从加热操作中，直到需要进行规定的判定处理起经过的时间的判定时间，基于所述室内单元（20），室外机（10）的吸入温度的开始遥控器（30）是包括压缩机 操作量减小控制用于降低的操作容量，或确定是否或不执行用于停止压缩机的运转的运转停止的控制。 工作容量降低控制的执行过程中的远程控制器（30）中，如果吸入温度高于设定温度时，或者当太阳辐射通过至少一个太阳辐射传感器测量（40）等于或高于处于下降趋势，操作容量 结束降低控制的执行。 此外，操作停止控制的执行中，在吸入温度比设定温度低时，或至少太阳辐射的量时的遥控器（30）的下降趋势的情况下，并结束操作停止控制的执行。

Remote Controller (30), from the start of heating operation, the judgment time required until the time of performing a predetermined determination process has passed, based on the suction temperature of the indoor unit (20), the outdoor unit (10) is a compressor comprising operating capacity reduction control to reduce the operating capacity of, or to determine the execution necessity of the operation stop control to stop the operation of the compressor. Remote Controller (30) during execution of the operating capacity reduction control, if the suction temperature is equal to or higher than the set temperature, or when the solar radiation amount to be measured by at least sunlight sensor (40) is in a downward trend, operating capacity to end the execution of the reduction control. Further, the remote controller (30) during execution of the operation stop control, when the suction temperature is lower than the set temperature, or at least the amount of solar radiation is the case in the downward trend, and ends the execution of the operation stop control.