The Daikin indoor unit starts up when the system is switched off

If the Daikin AC unit is starting up despite having all the zones switched off, the AC unit's Stand-by parameter may be set. You can see how to deactivate it in the following video ( Daikin communication gateway ).

In any case, you should access the service settings in the Daikin thermostat and set the following parameter:
Service settings > Field settings > 1e-2-01