Sime Brava Slim Low NOx 25 BF Control PCB Ref. 6324900
The control PCB of the Sime Brava Slim Low NOx 25 BF manages the ignition, burner modulation, pump, and safety features of the boiler. When it malfunctions, the boiler may fail to start, lock out, or operate erratically. This issue may be associated with faults such as ALL 88, ALL 98, or ALL 99. It is compatible with the models Brava Slim LN 25 BF, Brava Slim Low NOx 25, Brava Slim Low NOx 30, Brava Slim 25 BF, and Brava Slim 30 BF, among others. A technician must confirm through diagnosis whether replacement is necessary when these symptoms or faults are detected.
Sime boilers compatible with reference 6324900
PCB with reference 6324900. Five confirmed compatibilities: Brava Slim LN 25 BF and Brava Slim Low NOx 25.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Sime Brava Slim LN 25 BF | Brava Slim Low NOx (LN) BF | Contrasted |
| Sime Brava Slim Low NOx 25 | Brava Slim Low NOx (LN) BF | Contrasted |
| Sime Brava Slim Low NOx 30 | Brava Slim Low NOx (LN) BF | Contrasted |
| Sime Brava Slim 25 BF | Brava Slim BF | Contrasted |
| Sime Brava Slim 30 BF | Brava Slim BF | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. 6324900 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 6324900. 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.
Symptoms that require diagnosis on the PCB 6324900
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 does not respond to the controls.
Cause: The PCB is not operational, so the boiler is not receiving power or commands.
Check the main fuse and the power supply of the boiler before replacing the PCB; rule out the simplest things first.
- 02
An error code appears and the boiler locks up, even when turning it off and on again.
Cause: The PCB stops the cycle preventively upon detecting an incorrect signal, either due to a fault in itself or in an external component.
Identify the fault code before purchasing; it may indicate a problem with a specific sensor rather than with the PCB.
- 03
The circulation pump or the gas valve do not receive commands, even though the boiler needs heat.
Cause: The relay that controls that component on the PCB can fail in isolation.
Check that the connectors CN3, CN4, CN5, and CN6 are properly connected and free of corrosion before considering the PCB as faulty; a poor connection can mimic the same issue.
- 04
The room thermostat does not affect the operation of the boiler.
Cause: The heating demand input of the PCB may not be functioning, even though the rest of the boiler is operational.
Check the wiring of the thermostat and its batteries before replacing the PCB.
Sime fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| ALL 88 | Internal error (protection of a component on the PCB) | The PCB detects an internal protection condition due to hardware failure on the board itself. Check power supply, fuse, and voltages/regulators on the board; if it persists after a reset, replace the board. |
| ALL 98 | Software error, card start-up | PCB startup/firmware fault (microcontroller/flash or corrupted software). Check voltages and ground, attempt reset/calibration; if it reappears, replace the board. |
| ALL 99 | Generic fault of the card | Self-diagnosis of the PCB reports an unspecified generic fault on the board. Rule out peripherals in short circuit and power supply failures; if it persists, replace the board. |
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.
Data sheet for the Sime 6324900 PCB.
- Catalogue reference
- 6324900
- Uniclima internal SKU
- PLSI099
- Brand
- Sime
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- Silkscreened connectors
- CN3, CN4, CN5, CN6
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Sime Brava Slim LN 25 BF Manual (PDF)Document © Sime, provided as a technical reference.
Frequently asked questions about the PCB 6324900
Is this PCB suitable for a Sime Brava Slim 30 BF?
How do I check if this PCB is for my Brava Slim LN 25?
Is it also suitable for the Brava Slim Low Nox?
Spare parts related to Sime Brava Slim Low NOx (LN) BF
