Indoor Unit External Input/Output Circuit Board - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[4-2 Circuit Board Components ]
4-2-7

Indoor Unit External Input/Output Circuit Board

TB23 (Input with voltage)
ON/OFF
BS_04_C
CN53
Indoor control board (No.1)
To CN51
TB21 (Input no voltage)
ON/OFF
CN54
Indoor control board (No.2)
To CN51
TB22 (Relay contact output)
No.1 operation status
No.1 error status
No.2 operation status
No.2 error status
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