HI there
It might be better to post the electrical forklift errors as a separate thread. So it will be easier to get the correct info.

The 7FB series

For some reason I could not find an A5 error but found a 71 error which seems to relate to Tire angle sensor abnormality and gives a few options to check.

However an A5 error code on another type electrical toyota states brake potentiometer abnormality.