refrigerant from the
refrigerant service container.
When charging refrigerant recovered by
using the refrigerant and recycling
equipment (when recycling refrigerant),
follow the procedure described in the
equipment manufacturer’s instruction
manual.
Charging procedure
Charge proper amount of refrigerant accurately in
accordance with the following procedure.
Specified amount of refrigerant
500
±
30 g (17.65
±
1.05 oz)
The initial charge of the A/C system is performed from
the high pressure side with the engine stopped.
And next, this method must be followed by charging from
the low pressure side with the engine running.
1) Check to make sure that hoses are routed properly
after evacuating the system.
2) Connect Low charging hose (1) and High charging
hose (2) of the manifold gauge set (3) in position.
Thus, open refrigerant container valve (4) to purge
the charging line.
3) Open the high pressure side valve (5) and charge
refrigerant to system.
11
10
2
1
4
3
9
6
7
5
8
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