Sequence Of Operation And Potential Faults During Each Start-Up Cycle - Viessmann VITODENS 200-W B2HA 150 Service Instructions Manual

Vitodens 200-W B2HA 112, 150, 399, 530 Service

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

Call for heat by control
yes
Fan starts up
yes
Ignition
yes
Gas combination valve opens
yes
Ionization current builds
Symbol A
yes
Burner in operation
yes
Automatic calibration of
the combustion controller
For further details regarding faults, see page 72.
Display message
no
After approx.
no
51 s fault F9
Fault EE
no
Fault EE
no
Fault EE
no
no Stops below
the set boiler
water
temperature
and restarts
immediately
Fault E3
no
Fault EB
Start-up and 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 120V across
plugs "X2.1" and "X2.2")
Fault EE Check the gas train
(control voltage 120V); 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.
19