XSol Diagnostic System

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

BAXI 100 HE

WARNING - IMPORTA

Next: &24, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CASE REMOVAL

Next: &1530, !f25

FAN RUNS

ENSURE BOILER IS COOL

Next: &35, f1696

BURNER IGNITES AND ESTABLISHES

Next: &38, ?253, ?255, ?701, ?947

CH OPERATION

Next: &41, ?367, ?371, ?500, ?621

DHW OPERATION

HW DEMAND

Next: &nff, ?373, ?375

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &31, !f1528

HOW TO SET MULTIMETER TO DIODE TEST

THE IMAGES BELOW SHO

Next: &nff, !f932

FUSE INVESTIGATION TREE

OUTSIDE MODEL

Next: &nff, f1511

OBSERVATION POWER LED

BOILER TEMPERATURE CONTROL SET TO OFF POSITION

Next: &324, f1531

FAULT CODE DRY FIRE

NOT USED

Next: &nff, f1671

FAULT CODES

Next: &nff, !f1858

FAULT CODE SAFETY LOCKOUT

NOT USED

Next: &nff, f1904

FAULT CODE FLOW THERMISTOR

Next: &nff, f1927

FAULT CODE IGNITION

NOT USED

Next: &nff, f1938

OBSERVATION SPARKING CONFIRMATION

REMOVE THE TOP TWO S

Next: &nff, !f2048

EXPLOSIVE IGNITION

ELECTRODES

Next: End

EXPLOSIVE IGNITION 4

ELECTRODES

Next: End

EXPLOSIVE IGNITION 6

ELECTRODES

Next: End

EXPLOSIVE IGNITION 1

ELECTRODES

Next: End

EXPLOSIVE IGNITION 5

ELECTRODES

Next: End

EXPLOSIVE IGNITION 7

ELECTRODES

Next: End

NO SPARKING 2

ELECTRODES

Next: End

NO SPARKING 3

ELECTRODES

Next: End

EXPLOSIVE IGNITION

COMBUSTION SEALS

Next: End

EXPLOSIVE IGNITION

HEAT EXCHANGER FLUE WAYS

Next: End

EXPLOSIVE IGNITION

VENTURI

Next: End

EXPLOSIVE IGNITION

BURNER ASSEMBLY

Next: End

EXPLOSIVE IGNITION

FLUE

Next: End

EXPLOSIVE IGNITION

PCB CONTROL JUMPER JP4

Next: End

EXPLOSIVE IGNITION

HARNESS IGNITION - 3 SHORT WIRES

Next: End

EXPLOSIVE IGNITION

SPARK ELECTRODE LEAD

Next: End

EXPLOSIVE IGNITION 2

COMBUSTION SEALS

Next: End

EXPLOSIVE IGNITION 3

HEAT EXCHANGER FLUE WAYS

Next: End

EXPLOSIVE IGNITION 3

VENTURI

Next: End

EXPLOSIVE IGNITION 3

BURNER ASSEMBLY

Next: End

EXPLOSIVE IGNITION 3

FLUE

Next: End

EXPLOSIVE IGNITION 3

PCB CONTROL JUMPER JP4

Next: End

EXPLOSIVE IGNITION 2

ELECTRODES

Next: End

EXPLOSIVE IGNITION 3

COMBUSTION SEALS

Next: End

EXPLOSIVE IGNITION 1

HEAT EXCHANGER FLUE WAYS

Next: End

EXPLOSIVE IGNITION 1

VENTURI

Next: End

EXPLOSIVE IGNITION 1

BURNER ASSEMBLY

Next: End

EXPLOSIVE IGNITION 1

FLUE

Next: End

EXPLOSIVE IGNITION 1

PCB CONTROL JUMPER JP4

Next: End

NO SPARKING 2

SPARK ELECTRODE LEAD

Next: End

EXPLOSIVE IGNITION 2

HEAT EXCHANGER FLUE WAYS

Next: End

EXPLOSIVE IGNITION 2

BURNER ASSEMBLY

Next: End

EXPLOSIVE IGNITION 2

VENTURI

Next: End

EXPLOSIVE IGNITION 1

COMBUSTION SEALS

Next: End

EXPLOSIVE IGNITION 2

FLUE

Next: End

EXPLOSIVE IGNITION 2

PCB CONTROL JUMPER JP4

Next: End

EXPLOSIVE IGNITION 1

SPARK ELECTRODE LEAD

Next: End

EXPLOSIVE IGNITION 1

HARNESS IGNITION - 3 SHORT WIRES

Next: End

EXPLOSIVE IGNITION 3

ELECTRODES

Next: End

NO SPARKING 3

SPARK ELECTRODE LEAD

Next: End

FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION

PUMP EXTERNAL

Next: End

FUSE INVESTIGATION

TRANSFORMER 24V 50VA

Next: End

FUSE INVESTIGATION

FAN ASSEMBLY - MVL

Next: End

FUSE INVESTIGATION

GAS VALVE - HONEYWELL

Next: End

FUSE INVESTIGATION

PLUGLEAD - RECTIFICATION - GAS VALVE

Next: End

TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECT

Next: End

POWER LED

Z REDIRECT

Next: End

MAINS FUSE - PUMP VIA EXT CONTROLS

Z REDIRECT

Next: End

RUNNING SLOW - NO PUMP

PUMP EXTERNAL

Next: End

NO POWER TO PUMP

PCB CONTROL

Next: End

FAN DOES NOT RUN

PUMP EXTERNAL

Next: End

FAN RUNS

THERMOSTAT - OVERHEAT

Next: End

FAN RUNS 1

THERMOSTAT - OVERHEAT

Next: End

FAN DOES NOT RUN

FAN ASSEMBLY - MVL

Next: End

FAN DOES NOT RUN

PCB CONTROL

Next: End

FAN RUNS

BOARD ELECTRONIC USER ASSEMBLY

Next: End

SPARKING PRESENT CH

PCB CONTROL

Next: End

SPARKING PRESENT

FUSE F3 2AT IGNITION BOARD

Next: End

POOR CONDITION GAP INCORRECT

ELECTRODES

Next: End

NO SPARKING 4

ELECTRODES

Next: End

NO SPARKING

SPARK ELECTRODE LEAD

Next: End

NO SPARKING

ELECTRODES

Next: End

NO SPARKING 5

ELECTRODES

Next: End

NO SPARKING

HARNESS IGNITION - 3 SHORT WIRES

Next: End

SPARKING NOT PRESENT

ELECTRODES

Next: End

SPARKING PRESENT

SPARK ELECTRODE LEAD

Next: End

WATER2

GAS VALVE - HONEYWELL

Next: End

DRIED ALL WORKING2

IMPULSE TUBE WATER INGRES

Next: End

BURNER DOES NOT IGNITE

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

BURNER DOES NOT IGNITE

GAS VALVE - HONEYWELL

Next: End

GV HARNESS RECTIFIER

PLUGLEAD - RECTIFICATION - GAS VALVE

Next: End

BURNER DOES NOT IGNITE

INJECTOR PIPE

Next: End

BURNER DOES NOT IGNITE

ELECTRODES

Next: End

NO SPARKING 1

ELECTRODES

Next: End

NO SPARKING 1

SPARK ELECTRODE LEAD

Next: End

BURNER DOES NOT IGNITE 1

ELECTRODES

Next: End

NO SPARKING 6

ELECTRODES

Next: End

NO SPARKING 1

HARNESS IGNITION - 3 SHORT WIRES

Next: End

SPARKING NOT PRESENT 1

ELECTRODES

Next: End

BURNER DOES NOT IGNITE

SPARK ELECTRODE LEAD

Next: End

BURNER DOES NOT IGNITE

VENTURI

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

DOES NOT IGNITE

HEAT EXCHANGER FLUE WAYS

Next: End

BURNER DOES NOT IGNITE

BURNER ASSEMBLY

Next: End

DOES NOT IGNITE

PCB CONTROL JUMPER JP4

Next: End

DOES NOT ESTABLISH SHORTING TO EARTH

KIT - CONDENSATE TRAP

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - CONDENSATE TRAP

Next: End

IMPULSE TUBE 3

GAS VALVE - HONEYWELL

Next: End

IMPULSE TUBE 3

IMPULSE TUBE WATER INGRES

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

ELECTRODES

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

HARNESS

Next: End

DOES NOT ESTABLISH

HARNESS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

HEAT EXCHANGER FLUE WAYS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

BURNER ASSEMBLY

Next: End

BURNER DOES NOT ESTABLISH

FLUE

Next: End

FAULT CODES

Z REDIRECT

Next: End

FAULT CODE SAFETY STAT 2

THERMOSTAT - OVERHEAT

Next: End

FAULT CODE SAFETY STAT 1

THERMOSTAT - OVERHEAT

Next: End

FAULT CODE SAFETY STAT

PUMP EXTERNAL

Next: End

FAULT CODE SAFETY STAT

THERMISTOR FLOW TEMPERATURE

Next: End

FAULT CODE THERMISTOR

THERMISTOR FLOW TEMPERATURE

Next: End

FAULT CODE THERMISTOR

PCB CONTROL

Next: End

FAULT CODE IGNITION 2

FAN ASSEMBLY - MVL

Next: End

FAULT CODE IGNITION

PCB CONTROL

Next: End

POWER LED

PCB CONTROL

Next: End

FAN DOES NOT RUN

SET - 10 OFF FUSES 4A 20MM

Next: End

NO LED

HARNESS

Next: End

FAN RUNS 2

THERMISTOR FLOW TEMPERATURE

Next: End

SPARKING CONFIRMATION

Z REDIRECT

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

GAS INLET PRESSURE

Next: End

GAS RATE

KIT - CONDENSATE TRAP

Next: End

GAS RATE

FLUE

Next: End

GAS RATE

VENTURI

Next: End

GAS RATE

FAN ASSEMBLY - MVL

Next: End

GAS RATE

BURNER ASSEMBLY

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

THERMISTOR FLOW TEMPERATURE

Next: End

BOILER NOISY

PUMP EXTERNAL

Next: End

FAULT CODE SAFETY STAT

COMBUSTION SEALS

Next: End

INSUFFICIENT HEAT

PCB CONTROL JUMPERS

Next: End

CH TO MUCH HEAT

PCB CONTROL JUMPERS

Next: End

ELECTRICAL CHECKS

ELECTRICAL CHECKS

Next: End

BOILER TO TEMPERATURE RADIATORS COOL

PUMP EXTERNAL

Next: End

BOILER TO TEMPERATURE RADIATORS COOL

THERMISTOR FLOW TEMPERATURE

Next: End

BOILER TO TEMPERATURE RADIATORS COOL

Next: End

RADS TOO HOT

THERMISTOR FLOW TEMPERATURE

Next: End

BOILER NOISY

THERMISTOR FLOW TEMPERATURE

Next: End

DIES AWAY

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OUT

HEAT EXCHANGER FLUE WAYS

Next: End

WATER

GAS VALVE - HONEYWELL

Next: End

DRIED ALL WORKING

IMPULSE TUBE WATER INGRES

Next: End

BURNER BAFFLES

BURNER ASSEMBLY

Next: End

BURNER BAFFLES

FLUE

Next: End

DIODE INFORMATION

Z REDIRECT

Next: End

EXPLOSIVE IGNITION - WATER DAMAGE

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION

IMPULSE TUBE WATER INGRES

Next: End

EXPLOSIVE IGNITION

GAS INLET PRESSURE

Next: End

EXPLOSIVE IGNITION - NOT OPENING PROPERLY

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION - NOT OPENING PROPERLY 3

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION - NOT OPENING PROPERLY 1

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION - NOT OPENING PROPERLY 2

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

EXPLOSIVE IGNITION 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

EXPLOSIVE IGNITION 2

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

EXPLOSIVE IGNITION 3

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

FUSE INVESTIGATION

HARNESS

Next: End

FUSE INVESTIGATION

FURTHER INFORMATION FUSE BLOWN

Next: End

POWER LED

HARNESS

Next: End

POWER LED

Next: End

PUMP WIRED VIA EXTERNAL CONTROLS

Next: End

PUMP WIRED VIA EXTERNAL CONTROLS

Next: End

PUMP WIRED VIA BOILER PUMP FEED

PUMP EXTERNAL

Next: End

PUMP WIRED VIA BOILER PUMP FEED

PCB CONTROL

Next: End

PUMP RUNS

FLOW SWITCH - ALTECNIC

Next: End

PUMP WIRED VIA BOILER PUMP FEED

HARNESS

Next: End

FAN DOES NOT RUN

FLOW SWITCH - ALTECNIC

Next: End

FAN DOES NOT RUN

HARNESS

Next: End

FAN RUNS OUTPUT FROM PCB

HARNESS

Next: End

VOLTAGE OK NOT RUNNING

FAN ASSEMBLY - MVL

Next: End

FAN RUNS

HARNESS

Next: End

WIRING HARNESS CONTROL PCB TO IGNITION PCB

HARNESS

Next: End

FUSE INVESTIGATION F3

Z REDIRECT

Next: End

NO SPARKING 2

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

SPARKING PRESENT

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

IMPULSE TUBE2

WATER LEAK AND GAS VALVE

Next: End

IMPULSE TUBE2

WATER LEAK

Next: End

MECHANICAL FAILURE

GAS VALVE - HONEYWELL

Next: End

SPARKING ABSENT 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

SPARKING ABSENT

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING 3

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

BURNER DOES NOT IGNITE 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

DOES NOT IGNITE WITH PRESSURE DROP

GAS VALVE - HONEYWELL

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH 2

HARNESS

Next: End

IMPULSE TUBE 3

WATER LEAK AND GAS VALVE

Next: End

IMPULSE TUBE 3

WATER LEAK

Next: End

IGNITES BUT DOES NOT ESTABLISH

PCB CONTROL

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

FAULT CODE DRY FIRE

PCB CONTROL

Next: End

FAULT CODE SAFETY STAT

PCB CONTROL

Next: End

FAULT CODE SAFETY STAT

HARNESS

Next: End

FAULT CODE SAFETY STAT

FAULT CODE

Next: End

FAULT CODE SAFETY STAT 1

PCB CONTROL

Next: End

FAULT CODE THERMISTOR

HARNESS

Next: End

FAULT CODE THERMISTOR

FAULT CODE

Next: End

FAULT CODE IGNITION

Z REDIRECT

Next: End

FAULT CODE IGNITION

HARNESS

Next: End

FAULT CODE IGNITION

FAN ASSEMBLY - MVL

Next: End

POWER LED

TRANSFORMER 24V 50VA

Next: End

FUSE INVESTIGATION F2

Z REDIRECT

Next: End

NO LED

BOARD ELECTRONIC USER ASSEMBLY

Next: End

NO LED

PCB CONTROL

Next: End

HW NOT RECOGNISED

Next: End

HW UNSATISFACTROY

Next: End

FAN RUNS 2

HARNESS

Next: End

GAS RATE

HEAT EXCHANGER FLUE WAYS

Next: End

RADS TOO COOL

PCB CONTROL

Next: End

FAULT CODE SAFETY STAT 3

THERMOSTAT - OVERHEAT

Next: End

RADS TOO MUCH HEAT

PCB CONTROL

Next: End

BOILER TO TEMPERATURE RADIATORS COOL

Next: End

HEAT EXCHANGER ASSEMBLY

HEAT EXCHANGER ASSEMBLY

Next: End

IMPULSE TUBE

WATER LEAK AND GAS VALVE

Next: End

IMPULSE TUBE

WATER LEAK

Next: End

BURNER BAFFLES

GAS VALVE - HONEYWELL

Next: End

EXPLOSIVE IGNITION

WATER LEAK AND GAS VALVE

Next: End

EXPLOSIVE IGNITION

WATER LEAK

Next: End

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1145

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1147

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1164

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1166

1 WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1211

1 WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1220

PUMP DOES NOT RUN - WIRED VIA BOILER PUMP FEED

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p1675

PUMP DOES NOT RUN - WIRED VIA EXTERNAL CONTROLS

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p1677

PUMP STILL DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS WITH LINK

Next: !p1685

PUMP RUNS BOILER STILL DOES NOT OPERATE

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS WITH LINK

Next: p1687

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1737

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1739

1 WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1741

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1784

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1786

1 WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1788

TEMPERATURE EXCEEDS 82 °C & CONTINUES TO FIRE

CHARACTERISTIC TEST FROM OBSERVATION - OVERHEAT

Next: !p1920

BOILER GOES TO FAULT CODE BEFORE 82°C

CHARACTERISTIC TEST FROM OBSERVATION - OVERHEAT

Next: !p2091

Burner does not ignite

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p1722

Burner ignites but does not establish

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p1821

Boiler to temperature, radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p473

Boiler and radiators provide too much heat

CHARACTERISTIC TEST FROM CH OPERATION

Next: p690

HW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p2042

HW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p2041

Boiler noisy

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2070

Radiators provide insufficient heat

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2092

Burner ignites but flame baffles out or dies away

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p782

NOISY / EXPLOSIVE IGNITION

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p949

26/09/2019 11:48:15 1907_1_50_1 07/10/2019 10:51:15

26/09/2019 13:47:55

Next: End

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1159, !f1160

OBSERVATION APPLIANCE ISOLATED

{GAINPCBACS}
REMO

Next: p1512, !f1513

RESISTANCE FAN

REMOVE CONNECTOR FROM THE FAN

Next: !p1520, !f1521

VOLTAGE CONTROL BOARD IN

{GAINPCBACS}

Next: p1952, f1537

MAINS POWER SUPPLY AT BOILER

{GAINPCBACS}

Next: !p1538, f1542

NO VOLTAGE TO APPLIANCE - FURTHER INVESTIGATION

Next: !p1543, !f1544

RESISTANCE FLOW SWITCH

DISCONNECT THE FLOW

Next: !p1859, f1672

PUMP RUNS

Next: p1673, ?1674, ?1676

NO VOLTAGE TO PUMP - FURTHER INVESTIGATION

VOLTAGE IS ONLY SUPP

Next: !p1680, !f1681

PUMP LIMPET

Next: !p1690, !f1691

RESISTANCE FLOW SENSOR & HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p1697, f2044

RESISTANCE SAFETY STAT

DISCONNECT ONE OF TH

Next: p1703, !f1704

RESISTANCE FAN

REMOVE CONNECTOR FROM THE FAN

Next: !p1711, !f1712

RESISTANCE BOILER TEMPERATURE CONTROL

GAIN ACCESS TO BOILER TEMPERATURE CONTROL PCB
REMOVE CONNECTOR FROM PCB

Next: !p1720, !f1721

IGNITION BOARD VOLTAGE IN

{GAINPCBACS}

Next: p1724, f1725

CONTROL PCB - IGNITION PCB SUPPLY

Next: !p1726, !f1727

FUSE FURTHER INVESTIGATION

Next: !p1730, !f1731

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

REMOVE WATER INGRESS FROM IMPULSE TUBE
FIT IMPULSE TUBE BACK TO GAS VALVE AND COMBUSTION CHAMBER

Next: p1759, f1760

VISUALLY CHECK FOR WATER LEAKS

Next: !p1761, !f1762

GAS VALVE VOLTAGE

{GAINPCBACS}

Next: p1769, !f1770

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1779, !f1780

CONDENSATE PIPE

Next: !p1824, !f1825

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

REMOVE WATER INGRESS FROM IMPULSE TUBE
FIT IMPULSE TUBE BACK TO GAS VALVE AND COMBUSTION CHAMBER

Next: p1830, f1831

VISUALLY CHECK FOR WATER LEAKS

Next: !p1832, !f1833

RESISTANCE FLAME SENSE ELECTRODE

CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1845, !f1846

RESET BOILER (SAFETY STAT)

ENSURE BOILER IS COOL

Next: p1905, f1906

RESISTANCE SAFETY THERMOSTATS AND HARNESS - FAULT CODE

DISCONNECT CONNECTOR CN8 FROM THE CONTROL PCB

Next: !p1907, f1908

RESISTANCE SAFETY STAT

DISCONNECT ONE OF TH

Next: p1909, !f1910

RESISTANCE FLOW SENSOR & HARNESS

REMOVE CONNECTOR CN8 FROM THE PCB

Next: p1931, f1932

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p1933, !f1934

FAN RUNS - FAULT CODE

ENSURE BOILER IS COOL

Next: !p1939, f1941

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR CN4 FROM THE RIGHT HAND PCB

Next: p1942, f1943

RESISTANCE FAN

REMOVE CONNECTOR FROM THE FAN

Next: !p1944, !f1945

VOLTAGE TRANSFORMER OUTPUT

Next: p1971, f1972

VOLTAGE TRANSFORMER INPUT

Next: !p1973, !f1974

FUSE FURTHER INVESTIGATION

Next: !p1977, !f1978

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p2045, !f2046

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT

Next: p2053, !f2054

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

REMOVE WATER INGRESS FROM IMPULSE TUBE
FIT IMPULSE TUBE BACK TO GAS VALVE AND COMBUSTION CHAMBER

Next: p790, f791

VISUALLY CHECK FOR WATER LEAKS

Next: !p792, !f793

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

REMOVE WATER INGRESS FROM IMPULSE TUBE
FIT IMPULSE TUBE BACK TO GAS VALVE AND COMBUSTION CHAMBER

Next: p952, f953

VISUALLY CHECK FOR WATER LEAKS

Next: !p954, !f955

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1140, !f1141

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p1142, ?1144, ?1146, ?1210

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

DISCONNECT THE LEADS

Next: p1154, !f1155

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

DISCONNECT THE LEADS

Next: p1150, !f1151

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

DISCONNECT THE LEADS

Next: p1340, !f1353

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

Next: p1309, !f1322

RESISTANCE HARNESS - NO WIRE VERSION

Next: p1324, !f1337

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p1161, ?1163, ?1165, ?1219

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

DISCONNECT THE LEADS

Next: p1173, !f1174

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

DISCONNECT THE LEADS

Next: p1169, !f1170

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

DISCONNECT THE LEADS

Next: !p1471, !f1472

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

Next: !p1469, !f1470

RESISTANCE HARNESS - NO WIRE VERSION

Next: !p1467, !f1468

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

DISCONNECT THE LEADS

Next: p1212, !f1213

RESISTANCE HARNESS - 1 WIRE VERSION

Next: p1355, !f1368

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

DISCONNECT THE LEADS

Next: p1221, !f1222

RESISTANCE HARNESS - 1 WIRE VERSION

Next: !p1473, !f1474

INSPECTION COMBUSTION SEALS

Next: p1310, !f1311

HEAT EXCHANGER FLUE WAYS

Next: p1312, !f1313

FAN ASSEMBLY AIR INTAKE

Next: p1314, !f1315

BURNER

Next: p1316, !f1317

FLUE

Next: p1318, !f1319

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1320, !f1321

INSPECTION COMBUSTION SEALS

Next: p1325, !f1436

HEAT EXCHANGER FLUE WAYS

Next: p1327, !f1433

FAN ASSEMBLY AIR INTAKE

Next: p1329, !f1435

BURNER

Next: p1331, !f1434

FLUE

Next: p1333, !f1437

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1439, !f1440

INSPECTION COMBUSTION SEALS

Next: p1341, !f1342

HEAT EXCHANGER FLUE WAYS

Next: p1343, !f1344

FAN ASSEMBLY AIR INTAKE

Next: p1345, !f1346

BURNER

Next: p1347, !f1348

FLUE

Next: p1349, !f1350

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1351, !f1352

INSPECTION COMBUSTION SEALS

Next: p1356, !f1357

HEAT EXCHANGER FLUE WAYS

Next: p1358, !f1359

FAN ASSEMBLY AIR INTAKE

Next: p1360, !f1361

BURNER

Next: p1362, !f1363

FLUE

Next: p1364, !f1365

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1366, !f1367

RESISTANCE PUMP

DISCONNECT WIRES FROM PUMP
(PUMP IS FITTED EXTERNAL TO APPLIANCE)

Next: p1514, !f1515

RESISTANCE TRANSFORMER

{GAINPCBACS}
DISCONNECT PLUG CN5 FROM THE CONTROL PCB

Next: p1516, !f1517

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR CN4 FROM THE RIGHT HAND PCB

Next: p1518, f1519

RESISTANCE GAS VALVE

DISCONNECT GAS VALVE ELECTRICAL CONNECTOR PLUG
(HELD BY ONE CENTRE SCREW) FROM GAS VALVE

Next: p1524, !f1523

DIODE TEST HARNESS GAS VALVE

REMOVE THE CONNECTOR

Next: !p1525, !f1527

PUMP LIMPET

Next: !p1694, !f1695

OBSERVATION PUMP RUNS WITH LINK

{GAINPCBACS}
INSE

Next: p1682, ?1684, ?1686

PUMP SUPPLY

GAIN ACCESS TO PUMP ELECTRICAL CONNECTIONS, USE ISOLATION MAT AS REQUIRED

Next: !p1678, f1679

CONTROL PCB - PUMP FEED SUPPLY

Next: !p1692, !f1693

RESISTANCE FLOW SWITCH

DISCONNECT THE FLOW

Next: !p1688, f1689

RESISTANCE SAFETY THERMOSTATS AND HARNESS

DISCONNECT CONNECTOR CN8 FROM THE CONTROL PCB

Next: p1701, f1702

RESISTANCE BOILER TEMPERATURE CONTROL & HARNESS

REMOVE CONNECTOR CN3 FROM THE PCB

Next: p1707, f1719

RESISTANCE FAN PROTECTION STAT

DISCONNECT ONE OF TH

Next: !p1705, !f1706

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR CN4 FROM THE RIGHT HAND PCB

Next: p1709, f1710

VOLTAGE FAN UPLIFT ON CONTROL PCB

{GAINPCBACS}

Next: !p1713, !f1714

SPARKING PRESENT

Next: p1756, f1723

FUSE F3

REMOVE FUSE F3 FROM THE IGNITION PCB

Next: p1728, f1729

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1732, !f1733

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p1734, ?1736, ?1738, ?1740

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

DISCONNECT THE LEADS

Next: p1752, !f1753

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

DISCONNECT THE LEADS

Next: p1748, !f1749

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

DISCONNECT THE LEADS

Next: !p1746, !f1747

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

DISCONNECT THE LEADS

Next: p1742, !f1743

RESISTANCE HARNESS - 1 WIRE VERSION

Next: !p1744, !f1745

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

Next: !p1750, !f1751

RESISTANCE HARNESS - NO WIRE VERSION

Next: !p1754, !f1755

CHECK IMPULSE TUBE FOR WATER

IMPULSE TUBE IS LOCATED ON THE GAS VALVE
RUNNING TO THE COMBUSTION CHAMBER

Next: p1757, f1758

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT

Next: p1765, !f1766

VISUALLY CHECK FOR WATER LEAKS

Next: !p1763, !f1764

GAS USAGE

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT
ENSURE NO OTHER GAS APPLIANCES ARE IN USE

Next: p1767, f1768

OBSERVATION SPARKING AT ELECTRODE

REMOVE THE TOP TWO S

Next: p1777, f1778

GAS VALVE RESISTANCE

DISCONNECT GAS VALVE ELECTRICAL CONNECTOR PLUG (HELD BY ONE CENTRE SCREW) FROM GAS VALVE

Next: p1771, !f1772

DIODE TEST HARNESS GAS VALVE

REMOVE THE CONNECTOR

Next: p1773, !f1774

INJECTOR PIPE

Next: !p1775, !f1776

FAN ASSEMBLY AIR INTAKE

Next: p1803, !f1804

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p1781, ?1783, ?1785, ?1787

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

DISCONNECT THE LEADS

Next: p1799, !f1800

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

DISCONNECT THE LEADS

Next: p1795, !f1796

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

DISCONNECT THE LEADS

Next: !p1793, !f1794

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

DISCONNECT THE LEADS

Next: p1789, !f1790

RESISTANCE HARNESS - 1 WIRE VERSION

Next: !p1791, !f1792

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

Next: !p1797, !f1798

RESISTANCE HARNESS - NO WIRE VERSION

Next: !p1801, !f1802

FLUE

Next: p1805, !f1806

HEAT EXCHANGER FLUE WAYS

Next: p1807, !f1808

BURNER

Next: p1809, !f1810

INSPECTION CONTROL BOARD JP4

REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1811, !f1812

DISCONNECT CONDENSATE TRAP WIRE

DISCONNECT THE WIRE FROM THE CONDENSATE TRAP AND MAKE SAFE

Next: p1822, f1823

CONDENSATE PIPE

Next: p1826, !f1827

CHECK IMPULSE TUBE FOR WATER

IMPULSE TUBE IS LOCATED ON THE GAS VALVE
RUNNING TO THE COMBUSTION CHAMBER

Next: p1842, f1829

VISUALLY CHECK FOR WATER LEAKS

Next: !p1834, !f1835

VOLTAGE IGNITION BOARD TO MAIN BOARD AT IGNITION BOARD

{GAINPCBACS}

Next: p1843, f1844

VOLTAGE IGNITION BOARD TO MAIN BOARD AT MAIN BOARD

Next: !p1848, !f1849

RESISTANCE FLAME SENSE ELECTRODE LEAD

DISCONNECT THE FLAME SENSE LEAD / INLINE CONNECTOR FROM THE ELECTRODE

Next: p1850, !f1847

HEAT EXCHANGER FLUE WAYS

Next: p1851, !f1852

BURNER

Next: p1853, !f1854

FLUE

Next: !p1855, !f1856

PUMP LIMPET

Next: p1913, !f1914

RESISTANCE FAN PROTECTION STAT

DISCONNECT ONE OF TH

Next: !p1911, !f1912

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p2076, !f1916

OBSERVATION - OVERHEAT

Next: !p1917, ?1919, ?1921

RESET BOILER

ENSURE BOILER IS COOL

Next: !p1935, !f1936

VOLTAGE FAN UPLIFT ON CONTROL PCB

{GAINPCBACS}

Next: !p1946, !f1947

FAN RUNS - NO LED

ENSURE BOILER IS COOL

Next: p1969, f1970

RESISTANCE HARNESS BOARD ELECTRONIC

REMOVE CONNECTORS CN3 CONTROL PCB & FROM ELECTRONIC USER PCB

Next: !p1983, !f1984

RESISTANCE FUSE F2

REMOVE FUSE F2 FROM THE CONTROL PCB

Next: !p1987, f1976

GAS RATE

Next: p2051, f2052

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p2065, !f2066

CONDENSATE PIPE

Next: p2055, !f2056

FLUE

Next: p2057, !f2058

FAN ASSEMBLY AIR INTAKE

Next: p2059, !f2060

INSPECTION FAN ASSEMBLY

REMOVE FAN ASSEMBLY & AIR INTAKE FROM FAN ASSEMBLY

Next: p2061, !f2062

BURNER

Next: !p2063, !f2064

PUMP LIMPET TEST

Next: p695, !f2074

INSPECTION COMBUSTION SEALS

Next: p1915, !f2087

PCB CONTROL JUMPERS

Next: p2050, !f2110

PCB CONTROL JUMPERS

Next: !p2112, !f2113

PUMP LIMPET TEST

Next: p543, !f483

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p544, !f545

EXTERNAL BYPASS

Next: !p546, !f547

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p2111, !f692

RESISTANCE FLOW SENSOR

DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p696, !f697

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT

Next: p703, !f704

HEAT EXCHANGER FLUE WAYS

Next: p924, !f706

CHECK IMPULSE TUBE FOR WATER

IMPULSE TUBE IS LOCATED ON THE GAS VALVE
RUNNING TO THE COMBUSTION CHAMBER

Next: p702, f789

VISUALLY CHECK FOR WATER LEAKS

Next: !p794, !f795

BURNER

Next: p925, !f927

FLUE

Next: !p926, !f928

CHECK IMPULSE TUBE FOR WATER

IMPULSE TUBE IS LOCATED ON THE GAS VALVE
RUNNING TO THE COMBUSTION CHAMBER

Next: p950, f951

GAS INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT

Next: p966, !f959

VISUALLY CHECK FOR WATER LEAKS

Next: !p956, !f957

OBSERVATION SPARKING AT ELECTRODE

REMOVE THE TOP TWO S

Next: p1139, f1158

System Information

Total Tests: 429

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control