Fault Code Guide

Temperature/Pressure Specifications for a Vehicle With a Large Cooling Package, a Behr Condenser, and an
Auxiliary HVAC Unit
*
Ambient
Air
Temp.
Humidity
(approximate)
Dash Outlet
Temperature
(approximate)
Auxiliary
Unit Lower
Louver
Temperature
Service Port Pressures
A/C
Compressor
Status
A/C Compressor Status
Comments
High Side
psi (kPa)
Low Side
psi (kPa)
70°F
(21°C)
Low 25%
43–50°F (6–
10°C)
45–53°F
(7–12°C)
73–114
(503–786)
14–40
(97–276)
Cycling
On about 26 seconds; off
about 15 seconds
Medium 50%
44–53°F (7–
12°C)
47–54°F
(8–12°C)
74–119
(510–820)
16–42
(110–290)
Cycling
On about 35 seconds; off
about 13 seconds
High 70%
45–54°F (7–
12°C)
49–58°F
(9–14°C)
73–120
(503–827)
16–45
(110–310)
Cycling
On about 48 seconds; off
about 10 seconds
80°F
(27°C)
Low 25%
46–54°F (8–
12°C)
49–56°F
(9–13°C)
88–143
(607–986)
18–44
(124–303)
Cycling
On about 48 seconds; off
about 11 seconds
Medium 50%
48–50°F (9–
10°C)
54–56°F
(12–13°C)
145–150
(1000–1034)
24–26
(165–179)
On On steady
High 70%
54–55°F (12–
13°C)
59–61°F
(15–16°C)
158–164
(1089–1131)
28–29
(193–200)
On On steady
90°F
(32°C)
Low 25%
50–51°F (10–
11°C)
56–57°F
(13–14°C)
177–182
(1220–1255)
25–26
(172–179)
On On steady
Medium 50%
58–60°F (14–
16°C)
64–66°F
(18–19°C)
194–199
(1338–1372)
32–34
(221–234)
On On steady
High 70%
62–63°F
(17°C)
68–69°F
(20–21°C)
195–207
(1344–1427)
35–37
(241–255)
On On steady
100°F
(38°C)
Low 25%
58–59°F (14–
15°C)
64–66°F
(18–19°C)
227–235
(1565–1620)
31–33
(214–228)
On On steady
Medium 50%
67–68°F (19–
20°C)
71–72°F
(22°C)
242–247
(1669–1703)
40–41
(276–283)
On On steady
High 70%
74–75°F (23–
24°C)
79–81°F
(26–27°C)
261–265
(1800–1827)
49–50
(338–352)
On On steady
Test conditions:
• engine at 1500 rpm
• engine fan locked on
• normal A/C mode, outside air
• blower speed on high
• cab doors open
• hood open
• parked out of direct sunlight
*
Refer to "Temperature/Pressure Specification Tables" to determine whether the vehicle has a small or large cooling package.
Table 5, Temperature/Pressure Specifications for a Vehicle With a Large Cooling Package, a Behr Condenser, and
an Auxiliary HVAC Unit
Cab Heater and Air Conditioner, Valeo 83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009400/6