Code
Text display
Possible cause/check
E00.20
Flue gas temperature sensor is either removed or
measure a temperature below range
Open circuit in flue gas sensor:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
E00.21
Flue gas temperature sensor is either shorted or
measure a temperature above range
Flue gas sensor short-circuited:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
E00.40
Water pressure sensor is either removed or measure a
temperature below range
Hydraulic pressure sensor open:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
E00.41
Water pressure sensor is either shorted or measure a
temperature above range
Hydraulic pressure sensor short-circuited:
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Faulty sensor: replace the sensor.
E01.04
5x Error of unintended Flame Loss occurance
Flame loss occurs 5 times:
Purge the gas supply to remove air.
Check whether the gas tap is properly open.
Check the gas supply pressure.
Check the operation and setting of the gas valve
unit.
Check that the air inlet and flue gas discharge flues
are not blocked.
Check that there is no recirculation of flue gases.
E01.12
Return tempearture has a higher temperature value
then the flow temperature
Flow and return reversed:
Bad connection: check the wiring and connectors.
Water circulation in wrong direction: check the circu
lation (direction, pump, valves).
Incorrectly fitted sensor: check that the sensor has
been correctly fitted.
Malfunctioning sensor: check the Ohmic value of the
sensor.
Faulty sensor: replace the sensor.
E02.04
Parameter Error
Configuration error or factory settings incorrect:
Parameters are not correct:
Restart boiler
Reset
and
.
Replace the control panel if it is defective.
E02.13
Blocking Input of the Control Unit from device external
environment
Blocking input is active:
External cause: remove external cause.
Wrong parameter set: check the parameters.
E02.15
External CSU Timeout
CSU time out:
Bad connection: check the wiring and connectors.
Faulty CSU: replace CSU.
E02.17
Gas Valve Control unit communication has exceeded
feedback time
Communication error with the safety PCB:
Bad connection: check the wiring and connectors.
Control unit failure: replace the control unit.
E02.35
Safety critical device has been disconnected
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12 Troubleshooting
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