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Servicing
TURN OFF all the power switches.
2.11.2 Replacing Refrigerant Oil (Clogging in Return Oil Circuit) and Replacing Return Oil Circuit
(1) Remove the front service cover according to the item 2.1 “Removing Front Service Cover”.
(2) Remove the electrical box, wirings and E-box stay according to the item 2.6 “Removing Electrical Box”
(3) Close (A) high / low pressure gas stop valve and (C) liquid stop valve, then open (B) low pressure gas stop valve.
NOTE:
For heat recovery system, If the refrigerant piping are removed, seal (B) low pressure gas stop valve with a copper cap
at the brazing portion before open it.
(4) Collect the refrigerant in the outdoor unit from (E) low pressure check joint and (F) high pressure check joint. Check that
the pressure will not increase at this time.
NOTE:
If the pressure increases, collect all the refrigerant in the refrigerant cycle.
Tool Adjustable Wrench or Spanner
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