SYSCTL VLNC2 Circuit Pack LEDs Compatible Software Operation
FAULT CR/MJ MN/ABN UPD/INIT ACO/TST	If compatible software is installed on the replacement circuit pack, the SYSCTL exibits the following visible cycles: 1. All LEDs light (CR/MJ, FAULT, MN/ABN, ACO/TST) for approximately 5 seconds. 2. CR/MJ & FAULT LEDs extinguish & the MN/ABN & ACO/TST LEDs remain lighted for approximately 15 seconds & then extinguish for 5 seconds. 3. MN/ABN & ACO/TST LEDs simultaniously light again for 8 seconds & then extinguish after 15 seconds. 4. CR/MJ LED flashes eleven times. 5. The LEDs return to the previous state (prior to the replacement) indicating that there is compatible software installed on the replacement circuit pack.
Factory Default SYSTCTL VLNC2 LEDs
FAULT CR/MJ MN/ABN UPD/INIT ACO/TST	If no software is installed on the replacement circuit pack (factory-fresh), the SYSCTL exibits the following visible cycles: 1. All LEDs light (CR/MJ, FAULT, MN/ABN, ACO/TST) for approximately 5 seconds. 2. CR/MJ & FAULT LEDs extinguish & the MN/ABN & ACO/TST LEDs remain lighted for approximately 15 seconds & then extinguish for 5 seconds. 3. MN/ABN & ACO/TST LEDs simultaniously light again for 8 seconds & then extinguish after 5 seconds. 4. CR/MJ LED flashes eleven times. On flashes 3, 4, 7, 8 & 11, the MN/ABN & ACO/TST LEDs simultaneously light while the CR/MJ LED flashes. On flashes 1, 2, 5, 6, 9 & 10, only the CR/MJ LED flashes. 5. CR/MJ LED remains lighted & the MN/ABN & ACO/TST LEDs simultaneously flash slowly (light for 2 seconds, extinguish at 2 seconds) indicating that the SYSCTL is factory-fresh.
Incompatible Software LEDs on SYSCTL VLNC2
FAULT CR/MJ MN/ABN UPD/INIT ACO/TST	If incompatible software is installed on the replacement circuit pack, the SYSCTL exibits the following visible cycles: 1. All LEDs light (CR/MJ, FAULT, MN/ABN, ACO/TST) for 5 seconds. 2. CR/MJ & FAULT LEDs extinguish & the MN/ABN LED lights & MN/ABN & ACO/TST LEDs remain lighted for 15 seconds & then extinguish for 5 seconds. 3. MN/ABN & ACO/TST LEDs simultaniously light again for 8 seconds & then extinguish after 5 seconds. 4. CR/MJ LED lights wile the ACO/TST LED flashes. 5. Find circuit pack with compatible software or boot code & repeat procedure or simultaneously depress the ACO/TST push-button & the UPD/INT recessed push-button on the faceplate of the SYSCTL until the FAULT LED lights. 6. MN/ABN & ACO/TST LEDs simultaniously light again for 15 seconds & then extinguish for 8 seconds. 7. MN/ABN & ACO/TST LEDs simultaneously light again for 10 seconds & then extinguish for 15 seconds. 8. CR/MJ LED remains lighted & the MN/ABN & ACO/TST LEDs simultaneously flash slowly (light for 2 seconds, extinguish at 2 seconds) indicating that the SYSCTL is now ready to accept a download.
SYSCTL VLNC52
FAULT	If a Circuit pack has failed, incoming electrical/optical signal failure will light the FAULT LED red and it will flash on & off in one-second intervals. If the FAULT LED is unlit circuits are functioning properly.
ACTIVE	If the ACTIVE LED is flashing means a Firmware Smart Apply may begin. If ACTIVE LED is solid green this means it is operating normally.