operation manual

40
Troubleshooting
7 Troubleshooting
7.1 Weak batteries
Provided that the voltage value permits it, the device will
remain ready for operation also if the battery voltage is
low. Depending on the particular load, it may be possible
to send transmissions again repeatedly, once the batter-
ies have been allowed a brief recovery period.
If the voltage drops too far during transmission, this will
be displayed on the device or via the Homematic IP app
(see “7.4 Error codes and flashing sequences” on page
41). In this case, replace the empty batteries by two
new batteries (see “6 Replacing batteries” on page 38).
7.2 Command not confirmed
If at least one receiver does not confirm a command, the
device LED (F) lights up red at the end of the failed trans-
mission process. The failed transmission may be caused
by radio interference (see “10 General information about
radio operation” on page 44). 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.