Roth BW/H Komfort, Installation Manual

Page: 65 / 172

BW/H Komfort
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Message“!Sensor cable open“ / „!Sensor cable short-c.“
Control lamp flashes Message“?Nocturnal circulation“
If the collector temperature between 11
p.m. and 5.00 a.m. is higher than 40 °C
or the present temperature difference is
higher than the switch-on temperature
difference, this can indicate a heat return
current (e.g. due to defect of non-return-
valve).
This message is to be seen as warning and
it should always be considered in relation
to the outdoor temperature.
3. Messages:
If a malfunction occurs, a message is given on the display of
the controller:
Indication of a broken or hot-wired cable
with indication of the concerned sensor.
Message „!
∆
T too high"
A store has been loaded for a period of
at least 20 minutes with a
∆
T of 50 K.
Possible reasons are a defect pump, defect
valve or a calcified heat exchanger.
Message „!EEPROM“
Indicated as malfunction during memory
access. In this case, the controller is swit-
ched-off for a while and then switched-on
again (please check all adjustments).
If the fault can be removed in this way,
it has been a matter of data communi-
cation. But if the fault is still present, the
controller should be returned to the
manufacturer.
Message „!RTC“:
Indicates a malfunction of the real-time-
clock of the controller. Please switch-off
the controller for a while and then switch
it on again (please check the set time). If
the fault is still present, all temporally con-
trolled functions and options are distur-
bed. Emergency operation of the system
is guaranteed, but the controller should be
returned to the manufacturer.
B