42
Maintenance and cleaning
11
Maintenance and cleaning
The product does not require any maintenance.
Enlist the help of an expert to carry out any main-
tenance or repairs.
Clean the device using a soft, lint-free cloth that
is clean and dry. You may dampen the cloth a lit-
tle with lukewarm water in order to remove more
stubborn marks. Make sure that no moisture will
ingress into the housing. Do not use any deter-
gents containing solvents, as they could corrode
the plastic housing and label.
The mains voltage must be disconnected before
the device is removed (trip the miniature cir-
cuit-breaker). Only qualified electricians (to VDE
0100) are permitted to carry out work on the
230 V mains.
12
General information about radio
operation
Radio transmission is performed on a non-exclusive
transmission path, which means that there is a possibil-
ity of interference occurring. Interference can also be
caused by switching operations, electrical motors or de-
fective electrical devices.
Summary of Contents for HmIP-BBL-2
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