Manual Fagor FEB-20E UK ECOPLUS (page 22 of 23) (English)

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SELF DIAGNOSTIC FAULT CODES

The FEB-20E has a built in self diagnostic fault finding system incorporated into the P.C.B. Should a fault

develop on the boiler which could cause a situation liable for the operation of the boiler to become unsafe, then

the boiler will fail safe by locking-out which is displayed via the 'red neon' on the control panel.

The fault can be identified by the different sequences in which the 'red neon' flashes and the duration that the

neon stays illuminated. The electronic fail safe is also backed by a mechanical means of protection, should the

electronics fail to detect a fault. These mechanical forms of protection will protect and ensure the safe shut down

of the boiler.

The software protection built into the P.C.B. will run a system check on components which are essential to the

safe operation of the boiler. This occurs before any ignition sequence takes place. If any component is found to

be faulty or out of a predetermined range, then lock-out will be displayed.

Each fault code begins and finishes with the 'red neon' illuminated for 5 seconds, the relevant fault is then

indicated by the number of 1 second flashes which occur between the initial 5 second flash and the closing 5

second flash. These range from 0 - 12. Please be patient when counting the sequence as the correct identification

of the fault will save time on isolating and rectifying the problem.

Eg: Fault 6 water overheating would display the following sequence of the red neon;

5 seconds 1 sec 1 sec 1 sec 1 sec 1 sec 1 sec 5 seconds

N.B. The sequence repeats until either the reset button is depressed or the fault rectified. Some faults require the

component temperature to return within operating range before reset, is possible also some sequences may take

up to 3 minutes before lock-out is displayed, e.g. air pressure switch failure fault 1 or water over heating fault 6.

FAULT CODES FAULT

Lack of gas or ignition problems

Minimum burner pressure set to low

Flame supervision failure

0 Repeating 5 second flashes

With no 1 second flashes

Burner on but flame indicator off

1 One 1 second flash Air pressure switch failure, crossed tubes or flue venturi blocked

3 Three 1 second flashes Low central heating pressure or Hi-limit stat failure

4 Four 1 second flashes Printed circuit board failure

5 Five 1 second flashes Flame supervision failure, indicator light on burner off

6 Six 1 second flashes Water overheating

7 Seven 1 second flashes Control panel failure

9 Nine 1 second flashes Gas valve control circuit failure

10 Ten 1 second flashes Domestic hot water thermistor failure

12 Twelve 1 second flashes Central heating thermistor failure

These fault codes are for the new type PCB with the part number MU0870700, this can be

found on the bottom right hand corner of the board. You can also easily identify this PCB

which has two blue transformers attached.

This is a direct replacement for the older PCB with the part number MU0868700, this can be

found on the bottom centre of the board.

Note: Fan wire will need threading down from the fan to allow the plug to reach the

repositioned J10 terminal.

Heating works .hot water comes on for about 30 seconds and nocks off but Heating stays on.if I run hot water with heating off it trips the boiler off Submitted on 10-4-2023 at 09:10
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Fagor FEB-20E UK ECOPLUS Manual

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