SC672-13
Communication error between operation panel and CTL after normal start-up;
Operation panel not detected.
• SC672 does not appear on the SMC report, as it is not logged.
• The Smart Operation Panel communicates with the controller via a USB cable and IPU. SC672 is
triggered when the panel cannot communicate with the controller.
Cause:
Possible causes of SC672 include:
• USB communication path failure (USB cable, IPU)
• CTL boot up error and/or operation panel boot up error due to abnormal break in operations of
CTL.
Possible causes of operation panel cannot light include:
• USB communication path failure (USB cable, IPU)
• Operation panel cannot communicate with CTL due to CTL boot-up error
[A]: Operation Panel
[B]: IPU
[C]: FCU
[D]: Controller
[E]: USB cable
Solution:
Do the following.
6. Troubleshooting
1068
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