A320 is different as it does not have independent sensors like the 330/340.
If LGCIU 1 is not electrically supplied it will NOT indicate any lights on the panel, it is the only LGCIU hardwired to that panel and is therefore a non dispatch. If the LGCIU developed a fault not related to its power supply the LGCIU 2 can still use the channel to illuminate the lights, but THROUGH LGCIU 1 being supplied by the DC ESS bus. Trip the CB no panel lights!
The only way of telling that your LGCIU 1 has died is by your ECAM L1/2 caution telling you as such and the amber xx where your triangle used to be on the ECAM wheels page.
LGCIU 1 and 2 fault means no indication or control/monitioring hence gravity extension.
Last edited by Beeline; 10th July 2012 at 15:52.