Samsung AC071MN4PKH Service Manual page 116

SW update
7-3. How to update the Micom(RS485)
Through RS485 communication.
Connect S-converter to F1,F2 line
Step 1
- F1,F2 terminal block on ODU
- F1,F2 connector on ODU's main pcb
- F1,F2 terminal block on IDU
Step 2
Execute S-net pro 2 and set environment then click connect button
Click Connect
USB to RS232 cable S-Converter
TX+ F1
TX+ F2
7-2
Outdoor unit
Main PCB