Indoor Controller Board - Mitsubishi Electric PAA-A18AA1 Service Manual

11.5.2. Indoor controller board

PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
CN105
CN25
CNER
CN41
CNSC
CN32
SWE
SW1
SW2
CN3C
SWE: Emergency operation
SW01: Model selection
SW02: Capacity setting
CN105: Interface Connector
CN32: ON/OFF Lockout Input
CN22: For MA remote controller cable connection (10-13 VDC)
CN51: Error Status Output
CN41: JAMA standard HA terminal
CN44: TH02 Pipe Temp. thermistor/Liquid; TH05 Cond./Evap
Temp
CN4F: Float sensor
CN20: Thermistor (Inlet temperature)
CN24-1: W/W1 (Heat) Command signal
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
CN22
CNF
CN90
51
CN24-2: W2 (Aux Heat) Command
signal
CN3C: Indoor-outdoor
CNXA2
transmission (0 - 24 VDC)
CN90: Wireless remote controller
CNXC2
CNXA2: Connect to the indoor
CNXB2
power board
CNXB2: Connect to the indoor
power board
CN51
CNXC2: Connect to the indoor
CN2L
power board
CNER: ERV/ damper input
CN24-2
(optional)
CN27
CN2C: ERV/damper output
CN2C
CN25: Humidifier output
CN24-1
CNF: Humidifier input (required)
CN20
CN2L: ME System status signal
CN27: G (fan) Command signal
CN4F
CNSC: Y/Y2 (High Speed Fan)
CN44
Command signal
© 2022 Mitsubishi Electric US, Inc.