Hi All,

First time posting on here so bear with me please. I have had a phone call today from a customer complaining of a fault with his AC unit. Its a Daikin twin split unit; Indoor Model-FTXS35D3VMW;
Outdoor Model-4MXS80E7V3B1. The information that he has given me is that when its switched on nothing happens in cool and heat mode, however the fan only mode works. The green power light on the indoor unit is flashing continuously as well when the indoor is switched on. This is the same on both indoor units coming of the one outdoor. Any help in narrowing down where to start with the fault finding. There is no fault code to go off and also I haven't been to the site to check the outdoor units yet.

Appreciate any help given thanks.