Patent ID: 7848852
Filing Date: 2010-12-07
Classification: F24F

Abstract:
1. An air conditioner comprising: an indoor unit and an outdoor unit which are connected via connection wiring; the connection wiring comprising two power lines for supplying a power from an external power source to the indoor unit via the outdoor unit, and one signal line for carrying out communication between the indoor unit and the outdoor unit; the indoor unit comprising an indoor side transmitting and receiving device which is connected to the signal line and employs a photocoupler, an indoor side switch device which is connected between one of the power lines and the signal line and brought into a closed state at a start of operation of the air conditioner from a standby state in which the supply of power via the outdoor unit is stopped, and an indoor control device which controls the indoor side switch device ; and the outdoor unit comprising an outdoor side transmitting and receiving device which is connected to the signal line and employs a photocoupler, and a load which is supplied with a power from the two power lines of the connection wiring, wherein the indoor control device of the indoor unit brings the indoor side switch device into the closed state so as to supply a power for startup from one of the power lines to the outdoor unit via the indoor side switch device and the signal line upon determining that the connection wiring lines which connect the indoor unit with the outdoor unit are not miswired, and does not bring the indoor side switch device into the closed state upon determining that the connection wiring lines which connect the indoor unit with the outdoor unit are miswired, on the basis of a reception output of the indoor side transmitting and receiving device at the start of the operation of the air conditioner from the standby state.