77= door open input issue,
Door is opening but input
"open end" or "open end B"
does not change. Door
open limit inactive for
period of time determined
by parameter
OPENINGLIMIT

Check your door open limit switch, could be faulty

87=
Car door contact does not open. Input broken or override wire. After certain time after
door open command
input is checked..
Stuck at level door
opened.
When input is
back in correct
state.
Override the input.