Name: Baxi Roca PCB RS 20 20 F Ref. 122121410
Brand: Baxi Roca
SKU: PLCRCRS20
Price: 85 EUR
Availability: InStock

Question 1

How do I know if this PCB is for my boiler?

Accepted Answer

Verify the reference 122121410 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.

Question 2

What is it used for?

Accepted Answer

The PCB controls the ignition, modulation, sensor readings, and safety features of the boiler.

Question 3

Is the boiler not igniting, locking out, or is the control board unresponsive?

Accepted Answer

After ruling out mains voltage, fuse, and connectors, a damaged PCB causes lockouts, blackouts, or erratic display. Repair the external cause before installing the new one.

Question 4

Which models is it suitable for?

Accepted Answer

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Question 5

Installation and recommendations

Accepted Answer

After installation, a technician must adjust the service parameters (type of gas, power settings) and check combustion and safety features.

Question 6

What does refurbished mean and what coverage does it have?

Accepted Answer

Pieza desmontada de una caldera fuera de servicio, revisada y probada. Incluye 1 año de garantía y 14 días de devolución. Delivery time and cost are shown at checkout for the destination country.

Question 7

What does the code 60-90 mean in Baxi Roca?

Accepted Answer

Flame relay is not working properly or is stuck/off. The flame relay is integrated into the PCB 122121410; if it gets stuck or does not switch, the PCB does not validate the ionisation signal and locks out. Check if the PCB energises the relay and if it switches by measuring voltage/continuity during demand; if it does not operate with correct inputs, replace the PCB.

Question 8

What does the code 50-70-90 mean in Baxi Roca?

Accepted Answer

Fault in the safety relay, does not close after demand. The safety relay is part of the PCB 122121410; if its contacts do not close, the safety chain is not enabled and the boiler goes into lockout. Check relay excitation and contact continuity on the PCB during demand; if it does not switch with correct input signals, the PCB is faulty.

Question 9

What does the fault code 40-60-70-90 mean in Baxi Roca?

Accepted Answer

Safety relay, very long ignition timing. The ignition timing and safety relay are controlled by the PCB 122121410; a fault in the relay/timer on the PCB causes the time to exceed and lock. Check the control board's command to the relay and spark/validation times; if the relay does not release in time with correct input conditions, replace the PCB.

Code	What does it mean?	Cause and diagnosis (this part)
60-90	Flame relay is not working properly or is stuck/off.	The flame relay is integrated into the PCB 122121410; if it sticks or does not switch, the PCB does not validate the ionisation signal and locks out. Check if the PCB energises the relay and if it switches by measuring voltage/continuity during demand; if it does not operate with correct inputs, replace the PCB.
50-70-90	Fault in the safety relay, does not close after demand.	The safety relay is part of the PCB 122121410; if its contacts do not close, the safety chain is not enabled and the boiler goes into lockout. Check the relay excitation and contact continuity on the PCB during demand; if it does not switch with correct input signals, the PCB is faulty.
40-60-70-90	Safety relay, very long ignition timing.	The ignition timing and safety relay are governed by the PCB 122121410; a fault in the relay/timer on the PCB causes the time to exceed and lock out. Check the control board to relay command and spark/validation times; if the relay does not release in time with correct input conditions, replace the PCB.

Baxi Roca PCB RS 20 20 F Ref. 122121410

Key Data

RS 20/20

Spare Parts Related Boiler RS 20 20 F