Command Not Confirmed; Duty Cycle - HomeMatic basic Anleitung

Troubleshooting
once the batteries have been allowed a brief recovery period.
If the voltage drops too far during transmission, this will be displayed on
the device or via the Homematic IP app (see „8.4 Error codes and flashing
sequences" on page 31). In this case, replace the empty batteries by
two new batteries (s. „7 Replacing batteries" on page 28).
8.2

Command not confirmed

If at least one receiver does not confirm a command, the system LED
(C) lights up red at the end of the failed transmission process. The failed
transmission may be caused by radio interference (see „12 General infor-
mation about radio operation" on page 34). This may be caused be the
following:
• Receiver cannot be reached.
• Receiver is unable to execute the command (load failure, me-
chanical blockade, etc.).
• Receiver is defective.
8.3

Duty cycle

The duty cycle is a legally regulated limit of the transmission time of de-
vices 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. How-
ever, repeated and radio-intensive teach-in processes mean that it may
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