7.6 Troubleshooting
7.6.1 Indication of "FAILURE" LED (red)
The flashing pattern of the "FAILURE" LED (red) differs depending on the type of abnormality/error.
When two or more failures are detected simultaneously, a high-priority failure is indicated. Also, the
failure signal is output from the "X2 REMOTE" connector. If an abnormality/error is found, take
measures in accordance with Table 38 to Table 42. DO NOT perform operations not mentioned in
Table 38 to Table 42.
Figure 52 - Failure output
Note: The STP-Link (optional accessory) and the display unit (optional accessory) display an error
as a message. Also, the errors being detected can be read via serial communication.