Glow-worm EASICOM 3 28c Installation And Maintenance Instructions Manual page 36

Appendix
Fault code Meaning
F.32 Fan frost protection function active: Fan
speed outside the tolerance values
F.49 eBUS fault: Voltage too low
F.61 Fault: Gas valve assembly control
F.62 Fault: Gas valve switch-off control
F.63 Fault: EEPROM
F.64 Fault: Electronics/sensor/analogue-to-
digital converter
F.65 Fault: Electronics temperature too high
F.67 Value sent back by ASIC is incorrect
(flame signal)
F.68 Fault: Unstable flame (analogue input)
F.70 Invalid product code (DSN)
F.71 Fault: Flow/return temperature sensor
F.72 Fault: Deviation in the water pressure
sensor/return temperature sensor
F.73 Fault: Water pressure sensor not con-
nected or has short-circuited
F.74 Fault: Electrical problem in the water
pressure sensor
F.75 Fault: Pressure sensor
F.77 Fault: Condensate or smoke
F.78 Interruption to DHW outlet sensor at the
external control
F.83 Fault: Dry fire
F.84 Fault: Flow/return temperature sensor
F.85 Fault: Temperature sensor
F.86 Fault: Underfloor heating contact
F.87 Fault: Ignition electrode
F.88 Fault: Gas valve assembly
F.89 Fault: Pump
36
Possible cause
Plug on fan not correctly plugged in, multiple plug on PCB not correctly
plugged in, break in cable harness, fan blocked, Hall sensor defective, elec-
tronics defective
Short circuit on eBUS, eBUS overload or two power supplies with different
polarities on the eBUS
Short circuit/short to earth in cable harness for the gas valve assembly, gas
valve assembly defective (coils shorted to earth), electronics defective
Delayed switch-off of gas valve assembly, delayed extinguishing of flame
signal, gas valve assembly leaking, electronics defective
Electronics defective
Flow or return NTC short circuited, electronics defective
Electronics overheating due to external influences, electronics defective
Implausible flame signal, electronics defective
Air in gas, gas flow pressure too low, incorrect air ratio, incorrect gas in-
jector, ionisation flow interruption (cable, electrode)
Replace the screen and PCB at the same time without reconfiguring the
product's Device Specific Number
Flow temperature sensor specifies a constant value: Flow temperature
sensor incorrectly attached to the flow pipe, flow temperature sensor de-
fective
Flow/return NTC temperature difference too great → flow and/or return tem-
perature sensor defective
Interruption/short circuit of water pressure sensor, interruption/short to earth
in supply pipe to water pressure sensor or water pressure sensor defective
Line to water pressure sensor has a short circuit to 5 V/24 V or internal fault
in the water pressure sensor
Pressure sensor or pump defective or water deficiency
No response, flue non-return flap defective
Link box connected, but domestic hot water NTC not bridged
When the burner starts, the temperature change recorded by the flow or
return temperature sensor is non-existent or too small: Insufficient water in
the product, flow or return temperature sensor incorrectly attached to the
pipe
Values not consistent, difference < -6 K
Flow and return temperature sensors signalling implausible values: Flow and
return temperature sensors have been inverted, flow and return temperature
sensors have not been correctly installed
The flow and/or return temperature sensors have been installed on the same
pipe/incorrect pipe
Temperature sensor not connected or is connected incorrectly
Underfloor heating contact open, sensor disconnected or defective
Ignition electrode not connected properly, short circuit in the cable harness
Gas valve assembly not connected or it is connected incorrectly, short circuit
in the cable harness
Pump not connected or it is connected incorrectly, incorrect pump connec-
ted, short circuit in the cable harness
Installation and maintenance instructions EASICOM 3 0020239562_02