operation manual

Troubleshooting

8.3 Activation of alarm mode not possible

When activating the alarm mode of your Homematic IP

security components, you will be informed about the de-

vice LED if activation was not possible due to a missing

Internet connection or unsafe status of a sensor (see „8.5

Error codes and ﬂashing sequences“ on page 36). The

following unsafe conditions can occur:

• Window open

• Battery empty

• Sabotage contact triggered

• Conﬁguration data ready for transmission

• Duty cycle limit reached

8.4 Duty cycle

The duty cycle is a legally regulated limit of the transmis-

sion time of devices in the 868 MHz range. The aim of

this regulation is to safeguard the operation of all devices

working in the 868 MHz range.

In the 868 MHz frequency range we use, the maximum

transmission time of any device is 1% of an hour (i.e. 36

seconds in an hour). Devices must cease transmission

when they reach the 1% limit until this time restriction

comes to an end. Homematic IP devices are designed

and produced with 100% conformity to this regulation.

During normal operation, the duty cycle is not usually

reached. However, repeated and radio-intensive teach-

in processes mean that it may be reached in isolated in-

stances during start-up or initial installation of a system. If