operation manual

Troubleshooting

Caution! There is a risk of explosion if the battery

is not replaced correctly. Replace only with the

same or equivalent type. Never recharge standard

batteries. Do not throw the batteries into a ﬁre. Do

not expose batteries to excessive heat. Do not

short-circuit batteries. Doing so will present a risk

of explosion.

Used batteries should not be disposed of with

regular domestic waste! Instead, take them to

your local battery disposal point.

8 Troubleshooting

8.1 Weak batteries

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 battery voltage is too weak, this will be displayed

in the Homematic IP app and directly on the device via

the device LED

(B)

(see “8.3 Error codes and ﬂashing se-

quences” on page 36). In this case, replace the empty

batteries by two new batteries (see “7 Replacing batteries”

on page 33).

8.2 Duty cycle

The duty cycle is a legally regulated limit of the transmis-

sion time of devices in the 868 MHz range. The aim of

this regulation is to safeguard the operation of all devices

working in the 868 MHz range.

In the 868 MHz frequency range we use, the maximum

transmission time of any device is 1% of an hour (i.e. 36

seconds in an hour). Devices must cease transmission

when they reach the 1% limit until this time restriction

comes to an end. Homematic IP devices are designed

and produced with 100% conformity to this regulation.

During normal operation, the duty cycle is not usually

reached. However, repeated and radio-intensive teach-

in processes mean that it may be reached in isolated in-

stances during start-up or initial installation of a system.

If the duty cycle is exceeded, this is indicated by one long

red lighting of the device LED (C), and may manifest itself

in the device temporarily working incorrectly. The device

starts working correctly again after a short period (max.

1 hour).