Samsung Electronics 4-21
4-4-1 Communication error
1. 1.Checklist :
1) Is the cable between the indoor unit and outdoor unit connected correctly?
2) Isn't the power cable and communication cable cross?
2. Troubleshooting procedure
Yes
Restart after power off.
Terminate the service
Exchange the indoor unit PBA.
No
Is the communication error occurred again?
Yes
Correct the wrong cable
No
Is the connection of power cable and
communication cable normal?
Yes
Exchange the PBA of no power unit
No
Is the power is normal?
(check the LED Lamp
Yes
Yes
Terminate the service.
No
Is the communication error occurred again?
Exchange the outdoor unit PBA.
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