Wolf COB - Troubleshooting

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3062547_201802
39 Troubleshooting
Any faults will be displayed as fault codes by Wolf controllers with eBUS capability. Cause and remedy may be allocated to these
faults using the following table . This table is designed to allow your local heating contractor to trace the fault more easily.
Fault
code
Fault Cause Remedy
1 HLSC excess temp. The ow temperature has exceeded 110 °C Test heating circuit pump,
vent system press reset button,
clean heat exchanger
4 None
ame established
No ame at burner start
Inspection window for ame monitor/mixer head
contaminated
Faulty ame monitor
Air in oil line
Negative pressure at oil pump too high,
max. 0.3 bar
Overpressure at oil pump too high, max. 0.5 bar
Boiler contaminated
Check oil line,
if necessary check fuel level,
check ignition electrode and ignition
transformer,
press reset
Check inspection window for ame
monitor/mixer head
Check ame monitor and lead
Check that the condensate can drain
off freely
Service required
5 Flame failure during
operation
Negative pressure on the oil pump is too high,
max. 0.3 bar ue gas return system (ue gas in
the supply air)
Boiler contaminated
Check CO
2
values,
check ame monitor and lead,
press reset, check ue system for
leaks, service required
6 Temperature limiter -
excess temperature
The ow has exceeded the limit of the
temperature limiter (100 °C)
Vent the system,
check the heating circuit pump
7 Flue gas sensor, excess
temperature
The ue gas temperature
has exceeded 120 °C
Clean the heat exchanger,
Check whether all displacement
devices are installed,
check the ow through the boiler
Check if ow and return are properly
connected
Press reset button.
8 Flue gas/supply air
damper does not
respond
Flue gas/ventilation air damper contact (E1)
fails to close or open when there is a demand
Check ue gas/ventilation air damper
and wiring
11 External light
recognition
A ame is recognised before the burner starts Press reset
Check oil pump solenoid valve
12 Boiler sensor faulty Faulty boiler sensor or lead Check sensor
and lead
14 Faulty cylinder sensor
SF
Faulty cylinder sensor or lead Check sensor
and lead
15 Outside temperature
sensor faulty
Faulty outside temperature sensor or lead Check sensor and lead
25 Fan fault The fan does not reach the set speed
Boiler contaminated
Check supply to the fan
Check fan
Check that the condensate can drain
off freely
Check balanced ue system press reset
Service required
26 Fan fault The fan does not stop Check power cable to fan
Check fan Press reset
27 Faulty stratication
sensor
Faulty stratication cylinder sensor or lead Check sensor and lead