The PNG Immigration Authority is denying claims of deteriorating conditions at the Manus Island processing centre for asylum seekers.
Residents said recent changes at the centre had forced them to queue for an hour to receive food, which often ran out before everybody was served.
They also said the quality of food was low and the menu repetitive.
But the Authority denies this and said the residents received nutritious and culturally appropriate meals three times a day.
It said there had never been a shortage of food or drinking water at the centre.
Residents had also complained of deliberate power cuts to the centre's air conditioning.
The Authority said there had been occasional blackouts at the centre all of which were fixed within several hours.
A directions hearing of the PNG Supreme Court is scheduled for today as part of the asylum seekers' application for compensation for their detention at the centre, which the court ruled in April was illegal.