Fault Code Guide
3. Place the sheet of paper on a clean, flat surface
and place a ruler on the impression. Line the
ruler up with one of the fin marks.
4. Count the number of fin marks from the zero-
inch (zero-mm) mark to the two-inch (51-mm)
mark on the ruler. Divide the number of fins
counted by 2 to obtain the approximate number
of fins per inch. For example, 29 fins divided by
2 equals 14.5 or approximately 14 fins per inch.
Temperature/Pressure Specifications for a Vehicle With a Small Cooling Package
*
and a 14-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% 45–53°F (7–12°C)
77–142
(531–979)
8–31
(55–214)
Cycling
Off about 1 minute; On about 2
minutes
High 55% 45–56°F (7–13°C)
82–181
(565–1248)
8–45
(55–310)
Cycling
Off about 1 minute; On about 4
minutes
80°F
(27°C)
Low 25% 45–52°F (7–11°C)
103–176
(710–1213)
11–37
(76–255)
Cycling
Off about 1 minute; On about 5
minutes
High 55%
50–59°F (10–
15°C)
177–182
(1220–1255)
17–18
(117–124)
On On steady
90°F
(32°C)
Low 25%
51–53°F (11–
12°C)
206–210
(1420–1448)
17–18
(117–124)
On On steady
High 55%
58–60°F (14–
16°C)
225–231
(1551–1593)
23–24
(159–165)
On On steady
100°F
(38°C)
Low 25% 57–58°F (14°C)
256–258
(1765–1779)
22–23
(152–159)
On On steady
High 55%
67–69°F (19–
21°C)
282–288
(1944–1986)
29–30
(200–207)
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, about 13.5 vdc
• 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
*
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 2, Temperature/Pressure Specifications for a Vehicle With a Small Cooling Package and a 14-fpi Condenser
Cab Heater and Air Conditioner, Valeo
83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009 400/3