| 摘要 |
<p>An operation history stored in a circuit board prior to replacement is taken over by a replaced circuit board, and the operation history of a device is permitted to be cumulatively updated. In the case of replacing a control circuit board (231) of an outdoor device (23) with other control circuit board (241), the contents stored in the control circuit board (231) are transferred to the control circuit board (241), and then the boards are exchanged.The information to be cumulatively updated by the control circuit board (231), i.e., operation history of the outdoor device (23), for instance, especially a leak quantity of a cooling medium, is taken over by other control circuit board (241) from the control circuit board (231). Thus, even when the board is replaced, extra calculation of the leak quantity of the cooling medium is not required.</p> |
