| Code |
Description |
Remedy |
| A7 |
Hot water NTC sensor defective |
Check hot water NTC sensor and connecting lead for short circuit/circuit breaks |
| A8 |
Break in communication to TD200 or/and RT10 |
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 |
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 and wiring to gas valve. Clean condensation trap and check electrode assembly. Flue clear? |
| Fd |
Reset button pressed by mistake |
Press reset button again. |
