10.1.2 Fault Code Table - Worcester Greenstar 8000 Life Series Installation And Maintenance Instructions Manual

Fault finding and diagnosis
Fault category W (maintenance codes)

10.1.2 Fault code table

Fault text on the display, description
200 O Boiler in heating mode
201 O Boiler in hot water mode
202 O Boiler in anti-cycle mode
203 O Boiler in standby, no heat energy demand
204 O Current prim. water temp. higher than set
val.
208 O Chimney sweep demand
224 V Safety temp. limiter has tripped
227 V No flame signal after ignition
228 V Flame signal without flame present
305 O Boiler in hot water anti-cycle mode
306 V Flame signal after closing the fuel supply
360 V Incompatible code plug.
815 W Low loss header temp. sensor faulty
1010 O No BUS communication. Cable for EMS-Bus
is not correct connect or damaged.
1017 W Water pressure too low
1021 B Hot water temperature sensor is defective 1. Connect the plug to the hot water temperature sensor correctly.
1037 W Outside temperature sensor defective
1065 B Pressure sensor defective or not connected 1. Connect the plug to the pressure sensor correctly.
1068 W Outside temperature sensor defective
1073 W Short circuit of the flow temperature sensor 1. Replace the temperature sensor.
1074 W No signal from the flow temperature sensor
available
62
Remedy
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1. Open the closed valve in the heating circuit.
2. Top up water until the preset pressure is reached.
3. Connect the plug correctly to the safety temperature limiter.
4. Replace the safety temperature limiter.
1. Open the gas isolator.
2. Change the gas installation.
3. Replace the control unit/burner control unit.
4. Replace the ignition electrode.
5. Replace the monitoring electrode.
6. Replace the ignition cable.
7. Replace the ionisation cable.
8. Replace the air/gas ratio control valve.
9. Correct the burner setting.
1. Replace the air/gas ratio control valve.
2. Replace the ionisation cable.
3. Replace the control unit/burner control unit.
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1. Replace the air/gas ratio control valve.
2. Replace the ionisation cable.
3. Replace the control unit/burner control unit.
1. Check if a correct code plug is installed.
2. Exchange or reconnect code plug.
1. Check the sensor port.
2. Check the differential sensor for incorrect installation position or breakage.
1. Connect the cable for the EMS-Bus correct or replace the damaged cable.
2. Exchange fuse.
1. Top up water and vent the system.
2. Replace the pressure sensor.
2. Mount the hot water temperature sensor correctly.
3. Replace the hot water temperature sensor.
4. Replace the connecting lead to the hot water temperature sensor.
The control panel is receiving unrealistic values from the outside sensor. Effect: The
minimum outside temperature is used.
2. Replace the connecting lead to the pressure sensor.
3. Replace the pressure sensor.
4. Replace the control unit.
Outdoor temperature sensor is defective.
2. Replace the connecting lead to the temperature sensor.
3. Replace the control unit.
1. Connect the plug to the flow temperature sensor correctly.
2. Replace the flow temperature sensor.
3. Replace the connecting lead to the flow temperature sensor.
4. Replace the control unit.
Greenstar 8000 Life – 6720883865 (2019/02)