Duty Cycle; Error Codes And Flashing Sequences - HomeMatic IP HmIP-eTRV-B-2 Installations- Und Bedienungsanleitung

Troubleshooting
9.3

Duty cycle

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. 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 pair
processes mean that it may be reached in isolated instances during start-
up or initial installation of a system. If the duty cycle is exceeded, this is
indicated by one long flash of the device LED (D) , and may manifest itself
in the device temporarily working incorrectly. The device starts working
correctly again after a short period (max. 1 hour).
9.4

Error codes and flashing sequences

Flashing code /
LC display
F1
F2
F3
Battery
symbol ( )
Battery symbol
( ) and ---
50
Meaning
Valve drive sluggish
Actuating range too wide
Adjustment range too small
Battery voltage low
Valve moved to error position*
Solution
Please check whe-
ther the valve pin is
stuck.
Please check the
fastening if the ra-
diator thermostat
Please check whe-
ther the valve pin is
stuck.
Replace the batte-
ries of the device
(see see „8 Repla-
cing batteries" on
page 48).
Replace the batte-
ries of the device
(see see „8 Repla-
cing batteries" on
page 48).