Hi there. I have a Fujitsu AST12LSACW/AOT12LSAC heatpump that has an issue. When I turn it on and put it into, say, heating mode the operation light stays lit and the timer light starts flashing 1 second on 1 second off. The outdoor unit does nothing although it is getting power and the interconnecting wiring is correct. I can hear the indoor 'click' to signal the outdoor but this is when the timer light starts to flash. I suspect it is some sort of signal error but as I dont have a manual I cant be sure. Any help would be greatly appreciated.