Mitsubishi Electric CRHV-P600YA-HPB Service Handbook page 153

[ IX Troubleshooting ]
10
<MAIN> high-pressure check joint
<SUB> high-pressure check joint
HWE1312A
1. Perform evacuation with a vacuum pump from the
high-pressure check joints.
<MAIN> low-pressure check joint
(Evacuating the system through the low-pressure check joint
will cause the oil in the refrigerant system to be discharged,
resulting in compressor malfunction.)
2. While evacuation is being performed, assemble the unit by
performing the procedure in reverse in the order of 6→5→4→
3.
3. Perform refrigerant charging from the high-pressure check
joints.
(Be sure to perform refrigerant charging from the
high-pressure check joints so that a back pressure is not
applied to the compressor.)
4. Attach the cover of the control box and the service panels to
complete the procedure.
<SUB> low-pressure check joint
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GB