Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual page 77

Description
269 V Flame monitoring
273 B Operation of burner and fan interrupted
281 B Pump stuck or running in air
283 O Burner starting
284 O Opening air/gas ratio control valve/oil
solenoid valves
305 O Boiler in hot water anti-cycle mode
306 V Flame signal after closing the fuel supply
357 O Ventilation program
358 O Anti-seizing functn. active
360 V System fault boiler electronics / basic
controller
362 V Boiler identification module or boiler
electronics faulty
363 V System fault boiler electronics / basic
controller
604 System fault burner control unit
815 W Low loss header temp. sensor faulty
1010 O No communication via EMS BUS
connection
1013 Max. combustion point reached
1017 W System pressure too low
1018 Maintenance interval expired
1019 Incorrect pump type detected
Greenstar 8000 Life – 6720883865 (2021/11)
Remedy
1. Restart the appliance to see if the problem re-occurs.
2. Check the electrical connections on the board (check for loose wires etc.).
3. Replace the control unit (PCB).
Not applicable, status message.
1. Check the flow pressure in system.
2. Check the system for circulation issues (air locks, blockage, restriction).
3. Check that the tacho cable plug for the circulation pump is fitted correctly.
4. Check the tacho cable for continuity and replace the tacho cable if required.
5. Replace the pump.
Operating message, is not a fault.
Operating message, is not a fault.
Anti-fast cycle mode, domestic hot water keep warm function.
1. Diverter valve is held in the hot water position for a period of time.
2. Check for false demands on the cold water inlet.
Tip: Ensure the working pressure returns immediately to the standing pressure when
the gas valve closes.
1. Check the gas supply to the property and the inlet on the gas valve (check drop on
inlet).
2. Check the gas valve is not passing and replace if required.
3. Replace the PCB.
Operating message, is not a fault: Venting program has been activated.
Operating message, is not a fault: blocking protection for the heating pump and the 3-
way valve is active.
1. Wrong code plug is inserted.
2. Check the code plug is not damaged.
3. Replace the code plug if required.
1. Wrong code plug is inserted.
2. Check the code plug is not damaged.
3. Replace the code plug if required.
1. Check and replace the ionisation cable.
2. Check and replace the electrodes if required.
3. Check and replace the control unit and/or burner control unit.
1. Restart the appliance to see if the problem re-occurs.
2. If the fault remains after resetting: the burner controller (PCB) is defective.
Tip: Check menu has not been accidently switched on.
Moisture on the connectors – PCB fault.
1. Check the HMI plug on far right of the PCB (low voltage connection).
2. If using the Key: Check the Key connections (black, white, red, green) are plugged
in to the correct position on the PCB. (Next to orange BUS connection leaving one
space.) Check the pins on the plug.
3. Check the bridging links are in LR & 230 V out.
4. Replace the board.
5. Occasionally the Key connection (green flap) can cause this.
6. Check the 230 V external wiring does not run alongside the BUS connections.
1. Check the maintenance menu.
2. Reset the maintenance code via the reset menu.
1. Top up water and vent the system.
2. Check the voltage to the pressure sensor and the signal back from the pressure
sensor.
3. Replace the pressure sensor.
1. Check the maintenance date set in the menu.
2. Reset the maintenance code via the reset menu.
1. Pump communication failure or wrong pump is fitted (non-ErP).
2. Check the pump communication wire is connected and has continuity.
3. Replace the pump for correct modulating pump.
Fault finding and diagnosis
77