Worcester Greenstar 30 CDi Classic System ErP Boiler Fault Codes

Code	Description	Remedy
A7	Hot water NTC sensor defective	Check hot water NTC sensor and connecting lead for circuit breaks/short circuits.
A8	Break in communication to FX/Sense controls.	Check electrical connections
b1	Code plug not detected.	Insert code plug correctly, test and replace if necessary
C6	Fan speed too low.	Check fan lead and connector, and fan; replace as necessary
E2	CH flow NTC sensor defective.	Check CH flow NTC sensor and connecting lead.
E9	Safety temp. limiter in CH flow has tripped.	Check system pressure, check safety temp. limiters, check pump operation, check fuse on pcb, bleed appliance.
EA	Flame not detected/Ignition lockout.	Is gas cock turned on? Check gas supply pressure, power supply, igniter electrode and lead, ionisation sensing electrode and lead and CO2 level. Check the condition of the flue, is it blocked? Check the condensate pipe, is it blocked or frozen?
F0	Internal error	Check electrical connector contacts, programmer inter-face module ignition leads are not loose; replace pcb if necessary.
F7	Flame detected even though appliance switched off	Check electrode assembly, dry pcb. Flue clear?
FA	Flame detected after gas shut off.	Check gas valve and wiring to gas valve. Clean condensation trap and check electrode assembly. Flue clear?
Fd	Reset button pressed by mistake	Press reset button again