One or multiple indoor units in VRV system don't turn on while others work normally
Fix Steps:
1
Check individual indoor unit power supply and circuit breaker
2
Verify indoor unit is not in "Off" mode via its dedicated remote
3
Check if unit address is correctly set (requires technical manual)
4
Inspect communication wiring between non-working unit and outdoor
5
Test emergency operation switch on problematic indoor unit
6
Check for error codes on non-functioning units
7
Verify refrigerant pipe valves are fully open for that indoor unit
8
Check electronic expansion valve operation
9
Reset communication: Power off entire system 10 minutes, restart
10
Contact DAIKIN service if communication wire or PCB issue suspected