Mains supply failure
The heater switches off in the event of a mains supply failure and the upper bar of the
display flashes. The device resumes its previous operation if the mains voltage is restored within
approx. 1 to 1 ½ days. If the mains supply failure is longer, the time and weekday must be reset and
the 'E' user program may have to be re-entered. The set-back temperature must also be
reprogrammed if this was altered.
Short-circuit or interruption in the sensor line:
The heating system is disconnected and the LED
flashes.
CAUTION:
In the event of a fault, the mains voltage may still be present on the sensor line
Special master controllers for connecting satellites
All controllers listed can be supplied as master controllers for connecting satellites. The TA output can
be used to connect virtually any number of clockless temperature controllers, e.g. commercially
available bimetal controllers with their L set-back input TA as satellites. If the master controller with its
timer switches to set-back operation, all satellites do the same.
Troubleshooting
Diagnosis
Possible cause
Solution
No display visible
Heating system not switched on
Heating system does not switch
on, the entire display flashes
Heating system does not switch
on, LED flashes
Device is not working correctly
Mains voltage not connected
Device possibly on setback mode or
floor monitor has responded
Mains supply failure
Floor temperature sensor faulty
Device fault caused by lightning or
overvoltage
Switch on mains voltage
Check setback mode or wait until
the floor has cooled down
Check mains voltage
Replace floor temperature sensor
Press Reset button, reset the
device
Your personal 'E' user program
Mon ... Fri
Sat, Sun
No. E
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