What does the code COM mean in Beretta?

Loss of communication from the appliance PCB (more than 30 s). Fault in the main board or its interface prevents communication with display/keyboard or BUS; check voltages on the board (5/12/24 V), wiring, and communication connectors; if it persists, reprogram or replace the PCB.

What does fault code E056 mean on Beretta?

Absence of communication with the microprocessor board. Fault in the control board (microcontroller/PCB) or its internal bus; check power supply and connectors on the PCB, and if communication is not restored, reprogram or replace the board.

What does the FWER code mean in Beretta?

Incompatible firmware version. After replacing the PCB, the firmware of the PCB is not compatible with that of the interface/system; verify versions and load the correct firmware or install a PCB with the appropriate revision.

RefurbishedBeretta PCBs (control boards)

PCB Beretta Sylber Style Basic 25 S Ref. 20177589

Name: PCB Beretta Sylber Style Basic 25 S Ref. 20177589
Brand: Beretta
SKU: PLABRTA223X
Price: 100 EUR
Availability: InStock

100 €VAT includedIn stock · 1 unit

PCB (control board): refurbished spare part that controls the ignition, modulation, and safety features of the boiler. Useful if the boiler does not ignite, locks out, or the display is unresponsive. Reference 20177589. Includes a one-year warranty and delivery within 2–4 working days in the EU.

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Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: 20177589
Brand: Beretta
Type of part: PCBs (control boards)
Available units: 1 unit in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

Code	What does it mean?	Cause and diagnosis (this part)
COM	Loss of communication with the appliance PCB (more than 30 s).	Fault in the main PCB or its interface prevents communication with display/keyboard or BUS; check voltages on the PCB (5/12/24 V), wiring, and communication connectors; if it persists, reprogram or replace the PCB.
E056	Lack of communication with the microprocessor board.	Fault in the control board (microcontroller/PCB) or its internal bus; check power supply and connectors on the PCB, and if communication is not restored, reprogram or replace the board.
FWER	Incompatible firmware version.	After replacing the PCB, the firmware of the PCB is not compatible with that of the interface/system; verify versions and load the correct firmware or install a PCB with the appropriate revision.