Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 83

2-yearly maintenance of fuel cell module
A D
B C E F
Fig. 79
01. Turn off the ON/OFF switch on the fuel cell mod-
ule (see page 58) and secure against it being
turned back on.
02. Remove the cover panel (see page 64).
03. Pull off four clips and undo screw
A
04. Remove trap
C .
05. Release both clips
D
06. Undo both screws
E
filter element .
F
07. Release both clips
G
Resetting the service indicator on the fuel cell module
Note
If "bAD" appears on the display, the service indicator
cannot be reset. This may be because the mainte-
nance interval had not yet been reached, for example.
In such a case, inform Viessmann Technical Services.
1. Turn on the ON/OFF switch on the fuel cell mod-
ule.
Filling with distilled water
01. Prepare to fill with distilled water (see page 69).
02. Select "11" using / .
G
K H
.
B
and remove the hoses.
and remove distilled water
and remove the air ducts.
Commissioning, inspection, maintenance
(cont.)
08. Undo the screw and remove metal clamp
09. Remove air filter .
K
10. Fit new air filter and secure with metal clamp
K
and screw.
H
11. Reattach the air ducts with clips
12. Fit new distilled water filter element
with the two screws.
13. Reattach the hoses with two clips
14. Refit trap with clips
C
2. Select "33" using / .
3. Simultaneously press SET and .
"34" will appear on the display.
4. Press and hold SET for at least 3 s.
"_CL" will appear on the display. The service indi-
cator has been reset.
.
H
.
G
and secure
F
.
D
and screw .
A B
83