Viessmann VITODENS 200-W WB2B Series Start-Up/Service Instructions page 58

Troubleshooting
Diagnostics
(continued)
Fault codes
(continued)
Fault code on display
E8 Burner in fault mode
E9 Burner in fault mode
EA Burner in fault mode
Eb Burner blocked
EE
Burner in fault mode
EF Burner in fault mode
EC Burner in fault mode
Ed Burner in fault mode
F0 Burner blocked
F1 Burner in fault mode
58
*1
System behavior
The ionization current lies
outside the permissible range
The ionization current lies
outside the permissible range
during calibration
The ionization current lies
outside the permissible range
during calibration
Boiler control initiated a
combustion calibration but
could not complete the
process
At burner start, flame signal
is missing or too weak
Flame is lost immediately
after it has built (during the
safety time)
The ionization current lies
outside the permissible range
during calibration
Internal fault
Internal fault
Maximum flue gas
temperature exceeded
(230ºF / 110ºC)
Cause
Check the ionization electrode and cable.
Press "
Check the ionization electrode and cable.
Check venting system for leaks.
Press "
Check the ionization electrode and cable.
Press "
- Heat generated by boiler must be
removed (boiler is cycling on temperature
limits, before calibration process is
complete)
- Check the connecting cable and the
ionization electrode, check the flue gas
system (flue gas recirculation)
- Verify pump operation
- Switching points of flow switch marginal
(not enough flow)
- Check coding card
- Check gas valve
- Check coding address 82
- Also see address 12:__
Press "
Check the ionization electrode and cable.
Check gas supply, condensate drain,
ignition and ignition module
Press "
Check gas supply, check flue gas/exhaust
pipe/air intake for flue gas recirculation,
check ionization electrode
(replace if necessary)
Press "
Check the ionization electrode and cable.
Press "
Replace the control unit
Replace the control unit
Check heating system fill
level. Bleed air from system.
Press "
cooled down
Corrective action
RESET"
RESET"
RESET"
RESET"
RESET"
RESET"
RESET"
RESET" after vent system has