Warning
Maintenance may only be performed by a qualified service and maintenance engineer.
Table 10.2 Displayed errors (Sheet 4 of 10)
is
Code + Description | Possible cause | Solution | Remark | |
|
|
|
|
|
F03 (lock out error) | Damaged wiring / | 1. | Check the wiring between the pressure switch and the | If the error cannot be resolved or is persistent, contact your |
The pressure switch | Open circuit |
| controller. | installer. |
|
|
| To replace the necessary parts, you must contact your installer. | |
fails to work correctly. |
| 2. | If necessary, replace the wiring. | |
|
|
|
|
|
| Pressure switch not | 1. | Check the running speed of the fan. See ’8.7.4 Displaying |
|
| closing. |
| appliance specifications’. |
|
|
| 2. | Check that the hoses on the pressure switch and the air supply |
|
|
|
| hose between fan and burner are correctly fitted. Refit these if |
|
|
|
| necessary. |
|
|
| 3. | Check the hoses on the pressure switch and the air supply |
|
|
|
| hose between fan and burner for cracks. If necessary, replace |
|
|
|
| the hoses. |
|
|
| 4. | Check whether the flue gas discharge is compliant with |
|
|
|
| Table 3.7. |
|
|
| 5. | Check for blockage in the flue gas discharge. Remove any |
|
|
|
| blockage that may be present. |
|
|
| 6. | Check for blockage in the condensation water discharge. |
|
|
|
| Remove any blockage that may be present. |
|
|
| 7. | Measure the pressure differential across the pressure switch. |
|
|
|
| See Table 12.1. If there is insufficient pressure differential, |
|
|
|
| clean the heat exchanger. If the pressure differential is |
|
|
|
| acceptable, check that the pressure switch is closing, using a |
|
|
|
| multimeter. |
|
|
|
|
|
|
Release R.1.3 UK | 76 |
