Troubleshooting Procedure Using; Manifold Gouge Set - Suzuki RA410 Manual

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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
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pressure sides indicated on the respective gauges of the manifold
gauge set.
ATTACHING MANIFOLD GAUGE SET
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1) Make sure that high pressure valve (1) and low pressure valve
(2) of manifold gauge are firmly closed.
2) Connect high pressure charging hose (3) to high pressure ser-
vice valve (5) on vehicle, and connect low pressure charging
hose (4) to low pressure service valve (6) on vehicle.
3) Bleed the air in charging hoses (3), (4) by loosening their re-
spective nuts on manifold gauge, utilising the refrigerant pres-
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sure. When a hiss is heard, immediately tighten nut.
CAUTION:
Do not interchange high and low pressure charging
hoses by mistake.
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 (with A/C idle up)
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 CFC-12, 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.
AIR CONDITIONING (OPTIONAL) 1B-7
30 – 35 C (86 – 95 F)
950 r/min.
Max.
Max. cooling
All open
Recirculation