| 摘要 |
PURPOSE:To permit to grip the outline of contents of received transmission signal easily and restore a trouble in a short period of time by a method wherein the flashing period of indicating unit, such as light emission diode or the like, is made different in accordance with the contents of the transmission signal. CONSTITUTION:When the transmission signals are transmitted from signal transmission units 21, 21' by the number of corresponding bits, indicating units D5, D6 are flashed by the number of bits corresponding or equal to said corresponding bits. Accordingly, the outline of contents of the received signal can be gripped easily by the confirmation of number of times of flashing in the indicating unit. As a result, when the operation of the air-conditioning machine is stopped due to some trouble, it is decided that some accommodated equipment is troubled in case the receiving of respective transmission signals is normal while it is decided that the trouble is in a transmission circuit in case the receiving of either one of transmission signals is not good. According to this method, restoration of trouble may be effected easily in a short period of time.
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