Glow-worm Energy Boiler Range Error Codes

Glow-worm Energy Boiler Range Error Codes

Fault Code Cause of Problem
F.00 Flow temperature sensor
F.00 Flow temperature sensor
F.10 Flow temperature sensor short circuit
F.11 Flow temperature sensor short circuit
F.12 and F.91 Cylinder temperature sensor short circuit
F.13 Domestic hot water cylinder temperature sensor short circuit
F.20 Safety switch-off – overheating temperature reached
F.22 Safety switch-off – low water pressure in the boiler
F.23 Safety switch-off – temperature difference too great (NTC1/NTC2)
F.24 Safety switch-off – temperature rise too fast
F.25 Safety switch-off – flue gas temperature too high
F.27 Safety switch-off – fault in flame detection
F.28 Ignition unsuccessful when starting up
F.29 Flame loss
F.32 Fan frost protection function active – fan speed outside the tolerance values
F.33 Fan frost protection function active – air pressure switch fault
FA9 eBUS fault – voltage too low
F.61 Gas valve control system fault
F.82 Gas valve switch-off control fault
F.83 EEPROM fault – electronics defective
F.64 Electronics/sensor/analogue-to-digital converter fault
F.85 Electronics temperature too high
F.67 Value sent back by ASIC is incorrect (flame slgnal)
F.88 Unstable flame (analogue input), underfloor heating contact or gas valve fault
F.70 Invalid product code (DSN)
F.71 Flow/return temperature sensor
F.72 Deviation in the water pressure sensor/return temperature sensor
F.73 Water pressure sensor not connected or has short-circuited
F.74 Electrical problem in the water pressure sensor
F.75 Pressure sensor fault
F.78 The safety cut-out in the primary heat exchanger is defective
F.77 Fault: Condensate or smoke
F.78 Interruption to domestic hot water (DHW) outlet sensor at external controller
F.83 Burner temperature sensor fault
F.84 Flow/return temperature sensor fault
F.85 Temperature sensor fault
F.87 Electrodes fault
F.89 Pump fault
Connection No communication between the printed circuit board (PCB) and the user interface

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