Fault Code Guide

Temperature/Pressure
Specification Tables (EPA07
compliant vehicles)
Before using the temperature/pressure specifications
in Table 7, Table 8, Table 9, and Table 10, deter-
mine what condenser is installed on the vehicle. To
do so, identify the vehicle rating, or measure the con-
denser. See Table 6 for condenser identification.
Condenser Identification: EPA07 Compliant Vehicles
Vehicle
Rating
Condenser
Width: in.
(cm)
Height: in.
(cm)
M2 106 (MD) Valeo MD-1 27 (69) 20 (52)
M2 112 (HD) Valeo HD-1 33 (84) 19 (48)
Table 6, Condenser Identification: EPA07 Compliant
Vehicles
Day Cab with Valeo MD–1 Condenser
Ambient
Air
Temp.
Humidity
(approximate)
Dash Outlet
Temperature
(approximate)
Service Port Pressures
A/C
Compressor
Status
A/C Compressor Status Comments
High: psi
(kPa)
Low: psi
(kPa)
70°F
(21°C)
Low 25%
51–59°F (11–
15°C)
70–130
(483–896)
10–60
(69–414)
Cycling On 6 sec; Off 9 sec
Med 50%
53–59°F (12–
15°C)
74–130
(510–896)
10–52
(69–359)
Cycling On 6 sec; Off 10 sec
High 70%
55–62°F (13–
17°C)
75–130
(517–896)
11–58
(76–400)
Cycling On 7 sec; Off 8 sec
80°F
(27°C)
Low 25%
53–60°F (12–
16°C)
92–130
(634–896)
12–56
(83–386)
Cycling On 7 sec; Off 8 sec
Med 50%
55–61°F (13–
16°C)
90–150
(621–1034)
13–60
(90–414)
Cycling On 11 sec; Off 7 sec
High 70% 52°F (11°C) 143 (986) 18 (124) On On steady
90°F
(32°C)
Low 25%
52–58°F (11–
14°C)
120–160
(827–1103)
15–50
(103–345)
Cycling On 11 sec; Off 5 sec
Med 50% 55°F (13°C) 169 (1165) 21 (145) On On steady
High 70% 61°F (16°C) 177 (1220) 25 (172) On On steady
100°F
(38°C)
Very Low 10%
51–56°F (11–
13°C)
140–185
(965–1276)
16–55
(110–379)
Cycling On 19 sec; Off 5 sec
Low 25% 54°F (12°C) 187 (1289) 21 (145) On On steady
Medium 40% 60°F (16°C) 196 (1351) 26 (179) On On steady
Test conditions:
• engine at 1500 rpm
• engine fan locked on
• 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
Table 7, Day Cab with Valeo MD–1 Condenser
Cab Heater and Air Conditioner, Valeo 83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009 400/7