Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual page 79

Description
2923 V Boiler electr. system fault
2924
2925
2926
2928 Internal fault
2931 System fault boiler electronics / basic
controller
2940 V System fault burner control unit
2946 V Incorrect code plug detected
2948 B No flame signal with low output
2949 B No flame signal with high output
2950 B No flame signal following starting procedure 1. Check the CO
2951 V Loss of flame too many times
2952 V Internal fault when testing the ionisation
signal
2955 B Boiler does not support the parameters set
for the hydraulic configuration
2956 O Hydraulic configuration at the boiler
activated
2957 V Boiler electr. system fault
Greenstar 8000 Life – 6720883865 (2021/11)
Remedy
1. Check the voltage to the gas valve.
2. Check the resistance of the gas valve coils.
3. Check the continuity of harness and replace if required.
4. The gas valve or the PCB may have a fault.
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective.
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective.
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective.
1. Check the code plug and the part number.
2. Check the code plug connections for damage.
3. Replace the code plug.
The burner starts automatically after purging. It may cause strong winds.
1. If the fault occurs repeatedly: check the settings of the CO
2. Check the flue integrity.
3. Check the flue terminal.
It may cause strong winds or flue gas recirculation. The burner starts automatically
after purging.
1. Check the flue integrity.
2. Check the flue terminal position.
3. Check the CO settings and adjust.
2
4. Check the burner and the heat exchanger gaskets and the inner flue gaskets.
5. Check the gas pressure during burning at full load (working pressure, dropping
low).
settings and adjust.
2
2. Check the burner and the heat exchanger gaskets.
3. Check the gas pressure during burning at full load.
4. Burner restarts automatically after purging.
Note: Combustion case off can case this fault.
1. Refer to blocking errors(s) that lead to this locking error. Check the fault history on
the appliance.
2. Possibly the purging of the gas pipe is incomplete.
3. It could also indicate a wide variety of issues such as pipework undersized or gas
pressure dropping off, incorrectly routed condens drains, incorrectly sited flues,
incorrectly wired etc.
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective.
Verify that the following settings are correct. This can only be reset by powering off the
appliance.
1. Low loss header setting = OFF
2. Internal DHW hydraulic = 1/ON
3. Heat circuit 1 hydraulic = 1/ON
4. CH hydraulic = 1/ON
Verify that the following settings are correct. This can only be reset by powering off the
appliance.
1. Low loss header setting = OFF
2. Internal DHW hydraulic = 1/ON
3. Heat circuit 1 hydraulic = 1/ON
4. CH hydraulic = 1/ON
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective and
must be replaced.
Fault finding and diagnosis
values.
2
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