Definitely could be, likely bad board.
SOURCE: evaporator comes on, but the condensor unit does'nt.
Have u checked at the compressor unit. There is a contactor than energizes the compressor is this contactor getting supply when u turn on the evaporator this contactor get energized see if this happens. If this is energized and you are getting supply to the compressor and compressor doesn't turn on 1.) compressor has thermal protection this might be faulty 2.) or the compressor has too much freon 3.) check if the windings of the compressor motor are not short to ground
SOURCE: installed new LG 18000 btu mini split heat pump,
a heat pump is a finely tuned machine that can be very efficient yet very frustrating at times. I could give you better advice if I were looking at the unit but hear are some things that may help. The unit has a defrost mode that cycles every 30,60,or 90 minutes. If you take the cover off of the condensing unit and near the top you will see the adjustor. unless you live in arctic or very humid cilimates, it should not be set to 30 min. Also the unit may be low on refrigerant. you can check this with a thermometer. put the therm. on the hot gas line(big one) and it should be 110 degrees hotter than the outside temp. Insulate the point of contact around the therm. and gas line. Also, your aux. heat may not be coming on to supplement the heat from the pump. i.e. the fusable link could have burned up and the heating element wouldnt be coming on(elec. models). there are too many variables and combinations of problems that could cause this.
SOURCE: Have AMCORAIRE mini-split purchased in
Try this link. They will be able to help you with your concerns.
The FixYa Team
Warning: Do not touch the
gold contact area on the back or the metal nozzles on the bottom of the
cartridges.
The control panel display will prompt you to load paper and press 
to print an alignment page.50 views
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