HomeMatic HmIP-WLAN-HAP Mounting Instruction And Operating Manual page 46

Troubleshooting
For further information about operation via the app and
configuration of the Homematic IP system, please refer to
the Homematic IP User Guide (available in the download
area at www.homematic-ip.com).
5 Troubleshooting
5.1 Command not confirmed
If at least one receiver does not confirm a command,
this may be caused by radio interference (see "8 General
information about radio operation" on page 52). The
error will be displayed in the app and may be cause by
the follow:
• Receiver cannot be reached
• Receiver is unable to execute the command (load
failure, mechanical blockade, etc.)
• Receiver is defective
5.2 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
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