Hi There

Can Anyone suggest why the last two units on the system will not run.

Outdoor is a p250 R410a and has 10 ic. one bc and a g50.
g50 is set up for floors 2 and 1 not 0 which i am working on.

8 of the indoor units work fine but units addressed 37 and 38 will not work they contiually ho. the mitsibishi maintenace tool which we plug on to the remote controller shows 37 and 38 and its port nos. so looks like the m-net is picking it up.

I have self addressed the two remotes so it stops ho-ing but when you switch the remote on it does nothing and then switches the remote off.

the maintenance tool shows i have not duplicated any addresses. i ahve changed the remote controller for one that works have swapped one of the main pcbs with one that works. have pulled in a new transmission cable from the last working unit to the one that dont work.

also changed remote cable, checked the index is not over capacity, checked dip switches are right and checked power gettin 240 going on to the board, indoor fan. any clues ???????????