HAIMA 7 - Page 444

Troubleshooting
U-34
Step Inspection Action
9
Inspect refrigerant pipeline
l Inspect refrigerant pipeline for the
following items.
— Is refrigerant pipeline free of damage and
crack?
— Are refrigerant pipeline joints free of oil
stain? (visual inspection)?
— Is refrigerant pipeline joints free of air
leakage?
— Are refrigerant pipeline installation points
on condenser free of air leakage?
— Are refrigerant pipeline installation points
on a/c compressor free of air leakage?
— Are refrigerant pipeline installation points
on a/c unit free of air leakage?
— Perform leakage inspection using air
leakage tester.
l Are all above items normal?
Yes Go to next step.
No If any damage or crack found, replace
the damaged parts, then go to step 19.
If no damage or crack found, go to step
12.
10
Inspect evaporator pipe joints in a/c unit for
air leakage.
l Are refrigerant pipeline joints of evaporator
in front and (or) rear a/c unit free of air
leakage?
Yes If the compressor generates noise, add
10ml (l0cc.0.338 fl oz) of compressor oil
to the a/c compressor. Verify that the
noise is no longer heard.
Adjust refrigerant to specified quantity,
then go to step 19.
No If refrigerant pipeline is damaged or
cracked, replace it, then go to step 19.
If there is no damage, go to next step.
11
Inspect evaporator pipe joints in a/c unit for
looseness.
l Are evaporator joints in a/c unit loose?
Yes Tighten joints to specified torque. If the
compressor generates noise, add 10ml
(l0cc.0.338fl oz) of compressor oil to the
a/c compressor. Verify that the noise is
no longer heard.
Adjust refrigerant to specified quantity,
then go to step 19.
No
If the compressor generates noise, add
10ml (l0 cc.0.338fl oz) of compressor oil
to the a/c compressor. Verify that the
noise is no longer heard.
Replace o-ring on refrigerant pipeline,
adjust refrigerant to specified quantity,
then go to step 19.