I cant seem to find any information for one which looks like my front mech, but I was sure it was the 4703...I bought the groupset and everything else looks like the 4703.
the model number is written on the back of the mech. Just read it off.
I think that both versions of FC-4703 have the same pull ratio, are designed to work with the same shifters and the same chainset.
This FD is designed to work with an 11T
middle to big ring interval. This means if it is set to a normal height above the big ring, and you are using a 9t interval, it won't work, simple as that. Probably you will be able to see the cage clouting the middle ring.
For this FD to work with a 9T interval the FD will have to be set at about 4mm higher than normal, i.e. to clear 5-6mm above the big ring instead of 1-2mm as per the normal recommendation. IME this is high enough that the chain will be at some risk of unshipping off the big ring occasionally.
As per a previous post, if the chainline is wrong (wrong length BB spindle fitted) then this will stop the FD from working too.