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Troubleshooting
Leaking or damaged batteries can cause burns if they come into
contact with the skin, so use suitable protective gloves in this case.
8
Troubleshooting
8.1
Low battery
Provided that the voltage value permits it, the wall thermostat 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 voltage drops too far during transmission, the empty battery symbol
( ) and the corresponding error code will be displayed on the device (see
see „8.4 Error codes and flashing sequences" on page 39). In this case,
replace the empty batteries by two new batteries (see see „7 Changing
the batteries" on page 37).
8.2
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 transmission process. The failed transmis-
sion may be caused by radio interference (see see „11 General information
about radio operation" on page 41). This may be caused by the follow-
ing:
•
Receiver cannot be reached.
•
Receiver is unable to execute the command (load failure, me-
chanical blockade, etc.).
•
Receiver is faulty.
8.3
Duty cycle
The duty cycle is a legally regulated limit of the transmission time of de-
vices 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
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