PREVOST LE MIRAGE XLII BUS SHELLS, Руководство по обслуживанию

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Section 22: HEATING AND AIR CONDITIONING
PA1564
6
Using the Up/Down type switch sets the fan
speed and the speed chosen is illustrated on the
window display.
NOTE
Upon starting, if the outside temperature is
above 32 °F (0°C) and then drops below 32 °F
(0°C), the compressor will keep running up to
a temperature of 15°F (-9°C) to prevent
condensation from forming on the windows.
NOTE
To perform a test of the driver's unit
windshield defroster, it is possible to run the
system without running the engine.
The following 2% error chart and table can be
used to troubleshoot the driver’s area air
temperature sensor and the outside air
temperature sensor.
NOTE
The driver’s area air temperature sensor is
located behind the grill of the R.H. side
console (Refer to fig.12).
Temp °C Temp °F Resistance Ohms
-40 -40 100865
-35 -31 72437
-30 -22 52594
-25 -13 38583
-20 -4 28582
-15 5 21371
-10 14 16120
-5 23 12261
0 32 9399
5 41 7263
10 50 5658
15 59 4441
20 68 3511
25 77 2795
30 86 2240
35 95 1806
40 104 1465
45 113 1195
50 122 980
55 131 808
60 140 670
65 149 559
70 158 468
75 167 394
80 176 333
85 185 283
90 194 241
95 203 207
100 212 178
105 221 153
110 230 133
115 239 115
120 248 100
125 257 88
130 266 77
135 275 68
140 284 60
145 293 53
150 302 47
5.2 CABIN UNIT OPERATION
The HVAC control module located on the R.H.
dashboard panel (Fig. 5), enables the selection of
the temperature in the cabin area (refer to the
Owner's Manual for details).
Temperature control is provided in conjunction
with a thermistor air temperature sensor located
amidships on L.H. side of vehicle, underneath the
wire mesh opening in the floor (Figs. 3 & 6).
The flow of water to the vehicle's main heater
core is controlled by an electric water valve which
varies the cycling rate depending on selected
temperature. A red LED, located on HVAC control
module illuminates when heating mode is
selected. A green LED illuminates when
compressor clutch is in operation.
FIGURE 6: EVAPORATOR COMPARTMENT
22178F
The evaporator fan motor, located in the
evaporator compartment, is protected by a 90
amps, manually-resettable (CB4) circuit breaker
mounted in the engine compartment, on the