Cointra E20L PCB
The Cointra E20L PCB is the component responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, become locked, or exhibit erratic behavior. The user may notice issues such as the appearance of fault codes E00, E70, E71, or E72. This board is compatible with several models from the Cointra E20L range, among others. A technician must confirm through diagnosis whether it needs to be replaced when these symptoms or fault codes occur.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 7683
- Warranty
- 1 year
Cointra boilers compatible with reference 7683
PCB with reference 7683. Six confirmed compatibilities: E20L and E20 L.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Cointra E20L | Cointra E20L | Contrasted |
| Cointra E20 L | Cointra E20L | Contrasted |
| Cointra E20 L/N | Cointra E20L | Contrasted |
| Cointra E20LN | Cointra E20L | Contrasted |
| Cointra E20/20 L | Cointra E20L | Contrasted |
| Cointra E20/20LN | Cointra E20L | 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. 7683 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 7683. 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 7683
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 tries to ignite, you can hear clicks, but the spark does not come out.
Cause: The ignition transformer on the PCB does not generate the necessary voltage for the arc.
With the boiler turned off and without power, check that the high voltage cable to the electrode is not loose and that the electrode is not broken before replacing the complete PCB.
- 02
A dry click is heard on the PCB when requesting heat, but the boiler does not respond.
Cause: The internal relay that activates the power supply to the components is stuck or does not close the contact properly.
Check if that click is always heard when requesting heat, because if it is never heard, the problem may be earlier, in the electrical supply.
- 03
The boiler turns on and off by itself repeatedly, without any apparent reason.
Cause: A fault in the PCB causes it to lose control of the ignition cycle midway through the process.
Note if the cut-off always occurs at the same point in the cycle, as this helps distinguish a PCB fault from a sensor fault.
- 04
The boiler is not receiving power, neither the clock nor the display turn on.
Cause: The PCB does not distribute the main power to the rest of the circuit.
Check the main fuse of the house and the fuse of the PCB before replacing it.
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 the PCB and the SLAVES. |
| 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 PCB and the SLAVES. |
| 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 the PCB and the MASTER. |
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 Cointra 7683 PCB.
- Catalogue reference
- 7683
- Uniclima internal SKU
- PLTCE20L
- Brand
- Cointra
- 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.
- Transformer manufacturer
- Crovisa
- Transformer code
- 481D030
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Cointra E20 L Manual (PDF) Document © Cointra, provided as a technical reference.
Frequently asked questions about the PCB 7683
Is this PCB suitable for the Cointra E20L boiler?
What code does the transformer on this PCB have?
What other components are mounted on the PCB besides the Crovisa transformer?
Spare parts related to Cointra Cointra E20L
