Viessmann Vitoladens 300-C Service Instructions Manual page 67

Fault codes
(cont.)
Fault code System characteris-
on the dis- tics
play
F9 Burner in a fault
state
FA Burner in a fault
state
Fb Burner in a fault
state
Fd Burner blocked
FE Burner blocked
FF Burner blocked
Cause
Fan power supply
is interrupted
■ The fire safety
switch or flue gas
thermostat is
faulty or has
responded
■ The jumper
across terminals
1 and 2 in junc-
tion box 201 is
broken or has
been removed
Fan speed devia-
tion
3 x flame blow-off
during operation
Fault, combustion
controller
Internal fault
Internal fault
Troubleshooting
Measures
Check fire safety switch or
smoke thermostat, check
jumper across terminals 1
and 2 in junction box 201
(see page 87).
Press "E".
Check fan, check con-
necting cables to fan.
Press "E".
Check oil supply, check
nozzle.
Press "E".
Press "E" . Replace con-
trol unit if the fault per-
sists.
Check boiler coding card,
restart the equipment.
Replace the control unit if
the equipment will not
restart.
Start the equipment
again. Replace the control
unit if the equipment will
not restart.
67