Handcuffed on BU Battery test

[Italiancowboy]

So I need to do a BU Battery test but as I follow the instructions (power up, remove main batter power, hit "stay on" button) but when I get to the step that says hit button 8 to start the BU Battery test . . . I can't. Button 8 is "blocked" with a Caution flag (ADSB offline, BU Battery test needed, Other display off line, etc.) and I can't seem to clear that Caution to be able to use Button 8 to initiate the BU Battery Test.

What am I missing ?

 

[Bob Y]

I do know the system needs to have a good GPS fix to establish the time/date of the testing, so be sure you have the avionics tuned on and a good GPS fix. Don’t know if that’s your issue, but thought I’d share that tidbit of information.

 

[Italiancowboy]

I tried going outside the hanger for GPS signal. Still can't use Button 8 to start the test.

I was told that sometimes you need to put the pitot tube cover on because it if picks up an indication of air speed from the wind, it won't let you do the test while "in motion". I'll try that next.

 

[swatson999]

Try keeping ship's power on, clear the rest of the alarms, start the test and power off the main buss immediately after the test starts.

 

[jakej]

Try keeping ship's power on, clear the rest of the alarms, start the test and power off the main buss immediately after the test starts.

Agree completely - in addition - clear alarms first, turn off the main bus & then you’ll get a message asking about ‘staying on’ or “Bat Test”. Press on that ‘button‘ & it will do the Bat Test procedure for ~ 45 mins. Suggestion here after you clear the ‘warnings’ - read the info at the bottom of the screen when you turn the Battery master off .