Isuzu 1999 RODEO Workshop Manual page 79

8. When finished with the refrigerant charging, close the
low pressure valve of the manifold gauge and
container valve.
9. Check for refrigerant leaks.
Checking The A/C System
1. Run the engine and close all the vehicle doors.
2. Turn A/C switch "ON", set the fan switch to its highest
position.
3. Set the air source lever to "CIRC", set the
temperature lever to the full cool position.
4. Check the high and low pressure of the manifold
gauge.
f Immediately after charging refrigerant, both high
and low pressures might be slightly high, but they
settle down to the pressure guidelines shown
below:
f The ambient temperature should be between
25–30°C (77–86°F).
f The pressure guideline for the high-pressure side is
approximately 1372.9–1863.3 kPa (199.1–270.2
psi).
f The pressure guideline for the low-pressure side is
approximately 147.1–294.2 kPa (21.3–42.7 psi).
f If an abnormal pressure is found, refer to Checking
The Refrigerant System With Manifold Gauge in
this section.
5. Put your hand in front of the air outlet and move the
temperature control lever of the control panel to
different positions. Check if the outlet temperature
changes as selected by the control knob.
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–51