Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 84

Commissioning, inspection, maintenance
2-yearly maintenance of fuel cell module
03. Press SET. A dot will flash under ITEM (commis-
sioning mode 1 enabled).
11. 01
ITEM STATE
A fault has arisen if "n1", "n2" or "n3" is flashing
under STATE.
For the meaning of fault messages and to correct
faults, see page 70.
04. Select "on" using / .
05. Press SET to confirm.
06. Fill with distilled water (VDE 0510).
Distilled water (5 l) is available as an accessory
(see page 160).
While indicators "01" to "04" are flashing, continue
to fill with distilled water until they switch to con-
stant. The switch from flashing to constant display
will be repeated several times.
The whole process takes about 40 min.
Phase
01
02
03
04
When phase 04 shows constant, add another 0.5 l
of distilled water so that the integral trap is filled.
!
Please note
Escaping flue gas can damage your health.
Ensure that the integral trap is filled with
water.
Note
A fault has occurred during the commissioning
process if the display shows alternately "End" and
"nP".
Turn the ON/OFF switch on the fuel cell module
OFF and then ON again. Then restart commis-
sioning mode 1.
84
Duration
min. approx.
4
15
20
0.5
(cont.)
07. When "05" is displayed under STATE, the filling
process has finished and the start phase will com-
mence.
The starting procedure then continues automati-
cally:
Phase Duration
min. ap-
prox.
05 15
06 to 09 60
10 < 0.5
11 < 0.5
12
–
08. Remove the funnel from the filler neck and secure
it to the front panel with the screw (see page 69).
09. Replace the cover on the distilled water filler neck
and secure it with the screw (see page 69).
10. Check the distilled water filter element and con-
nections for tightness.
11. Reattach the cover panel and programming unit
cover.
Function
Venting
Process start
Process start com-
pleted
Preparation for pow-
er generation
Power generation
(indicators GEN and
GRD illuminate)