If you cannot see the Sensor Pad icon on the Parent Unit display this can indicate that the Sensor Pad & Nursery Unit have lost connection
Firstly - bring the Sensor Pad and Nursery Unit closer together and make sure that the Nursery & Parent Units are ON and the battery is inserted in the Sensor Pad to restore the connection.
If there is still no connection after trying the above, then and only then should the following reconnection procedure below be carried out.
IMPORTANT: If you have more than 1 wireless Sensor Pad they must be in separate rooms during the reconnection procedure.
Switch the Nursery and Parent Units OFF
Remove and replace the battery from the Sensor Pad
Switch the Nursery Unit ON
Press and hold the Pause button on the Nursery Unit for 3 seconds
At this point the Sensor Pad indicator Light of the Nursery Unit will flash blue
The reconnection should be completed within 30 seconds
When successful the Nursery Unit will sound a confirmation tone