Name: Sime Brava DGT HE25 PCB Ref. 6301485
Brand: Sime
SKU: PLSI086
Price: 90 EUR
Availability: OutOfStock

Question 1

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

Accepted Answer

Verify the reference 6301485 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a SIT 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

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Question 7

What does fault code AL 06 mean on Sime?

Accepted Answer

The flame is not detected. The PCB does not 'see' the ionisation signal due to a fault in the detection circuit on the PCB (track/op-amp/ground) or erratic reading. Verify by measuring ionisation microamps and tracing from the electrode to the PCB input; if the signal is correct and AL06 persists, replace/repair the PCB.

Question 8

What does fault code AL 08 mean in Sime?

Accepted Answer

Flame detection circuit fault (parasitic flame). A defect in the detection circuit of the PCB causes a reading of flame presence when it shouldn't. Confirm by isolating electrode/wiring and, if it persists with correct line and ground, the fault is with the PCB (ionization stage); repair or replace.

Question 9

What does fault code AL 77 mean in Sime?

Accepted Answer

Maximum/minimum absolute limits error of current EV2 SGV. The control/reading stage of the gas valve on the PCB detects current out of range; it could be the driver/measurement on the board. Check the coil and consumption of the valve; if correct, the cause is the board (driver or reading) and it must be replaced.

Question 10

What does fault code AL 78 mean on Sime?

Accepted Answer

Upper current limit error EV2 SGV. Overreading/excessive command from the valve driver on the PCB. Check the actual consumption of EV2 and wiring; if normal and AL78 persists, the fault is in the control/measurement channel on the board.

Question 11

What does fault code AL 79 mean in Sime?

Accepted Answer

Lower current limit error EV2 SGV. The PCB does not detect the expected minimum current in the valve (defective driver/reading). Measure EV2 current; if it is within range and the error persists, the PCB is faulty.

Question 12

What does the fault code AL 80 mean on Sime?

Accepted Answer

Fault in the control logic line of the valve (or damaged valve cable). In addition to wiring, Sime documents that the PCB can be the cause (logic stage/driver). Check continuity from the harness to the valve; if OK, the fault is in the PCB and requires replacement.

Question 13

What does fault code AL 88 mean on Sime?

Accepted Answer

Internal error (component protection on the PCB). Internal fault detected by the PCB itself (hardware protection). Verification: reset and basic checks; if it reappears, the action prescribed by Sime is to replace the PCB.

Question 14

What does fault code AL 95 mean in Sime?

Accepted Answer

Error due to micro interruptions in the flame signal. Brief interferences/drops that the ionisation stage of the PCB interprets as flame losses; if the electrode, grounding, and power supply are correct, the cause is the PCB itself. Check with a microammeter and network stability; replace the PCB if it persists.

Question 15

What does fault code AL 98 mean on Sime?

Accepted Answer

Software error, board startup. Fault in the boot/software of the PCB. It is not an installation issue; the manufacturer's indication is management by SAT and replacement of the board if it does not start after reset/configuration.

Question 16

What does fault code AL 99 mean on Sime?

Accepted Answer

Generic PCB error. PCB self-diagnosis detects a non-specific anomaly. Confirm power supply/cables; if there are no external causes, replace the PCB.

Code	What does it mean?	Cause and diagnosis (this part)
AL 06	Flame not detected.	The PCB does not 'see' the ionisation signal due to a fault in the detection circuit on the PCB (track/op-amp/ground) or erratic reading. Verify by measuring ionisation microamps and tracing from electrode to the PCB input; if the signal is correct and AL06 persists, replace/repair the PCB.
AL 08	Flame detection circuit fault (parasitic flame).	Fault in the detection circuit of the PCB causes a reading of flame present when it should not be. Confirm by isolating electrode/wiring and, if it persists with correct line and ground, the fault is with the PCB (ionization stage); repair or replace.
AL 77	Maximum/minimum absolute limits error of current EV2 SGV.	The control/reading stage of the gas valve on the PCB detects current out of range; it could be the driver/measurement on the board. Check the coil and consumption of the valve; if correct, the cause is the board (driver or reading) and it must be replaced.
AL 78	Upper current limit error EV2 SGV.	Overreading/excessive command of the valve driver from the PCB. Check the actual consumption of EV2 and wiring; if it is normal and AL78 persists, the fault is in the control/measurement channel on the board.
AL 79	EV2 SGV lower current limit error.	The PCB does not detect the expected minimum current in the valve (defective driver/reading). Measure current EV2; if it is within range and the error persists, the PCB is faulty.
AL 80	Fault in the control line logic of the valve (or damaged valve cable).	In addition to wiring, Sime documents that the PCB can be the cause (logic stage/driver). Check continuity from the harness to the gas valve; if OK, the fault is in the PCB and requires replacement.
AL 88	Internal error (protection of a component on the PCB).	Internal fault detected by the PCB itself (hardware protection). Verification: reset and basic checks; if it reappears, the action prescribed by Sime is to replace the PCB.
AL 95	Fault due to micro interruptions in the flame signal.	Brief interferences/drops that the ionisation stage of the PCB interprets as flame losses; if the electrode, ground, and power supply are correct, the cause is the PCB itself. Check with a microammeter and network stability; replace the PCB if it persists.
AL 98	Software error, PCB start-up.	Fault in the boot/software of the PCB. It is not an installation problem; the manufacturer's indication is management by SAT and replacement of the PCB if it does not start after reset/configuration.
AL 99	Generic PCB fault.	The PCB self-diagnosis detects a non-specific anomaly. Confirm power supply/cables; if there are no external causes, replace the PCB.

Sime Brava DGT HE25 PCB Ref. 6301485

Key Data

Sime Brava DGT HE

Sime Open DGT EV HE

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