JAC HFC4DA1-2C, Maintenance Manual

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AT
AT
AT AT Air
Air
Air Air Conditioner
Conditioner
Conditioner Conditioner
- 173 -
Diagnosis and Testing
Refrigerant recovery
5. The refrigerant recovery machine shall start to
recover refrigerant and lubricating oil from A/C
system, which respectively flows into a fluid
reservoir and a removable oil reservoir.
6. Refrigerant recovery machine shall drain all
refrigerant out of A/C system, achieving partial
vacuum of A/C system with pressure at about 34
kPa (10 Hg).
7. Once partial vacuum is realized, it is recommended
to turn off the refrigerant recovery machine and
two manual valves and record the pressure
readings. If the vacuum reading rises up to positive
pressure in 2 min, there is still surplus refrigerant
(after boiling) in the receiver drier; therefore, you
should continue to execute the reclaimer until no
obvious positive pressure rise occurs.
8. Check the oil reservoir for oil recovery and record
the recovered volume, for the same volume of oil
shall be added into A/C system later.