Wolf COB-2 Operation Instructions Manual page 66

Fault
Fault Message
code
4 No flame
5 Flame failure
6 Temperature limiter,
excess temperature
7 Flue gas sensor,
excess temperature
8 Flue gas/supply air
damper does not
respond
11 False flame
12 Boiler sensor faulty
13 Flue gas sensor faulty – Faulty flue gas sensor or lead.
14 Faulty cylinder sensor
CS
15 Outside temperature
sensor fault
22 Differential pressure
sensor not responding
23 Differential
pressure sensor not
deactivating
66 | WOLF GmbH
Cause
– When the burner starts, no flame
forms by the end of safety time.
– Ignition electrodes contaminated.
– Air in the oil feed line.
– Heat generator contaminated.
– Flame failure during operation.
– Flue gas return system (flue gas
in the supply air).
– Air in the oil feed line.
– Heat generator contaminated.
– The flow has exceeded the limit of
the temperature limiter (95°C).
– The flue gas temperature has
exceeded 120°C.
– Flue gas/supply air damper
contact (E1) fails to close or open
when there is a demand.
– A flame is recognised before the
burner starts.
– Faulty boiler sensor or lead.
– Faulty cylinder sensor or lead.
– Faulty outside temperature sensor
or lead.
– Supply air or flue gas path
blocked.
– Differential pressure too low in
pre-purge phase.
– Differential pressure sensor or
cable defective.
– Air ducts not connected or
incorrectly connected.
– Differential pressure sensor fails
to switch back.
– Infiltrating air flowing through the
heat generator.
Remedy
► Check oil line, check oil level,
if necessary.
► Check ignition electrodes and
ignition transformer.
► Check solenoid valve for oil
pump.
► Check that the condensate
can drain off freely.
► Press reset button.
► Check CO values.
2
► Service the equipment.
► Check flue system for leaks.
► Check oil line, check oil level,
if necessary.
► Press reset button.
► Check CO values.
2
► Service the equipment.
► Vent the system.
► Check the heating circuit
pump.
► Clean the heating water heat
exchanger.
► Check that all displacement
devices are properly installed.
► Check the flow through the
heat generator.
► Check that the heating flow
and return are connected
correctly.
► Press reset button.
► Check wiring of flue gas/supply
air damper.
► Check solenoid valve for oil
pump.
► Check ignition electrodes and
ignition transformer.
► Press reset button.
► Check sensor.
► Check lead.
► Check sensor.
► Check lead.
► Check sensor.
► Check lead.
► Check sensor.
► Check lead.
► Check supply air and flue gas
path.
► Check differential pressure
sensor.
► Check lead.
► Check air ducts.
► Check differential pressure
sensor.
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