Скачать или смотреть Honeywell CM727 - Connection problem

After the power failure, the automatic boiler started again. However, it is not possible to pair the CM727 thermostat with the communication unit. Before that, communication worked normally. Now I'm doing everything according to the pairing instructions ... I've tried about 20 times with different distance spacing in different steps etc. But I always end up at the same point where the comm box flashes like it should ... the thermostat says "InST CO" like it should ... but after confirming "OK" nothing happens for either device. The OK button is functional - tested outside pairing mode. In the video you can see the exact process I did and it always ends up the same.