Product specifications

Samsung Electronics 4-22

4-5-12 Communication error

1. Checklist :

1) Is the communication cable between the indoor unit and outdoor unit connected correctly?

2) Isn’t the power cable and communication cable wiring error?

2. Troubleshooting procedure

Yes

Restart after power off

Is the communication erroroccurred again?

Isn't the power cable andcommunication

cable wiring error?

Is the connection of communication cable normal?

Is insuration resistance between each compressor

terminal and body normal?

Exchange the outdoor unit PCB

Terminate the service

Correct the wrong wiring

Correct the compressor wire connection

Correct the connection of communication cable