Instructions

35
Troubleshooting
7 Troubleshooting
7.1 Weak battery
Provided that the voltage value permits it, the contact
interface remains ready for operation even 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 voltage drops too far during transmission, this will be
displayed on the device or via the Homematic IP app (see
Section „7.4 Error codes and flashing sequences“ on page
37). In this case, replace the empty battery with a new
one (see Section „6 Changing the battery“ on page 33).
7.2 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 „10 General information about
radio operation“ on page 39). This may be caused be
the following:
• Receiver cannot be reached.
• Receiver is unable to execute the command (load
failure, mechanical blockade, etc.).
• Receiver is defective.#