18/19
P100015830 B
TRA 410, 421
Troubleshooting
9
Troubleshooting
Fault/display
Possible cause
Action
To be per-
formed by
Measured
temperature
from internal or
external sensor
outside meas-
uring range
Internal sensor/room sensor
f
Remove external heat sources
in the immediate vicinity until the
sensor has cooled down.
f
Reposition the room sensor if
necessary.
f
Check the room thermostat/
external room sensor and replace
if necessary.
f
Check the connection of the
external sensor.
Qualified per-
sonnel
No signal from
external sensor
f
No external sensor present.
f
External sensor does not
correspond to specifications.
f
Deactivate the external sensor in
parameter setting 040.
f
Check the external sensor and
replace if necessary.
Qualified per-
sonnel
Fault in internal
sensor
f
Set to factory settings in the
“Settings” menu.
f
If the room thermostat is faulty it
must be replaced.
O p e r a t i n g
company
10 Disposal
The local, currently valid laws must be observed when disposing of the device. You
will find more information on the materials and substances in the Declaration on
materials and the environment for this product.
11 Cleaning
Use a dry, solvent-free, soft cloth to clean the room thermostat. Make sure that no
setting has been changed during the cleaning.
