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Code
Parameter
F.35
Fault: Air/flue gas duct
F.42
Fault: Coding resistor
F.49
Fault: eBUS
F.55
Fault: CO sensor
F.56
Safety switch-off: CO limit exceeded
F.57
Fault: Measuring program
F.61
Fault: Fuel valve actuation
F.62
Fault: Fuel valve switch-off delay
F.63
Fault: EEPROM
F.64
Fault: Electronics/sensor
F.65
Fault: Electronics temp.
F.67
Fault: Electronics/flame
F.68
Fault: Flame signal unstable
F.70
Fault: Invalid Device Specific Number
0020189875_01 ecoTEC exclusive Installation and maintenance instructions
Possible causes
Check the entire air/flue pipe for:
–
Permitted design
–
Restriction or blockage in the air/flue pipe caused by obstructions
–
Damage
The air/flue pipe must be installed in accordance with the recognised
rules
If the supply of combustion air (air pipe) or discharge of flue gas (flue
pipe) occurs with no problems, clear any faults in the product with
and start it up
If F.35 occurs again after start-up and the air/flue pipe is present and
correct, the function for checking the air/flue pipe can be deactivated via
D.145
If the function is deactivated via D.145, any faults can be cleared in the
product
and it can be started up
Note
D.145 can be used to permanently activate or deactivate the function
After the function is deactivated, the product no longer automatically
checks whether there are restrictions for the air/flue pipe.
Gas family coding resistor short circuit/interruption (on the PCB)
–
Gas family coding resistor missing
–
The coding resistor does not match the gas type selection under
D.087
Incorrect coding resistor or incorrect gas type selected
Short circuit on eBUS, eBUS overload or two power supplies with differ-
ent polarities on the eBUS
Checking the cable harness
All-gas sensor defective, replace the all-gas sensor
Electronics defective, replace the PCB
Safety shutdown: CO limit value exceeded
A component in the combustion regulation is defective
–
Contact fault at the gas valve assembly (plug not plugged in cor-
rectly or not plugged in, plug defective, slot is defective (loose con-
nection))
–
If the fault occurs again after being reset: The gas valve assembly is
defective
Active comfort protection mode has detected a regulation fault
–
Ignition electrode highly corroded
The gas valve assembly cannot be actuated
–
Cable harness supply line to the gas valve assembly is defective
(short to earth, short circuit)
–
Gas valve assembly defective
–
PCB defective
Delayed switch-off sequence of gas valve assembly detected
–
Flame indicator light (ignition and monitoring electrode indicates
delayed extinguishing of the flame signal)
–
Gas valve assembly defective
–
PCB 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, condensate
route blocked, ionisation flow interruption (cable, electrode), flue gas
recirculation, condensate route
If spare parts fitted: Display and PCB replaced at same time and DSN
not reset, incorrect or missing output range coding resistor
Appendix
41
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