Viessmann Vitoflame 100 Service Instructions Manual page 21

Burner control unit
t3n Post-ignition time begins with flame
(max. until end of "TSA")
TSA Start-up safety time
Function and fault indications of the signal indicator (LED)
In standard mode, operating conditions are displayed by colour codes through LED
indicator A (see the following table).
The indicator illuminates constant red after a fault shutdown. In this condition, the
optical fault cause display can be activated (see the following chapter "Burner fault
sequence diagram").
LED colours
Flashing yellow
Constant green
Flashing green
Flashing alternately yellow-
red
Constant red
Flashing red
Alternately green-red
Flickering red
(cont.)
1. Press reset button B for approx. 5 s
2. A flashing code will then be dis-
3. To reset the burner and exit the fault
Operating condition
Ignition phase pre-purge, ignition activated
Operation, flame stable
Operation, poor flame stability
Undervoltage (< 195 V)
Fault, burner locked out
Fault indication (for an explanation, see chapter
"Faults with flashing code display"
Extraneous light before burner start
Interface diagnosis
For diagnosis with interface adaptor (accessories)
max. 5 s
max. 5 s
(longer than 3 s).
played.
The number of flashing signals in a
sequence will indicate the type of
fault. For an explanation, see the
table in chapter "Faults with flashing
code display".
display, press the reset button for
approx. 1 s (less than 3 s).
Burner control unit
21