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HVAC
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7. MAINTENANCE
NOTE
“While starting the Vehicle itself after long
duration (more than 15 days), following procedure
need to be followed to meet AC performance.
Start the vehicle in AC & Blower OFF conditions
in idling for 2-3 minutes, then switch on the AC
and Blower & run it for 2~3 minutes for circulation
of refrigerant & oil to lubricate the internal parts of
AC system”.
A. PRELIMINARY INSPECTION
i) AC SYSTEM PERFORMANCE TEST
1. Place the vehicle in a ventilated, shaded area
free from wind.
2. Check that the surface of the condenser is not
restricted with dirt, leaves, flies, etc. Clean as
necessary.
3. First conduct the open door test followed by
closed door test as mentioned below:
The following conditions to be confirmed before
starting the test:
Vehicle stationary with all doors open
Engine Speed
1500 rpm
FOR MANUAL HVAC
Blower Speed
4
th
AC Switch
ON
Temperature Knob
Max. Cool
Vent Knob
Chest
Air Intake
Recirculation air mode
ii) OPEN DOOR TEST
TEST DURATION: 10 min.
INITIAL VEHICLE CONDITIONS
Run the vehicle in the above condition with all doors
open for 10 min. At the end of 10 min insert the
probe at the front vent and record the readings simi-
larly insert the probe at the rear vent and record the
reading.