Samsung AQV12NSA Service Manual page 69

Troubleshooting
12-2-13 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 error?
2. Troubleshooting procedure
Restart after power off.
Is the communication error
occurred again?
Isn't the power cable
and communication cable error?
Is the connection of
communication cable normal?
Is it the outdoor
2 Micom(Inverter + Main) model?
Exchange the outdoor unit PCB.
12-15
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No
Yes
No
Yes
No
Yes
No
Yes
Terminate the service.
Correct the wrong wiring.
Correct the connection of
communication cable.
Exchange the indoor/outdoor unit PCB.
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