PURPOSE: To provide a cleaning unit operation control device which can cool the inside of a storehouse at a proper temperature without over cooling and undercooling the inside of the storehouse even if a temperature sensor therein is broken down.

CONSTITUTION: A cleaning unit operation control device is composed of an inside unit 2 provided in a storehouse like a prefab and an outside unit 4 provided outside the storehouse, having a compresser 12. And a storehouse temperature sensor 8 for controlling the temperature of the inside of the storehouse and a defrosting reset temperature sensor 9 for performing the defrosting are provided in the inside unit 2. Moreover, a control means for operating the compresser 12 on the basis of the detected temperature of the defrosting reset temperature sensor 9 when the storehouse temperature sensor 8 is broken down is provided.