Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 543
1A–40 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Checking The Refrigerant System With Manifold Gauge
Since Refrigerant-134a (HFC-134a) is used in the air
conditioning system in this vehicle, be sure to use
manifold gauges, charging hoses and other air
conditioning service tools for HFC-134a when
checking the refrigerant system.
Conditions:
D
Run the engine at idling
D
Air conditioning switch is “ON”
D
Run the blower motor at “HIGH” position
D
Temperature control lever set to “MAX COLD”
D
Air source selector lever at “CIRC”
D
Open the engine hood
D
Close all the doors
Normal Pressure:
D
At ambient temperature: approx. 25–30
°
C
(77–86
°
F).
D
At low-pressure side: approx. 147.1–294.2 kPa
(21.3–42.7 psi).
D
At high-pressure side: approx. 1372.9–1863.3 kPa
(199.1–270.2 psi).
Refer to the table on the refrigerant pressure-temperature
relationship in this section.
HFC-134a Pressure-Temperature Relationship
Pressure
Temperature
(kPa)
(psi)
(
°
C)
(
°
F)
36
5.3
–20
–4.4
67
9.7
–15
5
104
15
–10
14
147
21
–5
23
196
28
0
32
255
37
5
41
314
45
10
50
392
57
15
59
471
68
20
68
569
82
25
77
677
98
30
86
785
114
35
95
912
132
40
104
1059
154
45
113
1216
176
50
122