Galaxy VS NMC Communication Link Lost

[DLEFT]

Got a 100kW rated Galaxy VS that threw up an error:

• NMC 1: Communication link between NMC and SLC is lost. NMC is Connected 

The interface seemed to have locked up and required a press of the reset button the first time this happened. This came up a second time, but self-cleared after a few minutes. Is this potentially indicative of some larger issue with the NMC?

Firmware version 6.118.0.323

[Teken]

What do the NMC logs say and indicate?!? Do you see any cold starts of the NMC?!?

Verify everything related to the network cabling and infrastructure because it could also be related to the (Watch Dog) timer which can result in a self boot due to the fact it can’t communicate on the network. 

In early NMC 1 firmware the watch dog would not self boot. But, remain locked up and frozen in a unknown state until it was reset / POPO.

If there are no self boots logged in the system than eject the card and clean the contacts and insert / eject five times.

Validate all pins are fine and not corroded, bent, scratched.

Follow up with using approved electrical safe canned air and flush out the internal NMC enclosure housing and reinstall the NMC.

If the problem goes away you win . . . 

If the problem returns or begins to increase in frequency the next step is to format / erase the NMC to a factory default state.

If that solves the problem you win . . . 

If the problem remains reflash the NMC in case the firmware has been corrupted.

If that solves the problem you win . . . 

If not, the NMC 1 needs to be replaced assuming it’s still available as it’s long past EOL and supported!

If the NMC 1 is (embedded) you can complete all break fix’s in the list. If the none of the above resolve the problem you’re screwed and it’s time to replace the entire system.

Questions Ask . . . 👍