A45 Boiler expansion communication alarm warns that boiler expansion board is not detected on the bus.
As consequence unit open C6, stop any function.
This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions.
Description
Boiler expansion board is not recognized on the bus system.
Warning
Direct steam injection have not this PCB a wrong setting can generate this message check from Oven Model menu.
If needed possible to temporarily deactivate the boiler and make the unit in direct injection.
Remember to deactivate the water pressure switch form Oven Model menu
Reset
L’error reset automatically reset when expansion board is detected or deactivated.
Check
Perform following checks:
- Check from Oven model proper unit configuration; if not present deactivate the boiler.
- Check bus connections - RJ45 plugs.
- Check power supply to boiler expansion board (230V) between pin 47 and pin 48 - 55