The error code 'EC' means that the system has detected the unit is not performing as well as it should - so it has gone into a protection mode, to protect the compressor from being damaged.
This error can be caused by dirty filters so check the filters are clean. If the filters are clean then an engineer is required to check the refrigerant levels and recharge the system. To get in contact with an engineer about this problem you can contact us - so we can find the nearest and best engineer for you - via email at info@airconditioningcentre.com or call us at 0370 3344 556.