Operating mode "Add. heat only"
In the event of malfunctions that cause a low indoor tem-
perature, you can normally activate "Add. heat only" in
HM 8-12 SPLIT, which means that heating only occurs with
the immersion heater.
Activate the mode by holding in the operating mode
button for 7 seconds.
Note that this is only a temporary solution, as heating with
the immersion heater does not make any savings.
Deactivate the function by pressing the "Operating mode"
button for 7 seconds once again.
Emergency mode
Emergency mode is activated by setting the switch to
” ". It is used when the control system and, thereby,
operating mode "Add. heat only" does not function as it
should. Emergency mode is activated by setting switch
(SF1) to ” ”.
The following applies in emergency mode:
■
The front panel is not lit and the control computer in
HM 8-12 SPLIT is not connected.
■
A power step of 4 kW is connected. The immersion
heater is controlled by a separate thermostat (BT30).
■
The automatic heating control system is not operational,
so manual shunt operation is required. Call installer.
17SPLIT
For Home Owners
Dealing with comfort disruption
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