Samsung AQ09VFUAGM/CV Service Manual page 90

AC zero cross signal error
Indoor display
Outdoor display
1.Checklist :
1) Check the power condition at customer's house (Is there any power noise?)
2) Have been there power failure?
2. Troubleshooting procedure
Restart a er power o
Is the AC line zero cross signal error
appeared again?
Exchange the Outdoor PBA
YES
Outdoor error
AC zero cross signal error
NO Terminate the
service
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