How to recover from a failed APU start (because of manually shutting it of while starting)

[idenwen]

Title says it already. 

• Battery power on
• APU on
• APU off before fully started (by clicking it's button again)
• APU never switches on again.

How to correctly recover from that?

[admiki]

It looks like you drained your battery.

I tried it a couple of times until I got to the point where it wouldn't spool up at all.

I also did a fresh test, where I started the APU, turned it off mid-start and was able to just start it back up.

[Dr_Pavelheer]

Try connecting ground power

[shagrat]

Assuming it is correctly implemented, already:

Wait 30 seconds before starting the APU a second time, after the compressor has spooled down. If the second attempt fails wait 20 minutes, no more than three failed attempts.