Command Not Confirmed; Duty Cycle Exceeded; Behaviour After Power Recovery - HomeMatic HM-RC-2-PBU-FM Installations- Und Bedienungsanleitung

Device LED feedback

9.2 Command not confirmed

If a receiver (at least one in cases where multiple devic-
es have been taught-in) does not confirm a command,
the device LED lights up red at the end of the trans-
mission process. This behaviour may be caused by the
following:
• The receiver cannot be accessed.
• The receiver is unable to execute the command
(load failure, mechanical blockade, etc.).
• The receiver is defective.

9.3 Duty cycle exceeded

The duty cycle is a legally regulated limit of the trans-
mission time of devices in the 868 MHz range. The aim
of this regulation is to safeguard the operation of all de-
vices 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 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-
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in processes mean that it may be reached in isolated
instances during start-up or initial installation of a sys-
tem. If the duty cycle is exceeded, this is indicated by
one long and one short red flash of the device LED, and
may manifest itself in the device temporarily working in-
correctly. The device starts working correctly again after
a short period (max. 1 hour).

10 Behaviour after power recovery

When the operating voltage is switched on (recov-
ery of mains voltage), the remote control checks its
components. If the test is completed without errors, the
remote control transmits a wireless telegram contain-
ing its status information. The LED will flash if an error
is detected during this check. This is repeated continu-
ously and the device does not perform its function.
To prevent all devices transmitting at the same time
when power is recovered, there is a random delay be-
fore the device transmits. During this time, the device
LED flashes (as in teach-in mode). If the delay is very
short, this flashing may be almost imperceptible.
Behaviour after power recovery
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