Suzuki Liana RH413, Service Manual

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7B-3 Air Conditioning System: Manual Type
• Never use heat for bending pipes. When bending a pipe, try to make its bending radius as slight as possible.
• Keep internal parts of air conditioning free from moisture and dirt. When disconnecting any line from system, install
a blind plug or cap to the fitting immediately.
• When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to seats of coupling nuts
and O-ring.
• Never reuse O-rings. Always use new one.
• When tightening or loosening a fitting, use two wrenches, one for turning and the other for support.
• Tighten flared nut and bolt to the following specified torque.
Tightening torque
Flared nut: 13 N·m (1.3 kgf-m, 9.5 lb-ft)
Bolt: 10 N·m (1.0 kgf-m, 7.5 lb-ft)
• Route drain hose so that drained water does not make any contact to vehicle components.
• If pipes or hoses are replaced, replenish specified amount of compressor oil to compressor suction side by referring
to “Operation Procedure for Refrigerant Charging”.
General Description
A/C Evaporator Inlet Air Temperature Sensor
and A/C Evaporator Outlet Air Temperature
Sensor Construction
S3RH0A7211001
These sensors send the signals of the A/C evaporator
inlet and outlet air temperature to ECM. And, ECM
controls the A/C operation as follows.
• ECM calculates the A/C ON/OFF operation
temperature by comparing the A/C evaporator inlet air
temperature with the A/C evaporator outlet air
temperature. And, ECM controls A/C ON/OFF using
the A/C ON/OFF operation temperature.
• In DEF/FOOT or DEF air flow mode, ECM turns off
the A/C operation by detecting the A/C evaporator
outlet temperature at less than 3.5
°
C (38.3
°
F). (The
A/C operation come back at more than 5
°
C (41.0
°
F))
Refrigerant Type Construction
S3RH0A7211002
Whether the A/C in the vehicle being serviced uses
HFC-134a (R-134a) or CFC-12 (R-12) is indicated on
compressor label (1). Also, it can be checked by the
shape of the service (charge) valve (2).
2
HFC-134a
(R-134a) CFC-12
(R-12)
1
I3RH01720003-01