3064816_201804
97
Fault
code
Warning
Possible causes
Remedy
54
GLV actuators
Flue gas recirculation
Incorrect gas type setting
Incorrect gas restrictor
Gas valve faulty
Fan faulty
Flue gas recirculation:
- Check flue path inside and outside the appli-
ance (leaking, blocked).
- Check wind effect.
Gas type setting
- Check gas type setting on the gas valve and
the AM/BM.
Gas restrictor:
- Remove the gas valve retainer.
- Check that the correct gas restrictor is fitted.
CGB-2-20/24: blue
CGB-2-14: black
Gas valve:
- Check cables, plugs, power supply and
switching; if valves are faulty, replace as
necessary.
Fan:
- Check for bearing damage.
- Check cables, plug-in connections, power
supply and switching.
- Replace fan if faulty.
55
GLV system error
Internal plausibility check of GBC-e
failed.
System error:
- Check for a strong electromagnetic field
nearby.
- Switch power ON/OFF; reset if necessary.
Press reset button.
58
Calibration timeout
The heating appliance cannot carry out
calibration
Flue gas recirculation
Fan faulty
Inadequate heat transfer
Flue gas recirculation:
- Check flue path inside and outside the appli-
ance (leaking, blocked).
Fan:
Check that the fan and its wiring are intact.
Inadequate heat transfer:
- Open heating circuits to ensure adequate
heat transfer.
Check IO electrode.
Press reset button.
68
GPV offset
Inadmissible GPV curves (offset)
Corrupt/incorrect EEPROM value
Gas valve faulty
Corrupt EEPROM value:
- Replace boiler coding card.
- Check leads and plug-in connections.
- If OK but no function, replace the gas valve.
69
Adaptation not possible
Fan faulty (no stable state at minimum
output)
Strong wind effect
Wind:
- Warning can occur due to strong wind.
Fan:
- If warning occurs frequently, check fan.
41. Troubleshooting warning
messages