Press the red button on the SwitchBox and the countdown will start normally 30 minutes. When the red button is pressed a signal is sent to the GuardBox. If you want to turn off the cooker then press the red button again - it is as simple as that.
Once the SwitchBox is counting down the signal sent to the GuardBox turns on the electrical supply. Depending on the configuration the oven, hob and grill are turned on. If the red button is pressed again or the time expires the signal is turned off switching off the electrical supply making the oven safe.