Check The Composition Of The Refrigerant - Mitsubishi Electric PQRY-P200YEM-A Service Handbook

9 9 9 9 9 CHECK THE COMPOSITION OF THE REFRIGERANT

Start
Test run all indoor units.
Are all units operating
stably? (Note 1)
YES
Is the refrigerant
composition of αOC
correct? (Note 2)
YES
Finished checking the
composition.
NO
NO
Check TH2, TH9, LPS and the CS
circuit block and correct any malfunc-
tions. (Note 3)
Is the
refrigerant composi-
tion of αOC correct?
(Note 2)
YES
Finished checking the
composition.
Calibrate the refrigerant composition
of αOC. (Note 6)
–153–
YES
NO
NO
Check that
NO
R407 is correctly
charged.
(Note 4)
YES
Finished checking the
composition.
Recharge the refrigerant.
(Note 5)