Mitsubishi Electric PUHZ-W90VHA Service Manual page 28

Air to water heat pump
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Interface circuit board
CNIF1
Connect to the outdoor
controller circuit board
CNIF2
Connect to the outdoor
controller circuit board
CNIF3
Input signal
Connect to the
terminal block
(TB2, TB3)
CNIF4
Output signal
Connect to the terminal block
(TB3)
28

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