Wolf CGB-2 Series Installation Instructions For Contractors page 93

Fault Fault
code
30 CRC burner control unit
32 23 V AC supply
35 BCC missing
36 BCC faulty
37 Incorrect BCC
38 BCC update required
39 BCC system error
40 Flow monitoring
(pressure increase
check)
41 Flow monitoring (check
sensor)
3064810_201804
41. Troubleshooting
Possible causes
The EEPROM record is invalid
23 V AC supply outside the permissible
range (e.g. short circuit)
Boiler coding card has been removed or
incorrectly inserted
Burner control unit was replaced and no
boiler coding card inserted
CRC fault, BCC
Faulty boiler coding card
The boiler coding card is incompatible
with the GCB-e PCB
Incorrect BCC code
Boiler coding card fault; PCB requires a
new boiler coding card (replacement)
Faulty boiler coding card
BCC copy process not started
System pressure < 150 mbar
Air in heating circuit
Pressure sensor faulty
Faulty pump
Return temperature > eHLSC
temperature + 12 K, return temperature
> boiler sensor + 12 K
System pressure too low
Air in heating circuit
Pump faulty/low output
Remedy
EEProm record invalid:
- Switch power supply OFF/ON.
- If fault persists, call out a contractor
Power supply unit:
- Switch power supply OFF/ON.
- Press reset button.
- If the fault cannot be acknowledged, re-
place HCM-2.
Boiler coding card has been removed or
incorrectly inserted.
Insert boiler coding card according to
appliance type.
CRC fault, BCC:
- Replace boiler coding card.
Press reset button.
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.
Reinsert boiler coding card.
Replace boiler coding card.
Press reset button.
Use ON/OFF switch.
Replace boiler coding card.
Press reset button and enter contractor code
1111.
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.
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.
93