0020308121_04 Installation and maintenance instructions
81
Code/meaning
Possible cause
Measure
F.090
Communication with the internal
cylinder has been interrupted.
Interruption in the wiring har-
ness
▶
Check the wiring harness including all plug connections and, if
required, replace it.
Plug on PCB loose/not plugged
in
▶
Check the plug and the plug connection.
F.092
The gas-type conversion was
not completed correctly.
Gas conversion in
D.156
not
completed
▶
Check the setting in
D.156
.
F.095
The gas valve stepper motor
has reached the minimum per-
missible step number.
Fault in the flue gas route
caused by recirculation or flue
gas blockage
▶
Check the entire flue gas route.
Condensate in the combustion
chamber due to a blocked con-
densate discharge
1.
Check and, if required, clean the condensate discharge pipe
including the siphon.
2.
Check the combustion chamber (electrodes, insulating mats,
burner).
3.
If required, replace the insulating mats in the combustion
chamber.
Condensate pump (if fitted)
defective
▶
Check and clean the condensate pump. Replace the condens-
ate pump, if required.
Incorrect gas type set
▶
Check the gas type and the gas type setting under
D.156
and
D.157
.
Gas valve assembly offset in-
correctly stored in
D.052
und
ggf.
D.182
▶
Check the offset setting for the gas valve assembly.
Burner defective
▶
Check and, if required, replace the burner.
Gas valve assembly defect-
ive/incorrect spare part gas
valve assembly
▶
Check and, if required, replace the gas valve assembly.
Fault in the electrical connection
for the gas valve assembly
▶
Check the wiring harness between the PCB and gas valve
assembly, including all plug connections.
Control electrode defective
▶
Check and, if required, replace the control electrode.
PCB defective
▶
Replace the PCB.
Air-mass flow sensor dirty or
defective (only in conjunction
with the conversion set compris-
ing the air intake pipe with in-
tegrated non-return valve and
air-mass flow sensor)
1.
Check the air-mass flow sensor for dirt.
2.
If required, replace the entire air intake pipe.
F.096
The gas valve stepper motor
has reached the maximum per-
missible step number.
Gas connection pressure too
low
▶
Check the gas connection pressure.
Fault in the flue gas route
caused by recirculation or flue
gas blockage
▶
Check the entire flue gas route.
Incorrect gas type set
▶
Check the gas type and the gas type setting under
D.156
and
D.157
.
Gas valve assembly offset in-
correctly stored in
D.052
und
ggf.
D.182
▶
Check the offset setting for the gas valve assembly.
Condensate in the combustion
chamber due to a blocked con-
densate discharge
1.
Check and, if required, clean the condensate discharge pipe
including the siphon.
2.
Check the combustion chamber (electrodes, insulating mats,
burner).
3.
If required, replace the insulating mats in the combustion
chamber.
Condensate pump (if fitted)
defective
▶
Check and clean the condensate pump. Replace the condens-
ate pump, if required.
Fault in the electrical connection
for the gas valve assembly
▶
Check the wiring harness between the PCB and gas valve
assembly, including all plug connections.
Control electrode defective
▶
Check and, if required, replace the control electrode.
Burner defective
▶
Check and, if required, replace the burner.
Gas valve assembly defect-
ive/incorrect spare part gas
valve assembly
▶
Check and, if required, replace the gas valve assembly.
PCB defective
▶
Replace the PCB.
Summary of Contents for ecoTEC plus VUI Series
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