LG air conditioner c5 error

LG and C5 fault codes occur when there is lack of communication between the indoor and outdoor units. Most likely, the wire connecting the units is damaged, or there is a problem in the control board. Please, check all wires and connections between the units. If the problem persists, use  professional technical help. You may see the following indications:

LG AC Fault Definition: poor contact between indoor and outdoor units

  • Flashing Light (5)
  • Display (Indoor Outdoor)
  • Indoor Operation (OFF)