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Troubleshooting
For the radiator thermostat, use
two 1.5 V LR6/mignon/AA batte-
ries and for the door / window
contact use two 1.5 V LR03/mic-
ro/AAA batteries.
• Close the battery compartment.
• Please pay attention to the flashing
signals of the device LED while in-
serting the batteries
codes and flashing sequences" on
page
38).
Once the batteries have been inserted,
the radiator thermostat will perform
a self-test (approx. 2 seconds). After-
wards, initialisation is carried out. The
LED test display will indicate that in-
itialisation is complete by lighting up
orange and green.
10 Troubleshooting
10.1 Command not confirmed
If at least one receiver does not con-
firm a command, the device LED (D or
L) lights up red at the end of the failed
transmission process. The failed trans-
mission may be caused by radio inter-
ference
(see „13 General information
about radio operation" on page
The failed transmission may also be
caused by the following:
• Receiver cannot be reached.
• Receiver is unable to execute the
command (load failure, mechanical
blockade, etc.).
• Receiver is defective.
(see „10.3 Error
40).
10.2 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 fre-
quency 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. Home-
matic IP devices are designed and pro-
duced with 100 % conformity to this
regulation. During normal operation,
the duty cycle is not usually reached.
However, repeated and radio-intensive
pairing 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 red lighting of
the device LED (D or L) , and may ma-
nifest itself in the device temporarily
working incorrectly. The device starts
working correctly again after a short
period (max. 1 hour).
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