Is it possible to have Fujitsu inside units with Toshiba outside units?

[lucas.severyn]

Them switches are isolators and kill the power to the outdoor units. The isolators are currently switched off. Why are they off? Has you neighbour got 5 Toshiba air conditioning systems in there flat? Have you seen the Fujitsu units in your flat cool and heat before.

One way for all four to go down at once is if the outdoor units were too noisy for your neighbour and he switched off the isolators. But you saying your units are Fujitsu.

Neighbour has only one Daikin. I tried switching them all to on but no reaction or sound. They are all "on" now.

Our units are Fujitsu (at least the wall remotes are Fujitsu)

The units went down when the flat below us was uninhabited. We used the Fujitsu system for over a year before it went down as part of the power surge.

is your system a multisplit ie. four indoors connected to one out door then you are looking for an outdoor with four sets of pipes connected to it, just a thought.

That's a good call thank you. Is it possible to have several outdoor units sharing the cooling of one system?