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Behaviour after power recovery
7
Behaviour after power recovery
After the device has been inserted to a socket or after
power recovery the pluggable switch and meter performs
a self-test/restart (approx. 2 seconds). The device LED
flashes orange and green briefly (LED test display). The
LED will flash if an error is detected during this test (see „8.4
Error codes and flashing sequences" on page 38). This is
repeated continuously and the device does not perform its
function. If the test is completed without errors, the plug-
gable switch and meter transmits a wireless telegram con-
taining its status information.
8
Troubleshooting
8.1
Command not confirmed
If at least one receiver does not confirm a command, the
device LED lights up red at the end of the failed trans-
mission process. The failed transmission may be caused
by radio interference (see „11 General information about
radio operation" on page 41). This may be caused be
the following:
•
Receiver cannot be reached
•
Receiver is unable to execute the command (load
failure, mechanical blockade, etc.)
•
Receiver is defective
36
8.2
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
and produced with 100% conformity to this regulation.
During normal operation, the duty cycle is not usually
reached. However, repeated and radio-intensive add pro-
cesses mean that it may be reached in isolated instances
during start-up or initial installation of a system. If the
duty cycle is exceeded, this is indicated by three long
flashes of the device LED, and may manifest itself in the
device temporarily working incorrectly. The device starts
working correctly again after a short period (max. 1 hour).
8.3
Automatic disconnection in case of
overload
If the device is overloaded with load currents gre-
ater than 13 A or with loads with more than 3 kW
power, after a short delay time, this leads to the
device's automatic disconnection. The safety dis-
connection is reported with an error message via
the app or WebUI.
Troubleshooting
37
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