Display fault
code
System char-
acteristics
Cause
Remedy
F2
Burner in fault
state
Temperature limit-
er has responded.
Check the heating sys-
tem water level. Check
the circulation pump.
Vent the heating system.
Check the temperature
limiter and leads.
Press"Reset".
F3
Burner in fault
state
The flame signal is
already present at
burner start.
Check the ionisation
electrode and leads.
Press"Reset".
F4
Burner in fault
state
No flame signal is
present.
Check the ionisation
electrode and leads,
measure the ionisation
current, check the gas
pressure, check the gas
combination valve, igni-
tion, ignition module and
condensate drain.
Press"Reset".
F5
Burner
blocked
Air pressure
switch faulty
Check the air pressure
switch and the intercon-
necting cable.
F7
Burner
blocked
Faulty water pres-
sure sensor
Check the water pres-
sure sensor and the in-
terconnecting cable.
F8
Burner in fault
state
Fuel valve closes
too late
Check gas combination
valve. Check both control
paths.
Press"Reset".
F9
Burner in fault
state
Fan speed too low
at burner start
Check the fan, check the
fan cables and supply,
check the fan control.
Press"Reset".
FA
Burner in fault
state
Fan not at stand-
still
Check the fan, check the
fan cables, check the fan
control.
Press"Reset".
Fault finding
(cont.)
72
Troubleshooting
58
62
670
GB
Содержание Vitodens 100
Страница 41: ...Opening the control unit housing Electrical connections 41 Installation 5862 670 GB Installation ...
Страница 82: ...A1 Main PCB A2 Programming unit Connection and wiring diagrams combi boiler 82 Designs 5862 670 GB ...
Страница 84: ...A1 Main PCB A2 Programming unit Connection and wiring diagram system boiler 84 Designs 5862 670 GB ...
Страница 88: ...Parts lists cont 88 Parts lists 5862 670 GB ...
Страница 89: ...Parts lists cont 89 Parts lists 5862 670 GB Service ...
Страница 90: ...Parts lists cont 90 Parts lists 5862 670 GB ...
Страница 91: ...Parts lists cont 91 Parts lists 5862 670 GB Service ...
Страница 95: ...95 5862 670 GB ...