HomeMatic HmIP-STH, Инструкция по монтажу и руководство по эксплуатации

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Troubleshooting
7 Troubleshooting
7.1 Weak battery
Provided that the voltage value permits it, the temperature
and humidity sensor will remain ready for operation also
if the battery voltage is low. Depending on the particu-
lar 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
„7.4 Error codes and flashing sequences“ on page 44).
In this case, replace the empty batteries by two new bat-
teries (see „6 Replacing batteries“ on page 40).
7.2 Command not confirmed
If at least one receiver does not confirm a command, the
device LED 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 47). 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.