A1 and fault indicator LED are flashing – Controlled characteristic pump has run dry
Step | Check | Action | |
---|---|---|---|
1. | System pressure below 1.2 bar | yes | â–¶ Power OFF the appliance â–¶ Check appliance and system for water leaks and repair as necessary. â–¶ Fill system, bleed and re-pressurise (see Installation Instructions). â–¶ Turn ON appliance A1? go to step 2 |
no: | go to step 2 | ||
2. | Pump seized or sticking? | yes | Free/release pump |
no: | go to step 3 | ||
3. | Audible bearing damage on pump | yes: | â–¶ Power OFF the appliance â–¶ Disconnect the boiler electrical connection. â–¶ Drain appliance. â–¶ Change the pump (see Installation Instructions). â–¶ Fill system, bleed and repressurise (see Installation Instructions). â–¶ Reconnect the boiler electrical connection. â–¶ Turn ON the appliance. |
no: | go to step 4 | ||
4. | Activate venting sequence | yes | â–¶ Select in the first service level, service function 2.C (Air Purge mode - see page X). â–¶ Select the value 1 and store. â–¶ Exit the service function. â–¶ The boiler vents for eight minutes. â–¶ Vent radiators manually. |