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!Please note
Interrupting the external power supply to the fuel
cell module during power generation can result
in fault messages.
For this reason, switch off the system only at the
ON/OFF switch D on the programming unit of
the control unit: See page 49.
If an interruption of the power supply is neces-
sary: See the next chapter. You may have to
notify your contractor.
Switching off power generation by the fuel cell
Do not interrupt the external power supply to the fuel
cell.
You can switch off power generation by the fuel cell. All
functions of the heating circuits remain active. Heat is
generated solely by the gas condensing module.
Tap the following on-screen buttons:
1.
2. "Fuel cell"
3. "Power generation OFF"
4. to confirm
Switch power generation back ON
Select "Ecological", "Economical" or "Energy man-
ager OFF"
Shutting down heat generation with frost protection monitoring ("Standby mode")
For each heating circuit, select the "Standby
mode" operating program and switch off DHW heat-
ing: See page and.
No central heating
No DHW heating
Frost protection for the heat generator and the DHW
cylinder is active.
Power generation by the fuel cell remains switched
on. If no heat is being drawn, power generation is
interrupted.
Note
All circulation pumps connected to the control unit
are automatically started briefly every 24 hours to
prevent them from seizing up.
The diverter valves are switched over at regular
intervals.
Switching off heat generation without frost protection monitoring
No central heating
No DHW heating
Frost protection for the heat generator and the DHW
cylinder is not active.
Power generation will be interrupted. The fuel cell
module remains connected to the external power
supply.
1. Turn OFF power generation by the fuel cell mod-
ule: See page 47.
2. Check the operating status of the fuel cell module.
For this, call up the "Fuel cell" menu in
"Information".
Before interrupting the power supply, ensure the
fuel cell module is in the "No power and heat
generation" operating status.
Note
It takes approx. 1 to 2 hours for the shutdown
phase of the fuel cell module to reach the "No
power and heat generation" operating status.
3. Turn off both ON/OFF switches D and E on the
programming unit: See page 48 49.
Switching on and off
Switching off the system
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47


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