Fault Code Guide

Day Cab with Valeo HD-1 Condenser
Ambient
Air
Temp:
°F (°C)
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 (21)
Low 25%
50–56°F (10–
13°C)
80–100
(552–689)
12–53
(83–365)
Cycling On 4 sec; Off 11 sec
Med 50%
52–56°F (11–
13°C)
80–95 (552–
655)
13–52
(90–359)
Cycling On 5 sec; Off 10 sec
High 70%
53–58°F (12–
14°C)
85–105
(586–724)
14–55
(97–379)
Cycling On 6 sec; Off 6 sec
80 (27)
Low 25%
52–58°F (11–
14°C)
120–125
(827–862)
16–58
(110–400)
Cycling On 6 sec; Off 9 sec
Med 50%
54–60°F (12–
16°C)
120–125
(827–862)
18–60
(124–414)
Cycling On 12 sec; Off 8 sec
High 70%
53–61°F (12–
16°C)
120–135
(827–931)
19–59
(131–407)
Cycling On 26 sec; Off 4 sec
90 (32)
Low 25%
51–57°F (12–
14°C)
125–150
(862–1034)
18–59
(124–407)
Cycling On 7 sec; Off 5 sec
Med 50% 51°F (12°C) 155 (1069) 21 (145) On On steady
100 (38)
Very Low 10%
52–63°F (11–
17°C)
140–170
(965–1172)
18–60
(124–414)
Cycling
On 19 sec; Off 4 sec, then On 6 sec;
Off 9 sec
Low 25% 50°F (10°C) 175 (1207) 20 (138) On On steady
Med 40% 54°F (12°C) 180 (1241) 23 (159) 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 9, Day Cab with Valeo HD-1 Condenser
Cab Heater and Air Conditioner, Valeo 83.00
Specifications
Business Class M2 Workshop Manual, Supplement 15, March 2009 400/9