• The Parent Unit may have lost connection with the Baby Unit. Reduce the distance between them.
• The Baby Unit may be switched off. Make sure the mains power adapter is properly connected and the ON/OFF switch is in the ON position, so the POWER LED is lit.
• The battery pack in the Parent Unit is running low. Connect the Parent Unit to the mains power with the supplied power adapter for recharging.
• The alarm is sounding. Press any button to stop the alarm, or wait for 60 seconds for it to stop automatically.