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boiler service, boiler repair, emergency repair
Worcester Greenstar 18i System Erp Boiler Fault Codes
| Display Text | Fault Code |
Cause Code |
Description | Possible Solution |
|
226 |
Service tool has been connected | In the blocking error history menu it records if the service tool has been connected | ||
| Electrical interruption fault | Fd |
231 |
The power has been interrupted during a lockout |
▶ Check locking error history: – Lockout fault will always be last code before FD code. ▶ Reset the appliance |
| Fan/Airflow fault | C7 |
214 |
Fan does not run during the start up phase |
▶ Check: – Fan harness and connector. – 230 Vac across brown and blue wires. – Fan operation, replace if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Fan/Airflow fault | C6 |
215 |
Fan speed too high |
▶ Check: – Fan harness and connector. – Fan operation, replace if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Fan/Airflow fault | C6 |
216 |
Fan speed too low |
▶ Check: – Fan harness and connector. – Fan operation, replace if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Fan/Airflow fault | C7 |
217 |
Fan has stopped during appliance operation |
▶ Check: – Fan harness and connector. – 230 Vac across brown and blue wires. – Fan operation, replace if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Fan/Airflow fault | C1 |
264 |
Fan stopped during operation |
▶ Check: – Fan harness and connector. – 230 Vac across brown and blue wires. – Operation, replace if necessary. |
| Fan/Airflow fault | C4 |
273 |
Continuous fan operation for the last 24 hours (appliance temporary blocked) | ▶ Check if demand has been calling for the 24 hours. Appliance has been blocked from firing for a minimum of 2 minutes as it has been operated continuously for 24 hours. |
| Flow sensor fault | E2 |
222 |
Flow temperature sensor shorted |
▶ Check: – Sensor harness and connector. – Operation, replace if necessary. |
| Flow sensor fault | E2 |
223 |
Flow temperature sensor disconnected |
▶ Check: – Sensor harness and connector. – Operation, replace if necessary. |
| Flow sensor fault | E9 |
276 |
Primary Flow temperature exceeded 95 °C |
▶ Check: – Primary system water pressure. – For air in the system – Circulation within heating system. – Wiring and operation of the pump and flow temperature sensor, replace part/s if necessary. |
| Flow sensor fault | E2 |
350 |
Flow temperature sensor shorted |
▶ Check: – Sensor harness and connector. – Operation, replace if necessary. |
| Flow sensor fault | E2 |
351 |
Flow temperature sensor disconnected |
▶ Check: – Sensor harness and connector. – Operation, replace if necessary. |
| Gas valve fault | FA |
306 |
Ionisation detected after the gas valve closed. |
▶ Inspect the ionization probe, replace if necessary. ▶ Check that the condensate is discharging. ▶ Check 230Vac across blue & orange wires to the coils. – Replace gas valve if no voltage. – Replace control box if there is voltage. |
| Ignition/Ionisation fault | EA |
227 |
No ionisation detected after ignition |
▶ Check: – The dynamic gas pressure. – The flue system for restrictions. – The gas-air ratio (if possible). – Connectors of the ignition unit. – Ignition and ionisation current. – Ignition unit for damage or wear, replace if necessary. – Gas valve operation. – Appliance for contamination. |
| Ignition/Ionisation fault | F7 |
228 |
8 Ionisation current detected before burner-start |
▶ Check: – Condition of the ionisation probe. – Connection of the ionisation probe. – Condensate is discharging correctly. – Replace parts if necessary. |
| Ignition/Ionisation fault | EA |
229 |
Loss of ionisation signal during operation |
▶ Check: – The gas-air ratio. – The dynamic gas. – Wiring and connection of flame probe. – Replace flame probe necessary. |
| Ignition/Ionisation fault | EA |
261 |
HCM potentially defective |
▶ Reset the appliance. If continues to go to this error ▶ Check: – HCM is inserted properly. – HCM number. ▶ Contact technical helpline. |
| Internal error | 9U |
233 |
Control box or HCM is defective or loose |
▶ Check: – HCM is inserted properly. – Replace HCM if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | C4 |
237 |
Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Replace HCM if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | F0 |
238 |
Gas valve or control box error |
▶ Check: – Gas valve coils: 230V ac across blue & orange wires. – Replace gas valve if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | F0 |
239 |
Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Replace HCM if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | F0 |
242-256 |
Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error | b7 | 257 | Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error |
F0 EH |
258 258 |
Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error | F1 | 259 | Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error | F0 | 262 | Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error | F1 | 263 | Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Contact technical helpline. |
| Internal error | F0 | 272 | Control box or the HCM is defective. |
▶ Check: – HCM is inserted properly. – Replace HCM if necessary. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | F0 | 280 | Control box is defective. |
▶ Check: – HCM is inserted properly. – Connections of the control box. ▶ Replace control box if necessary. |
| Internal error | F0 | 290 | Control box is defective, (Analogue / Digital converter reference error). |
▶ Check: – HCM is inserted properly. – Connections of the burner control. ▶ Replace burner control if necessary. |
| Internal error | 328 | Internal error (Mains voltage / frequency may be inconsistent) | ▶ Check the voltage and frequency. | |
| 235 | Incompatible HCM software version |
Revised HCM software requires latest version of control box to operate correctly ▶ Replace the control box with the latest software. On the barcode label of the burner control the software version is indicated. |
||
| 356 | Low mains voltage, (the voltage may be interrupted or inconsistent). | ▶ Check mains voltage. | ||
| 360 | HCM invalid |
The inserted HCM does not correspond with the control box. HCM must be within the same appliance type. ▶ Check the correct HCM is fitted. – HCM identification number found in Technical data table. |
||
| A8 | 361 | HCM invalid |
The inserted HCM does not correspond with the control box or HMI type. ▶ Contact technical helpline. |
|
| 363 | Ionisation measuring fault | ▶ Check earth harness’s and connections | ||
| 356 | Low mains voltage, (the voltage may be interrupted or inconsistent). | ▶ Check mains voltage. | ||
| CC | 800 | Outdoor sensor defect (available when accessary outdoor sensor is connected) |
▶ Check: – Sensor harness and connector. – Operation, replace if necessary. |
|
| Pump error | A1 | 281 | Pump stuck or running dry |
▶ Check: – Primary system water pressure. – For air in the system. – Circulation within heating system. – Wiring and operation of the pump, replace if necessary. |
| Temperature fault | E9 | 224 | Flue or high limit thermostat activated (safety circuit) |
▶ Check: – Flue & high limit thermostat harness and connector. – Operation, replace if necessary. – Circulation within heating system. – Burner gasket for leakage of flue gasses, replace if necessary. – Heat exchanger for debris. – Air-gas ratio. |
| Temperature fault | D4 | 341 | Primary flow temperatures rising too fast |
▶ Check: – Primary system water pressure. – For air in the system. – Circulation within heating system. – Wiring and operation of the pump and the respective sensors, replace if necessary. |