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Troubleshooting
Diagnostics
(continued)
Fault codes
(continued)
Fault code on display
E8
E9
EA
Eb
EE
EF
EC
Ed
F0
F1
58
*1
System behavior
Burner in fault mode
Burner in fault mode
Burner in fault mode
Burner blocked
Burner in fault mode
Burner in fault mode
Burner in fault mode
Burner in fault mode
Burner blocked
Burner in fault mode
Cause
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).
Corrective action
Check the ionization electrode and
cable. Press "
RESET".
Check the ionization electrode and
cable. Check venting system for
leaks. Press "
RESET".
Check the ionization electrode and
cable.
Press "
RESET".
- 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 "
RESET".
Check the ionization electrode and
cable.
Check gas supply, condensate drain,
ignition and ignition module
Press "
RESET".
Check gas supply, check flue gas/
exhaust pipe/air intake for flue gas
recirculation, check ionization
electrode (replace if necessary)
Press "
RESET".
Check the ionization electrode and
cable. Press "
RESET".
Replace the control unit.
Replace the control unit.
Check heating system fill
level. Bleed air from system.
Press "
RESET" after vent system
has cooled down.
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