To program or re-program your Optex RC10U or RC20U chime please follow the below instructions:

1. To access the program mode press and hold switch one until Green
LED flashes.
2. Select the zone number by pressing switch two until desired zone LED
is flashing. All 3 zones indicate zone 4 is ready to be programmed.
3. Activate the TD-10 Transmitter that will be assigned to the selected
zone. A programmed zone will display a solid LED.
4. Repeat steps two and three for additional transmitters. (Maximum of 4)
5. Press switch 2 until the green LED is on. This will exit you from the