7B-13 Air Conditioning System:
˚F ˚C %
82.4 28
80.6 27
70
78.8 26
er
77.0 25
75.2 24
“E”
73.4 23
71.6 22
69.8 21
V
entilation Louv
68.0 20
Humidity
66.2 19
64.4 18
Acceptable range
62.6 17
60.8 16
30
59.0 15
.
at Air Outlet of Center
57.2 14
55.4 13
T
emp
53.6 12
“F”
51.8 11
50.0 10
48.2 9
46.4 8
25 30 35 ˚C
77 86 95 ˚F
Temp. near Air Inlet of HVAC unit
I4RS0A720009-
Thermometer at center duct
Condition Possible cause Correction
Crossing point is higher Insufficient or excessive charge of refrigerant Check refrigerant pressure.
than acceptable range Dirty or bent A/C evaporator fins Clean or repair.
(“E” area) Air leakage from cooling (heater) unit or air duct Repair or replace.
Malfunctioning, switch over function of door in Repair or replace.
cooling (heater) unit
Compressor malfunction Check compressor.
Crossing point is lower Insufficient air volume from center duct (Heater Check blower motor and fan.
than acceptable range blower malfunction)
(“F” area) Compressor malfunction Check compressor.
NOTE:
If ambient temperature is approximately 30 °C (86 °F), it is possible to diagnose A/C system in detail
referring to the following table.