Hi bojooth,
I think that you've really answered you own question when you observed that you purchased your Unit 5 years ago, and that the “spout” type drains from the Plan's balcony floors were there at that time; they've almost certainly been there since construction.
By all means speak with your Executive Committee (E/C) about the problem, and you may thereby ascertain what may be possible to remedy what is obviously a design fault; like perhaps extending / redirecting the “spout” outlets above your courtyard to the closest downpipe.
If you get a sympathetic response from your E/C, offer to draft an Item for inclusion on the Agenda of the next AGM about a possible remedy, and about an allocation of funds from the Sinking Fund to undertake the work.
If the E/C's response is unsympathetic, I'd draft the Agenda Item anyway and submit it to your Strata Manager with a CC to your E/C Secretary – in that way at least you'll get an opportunity to discuss the problem in a wider forum. In this scenario, you might consider canvassing other Owners who may have a similar problem with the “spouts”, and may support your Agenda Item at the AGM.