Function Sequence And Possible Faults - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Checking the static pressure and supply pressure
Supply pressure (flow pressure)
For natural gas
H E, E+, M
Below 13 mbar Below
(1.3 kPa) 17 mbar
(1.7 kPa)
13 to 33 mbar 17 to 33 mbar
(1.3 to (1.7 to
3.3 kPa) 3.3 kPa)
Above 33 mbar Above
(3.3 kPa) 33 mbar
(3.3 kPa)

Function sequence and possible faults

Control unit issues a heat
demand
Yes
Fan starts
Yes
Ignition
Yes
Gas train opens
Yes
Ionisation current builds
Symbol
A
36
L, LL, S, K Lw
Below Below
18 mbar 16 mbar
(1.8 kPa) (1.6 kPa)
18 to 33 mbar 16 to 33 mbar
(1.8 to (1.6 to
3.3 kPa) 3.3 kPa)
Above Above
33 mbar 33 mbar
(3.3 kPa) (3.3 kPa)
Display
No
No Fan starts 4 times for
approx. 50 s, followed by
fault F9
No Fault 81/EE
No
Fault 80/EE
No
Fault 82/EE
(cont.)
Measures
For LPG
Below Do not commission the boiler.
25 mbar Notify your gas supply utility or
(2.5 kPa) LPG supplier.
25 to Start the boiler.
57.5 mbar
(2.5 to
5.75 kPa)
Above Install a separate gas pressure
57.5 mbar governor upstream of the sys-
(5.75 kPa) tem. Set the pre-charge pres-
sure to 20 mbar (2.0 kPa) for
natural gas and 50 mbar
(5.0 kPa) for LPG. Notify your
gas supply utility or LPG suppli-
er.
Action
Increase set value and en-
sure heat is drawn off.
Check the fan, fan connect-
ing cables, power to the fan
and fan control.
Check ignition module (con-
trol voltage 230 V across
plugs "X2.1" and "X2.2").
Check the gas supply.
Check the gas train (control
voltage 230 V
gas supply pressure.
Check setting for ionisation
electrode.
Purge the gas line.
∼
); check the