28
Unintentional interruption of external power supply
If the system is disconnected from the external power
supply due to an external fault (power cut, triggering of
a safety device), power generation by the fuel cell
module is interrupted.
If a fault message is displayed after the power supply
has been interrupted, please notify your heating con-
tractor.
When the external power supply is reinstated once the
fault has been rectified, power generation resumes
automatically.
1.
Turn OFF power generation by the fuel cell mod-
ule: 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
F
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 necessary, contact your contractor.
5.
Switch OFF the external power supply.
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 need to reset the
"Time"
and
"Date"
Switching on the system
B
C
D
E
F
G
A
Fig. 4
A
Gas shut-off valve
B
Handle
C
Front panel
D
ON/OFF switch for internal circulation pump and
control unit
E
Export meter
Switching on and off
Switching off the system
(cont.)
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