Hi
I purchased a flying 9a fitted with a GRT EMS 4000
There no fuel flow so I fitted a red cube
My question is how do you tell if the 4000 is set up with the fuel flow option ?
Thanks for your help
 
Fuel flow

It most likely was not set up as it is an extra cost.
The good news is you can purchase the set up code
From GRT. This will allow you to program the unit.
Download the manual.
 
Flo-Cal

See if you have a Flo-Cal setting. If not, like reported above you can purchase the code.
Tim Andres