Midea MCH2U-18PHH2 Service Manual page 65

Multi outdoor/ condensing units multi zone
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Remark:
Use a multimeter to test the DC
voltage between black pin and
white pin of signal wire The normal
value should be around 5V.
Use a multimeter to test the DC
voltage between black pin and red
pin of signal wire. The normal value
should be around 12V.
65

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