Troubleshooting - Wolf COB Installation Instructions And Technical Manual

Any faults will be displayed as fault code by Wolf control accessories with eBUS capability. The cause and remedy for a fault can
be established using the following table. This table is designed to allow your local heating contractor to trace the fault more easily.
Fault Fault
code
1 Excess temperature
(high limit safety
cut-out)
4 No flame
established
5 Flame failure during
operation
6 TW excess temperature The flow has exceeded the limit of the
7 Flue gas sensor excess
temperature
8 Flue gas/ventilation air
damper does not move
11 Flame pretence
12 Faulty boiler sensor
14 Faulty cylinder sensor
SF
15 Faulty outside
temperature sensor
25 Fan fault
26 Fan fault
27 Faulty stratification
sensor
58

34. Troubleshooting

Cause
The flow temperature has exceeded 110 °C
No flame at burner start
Inspection window for flame monitor/mixer head
contaminated
Faulty flame 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 dirty
Negative pressure at oil pump too high, max.
0.3 bar, flue gas recirculation (flue gas in the
ventilation air)
Boiler dirty
temperature limiter (100 °C)
The flue gas temperature has exceeded 120 °C
Flue gas/ventilation 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
The fan does not reach the set speed
Boiler dirty
The fan does not stop
Faulty stratification cylinder sensor or lead
Remedy
Test heating circuit pump, vent system,
press reset, clean heat exchanger
Check oil line, if necessary check fuel
level, check ignition electrode and
ignition transformer, press reset
Check inspection window for flame
monitor/mixer head
Check flame monitor and lead
Siphon backpressure
Check free condensate drainage
Maintenance necessary
Check CO values, check flame monitor
2
and lead, press reset, check flue system
for leaks
Maintenance necessary
Vent the system, check the heating
circuit pump
Clean heat exchanger, check whether
all displacement devices are installed
Check the flow through the boiler
Check boiler flow / boiler return
press reset
Check flue gas/ventilation air damper
and wiring
Press the reset
Check solenoid valve for oil pump
Check sensor and lead
Check sensor and lead
Check sensor and lead
Check power cable to fan and check
fan;
Check that the condensate can drain off
freely from the balanced flue system
press reset
Maintenance necessary
Check power cable to fan and check
fan; press reset
Check sensor and lead
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