| Fault Description | System Behaviour |
|---|---|
| 208 | The boiler is in chimney sweep mode |
| 200 | The boiler is in heating mode |
| 201 | The boiler is in domestic hot water (DHW) mode |
| 202 | The boiler is waiting – there was a heat demand from the on off or modulating control |
| 203 | The boiler is on standby |
| 204 | The boiler is waiting – the actual temperature is higher than the calculated or selected boiler temperature |
| 212 | The temperature recorded by the flow temperature sensor or the safety sensor is rising too quickly |
| 226 | Diagnosis tool was connected and is now locked out |
| 260 | The flow temperature sensor is not detecting a rise in temperature following a burner start |
| 265 | The boiler is waiting in response to a heat demand – the boiler regularly switches to partial load |
| 268 | Component test phase |
| 270 | The boiler is modulating upwards |
| 283 | The boiler is preparing for a burner start – the fan and pump are activated |
| 284 | The gas valve is switched |
| 305 | The boiler is waiting for domestic hot water (DHW) operation to end |
| 235 | The KIM (boiler identification module) is too new for the burner control unit |
| 360 | The KIM that has been fitted is not compatible with the burner control unit |
| 9A 361 | The burner control unit that has been fitted is not compatible with the KIM (boiler identification module) |
| 9U 233 | The burner control unit or KIM (boiler identification module) is faulty |
| A3 317 | Short circuit in the flue gas temperature sensor contacts |
| B7 257 | The burner control unit or the KIM (boiler identification module) is faulty |
| C1 264 | No control signal or power supply to the fan during operation |
| C4 273 | The boiler was switched off for a maximum of 2 minutes because it had been operating continuously for more than 24 hours |
| C6 215 | The fan speed is too high |
| C6 216 | The fan speed is too low |
| C7 214 | The fan does not run during the start phase |
| C7 217 | The fan speed is irregular when starting up |
| CE 207 | Water pressure is too low |
| CE 266 | Pump test failed |
| D1 240 | The contacts of the boiler return temperature sensor have been short circuited |
| D1 241 | The contacts of the boiler return temperature sensor have been interrupted |
| D3 232 | The external switching contact has opened |
| D4 213 | The actual temperature recorded by the flow temperature sensor or return temperature sensor is rising too quickly |
| D4 271 | Actual temperature differential between flow and safety temperature sensor is too high |
| D4 286 | The boiler return temperature sensor has detected a return temperature higher than 105°c |
| E2 222 | Short circuit in the flow temperature sensor contacts |
| E2 223 | The flow temperature sensor contacts have been interrupted |
| E5 218 | The temperature captured by the flow temperature sensor exceeded 105°c |
| E9 210 | The temperature measured by the flue gas sensor is too high and is open |
| E9 219 | The safety temperature sensor has captured a temperature in excess of 105°C |
| E9 220 | The contacts for the safety temperature sensor have shorted or the safety temperature sensor has detected a temperature higher than 130°c |
| E9 224 | The contacts of the safety temperature sensor have been interrupted |
| E9 276 | The temperature flow sensor has measured a temperature in excess of 95°c |
| E9 277 | The safety temperature sensor has measured temperature in excess of 95°c |
| E9 285 | The boiler return temperature sensor has measured a temperature higher than 95°c |
| E9 318 | The flue gas temperature sensor contacts have been interrupted |
| EA 227 | An insufficient ionisation current was measured following ignition of the burner |
| EA 229 | The ionisation current detected by the system during the burning phase was insufficient |
| EA 234 | The contacts of the gas valve have been interrupted |
| EA 261 | The burner control unit is faulty |
| EA 269 | The ignition device has been activated for too long |
| F0 238 | The burner control unit KIM (boiler identification module) is faulty |
| F0 239 | The burner control unit KIM (boiler identification module) has an error. Cabling might have poor contact breaks and pinching or the plug and wiring of the burner control unit needs checking, also check the operating characteristics of the boiler by replacing the burner control unit. |
| F0 242, F0 243. F0 244. F0 245, F0 246. F0 247, F0 248, F0 249, F0 250, F0 251, F0 252, F0 253, F0 255, F0 259, F0 263, F0 267, F0 272 | The burner control unit (KIM) is faulty – the wiring of the burner control unit needs checking, also check the operating characteristics of the boiler by replacing the burner control unit. |
| F0 278 | The sensor test has failed – cabling and plug sensors need checking |
| F0 279 | The burner control unit, or KIM, is faulty – control unit may need replacing |
| F0 280 | The burner control unit is faulty |
| F0 287 | The burner control unit, or KIM, has an error |
| F0 290 | The burner control unit, or KIM, is faulty |
| F7 228 | An ionisation current was measured before the burner started |
| F7 328 | A brief power failure has occurred |
| FA 306 | An ionisation current was measured after the burner went out |
| FD 231 | The mains voltage was interrupted during an interlocking fault |
| EC 256 | The burner control unit has an error |
| EH 258 | The burner control unit is faulty – check the plug and wiring of the burner control unit. |
| H07 | The current water pressure is too low, limiting the performance in heat mode as well as domestic hot water (DHW) mode |
| HrE | The boiler keeps resetting |
| rE | The boiler resets |
We provide specialized winterization services to safeguard your pool during the off-season, and when spring arrives, we handle the thorough opening process.
We are fully gas safe registered and DBS checked.
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