Fault Code Guide

Temperature/Pressure Specifications for a Vehicle With a Small Cooling Package
*
and a 19-fpi Condenser
†
Ambient
Air
Temp.
Humidity
(approximate)
Dash Outlet
Temperature
(approximate)
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%
43–52°F (6–
11°C)
81–107
(558–738)
8–53
(55–365)
Cycling
On about 12 seconds; off about 12
seconds
High 55%
48–55°F (9–
13°C)
93–120
(641–827)
11–51
(76–352)
Cycling
On about 15 seconds; off about 8
seconds
80°F
(27°C)
Low 25%
45–52°F (7–
11°C)
108–144
(745–993)
9–44
(62–303)
Cycling
On about 20 seconds; off about 9
seconds
High 55%
49–51°F (9–
11°C)
140–149
(965–1027)
13–15
(90–103)
On On steady
90°F
(32°C)
Low 25%
49–50°F (9–
10°C)
170–187
(1172–1289)
16–17
(110–117)
On On steady
High 55%
57–59°F (14–
15°C)
185–191
(1276–1317)
23–24
(159–165)
On On steady
100°F
(38°C)
Low 25%
55–57°F (13–
14°C)
210–220
(1448–1517)
22–23
(152–159)
On On steady
High 55%
66–68°F (19–
20°C)
234–242
(1613–1669)
30–32
(207–221)
On On steady
Test conditions:
• engine at 1500 rpm
• engine fan locked on (six-blade viscous with lock
brackets)
• normal A/C mode, outside air
• blower speed on high
• cab doors open
• hood open
• parked out of direct sunlight
• no wind speed or less than 5 mph (8 km/h)
• stabilize at each point
• the condenser is mounted below the charge air
cooler
• no wind speed or less than 5 mph (8 km/h)
*
Refer to "Temperature/Pressure Specification Tables" to determine whether the vehicle has a small or large cooling package.
†
Refer to "Temperature/Pressure Specification Tables" to determine the number of fins per inch on the condenser.
Table 3, Temperature/Pressure Specifications for a Vehicle With a Small Cooling Package and a 19-fpi Condenser
Cab Heater and Air Conditioner, Valeo 83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009400/4