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27
!Please note
Interrupting the external power supply to the fuel
cell module during power generation can result
in fault messages.
Only switch off the system at ON/OFF switch D
on the programming unit of the control unit: See
page 28.
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 module
Do not interrupt the external power supply to the fuel
cell module.
You can turn off power generation by the fuel cell mod-
ule. All functions of the heating circuits remain active.
Heat is generated exclusively by the external heat gen-
erator.
1.
2. "Fuel cell"
3. "Power generation OFF"
4. to confirm
Switch power generation back ON
Select "Ecological", "Economical" or "Energy man-
ager OFF"
Switching off heat generation without frost protection monitoring
Frost protection for the appliance and the heating
water buffer 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 module:
See page 27.
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 28.
4. Close the gas shut-off valve.
!Please note
If outside temperatures of below 3 °C are
expected, take appropriate measures to pro-
tect the system from frost.
If this is the case, please contact your heat-
ing contractor.
Note
As they are not being supplied with power, the circu-
lation pumps and diverter valves may seize up.
If your system has been shut down for a prolonged
period, you may have to reset the "Time" and
"Date": See page 19.
Interrupting the external power supply to the system
Frost protection for the appliance and the heating
water buffer cylinder is not active.
The system is disconnected from the external power
supply. The fuel cell module is turned off.
Power generation is switched off.
Note
If the duration of the interruption of the external power
supply to the system is more than 6 weeks, trouble-
free operation of the fuel cell module can no longer be
guaranteed. If the external power supply to the system
is interrupted for more than 6 weeks, please notify your
heating contractor.
Start-up/shutdown
Switching off the system
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27


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