Fault finding and diagnosis
67
Greenstar 8000 Style – 6720883864 (2019/02)
Fault category W (maintenance codes)
10.1.2 Fault code table
Fault
code
Fault
category
Fault text on the display, description
Remedy
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
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.
227
V
No flame signal after ignition
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.
228
V
Flame signal without flame present
1. Replace the air/gas ratio control valve.
2. Replace the ionisation cable.
3. Replace the control unit/burner control unit.
305
O
Boiler in hot water anti-cycle mode
–
306
V
Flame signal after closing the fuel supply
1. Replace the air/gas ratio control valve.
2. Replace the ionisation cable.
3. Replace the control unit/burner control unit.
815
B
Low loss header temp. sensor faulty
1. Check the sensor port.
2. Check the differential sensor for incorrect installation position or breakage.
1017 W
Water pressure too low
1. Top up water and vent the system.
2. Replace the pressure sensor.
1021 B
Hot water temperature sensor is defective
1. Connect the plug to the hot water temperature sensor correctly.
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.
1037 W
Outside temperature sensor defective
Check the connecting lead.
1065 B
Pressure sensor defective or not connected 1. Connect the plug to the pressure sensor correctly.
2. Replace the connecting lead to the pressure sensor.
3. Replace the pressure sensor.
4. Replace the control unit.
1068 W
Outside temperature sensor defective
Check the connecting lead.
1073 W
Short circuit of the flow temperature sensor 1. Replace the temperature sensor.
2. Replace the connecting lead to the temperature sensor.
3. Replace the control unit.
1074 W
No signal from the flow temperature sensor
available
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.
1075 W
Short circuit of the temperature sensor at
the heating block
1. Replace the temperature sensor.
2. Replace the connecting lead to the temperature sensor.
3. Replace the control appliance.
1076 W
No signal from the temperature sensor at
the heating block available
1. Replace the temperature sensor.
2. Replace the connecting lead to the temperature sensor.
3. Replace the control unit.