88
Fault code
displayed
Const.
Weather-
comp.
System characteris-
tics
Cause
Measures
EF
X
X
Burner in a fault state Flame is lost imme-
diately after it has
formed (during
safety time).
Check gas supply (gas
pressure and gas flow
switch).
Check balanced flue sys-
tem for flue gas recircula-
tion.
Check ionisation elec-
trode (replace if necessa-
ry):
■
Distance to burner
gauze assembly (see
page 37)
■
Electrode contamination
Press reset button
R
.
F0
X
X
Burner blocked
Internal fault
Replace control unit.
F1
X
X
Burner in a fault state Flue gas tempera-
ture limiter has trig-
gered.
Check heating system fill
level. Vent the system.
Press reset button
R
after
flue system has cooled
down.
F2
X
X
Burner in a fault state Temperature limiter
has triggered.
Check heating system fill
level. Check circulation
pump. Vent the system.
Check temperature limiter
and connecting cables.
Press reset button
R
.
F3
X
X
Burner in a fault state Flame signal is al-
ready present at
burner start.
Check ionisation elec-
trode and connecting ca-
ble.
Press reset button
R
.
F8
X
X
Burner in a fault state Fuel valve closes
too late.
Check gas train. Check
both control paths.
Press reset button
R
.
F9
X
X
Burner in a fault state Fan speed too low
during burner start
Check fan, fan connecting
cables and power supply
to fan; check fan control.
Press reset button
R
.
FA
X
X
Burner in a fault state Fan idle state not
reached
Check fan, fan connecting
cables and fan control.
Press reset button
R
.
FC
X
X
Burner in a fault state Gas train faulty,
faulty modulation
valve control or
flue gas path
blocked
Check gas train. Check
flue system.
Press reset button
R
.
Fd
X
X
Burner in a fault state
and additional fault
b7 is displayed
Boiler coding card
missing
Insert the boiler coding
card.
Press reset button
R
.
Replace control unit if
fault persists.
Troubleshooting
Fault codes
(cont.)
5773 216 GB
Diagnosis
Содержание B2TA
Страница 12: ...12 2 5 1 4 2x 3 Fig 5 Installing the boiler Removing the front panels 5773 216 GB Installation ...
Страница 13: ...13 1 2 SW17 Fig 6 Installing the boiler Siting and levelling the boiler 5773 216 GB Installation ...
Страница 23: ...23 4 1 5 2 2x 3 Fig 16 Installing the boiler Fitting the front panels 5773 216 GB Installation ...
Страница 101: ...101 Parts lists Overview of assemblies 5773 216 GB Components ...
Страница 107: ...107 Parts lists Hydraulics 5773 216 GB Components ...
Страница 118: ...118 0004 0002 0005 0006 0001 0003 Fig 77 Parts lists Miscellaneous 5773 216 GB Components ...
Страница 142: ...142 5773 216 GB ...
Страница 143: ...143 5773 216 GB ...