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Worcester GR2300iW C Installation And Maintenance Instructions

Worcester GR2300iW C
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Fault finding and diagnosis
81
Greenstar 2000 – 6 721 820 552 (2021/02)
2927 B Flame failed during burner operation Check the gas supply to the property and the inlet on the gas valve (check drop on inlet)
and replace if required.
Check the flame sense probe and the earth to the heat exchanger.
Check the voltage to the gas valve and the continuity of harness and replace if required.
Check the condition of the bearing plate.
Check the flame sense plug is connected and the continuity of harness and replace if
required.
Check the fan pressure.
Check the siphon trap and the discharge route.
Check the flue integrity test.
2928 Internal error Restart the appliance to see if the problem re-occurs.
If the fault remains after resetting: the burner controller (PCB) is defective.
2930 V System fault boiler electronics / basic
controller
If the fault persists following a reset, the burner control unit is faulty and must be
replaced.
2931 Illegal instruction executed by
microcontroller
Restart the appliance to see if the problem re-occurs.
If the fault remains after resetting: the burner controller (PCB) is defective.
2932 System fault boiler electronics / basic
controller
Perform factory reset.
If problem persists, replace PCB
2940 V Low voltage Restart the appliance to see if the problem re-occurs.
If the fault remains after resetting: the burner controller (PCB) is defective.
2941 B Insuff. flow rate in boiler Check plug of flow temperature sensor, connect correctly if required.
Check flow temperature sensor, replace if necessary.
Check pump for blockage, clear if required.
Check pump settings, correct if required.
Check water pressure, if necessary top up until the pre-set pressure is reached.
2942 No speed feedback signal from fan Connect plug for speed control to the fan.
Connect plug for power supply to the fan.
Check fan harness.
Check and replace control unit.
2943 Mains voltage too low Establish supply voltage of at least 196 VAC.
2945 V Too many short heat demands in short time
period
Reset appliance - factory reset.
Increase restart blocking time.
Make sure that at least one thermostatic valve is open.
Check and replace faulty heating pump.
Check diverter valve functionality, replace if necessary.
2946 V Incorrect code plug detected If code plug is present:
Check that correct plug is inserted.
Check the code plug is not damaged.
Check code plug against the part number.
Replace the code plug if required.
If code plug is not present:
Check appliance electronics (PCB), replace if necessary.
2947 R Incorrect code plug detected The function stops automatically.
2948 B No flame signal with low output The burner starts automatically after purging. It may cause strong winds.
If the fault occurs repeatedly: check the settings of the CO
2
values.
Check the flue integrity.
Check the flue terminal.
2949 B No flame signal with high output It may cause strong winds or flue gas recirculation. The burner starts automatically after
purging.
Check the flue integrity.
Check the flue terminal position.
▶Check the CO
2
settings and adjust.
Check the burner and the heat exchanger gaskets and the inner flue gaskets.
Check the gas pressure during burning at full load (working pressure, dropping low).
Fault
code
Fault
category
Description Remedy

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Worcester GR2300iW C Specifications

General IconGeneral
BrandWorcester
ModelGR2300iW C
CategoryBoiler
LanguageEnglish

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