Samsung AS09HPB Service Manual page 72

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