38
Behaviour after power recovery
9
Behaviour after power recovery
After the device has been inserted to a socket or after power recovery the
switch actuator performs a self-test/restart (approx. 2 seconds). The de-
vice LED flashes red, green and orange briefly (LED test display).
The
device LED will flash if an error is detected during this check (see sec. „8.1
Flash codes“ on page 36). This is repeated continuously and the device
does not perform its function.
If the test is completed without errors, the switch actuator transmits a wire-
less telegram containing its status information. To prevent all HomeMatic
actuators from transmitting at the same time when power is recovered (af-
ter a mains power failure or a disconnection, for example), there is a ran-
dom delay before the switch actuator transmits. During this time, the device
LED slowly flashes orange. If the delay is very short, this flashing may be
almost imperceptible.
10 Maintenance and cleaning
The product does not require any maintenance. Enlist the help of an ex-
pert to carry out any repairs. Clean the product using a soft, lint-free cloth
that is clean and dry. You may dampen the cloth a little with lukewarm
water in order to remove more stubborn marks. Do not use any deter-
gents containing solvents, as they could corrode the plastic housing and
label.
11 General information about radio
operation
Radio transmission is performed on a non-exclusive transmission path,
which means that there is a possibility of interference occurring. Interfer-
ence can also be caused by switching operations, electrical motors or
defective electrical devices.
