Bertelli & Partners Cointra Optimax OM PCB Ref. 9160123

If your boiler does not start, locks out, or shows erratic behavior, a technical diagnosis must confirm if you need the Bertelli & Partners Cointra Optimax OM PCB (control board) Ref. 9160123. This control board manages the ignition, burner modulation, pump, and safety features of the boiler. Users may notice faults such as E00, E70, E71, or E72 when this part fails. It is compatible with Cointra Optimax OM models, such as the Optimax OM 21 EI and the Optimax OM 25 EI, among others. A technician must confirm through diagnosis if replacement is necessary when these symptoms or operational faults occur.

Type of part: PCBs (control boards)
Status: Refurbished
Catalogue reference: 9160123
Warranty: 1 year

VAT included Stock · 3 units

Compatibility

Cointra boilers compatible with reference 9160123

PCB with reference 9160123. Two confirmed compatibilities: Optimax OM 21 EI and Optimax OM 25 EI.

Proven compatibility

Boiler model	Family	Verification
Cointra Optimax OM 21 EI	Cointra Optimax OM	Contrasted
Cointra Optimax OM 25 EI	Cointra Optimax OM	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. 9160123 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 9160123. 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 9160123

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 doesn't turn on at all, neither the indicators nor the display, as if it's not receiving power.
Cause: The PCB distributes power to the entire system; if its input stage fails, the whole unit does not respond.
Before replacing it, check that 230V is reaching the boiler and that the main fuse and the fuse for the PCB are in good condition.
02
The boiler attempts to ignite, you can hear the spark, and it stops after a few seconds without producing a flame.
Cause: The PCB does not correctly interpret the flame detection signal and locks the boiler for safety.
Note the fault code displayed on the screen; if it indicates a problem with the electrode or the pressure switch, the fault may not be in the PCB.
03
The boiler control is unresponsive: it neither increases nor decreases the temperature, nor does it turn on or off.
Cause: The microprocessor on the PCB has stopped processing the commands it receives.
Check that the connector from the control to the PCB is properly seated and that there are no bent pins before replacing anything.

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 make sure it is functioning properly.
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 be due to a fault in the PCB. Check the communication between units and the status of the board.
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 be caused by an issue with the PCB. Check the status of the SLAVEs and the board.
E72	Cascade alarm (no communication with MASTER)	A cascade alarm has been triggered, indicating that a SLAVE cannot communicate with the MASTER. This may be due to a fault in the PCB. Check the communication between units and the status of 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.

Technical data

Data sheet for the PCB Cointra 9160123

Catalogue reference: 9160123
Uniclima internal SKU: PECOOM
Brand: Cointra
Type of part: PCBs (control boards)
Units in stock: 3 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: Bertelli & Partners

Documentation

Manuals and technical documentation

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

Frequently Asked Questions

Frequently asked questions about the PCB 9160123

Who manufactures the PCB for the Cointra Optimax OM 21 EI?

Bertelli & Partners, according to the circuit's silkscreen and the transformer's label, where the name appears printed twice.

Is this PCB also suitable for the Cointra Optimax OM 25 EI?

Yes, it is compatible with the OM 21 EI and OM 25 EI models from the Optimax series.

When should this PCB for the Cointra Optimax be replaced?

The technical diagnosis must confirm that it is necessary to replace it, even when the electronic control of the boiler is damaged or stops functioning.

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1-year warranty reviewed and tested

14-day return uninstalled parts

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Bertelli & Partners Cointra Optimax OM PCB Ref. 9160123