If the power is cut off at the start of cooking and indication lights are lit orange, but the power is restore after pressing OK-button, the automatic child lock is active. The solution is to swich automatic child lock off if it is not in use intentionally.
The Safera Siro has automatic child lock feature built in and it can be swiched on and off by pressing the lock-button for 5 second. To turn the automatic child lock on press the lock button for 5 seconds until you hear two high beeps and the sensor unit indiction lights turn on orange. To turn the automatic child lock off, press the lock-button for 5 seconds until you hear one low beep and the sensor unit indication lights turn off.