Troubleshooting - Wolf CGB-11 Installation Instructions Manual

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 Fault
code
1 TBV Excess temperature The flow temperature has exceeded the limit for
4 No flame is established
5 Flame failure during
operation
6 TW excess temperature
7 TBA excess temp.
11 Flame pretence
12 Flow sensor faulty
14 Cylinder sensor faulty
15 Outside temp.
16 Return sensor faulty
20 Gas valve „1" fault
21 Gas valve „2" fault
24 Gas fan fault
25 Gas fan fault
26 Gas fan fault
30 CRC fault gas fired
31 CRC fault burner
32 Fault in the 24 VAC
supply
33 CRC defaul values fault
34 CRC fault, BCC
35 BBC missing
36 CRC fault, BCC
37 Incorrect BCC
38 BCC no. invalid
39 BCC system error
41 Flow monitoring
50 Activation of boiler coding
card
52 Activation of boiler coding
card
60 Ionisation current
fluctuates
61 Ionisation current
drops
LED constantly red
72

Troubleshooting

Cause
TBV shutdown.
Heat exchanger severely contaminated.
No flame established during the burner start.
Flame failure within 15 s after flame recognition.
The flow/return temperature has exceeded the limit
for TW shutdown.
The flue gas temperature has exceeded the limit for
TBA shutdown.
A flame is recognised before the burner starts.
Flow temperature sensor or lead faulty.
DHW temperature sensor or lead faulty.
Outside temperature sensor or lead faulty.
Return temperature sensor or lead faulty.
A flame is recognised 15 s after burner operation,
even if gas valve 1 has received a shutdown com-
mand.
A flame is recognised 15 s after burner operation, even
if gas valve 2 has received a shutdown command.
The gas fan does not reach the required pre-purging
speed.
The gas fan does not reach the ignition speed.
The gas fan does not stop.
The EEPROM record „Gas fired condensing boiler" is Switch the power supply OFF and ON; if
The EEPROM record „Boiler" is invalid.
24 V AC supply outside the permissible range
(e.g. short circuit).
The EEPROM record „Master reset" is invalid.
Faulty boiler coding card
Boiler coding card was removed
Faulty boiler coding card
The boiler coding card is incompatible with the
control unit PCB
Faulty boiler coding card
Faulty boiler coding card
Return temperature > flow + 25 K.
The parameter plug must still be enabled
The parameter plug must still be enabled
The siphon or the flue gas system is blocked
severe storm.
Poor gas quality, monitoring electrode faulty, severe
storm.
Ionisation lead shorted out or
Ionisation electrode earthed (housing).
Remedy
Check system pressure/heatingcircuit
pump. Check the HC pump step switch.
Vent the heating system. Press the reset
button.
Check the gas supply pipe and open the
gas shut-off valve, if necessary. Check
the ignition electrode and cable. Press the
reset button.
Check CO values.
2
Check ionisation electrode and cable.
Press the reset button.
Check system pressure.
Vent the heating system.
Set the pump to stage 2 or 3.
Check for correct installation of combustion
chamber pot.
Press the reset button.
Check lead.
Check the flow sensor.
Check sensor and lead.
Check lead.
Check the outside temperature sensor.
Check lead.
Replace the return sensor.
Replace the gas combination valve.
Replace the gas combination valve.
Check the gas fan supply cable and gas
fan. Press the reset button.
Check the gas fan supply cable and gas
fan. Press the reset button.
Check the gas fan supply cable and the
gas fan. Press the reset button.
unsuccessful, replace the control PCB.
Switch the power supply OFF and ON; if
unsuccessful, replace the control PCB.
Check the three-way valve.
Check the gas fan.
Replace the control PCB.
Replace parameter plug
Korrekten Parameterstecker wieder auf-
stecken
Replace parameter plug
Refit the correct parameter plug
Replace parameter plug
Replace parameter plug
Vent the heating system, check the system
pressure.Check the heating circuit pump.
Press reset 2x
Press reset 2x
Clean siphon, check the flue gas system,
Check ventilation air, check monitoring
electrode.
Check monitoring electrode and lead.
Check the ionisation lead and position of
electrode to burner.
Press the reset button.
3061344_201509