Viessmann VITODENS 300 Service Instructions Manual page 12
Wall mounted gas fired condensing boiler. natural gas and lpg version. 4.2 to 13.0 kw
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Also See for VITODENS 300:
- Service instructions manual (132 pages) ,
- Datasheet (41 pages) ,
- Installation instructions manual (20 pages)
Table of Contents
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Initial start-up, inspection, maintenance
Further details regarding the individual steps
Yes
Ignition
Yes
Gas combination
valve opens
Yes
Ionisation cur-
rent builds
(higher than
5 µA)
Symbol A
Yes
Burner in opera-
tion
Yes
Automatic cali-
bration of the
combustion con-
trol unit
12
Fault
No
F4
Fault
No
F4
Fault
No
F4
Stops below set
boiler water tem-
perature and re-
starts
Fault
No
EB
(cont.)
Check ignition
module (control
voltage 230 V
across plugs
"X2.1" and "X2.2"
Check the gas
combination valve
(control voltage
230 V); check the
gas supply pres-
sure
Check the ionisa-
tion current,
check the elec-
trode adjustment
and the gas pipe
for airlocks.
Check flue gas
system for sound-
ness (flue gas re-
circulation),
check gas flow
pressure
Check the electri-
cal connecting
cable and the io-
nisation electrode
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