The X-Desk's power supply is equipped with thermal protection circuitry. If the console shuts down after working normally for a while, it may mean that either the working environment is too hot, or that there is a fault, whereby the thermal protection system is overreacting.
You may hear a slight click if the switching off is indeed caused by the power supply's thermal protection.
You will be able to restart the console after a cooling-off period.
Please ensure that you have adequate air circulation around the X-Desk. The ambient operating temperature should be between +5 to +30 deg. C, as indicated in the specifications.
If the ambient temperature is definitely within the normal range but the power supply keeps switching off, contact your SSL dealer or distributor to organize a return.