ATE Core Configurations Generation 2 systems possess status LEDs on the front and rear I/O panels that indicate if the rack is currently in an error state.

Note When main power is switched on by switching the main breaker on the PEP to the on position, the red status LED will illuminate for a moment. The green status LED will illuminate after the rack enters the RCU Booting power state.
The state of an ATE Core Configurations Generation 2 system can be determined from the status LEDs using the following table.
Table 61. Status LED Pattern Interpretations
Status LED State Status Indication
Solid green No errors
Blinking red one time Device and/or sensor initialization error
Blinking red two times Software error
Blinking red three times Hardware error