1060 / 1119
FATC
37
NOTE
The above table is applicable if the ambient RH
is 40%.
For RH higher than 40% refer the graph below
for acceptable temperatures:
FRONT VENT
d) LEAK DETECTION
a. Visual Detection:
Look out for oil leaking from
joints, as compressor oil is mixed with refrigerant it
also circulates along with it, hence it might also leak
at the joints. If leakage is found rectify, if not proceed
with any of the test mentioned below to confirm leak-
age.
b. Ultra fluorescent Leak Detector:
The compres-
sor oil used is pre-mixed with a fluorescent dye.
Using a specially designed UV lamp inspect the
components. If there is a leakage the colored dye
glows bright. This test can pin point small leakages.
c. Electronic Leak Detector:
This test is done using
an electronic leak detector
1. Place the vehicle in a well ventilated area, free
from wind, as leakage can be dissipated without
detection in a windy area.
2. Follow the instructions issued by the manufactur-
er of the particular leak detector being used.
3. Commence searching for leaks by passing the
detector probe around all joints and components.
NOTE
Refrigerant gas is heavier than air.
4. Insert the probe into an air outlet of the evapora-
tor or into the evaporator drain tube.
5. Switch the air conditioning blower on and off at
intervals of ten seconds. Any leaking refrigerant
will be gathered in by the blower and detected.
6. Insert the probe between the magnetic clutch and
compressor to check the shaft seal for leaks.
7. Check all service valve connections.
8. Check the condenser for leaks at the pipe unions.
9. If any leaks are found, the system must be dis-
charged before rectification.
10.Rectify any leaks and recheck for leaks during
evacuation prior to charging.
(c) Using Soap Solution/ Leak detector spray:
A
leak detector spray or soap solution can be used to
detect the leak by spraying it at the joints. If there is
a leak bubbles are formed.