Samsung AM012FN1DCH/AA - Internal PCB Communication Error of the Outdoor Unit C-Box

Troubleshooting
4-70 Samsung Electronics
4-4-27 Internal PCB Communication error of the Outdoor Unit C-Box
Outdoor unit display
Indoorunit display ×(Operation) ስ (Reservation) ስ (Blast) ×(Filter) ×(Defrost)
Judgment Method
 PCB does not respond to the invoked Main PCB
Cause of problem  C-Box internal Inverter PCB, Fan PCB, Hub PCB defective
1.
Cause of problem
Replace Hub PCB
Replace Fan PCB
(Fan PCB TX part : Breakage)
Replace Connection wire
Check the connection status
(CN12 connector)
Fan PCB CN13 connection
No
No
No
Yes
Yes
Yes
Connection wire of
Hub PCB/Main PCB did confirmation?
(Verify the broken wire)
Lighting of Fan PCB LD41 did confirmation?
Is Fan PCB CN13 connector accurately connected?
E206 C001
E206 C002