just a personal opinion, i had revived several phalenopsis by using mounting them to a fern slate with the root exposed for good aeration and water them twice daily. and i would definitely avoid direct sun before new good roots appears. a well lighted area away from direct sun would be better. sometimes i even trimmed about 2/3 of the big leaves away if the roots are not in good condition (to reduced transpiration rate by reducing surface leave area).
currently i am reviving one phalenopsis by using SH technique after having the roots "cured". good luck.