Repairs - Viessmann VITOLIGNO 300-P Service Instructions Manual

Fault display
(cont.)
Displayed System characteris-
fault code tics
FA Control mode
FB Burner blocked
FC Burner blocked

Repairs

Fuses (for installation position, see the connection and wiring
diagram)
F1:
■ 6.3 A (slow), 250 V
■ Breaking capacity H
■ Max. power loss ≤ 2.5 W
■ Appliance fuse
F3:
■ 2.0 A (slow), 250 V
■ Breaking capacity H
Cause
Cleaning motor for
secondary heating
surface faulty
Pellet store empty
Supply system
faulty or blocked.
One of the pellet
sensors in supply
system is faulty.
Vacuum module (if
installed) faulty.
Fuel shortage rec-
ognised (flame
temperature not
achieved).
Lambda probe
failed during oper-
ation.
■ Max. power loss ≤ 2.5 W
■ Pump fuse
F2:
■ 2.0 A (slow), 250 V
■ Breaking capacity H
Troubleshooting
Measures
Check mechanics, drive
and microswitch and
replace if required.
After the fault has been
removed, reset by press-
ing the standby key.
Check pellet supply in pel-
let store or pellet silo.
Check supply system:
depending on the type of
system, check screw con-
veyor and/or vacuum sys-
tem; check pellet sen-
sors.
Check electrical connec-
tions.
Check supply system,
flame temperature sensor
and Lambda probe, refill
pellets if required.
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