Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 94

5. RELAY BOARD (RELAY02- BOARD)
(1) CMB
CNX10
CNAC1
CH12 Power input
1 - 3 AC 208/230V
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[ III Outdoor Unit / BC Controller Components ]
CNIN
Relay drive output
CN01
CH12 Output
3 - 5 AC208/230V