10 Year Old Fujitsu Aircon Replacement

[CRV48 2]

Hi would like to consult experts here with regards to replacing old air cons with new.

My aircon brand is Fujitsu and i was just wondering if its possible to get all 6 of the units and 2 compressor change with minium work.

ie the pipes and trunkings not changed. Can this be done, reason being we're not ready to renovate the house only wana change the old air con with new. Can this be done? and can we choose any brands we want or do we need to stick to Fujitsu???

Any experts could advice???? Thanks in advance....