Honeywell Ignition PCB - Baxi Roca Eco 240 FI Ref. JJJ005653890

PCB manufactured by Honeywell, with integrated ignition transformer (Electron-Coil A048B5033FA), installed in Baxi boilers from the Eco and Luna ranges. The label includes type SM0E01, CE marking 0051BP2590, and Baxi code 56.6955.5. It is replaced if the boiler does not ignite, locks during startup, or fails intermittently.

Type of part: PCBs (control boards)
Status: Refurbished
Catalogue reference: JJJ005653890
Warranty: 1 year

VAT included Stock · 2 units

Compatibility

Baxi Roca boilers compatible with reference JJJ005653890

PCB with reference JJJ005653890. Three confirmed compatibilities: Eco 240 Fi and Eco 240 i.

Proven compatibility

Boiler model	Family	Verification
Baxi Roca Eco 240 Fi	Baxi Eco	Contrasted
Baxi Roca Eco 240 i	Baxi Eco	Contrasted
Baxi Roca Eco 1.240 Fi	Baxi Eco	Contrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

Guide

How to check if ref. JJJ005653890 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

Find the reference printed on the installed part and check whether it matches the catalogue reference JJJ005653890. If it is not visible, do not identify the part from its shape alone.
Check the full boiler model on its data plate and look for it in the model associations on this page.
Compare the connections and physical body with the original part before installation.
If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Diagnosis and fault codes

Symptoms that require diagnosis on the PCB JJJ005653890

The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:

Common symptoms and faults

01
The boiler does not ignite and there is neither a spark visible nor audible in the burner.
Cause: If the PCB fails, it does not generate the spark needed to ignite the boiler.
With the boiler off and without gas, check if there is a spark at the electrode when the ignition command is given before replacing the PCB.
02
It gets stuck right when trying to start, time and time again.
Cause: The ignition circuit fails to confirm ignition within the safety time.
Check the electrode and the ignition cable for dirt, moisture, or poor connections before replacing the PCB.
03
Intermittent fault: sometimes it ignites properly and other times it does not.
Cause: The ignition transformer degrades with use and can fail intermittently.
Note if the fault occurs more with the boiler cold or after prolonged use: it helps to confirm the wear of the transformer.
04
There is a noticeable crackling or strange arcing noise near the PCB when trying to ignite.
Cause: A faulty ignition transformer can generate internal arcs before completely failing.
If you detect that noise, turn off the power and do not continue testing: visually inspect the PCB before deciding on the replacement.

Fault codes Baxi Roca that require diagnosis

Code	Fault	Technical checks
E01	Lockout - does not ignite	The ignition/modulation PCB may not generate a spark or correctly manage the ionisation signal, or it may not energise the gas valve. Check the spark/electrode, polarity, and voltage/order to the valve; if all peripherals are correct, the PCB JJJ005653890 is faulty.
E35	Parasite flame (flame error)	The flame detection circuit on the PCB interprets the presence of a flame with the burner off (moisture, poor grounding, or ionization amplifier fault). Check grounding/polarity, wiring, and electrode/ionization; if E35 persists with the electrode disconnected, the PCB JJJ005653890 is defective.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Technical data

Data sheet for the Baxi Roca PCB JJJ005653890

Catalogue reference: JJJ005653890
Uniclima internal SKU: PLBA142
Brand: Baxi Roca
Type of part: PCBs (control boards)
Units in stock: 2 units
Status: Refurbished
Warranty: 1 year
Shipping: Delivery time shown at checkout
Return: 14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Type (PCB): SM0E01
CE marking: CE0051BP2590
Honeywell software / date / code: Sw R181D, Date 0506, Cd. 56.6955.5
Baxi code (Cd.): 56.6955.5
Manufacturing date: 0506
Integrated ignition transformer: Electron-Coil (Erba, CO, Italy) A048B5033FA / B59880-C120-A70

Documentation

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

Baxi Roca Eco 240 i Manual (PDF) Document © Baxi Roca, provided as a technical reference.

Frequently Asked Questions

Frequently asked questions about the PCB JJJ005653890

Who manufactures the ignition PCB JJJ005653890 for the Baxi Eco 240 FI?

Honeywell, according to the logo visible on both sides of the PCB.

Is this PCB compatible with a Baxi Luna 310 FI?

Yes, the Luna 310 FI is on the list of compatible boilers, along with other models from the Eco and Luna ranges.

Does the PCB of the Baxi Eco have an integrated ignition transformer?

Yes, an Electron-Coil A048B5033FA.

What fault in the Baxi Eco 240 FI indicates that this PCB needs to be replaced?

That the boiler does not ignite, gets blocked during startup, or fails intermittently.

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Honeywell Ignition PCB - Baxi Roca Eco 240 FI Ref. JJJ005653890