Instruction Manual

48
49
Troubleshooting
Troubleshooting
Alternately
blue and
yellow
flashing
Service message Confirm service
message (can be
switched o via
WebUI)
Alternately
blue and red
flashing
Alarm message Confirm alarm
message (can be
switched o via
WebUI)
If the device LED is not lit, the CCU3 cannot be
started. If the LED does not light up after a minu-
te, restart the system again. If after several att-
empts the system still does not start, please start
the rescue system and install the update again.
8.2 Functional limitations
If the functional limitations or any behaviour that is de-
scribed in the WebUI Manual occur, it may be caused by
the settings of your web browser or additional security
tools that are installed on your PC (e.g. anti-virus software,
firewall or browser-protection add-ons).
In this case, you should include the IP address of your CCU3
into the exception list of your firewall or browser protection
(exceptions are made for the Windows firewall). Furthermo
-
re, you should always call the IP address via the CCU3 (see
„7.2 Starting the WebUI user interface“ on page 39).
8.3 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 de-
vice 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% conform-
ity to this regulation.
During normal operation, the duty cycle is not usually
reached. However, repeated and radio-intensive teach-
in processes mean that it may be reached in isolated in-
stances during start-up or initial installation of a system.
If the duty cycle is exceeded, this is indicated by one long
flashing 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).
8.4 Recovery system
The recovery system is only required if the software of the
Central Control Unit has been damaged. This can hap-
pen, for example, if the power supply is interrupted dur-
ing a software update.
Via the LED (A) it is indicated, that the operating system
of the CCU3 cannot be started any more (see „8.1 Error
codes and flashing sequences“ on page 46). In this