Display codes
Condens 5000W – 6720813952 (2019/02)
34
d 4 2 1 3 The actual temperature recorded by the flow
temperature sensor or return temperature sensor
is rising too quickly.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check cabling to the pump and corresponding sensors. Replace the
component if necessary.
d 4 2 7 1 2 Actual temperature differential between flow and
safety temperature sensor is too high.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check the operating characteristics and cabling of the pump and
corresponding sensor. Replace the component if necessary.
d 4 2 8 6 3 The boiler return temperature sensor has detected
a return temperature higher than 105 °C.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check plug and cabling of the boiler return temperature sensor.
Check the function of the wall mounted gas condensing boiler by
replacing the boiler return temperature sensor.
E 2 2 2 2 3 Short circuit in the flow temperature sensor
contacts.
Check the plug of the sensor.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the sensor.
E 2 2 2 3 3 The flow temperature sensor contacts have been
interrupted.
E 5 2 1 8 3 The temperature captured by the flow
temperature sensor exceeds 105 °C.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check the operating characteristics of the pump and the flow
temperature sensor. Replace the component if necessary.
E 9 2 1 0 3 The temperature measured by the flue gas
thermostat is too high and it is open.
Check the function of the flue gas thermostat. Replace if necessary.
Check the wall mounted gas condensing boiler for soiling. Carry out
a service if necessary.
E 9 2 1 9 3 The safety temperature sensor has captured a
temperature in excess of 105 °C.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check the operating characteristics of the pump and the sensor.
Replace the component if necessary.
E 9 2 2 0 3 The contacts for the safety temperature sensor
have shorted or the safety temperature sensor has
detected a temperature higher than 130 °C.
E 9 2 2 1 3 The contacts of the safety temperature sensor
have been interrupted.
Check the plug of the sensor.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the sensor.
E 9 2 2 4 3 The temperature measured by a device thermostat
(e.g. maximum or burner thermostat) is too high
and it is open.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check burner gaskets for flue gas leaks. Replace burner gaskets if
necessary.
Check the heat exchanger for soiling.
Check gas/air ratio.
E 9 2 7 6 2 The temperature captured by the flow
temperature sensor exceeds 95 °C.
Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
Check whether it is possible to achieve a sufficient flow via the
heating system.
Check cabling and function of pump and flow temperature sensor.
Replace the component if necessary.
Code Code
type
Designation Remedy
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