Wiring Diagram - Mitsubishi Electric PAA-A18AA1 Service Manual

6. WIRING DIAGRAM

Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
28
Symbol Explanation
P.B. Power Supply Board
I.D.U. Indoor Unit Control Board
R.B. Relay Board
F01 Fuse, AC250V 10A
F02 Fuse, AC250V 6.3A
Return Air Thermistor
CNH05
CN105 Interface Connector
SW01 Switch (for Model Selection)
SW02 Switch (for Capacity Selection)
SW05 Switch (for Mode Selection)
CNF Humidifier Input (required)
CN25 Humidifier Output
TH2 Pipe Temp. thermistor/Liquid
CN44
TH5 Cond./Evap Temp
TB-A Terminal Block - A
TB-B Terminal Block - B
TB-C Terminal Block - C
CN4F Float Switch
CN2A 0-10v Fan Control Input
CN24-1 Backup Heat (1st stage)
CN24-2 Backup Heat (2nd stage)
CNER ERV/Damper Input (optional)
CN2C ERV/Damper Output
ME system status signal
CN2L
CN32 ON/OFF Lockout Input
CN51 Error Status Output
G/Y Fan
W/W1 First Stage Furnace
W2 Secondary Stage Furnace
Y/Y2 High Speed Fan
R 24VAC Power From Furnace
C 24VAC Return To Furnace
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