31
Troubleshooting
9
Troubleshooting
9.1
Weak battery
Provided that the voltage value permits it, the doorbell
button 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
batteries have been allowed a brief recovery period.
If the battery voltage is too weak, this will be displayed
in the Homematic IP app and directly on the device via
the device LED
(E)
(see “9.4 Error codes and flashing se-
quences” on page 33). In this case, replace the empty
batteries by two new batteries (see “8 Changing battery”
on page 29).
9.2
Command not confirmed
If at least one receiver does not confirm a command, the
device LED
(E)
lights up red at the end of the failed trans-
mission process. The failed transmission may be caused
by radio interference (see “12 General information about
radio operation” on page 37). 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.
Summary of Contents for HmIP-DBB
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