Display codes
Condens 5000W – 6720813952 (2019/02)
36
Table 14 Operating and fault codes
F 0 2 4 2 3 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.
F 0 2 4 3
F 0 2 4 4
F 0 2 4 5
F 0 2 4 6
F 0 2 4 7
F 0 2 4 8
F 0 2 4 9
F 0 2 5 0
F 0 2 5 1
F 0 2 5 2
F 0 2 5 3
F 0 2 5 5
F 0 2 5 9
F 0 2 6 3
F 0 2 6 7
F 0 2 7 2
F 0 2 7 8 3 The sensor test has failed. Check cabling and plug of the sensor.
Check the operating characteristics of the sensor. Replace the
component if necessary.
F 0 2 7 9 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.
F 0 2 8 0 3 The burner control unit is faulty.
F 0 2 8 7 The burner control unit or the HCM is faulty.
F 0 2 9 0 2 The burner control unit or the HCM is faulty.
F 7 2 2 8 3 An ionisation current was measured before the
burner started.
Check the plug of the ionisation pin for damage and wear.
Check ignition device for damage and wear. Replace the component
if necessary.
F 7 3 2 8 2 A brief power failure has occurred. Check whether the fault may have been caused by the presence of a
power unit, a wind turbine or other equipment that could cause an
interruption.
Check the electrical installation.
F A 3 0 6 3 An ionisation current was measured after the
burner went out.
Inspect the ionizing part of the ignition device. Replace the
component if necessary.
Check whether the gas/air ratio upstream and downstream of the
burner phase remains the same.
Check whether voltage is present at the gas valve once the burner
phase has expired.
Check the operating characteristics of the appliance by replacing the
burner control unit.
F d 2 3 1 3 The mains voltage was interrupted during an
interlocking fault.
Reset the wall mounted gas condensing boiler.
E C 2 5 6 3 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.
E H 2 5 8
H 0 7 The actual water pressure is too low. This limits the
performance in heating mode as well as DHW
mode.
Vent the heating system and wall mounted gas condensing boiler.
Refill the heating system.
H r E The wall mounted gas condensing boiler is reset.
r E The wall mounted gas condensing boiler is reset.
Code Code
type
Designation Remedy
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