Main PCB EPIQ Saunier Duval Isofast C28E - Ref. 05724800
Main PCB EPIQ for Saunier Duval Isofast and Isomax boilers C28E, C35E, F28E, F35E, and C28E NOX (also Glow-worm XtraFast 96/120). Commercial reference 05724800, manufacturing code 900000460ed02, revision 105302 H. It includes Saunier Duval transformer SF 61/22G3 (EN 60742), 125mA T fuse, and microcontroller with Philips chip. The replacement requires first confirming the fault of the part through technical diagnosis, even when the board fails and the boiler stops responding to the control panel.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 05724800
- Warranty
- 1 year
Saunier Duval boilers compatible with reference 05724800
PCB with reference 05724800. Eight confirmed compatibilities: C 28 E and C 28 E NOx.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 28 E | Isofast | Contrasted |
| Saunier Duval C 28 E NOx | Isofast | Contrasted |
| Saunier Duval F 28 E | Isofast | Contrasted |
| Saunier Duval C 35 E | Isofast | Contrasted |
| Saunier Duval F 35 E | Isofast | Contrasted |
| Saunier Duval C 24 E V | Isofast | Contrasted |
| Saunier Duval C 28 E | Isomax | Contrasted |
| Saunier Duval F 28 E | Isomax | 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. 05724800 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 05724800. 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 05724800
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 turn on or respond to any button on the panel.
Cause: A microcontroller fault on the PCB prevents processing commands and starting the boiler.
Disconnect the main power for one or two minutes and then reconnect it. If the fault persists after the reset, it points more towards the PCB.
- 02
An error code appears on the display that doesn't match any other component already checked.
Cause: The PCB generates self-diagnostic codes and can indicate an internal fault once sensors and the gas valve have been ruled out.
Note the exact code displayed by the boiler. It is used to confirm if it truly indicates a fault with the PCB before purchasing it.
- 03
The PCB fails intermittently, it works for a few days and then stops.
Cause: A fault in the microcontroller or the internal transformer can cause irregular interruptions before completely failing.
Check the fuse on the PCB. A blown fuse indicates an external overload and not a fault inherent to the electronics.
- 04
The boiler loses its configuration or saved settings after a power outage.
Cause: A fault in the PCB memory does not retain the programmed parameters.
Reprogram the settings after the power cut and check if they hold for a few days before considering the PCB defective.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 13 | Main printed circuit board fault. | The main PCB is faulty. Check auxiliary voltages (5/12 VDC) and connectors of the PCB; if the power supply and wiring/UI are correct and the board does not deliver voltages or shows damage/continuous reset, replace the PCB. |
| 20 | Communication fault/incompatible interface with the main PCB. | The main PCB is incompatible or there is a communication failure with the user interface (coding/DSN or e‑Bus). Verify product code and compatibility UI↔PCB; if the fault persists with the correct UI, the cause is the PCB. |
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 Saunier Duval 05724800 PCB.
- Catalogue reference
- 05724800
- Uniclima internal SKU
- RP SDI-C28E
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 5 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.
- Manufacturer
- EPIQ
- PCB code
- 900000460ed02
- Review code
- 105302 H
- Fuse
- 125 mA T (timed)
- Transformer
- Saunier Duval SF 61/22G3, compliant with EN 60742
- Microcontroller
- Philips printed circuit chip
- Reference and compatibility (external sources)
- 05724800 - Main PCB Isofast/Isomax C28E, C35E, F28E, F35E, C28E NOX
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval F 28 E Manual (PDF) Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 05724800
Is this EPIQ PCB suitable for the Saunier Duval Isofast C28E?
Why doesn't the PCB of the Isofast C28E have the code 05724800 printed on it?
Who manufactures the main PCB for the Saunier Duval Isofast C28E?
What transformer does the EPIQ PCB of the Isomax C28E use?
What fuse and microcontroller does the EPIQ PCB of the Isofast C28E have?
When should this PCB be replaced in the Isofast C28E?
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