Worcester Bosch Greenstar Ri Boiler Error Codes

Fault Description	System Behaviour
No light	No power at control board
Light on	Appliance on but not operating during demand
Slow flash ( mostly off flashes on)	Ignition lockout
Slow flash ( mostly on flashes off)	Flue overheat or heat exchanger overheat
Fast flash	Volatile lockout sensor fan or code plug
2 pulses	Check service mode switch is in minimum position
5 pulses	Check service mode switch is in max position