Communication Error - Samsung AC052FBMDEH/EU Service Manual

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
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
Samsung Electronics
Yes
Yes
Yes
Yes
No
Terminate the service
No
Correct the wrong wiring
No
Correct the compressor wire connection
No
Correct the connection of communication cable
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