Samsung AC026MNNDKH Service Manual page 57

4-4 Troubleshooting by symptoms
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
Restart after power off.
Is the communication error occurred again?
Is the connection of power cable and
communication cable normal?
Is the power is normal?
(check the LED Lamp
Exchange the indoor unit PBA.
Is the communication error occurred again?
Exchange the outdoor unit PBA.
4-26
Yes
Yes
Yes
Yes
Yes
No
Terminate the service
No
Correct the wrong cable
No
Exchange the PBA of no power unit
No
Terminate the service.
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