max iterations exceded in CHT
 

i tried CHT with 2 fluids above a solid but unfortunately i am getting Maximum Iteration exceed on the fluid solving part, i tried changing the relaxation factor and even MaxIter_ , it was not beneficial. And the temperature involved is around 270 to 370 K and other BCs are seem to be fine.any suggestions??
And second doubt i have is, how can i confirm if solid and fluid patches are coupled.Because i made three cellzones using salome. and used splitMeshRegions -cellZone in Foam to form separate polymesh file. After splitting the interface automatically was categorized as type mapped wall.Is my procedure right??. This question arise because my solid temperature haven't changed a bit.

P.S: i saw many threads on "Maximum Iteration exceed" but i was not able to solve, which made me to post this