| 摘要 |
PROBLEM TO BE SOLVED: To prevent the erroneous decision of detecting reverse air flow by the voltage of a fan motor and the voltage at the time of generating the reverse air flow by clearing the counted abnormal detection number of times by the outdoor controller of an outdoor unit only when the reverse flow is detected after the set reverse flow detection inhibiting time of a fan motor. SOLUTION: If a malfunction occurs in a fan motor 1 or a driving circuit 2 during driving of the motor 1, a malfunction signal is transmitted to an outdoor controller 5, and the malfunction number of times is sequentially stored in the controller 5. At this time, the motor 1 is abnormally stopped. After the motor 1 is abnormally stopped, a reverse flow detection inhibiting time counter 11 starts counting, and if the reverse air flow occurs after 60sec is elapsed, a reverse flow detector 4 detects the reverse flow, and transmits a reverse flow detection signal to the controller 5. The controller 5 which receives the reverse flow detection signal from the detector 4 clears the data of the malfunction number of times stored so far. |
