PCB Cointra Supra SP 27 EI Honeywell Ref. 51BP2783
Control PCB for Cointra Supra SP 27 EI boilers. The actual manufacturer, printed on the PCB itself, is Honeywell: it has the code TYPE 5WC0L01 and the CE marking CE0051GP2765. This is the component that governs the operation of the boiler and should be checked when the control electronics fail. Replacement requires a technical diagnosis.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 51BP2783
- Warranty
- 1 year
Cointra boilers compatible with reference 51BP2783
PCB with reference 51BP2783. A proven compatibility: Supra SP 27 EI.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Cointra Supra SP 27 EI | Cointra Supra SP | 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 the ref. 51BP2783 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 51BP2783. 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 51BP2783
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
No pilot light or display turns on, even though there is power in the house.
Cause: Without the control board, there is no power supply for the rest of the boiler's electronics.
Check that the main switch of the boiler is in the ON position and that the electrical panel has not tripped.
- 02
The hot water works but the heating does not, or vice versa.
Cause: The PCB manages the two functions separately; one output can fail without affecting the other.
Isolate the faulty function (test only domestic hot water and then only heating) to confirm that it is not an issue with a radiator or a specific valve.
- 03
The boiler starts and stops by itself in short cycles, without any apparent reason.
Cause: A relay on the PCB that switches incorrectly causes starts and stops that do not correspond to the actual demand.
First, rule out that there is no stuck heat call in the thermostat before replacing the PCB.
- 04
The fuse blows or the boiler shuts down as soon as power is supplied.
Cause: A short circuit on the PCB causes the protection to trip as soon as power is supplied.
Check if the same fuse or circuit breaker trips with other devices as well, to rule out an installation issue rather than a problem with the PCB.
Fault codes Cointra that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| E00 | No communication with the display | The boiler cannot communicate with the control panel. This may be due to a fault in the PCB. Check the connections of the board and its condition. |
| E70 | Cascade alarm (without communication with SLAVEs) | A cascade alarm has been triggered, indicating that the MASTER cannot communicate with one of the SLAVES. This may affect the system's performance. Check the communication between units and the status of the PCB. |
| E71 | Cascade alarm (alarm on one of the SLAVES) | A cascade alarm has been triggered, indicating that there is an alarm in one of the SLAVES. This may affect the operation of the system. Check the status of the SLAVES and the PCB. |
| E72 | Cascade alarm (no communication with MASTER) | A cascade alarm has been triggered, indicating that a SLAVE cannot communicate with the MASTER. This may affect the system's performance. Check the communication between units and the status of 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 PCB Cointra 51BP2783
- Catalogue reference
- 51BP2783
- Uniclima internal SKU
- PLCSP27EI
- Brand
- Cointra
- 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.
- Manufacturer (marking on the plate)
- Honeywell
- Type code
- TYPE 5WC0L01
- CE marking
- CE0051GP2765
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Cointra Supra SP 27 EI Manual (PDF) Document © Cointra, provided as a technical reference.
Frequently asked questions about the PCB 51BP2783
Who actually manufactures the PCB of the Cointra Supra SP 27 EI, Cointra or an external supplier?
Is this PCB marked TYPE 5WC0L01 the one used in the Cointra Supra SP 27 EI?
What function does this PCB serve in the Cointra Supra SP 27 EI?
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