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Code | Description | Remedy |
A1 | Pump has run dry or pump has stalled/seized |
Check for water leaks. Free the pump or replace |
A7 | Hot water NTC sensor defective. |
Check: - hot water NTC sensor - 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, - safety temp. limiters, - pump operation, - fuse on pcb, bleed appliance. |
EA | Flame not detected. |
Is gas cock turned on? Check: - gas supply pressure, - power supply, - igniter electrode and lead, - ionisation sensing electrode and lead, - flue duct and CO2 level. |
F0 | Internal error. | Check electrical connector contacts, programmer interface 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; resistance, coil 1 = 190, coil 2 = 390 - wiring to gas valve. Clean condensate trap and check electrode assembly. Flue clear? |
Fd | Reset button pressed by mistake. | Press reset button again |