ERT Open in Greek at 0900UTC on May 11, but nothing after 1000UTC

GREECE   ERT Open in Greek at 0900UTC on May 11, but nothing after 1000UTC:
from 0900 on  9420 AVL 170 kW / 323 deg to WeEu
from 0900 on 11645 AVL 100 kW / 182 deg to NoAf is off in A-15??
from 0900 on 15630 AVL 100 kW / 285 deg to WeEu, co-ch VIRI Dari
But no signal in the next day, May 12 in 0500-0900UTC time slot.