Lennox MMA048S4 User Manual

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17. Single and Multi-Zone Outdoor Control Connections
Inverter Outdoor PCB
24K Mono MainPCB
Port Descripon Voltage
CN1Power output for4-way valve 230V/AC
CN6
Power outputfor compressor
heater
230V/AC
CN3Port forL-in230V/AC
CN9Power output for chassis heater230V/AC
CN4Port forN-in
CN29 N-out forIPM board
CN37 L-out forIPM board 230V/AC
CN28
Port forcommunicaonwith
indoor unit
CN26 Port fortest board 5V/DC
CN21 Communicaon with IPMboard 12V, 5V/DC
CN7
Power outputfor discharge (T5)
temperature sensor
5V/DC
CN18 Power output for EEV 12V/AC
CN18
CN3
CN6
CN4
CN1
CN29
9
CN28
8
CN26
6
CN21
CN37
7
CN9
CN7
Main Chip
EEPROM
Digital
Display
Check
Buon
PCB Code: 17122300001076
Figure 24. Typical Component Locations (MLB018S4M-1P, MPC024S4M-1P,
MPC018S4M-2P, and MPC036S4M-1P

Lennox MMA048S4 Specifications

General

Brand	Lennox
Model	MMA048S4
Category	Air Conditioner
Language	English