Fault code
on the dis-
play
System character-
istics
Cause
Measures
EA
Burner in a fault
state
The ionisation
current lies out-
side the permissi-
ble range during
calibration
Check the ionisation
electrode and cable.
Press "
E
RESET".
Eb
Burner in a fault
state
Heat draw-off re-
peatedly too low
during calibration
Initiate heat draw-off
and trigger manual cali-
bration (see page 112)
Press "
E
RESET".
EC
Burner in a fault
state
The ionisation
current lies out-
side the permissi-
ble range during
calibration
Check the ionisation
electrode and cable.
Press "
E
RESET".
Ed
Burner in a fault
state
Internal fault
Replace the control unit.
F0
Burner blocked
Internal fault
Replace the control unit.
F1
Burner in a fault
state
Flue gas tem-
perature limiter
has responded.
Check the heating sys-
tem water level. Vent the
system.
Press "
E
RESET" after
the flue gas system has
cooled down.
F2
Burner in a fault
state
The temperature
limiter has re-
sponded.
Check the heating sys-
tem water level. Check
the circulation pump.
Vent the system. Check
the temperature limiter
and connecting cables.
Press "
E
RESET".
F3
Burner in a fault
state
Flame signal is al-
ready present at
burner start.
Check the ionisation
electrode and connect-
ing cable.
Press "
E
RESET".
Fault codes
(cont.)
97
Troubleshooting
5592
883
GB
Service
Summary of Contents for VITODENS 343-F WS4A
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