Sequence Of Operation And Potential Faults During Each Start-Up Cycle - Viessmann VITODENS 200-W Service Instructions Manual

Start-up and Service

Sequence of Operation and Potential Faults During Each Start-up Cycle

Call for heat by control
Fan starts up
Ignition
Gas combination valve opens
Ionization current builds
Symbol A
Burner in operation
Automatic calibration of
the combustion controller
For further details regarding faults, see page 69.
18
yes
no
yes
no
yes
no
yes
no
yes
no
yes
no
Display message
no
After approx.
51 s fault F9
Fault EE
Fault EE
Fault EE
Stops below
the set boiler
water
temperature
and restarts
immediately
Fault E3
Fault EB
Vitodens 200-W B2HA 19, 28, 35 Service
Measures
Increase set value and ensure
heat is drawn off
Check the fan, fan connecting cables,
power at the fan and fan control
Check the ignition module
(control voltage 120 V across
plugs "X2.1" and "X2.2")
Fault EE Check the gas train
(control voltage 120 V); check
the gas supply pressure
Check the ionization electrode
adjustment and the gas line for airlocks
Check the flue gas system for tightness
(flue gas recirculation), check the gas
flow pressure
Ensure adequate heat transfer.
Press reset button R.
Check gap between ionization electrode
and burner gauze assembly. Check
allocation of gas type (coding address
82, gas train setting). Check flue system;
remedy flue gas recirculation if required.
Press reset button R.