Loss of Pairing
The condition where a transmitter and receiver that previously worked together no longer recognise each other. The symptom is clear: when a transmitter button is pressed no relay pulls in at the receiver, yet the receiver supply and transmitter power are normal. The cause is most often a change in memory contents or an accidentally entered teach-in procedure.
Loss of pairing is easy to distinguish from a range or interference problem: with interference the response is intermittent, whereas with loss of pairing it is completely absent and reducing the distance changes nothing. If there is still no response when you bring the transmitter to within a metre of the receiver, the problem is not in the radio link but in recognition.
Order of elimination:
- Measure the receiver supply; if there is no supply the problem is power, not pairing.
- Check the transmitter's indicator behaviour; if the transmitter is not transmitting at all, the battery or a button may be faulty.
- Test right next to the receiver; a lack of response independent of distance points to loss of pairing.
- Re-teach the unit by applying the teach-in procedure in the user manual.
Before re-teaching, leave the machine's power circuit de-energised; an unexpected output may be triggered during teach-in. After teaching, verify each channel in turn with no load and confirm that the direction mapping has not changed. If more than one transmitter is registered on the same receiver, also confirm from the manual whether the teach-in operation affects the other records.
Context in which this term is used: Receiver-transmitter pairing procedure