samsung AVQ18JA/AVQ18JAX no idoor fan

[leeving]

Hello,

Newbie here I have a problem with samsung split unit ductless heat pump. The indoor fan won't run in heat mode. So far all I've tested are both pcb's both say no error's normal operation. The fan runs fine in all other modes.

[VRVIII]

I would suggest checking the indoor coil sensor most of these units have a preheat function that holds the fan off until the coil is up to temp in heating mode.

Have you checked the operating pressures in heating mode?