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FATC
30
STEP
INSPECTION
ACTION
8
Verify whether malfunction is in expan-
sion valve or receiver/drier. Turn A/C
switch off and air conditioner stop for 10
minutes start motor turn both A/C switch
and fan switch on. Does malfunction
occur after compressor turn on?
Yes
Go to next step
No
Replace condenser and vacuum refriger-
ant line more than 30 minutes by vacuum
pump, and refrigerant to specified level
(Since water has intermixed in receiv-
er/drier and it is saturated, replacement is
necessary.)
9
Verify that expansion valve diaphragm
damage?
Yes
Replace expansion valve.
(Since valve
closes too much replacement is neces-
sary)
No
Install heat-sensing tube securely in prop-
er position.
10
Inspect refrigerant lines
•
Is piping free of damage and
cracks?
•
Are piping connections free of oil
grime? (visual inspection)
•
Are piping installation points on a/c
compressor free of gas leakage?
•
Are piping installation on cooling
unit free of gas leakage?
•
Perform gas leak inspection using
gas leak tester. Are above items
okay?
Yes
Go to next step
No
If piping or an A/C component is damaged
or cracked, replace it.
11
Inspect evaporator piping connections
in cooling unit for gas leakage are pip-
ing connections for evaporator in
cooling unit free of gas leakage?
Yes
If the vane makes a noise, add 10ml of
compressor oil to the A/C compressor.
Verify that the noise is no longer heard.
Adjust refrigerant to specified amounts
No
If piping is damaged or cracked, replace
it. If there is no damage, go to next step
12
Inspect evaporator piping connections
in cooling unit for looseness
Yes
Tighten connections to specified torque. If
the vane makes a noise, add 10 ml of
compressor oil to the A/C compressor.
Verify that the noise is no longer heard.
Adjust refrigerant to specified amounts.
No
If the vane makes a noise, add 10 ml of
compressor oil to the A/C compressor.
Verify that the noise is no longer heard.
Replace O-ring on piping, adjust refriger-
ant to specified amounts