Wolf CGB-2 Series, Installation Instructions For Contractors

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41. Troubleshooting
Fault
code
Fault Possible causes Remedy
30 CRC burner control unit The EEPROM record is invalid EEProm record invalid:
- Switch power supply OFF/ON.
- If fault persists, call out a contractor
32 23 V AC supply 23 V AC supply outside the permissible
range (e.g. short circuit)
Power supply unit:
- Switch power supply OFF/ON.
- Press reset button.
- If the fault cannot be acknowledged, re-
place HCM-2.
35 BCC missing Boiler coding card has been removed or
incorrectly inserted
Burner control unit was replaced and no
boiler coding card inserted
Boiler coding card has been removed or
incorrectly inserted.
Insert boiler coding card according to
appliance type.
36 BCC faulty CRC fault, BCC
Faulty boiler coding card CRC fault, BCC:
- Replace boiler coding card.
Press reset button.
37 Incorrect BCC The boiler coding card is incompatible
with the GCB-e PCB
Incorrect BCC code
Use ON/OFF switch.
Boiler coding card incompatible.
Enter BCC code from the type plate correctly.
Insert the correct boiler coding card.
Press reset button and enter contractor code
1111.
38 BCC update required Boiler coding card fault; PCB requires a
new boiler coding card (replacement)
Reinsert boiler coding card.
Replace boiler coding card.
Press reset button.
39 BCC system error Faulty boiler coding card
BCC copy process not started Use ON/OFF switch.
Replace boiler coding card.
Press reset button and enter contractor code
1111.
40 Flow monitoring
(pressure increase
check)
System pressure < 150 mbar
Air in heating circuit
Pressure sensor faulty
Faulty pump Check system pressure.
Vent heating circuit.
Pressure sensor:
- Check leads and plug-in connections.
- If OK, replace pressure sensor.
Pump:
- Check if pump is running.
- If not, check cables and plugs.
- If electrical connection OK and no function:
Replace pump.
Press reset button.
41 Flow monitoring (check
sensor)
Return temperature > eHLSC
tempe 12 K, return temperature
> boiler 12 K
System pressure too low
Air in heating circuit
Pump faulty/low output
Check system pressure.
Vent the system.
Flow monitoring:
- Increase minimum pump speed
Pump:
- Check if pump is running.
- If not, check cables and plugs.
- If electrical connection OK and no function:
Replace pump.