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