9
7 Replacing batteries
If the symbol for low batteries
( )
appear in the display or in the app, replace
with two new LR03/micro/AAA batteries.
Once the batteries have been inserted, the thermostat will perform a self-
test/restart. The LED will indicate that initialisation is complete by lighting up
orange and then green.
Caution! There is a risk of explosion if the battery is not replaced
correctly. Replace only with the same or equivalent type. Never
recharge non-rechargeable 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! Take them to your local battery disposal point.
8 Troubleshooting
Provided there is enough voltage, the thermostat will still operate. Depending
on the load, it may still be possible to send commands.
If the voltage drops too far during a command, the low battery symbol
( )
and error code will be displayed on the device (see section 8.4). In this
instance, the batteries must be replaced.
8.1 Low batteries
If at least one device does not accept a command, the LED
(B)
will light
up red. This may be caused by radio interference (see section 11). Other
possible issues may be:
The duty cycle is a legally regulated limit of the transmission 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.
Warmup devices are designed and produced with 100% conformity to this
regulation. During normal operation, the duty cycle is not usually reached.
However, intensively repeated device pairing processes may mean that this
limit is reached in isolated instances during commissioning.
IMPORTANT:
If the duty cycle limit is exceeded, the device may stop working
for a brief period. The device will start working normally again after a short
period (max. 1 hour).
8.2 Command not confirmed
8.3 Duty cycle
•
Device cannot be reached.
•
Device is unable to execute the command (load failure, mechanical
block, etc.).
•
Device is defective.
