Mitsubishi

[ballvalve]

I have a system with 10 indoors and 3 lossnay units and 1 ae200.
each lossnay unit is on a different floor.
when I connect the lossnay units to the mnet I am getting the dreadful 6607 fault.
system works with only one lossnay connected but when I connect the other two it goes into fault.
the lossnay units are not interlocked with any indoor.
do you still have to set the main/sub switch on the other two lossnay units even though they are on differant floors?

[Neddy]

Have you addressed the lossnays? They should be the last 3 addresses on the system. Have you entered the addresses into the AE200?