If your Philips iron comes with DynamIQ, this is its default setting. This setting will produce the right amount of steam automatically during movement of the iron. If you want to have less steam, please switch to the ECO mode: this will allow you to iron using less steam.
When your iron is set to Max steam, a powerful constant steam flow is produced continuously for stubborn creases. If you want to have less steam, please switch to the DynamiQ or ECO mode.