72
3061344_201509
Troubleshooting
All faults will be displayed as a fault code by Wolf controllers with eBUS capability. To these faults, cause and remedy may be allo-
cated by means of 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
TBV Excess temperature The flow temperature has exceeded the limit for
TBV shutdown.
Heat exchanger severely contaminated.
Check system pressure/heatingcircuit
pump. Check the HC pump step switch.
Vent the heating system. Press the reset
button.
4
No flame is established
No flame established during the burner start.
Check the gas supply pipe and open the
gas shut-off valve, if necessary. Check
the ignition electrode and cable. Press the
reset button.
5
Flame failure during
operation
Flame failure within 15 s after flame recognition.
Check CO
2
values.
Check ionisation electrode and cable.
Press the reset button.
6
TW excess temperature
The flow/return temperature has exceeded the limit
for TW shutdown.
Check system pressure.
Vent the heating system.
Set the pump to stage 2 or 3.
7
TBA excess temp.
The flue gas temperature has exceeded the limit for
TBA shutdown.
Check for correct installation of combustion
chamber pot.
11 Flame pretence
A flame is recognised before the burner starts.
Press the reset button.
12 Flow sensor faulty
Flow temperature sensor or lead faulty.
Check lead.
Check the flow sensor.
14 Cylinder sensor faulty
DHW temperature sensor or lead faulty.
Check sensor and lead.
15 Outside temp.
Outside temperature sensor or lead faulty.
Check lead.
Check the outside temperature sensor.
16 Return sensor faulty
Return temperature sensor or lead faulty.
Check lead.
Replace the return sensor.
20 Gas valve „1“ fault
A flame is recognised 15 s after burner operation,
even if gas valve 1 has received a shutdown com-
mand.
Replace the gas combination valve.
21 Gas valve „2“ fault
A flame is recognised 15 s after burner operation, even
if gas valve 2 has received a shutdown command.
Replace the gas combination valve.
24 Gas fan fault
The gas fan does not reach the required pre-purging
speed.
Check the gas fan supply cable and gas
fan. Press the reset button.
25 Gas fan fault
The gas fan does not reach the ignition speed.
Check the gas fan supply cable and gas
fan. Press the reset button.
26 Gas fan fault
The gas fan does not stop.
Check the gas fan supply cable and the
gas fan. Press the reset button.
30 CRC fault gas fired
The EEPROM record „Gas fired condensing boiler“ is Switch the power supply OFF and ON; if
unsuccessful, replace the control PCB.
31 CRC fault burner
The EEPROM record „Boiler“ is invalid.
Switch the power supply OFF and ON; if
unsuccessful, replace the control PCB.
32 Fault in the 24 VAC
supply
24 V AC supply outside the permissible range
(e.g. short circuit).
Check the three-way valve.
Check the gas fan.
33 CRC defaul values fault
The EEPROM record „Master reset“ is invalid.
Replace the control PCB.
34 CRC fault, BCC
Faulty boiler coding card
Replace parameter plug
35 BBC missing
Boiler coding card was removed
Korrekten Parameterstecker wieder auf-
stecken
36 CRC fault, BCC
Faulty boiler coding card
Replace parameter plug
37 Incorrect BCC
The boiler coding card is incompatible with the
control unit PCB
Refit the correct parameter plug
38 BCC no. invalid
Faulty boiler coding card
Replace parameter plug
39 BCC system error
Faulty boiler coding card
Replace parameter plug
41 Flow monitoring
Return temperature > flow + 25 K.
Vent the heating system, check the system
pressure.Check the heating circuit pump.
50 Activation of boiler coding
card
The parameter plug must still be enabled
Press reset 2x
52 Activation of boiler coding
card
The parameter plug must still be enabled
Press reset 2x
60 Ionisation current
fluctuates
The siphon or the flue gas system is blocked
severe storm.
Clean siphon, check the flue gas system,
Check ventilation air, check monitoring
electrode.
61 Ionisation current
drops
Poor gas quality, monitoring electrode faulty, severe
storm.
Check monitoring electrode and lead.
LED constantly red
Ionisation lead shorted out or
Ionisation electrode earthed (housing).
Check the ionisation lead and position of
electrode to burner.
Press the reset button.