Display codes
33
Condens 5000W – 6720813952 (2019/02)
- - 2 8 4 The gas valve is switched.
-- 305 The wall mounted gas condensing boiler waits
after DHW operation ends.
9 A 2 3 5 3 The HCM is too new for the burner control unit. Replace burner control unit with a model on which the most up-to-
date version of the software is installed. The software version is
specified on the barcode of the burner control unit.
9A 3603
The HCM that has been fitted is not compatible
with the burner control unit.
Check HCM number.
Fit a HCM with the correct HCM number.
9 A 3 6 1 3 The burner control unit that has been fitted is not
compatible with the HCM.
Check numbers on the burner control unit.
Fit a HCM with the correct HCM number.
9U 2333 The burner control unit or the HCM is faulty. Check plug and wiring of the burner control unit.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the burner control unit.
A 3 3 1 7 3 Short circuit in the flue gas temperature sensor
contacts.
Check the function of the flue gas temperature sensor. Replace if
necessary.
b7 2573
The burner control unit or the HCM is faulty. Check plug and wiring of the burner control unit.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the burner control unit.
C 1 2 6 4 2 No control signal or power supply to the fan during
operation.
Check plug and cabling of the fan.
Check the function of the fan, replace the component if necessary.
C4 2732
The wall mounted gas condensing boiler was
switched off for 2 minutes at the most because it
had been operating continuously for more than
24 hours. This is a safety check.
C 6 2 1 5 3 The fan speed is too high. Check plug and cabling of the fan.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the fan.
Check the plug of the burner control unit.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the burner control unit.
C 6 2 1 6 3 The fan speed is too low.
C 7 2 1 4 3 The fan does not run during the start phase (0 C).
C 7 2 1 7 3 The fan speed is irregular when starting up.
C E 2 0 7 2 Water pressure is too low. Top up heating system with water until a pressure of 2 bar is reached.
Check expansion vessel.
Check heating system for leaks.
Check wiring and function of the pressure sensor.
C E 2 6 6 3 Pump test failed. 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 function of pump.
Check function and cabling of pressure sensor.
Check the operating characteristics of the wall mounted gas
condensing boiler by replacing the component.
d 1 2 4 0 3 The contacts of the boiler return temperature
sensor have short-circuited.
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.
d 1 2 4 1 3 The contacts of the boiler return temperature
sensor have been interrupted.
d 3 2 3 2 The external switching contact has opened. Check the jumper at the connection of the external switching
contact.
Check external switching contact.
Code Code
type
Designation Remedy
To Next Page
Loading...
