Error Display And Countermeasures - Hitachi SD.LINK User Manual

6.6.2 Error display and countermeasures

The module front-panel ERR LED glows when a fatal error is detected. Communication has
shut down and the only way to resume it is by resetting the module (or cycling its power).
To find out why the ERR LED has glowed, make the checks suggested below. Make these
checks also when reference to "6.6.2 Error display and countermeasures" is directed is "6.6.1
Trouble detection and solution" or operations are felt erratic.
• With the S10mini, is the SD.LINK module (LQE030/530) mounted in the mount base, left-
justified?
• With the S10mini, are three or more units of the SD.LINK module (LQE030/530) not
mounted? With the OD.RING module (LQE010/015/510/515) combined, are three or
more units not mounted?
• With the S10V, are three or more units of the SD.LINK module (LQE530) not mounted?
With the OD.RING module (LQE510/515) combined, are three or more units not mounted?
• Is the module number switch set correctly?
• Is the CPL number switch set correctly?
• Are optical fiber cables meeting defined specifications (such as length) used?
If no problems are found by these checks, reset the CPU or LPU module.
If the same problem recurs, cycle the power. If the problem persists, the module may have
failed. Replace the module. Even though the problem is cleared by resetting the CPU or LPU
module (or cycling the power), if the ERR LED glows again after a while, the module most likely
has failed. Replace the module.
If the same problem recurs after the replacement of the module, contact your dealer.
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6 MAINTENANCE