Troubleshooting Procedure Using Manifold Gauge Set; Attaching Manifold Gauge Set; Troubleshooting Information; Corrective Measures For Malfunction Symptoms - Suzuki Baleno Manual

1B-14 AIR CONDITIONING (OPTIONAL)
1. Low pressure gauge
2. High pressure gauge
3. Low pressure valve (closed)
4. High pressure valve (open)
5. High pressure service valve
6. Charging hoses
7. Low pressure service valve
TROUBLESHOOTING PROCEDURE USING
MANIFOLD GAUGE SET
This procedure enables the technician to discover and repair cool-
ing problems by having the pressures of both the high and low
pressure sides indicated on the respective gauges of the manifold
gauge set.

ATTACHING MANIFOLD GAUGE SET

1) Make sure that high pressure and low pressure valves of man-
ifold gauge are firmly closed.
2) Connect high pressure charging hose to high pressure service
valve on vehicle, and connect low pressure charging hose to
low pressure service valve on vehicle.
3) Bleed the air in charging hoses by loosening their respective
nuts on manifold gauge, utilizing the refrigerant pressure. When
a hiss is heard, immediately tighten nut.
CAUTION:
Do not interchange high and low pressure charging
hoses by mistake.
If the compressor is equipped with service valves with
different thread diameters, the smaller is the high
pressure side, and the larger the low pressure side.

TROUBLESHOOTING INFORMATION

1) Beginning on the next page, the manifold gauge pressure val-
ues shown have been obtained under conditions listed below.
However, keep in mind that the actual on-the-vehicle readings
are somewhat affected by the ambient temperature.
A/C inlet air temperature
Engine rpm
Blower switch
Temperature control
Doors
Air inlet damper position
2) Since the operating pressure for the HFC 134a refrigerant at
high temperatures is higher than that of the R12, the gauge
readings will be slightly higher.
CORRECTIVE MEASURES FOR MALFUNCTION
SYMPTOMS
Starting on the next page, gauge readings, conditions, causes, and
measures (classified according to malfunction symptoms) will be
discussed.
30 – 355C (86 – 955F)
1,500 rpm
Max.
Max. cold
All open
Recirculation