XSol Diagnostic System

POTTERTON PROMAX 24 HE

GLOBALLY REPLACED

Next: &24, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

POTTERTON PROMAX 24 HE

{ISOLATEMAINSPOWER}<

Next: &324, !f25

PUMP RUNS

BOILER ON/OFF SWITCH ON

Next: &31, ?381, ?383

FAN RUNS

BOILER ON/OFF SWITCH ON

Next: &748, f1389

BURNER IGNITES AND ESTABLISHES

BOILER ON/OFF SWITCH ON

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

CH OPERATION

BOILER ON/OFF SWITCH ON

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

DHW OPERATION

Next: &nff, ?373, ?375

ADDITIONAL INFORMATION

Next: &28, !f325

SPARKING PRESENT

BOILER ON/OFF SWITCH ON

Next: &35, f749

OBSERVATION SPARKING CONFIRMATION

{ISOLATEMAINSPOWER}<

Next: &nff, !f930

HOW TO SET MULTIMETER TO DIODE TEST

THE IMAGES BELOW SHO

Next: &nff, !f932

FUSE INVESTIGATION TREE

OUTSIDE MODEL

Next: &nff, f1511

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

RUNNING SLOW - NO PUMP

PUMP EXTERNAL

Next: End

PUMP WIRED VIA BOILER PUMP FEED

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

NO POWER TO PUMP

PCB CONTROL

Next: End

NO SPARKING 5

ELECTRODES

Next: End

SPARKING NOT PRESENT

ELECTRODES

Next: End

POOR CONDITION GAP INCORRECT

ELECTRODES

Next: End

NO SPARKING 6

ELECTRODES

Next: End

SPARKING NOT PRESENT 1

ELECTRODES

Next: End

BURNER DOES NOT IGNITE

ELECTRODES

Next: End

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 4

ELECTRODES

Next: End

NO SPARKING 2

ELECTRODES

Next: End

NO SPARKING 1

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

FAN RUNS 3

PCB CONTROL

Next: End

RUNNING SLOW - NO FAN

PUMP EXTERNAL

Next: End

FAN RUNS

THERMISTOR FLOW TEMPERATURE

Next: End

FAN RUNS

THERMOSTAT - OVERHEAT

Next: End

FAN RUNS

THERMOSTAT - OVERHEAT

Next: End

FAN RUNS

SWITCH ON/OFF - BOILER CONTROL

Next: End

FAN DOES NOT RUN

FAN ASSEMBLY - MVL

Next: End

FAN DOES NOT RUN

PCB CONTROL

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

SPARKING PRESENT

SPARK ELECTRODE LEAD

Next: End

NO SPARKING

HARNESS IGNITION - 3 SHORT WIRES

Next: End

NO SPARKING

ELECTRODES

Next: End

NO SPARKING

SPARK ELECTRODE LEAD

Next: End

BURNER DOES NOT IGNITE

SPARK ELECTRODE LEAD

Next: End

NO SPARKING 1

HARNESS IGNITION - 3 SHORT WIRES

Next: End

BURNER DOES NOT IGNITE 1

ELECTRODES

Next: End

NO SPARKING 1

SPARK ELECTRODE LEAD

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

FAN DOES NOT RUN

SET - 10 OFF FUSES 4A 20MM

Next: End

SPARKING PRESENT

FUSE F3 2AT IGNITION BOARD

Next: End

MAINS FUSE - FAN RUNS

Z REDIRECT

Next: End

MAINS FUSE - PUMP VIA BOILER

Z REDIRECT

Next: End

MAINS FUSE - PUMP VIA EXT CONTROLS

Z REDIRECT

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

ELECTRICAL CHECKS

Next: End

IMPORTANT

NOT USED

Next: End

DHW TOO HOT

THERMISTOR FLOW TEMPERATURE

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

RADIATORS PROVIDE INSUFFICIENT HEAT

GAS INLET PRESSURE

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

THERMISTOR FLOW TEMPERATURE

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

INJECTOR PIPE

Next: End

RADS TOO HOT

THERMISTOR FLOW TEMPERATURE

Next: End

RADS TOO MUCH HEAT

PCB CONTROL JUMPERS

Next: End

BOILER NOISY

THERMISTOR FLOW TEMPERATURE

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

PCB CONTROL JUMPERS

Next: End

DIES AWAY

GAS INLET PRESSURE

Next: End

BURNER BAFFLES OUT

HEAT EXCHANGER FLUE WAYS

Next: End

SPARKING PRESENT CH

PCB CONTROL

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

WATER

GAS VALVE - HONEYWELL

Next: End

DRIED ALL WORKING

IMPULSE TUBE WATER INGRES

Next: End

WATER2

GAS VALVE - HONEYWELL

Next: End

DRIED ALL WORKING2

IMPULSE TUBE WATER INGRES

Next: End

BURNER DOES NOT IGNITE

INJECTOR PIPE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

ELECTRODES

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - CONDENSATE TRAP

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PIPE 5MM NEOPRENE - AKRABEND RB21

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

DOES NOT ESTABLISH

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

BURNER BAFFLES

BURNER ASSEMBLY

Next: End

BURNER BAFFLES

FLUE

Next: End

SPARKING CONFIRMATION

Z REDIRECT

Next: End

DIODE INFORMATION

Z REDIRECT

Next: End

DOES NOT ESTABLISH SHORTING TO EARTH

KIT - CONDENSATE TRAP

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

BURNER DOES NOT IGNITE

VENTURI

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

DOES NOT IGNITE WITH PRESSURE DROP

GAS VALVE - HONEYWELL

Next: End

PUMP WIRED VIA BOILER PUMP FEED

Next: End

PUMP WIRED VIA BOILER PUMP FEED

PUMP EXTERNAL

Next: End

PUMP RUNS

FLOW SWITCH - ALTECNIC

Next: End

PUMP WIRED VIA BOILER PUMP FEED

WIRING HARNESS CONTROL PCB TO PUMP FEED

Next: End

PUMP WIRED VIA BOILER PUMP FEED

PCB CONTROL

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

FAN RUNS

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

FAN RUNS

Next: End

FAN RUNS

TRANSFORMER 24V 50VA

Next: End

FAN RUNS

FLOW SWITCH - ALTECNIC

Next: End

FAN DOES NOT RUN 1

HARNESS WIRING ASSEMBLY (BOILER)

Next: End

FAN DOES NOT RUN

HARNESS WIRING ASSEMBLY (BOILER)

Next: End

FAN RUNS OUTPUT FROM PCB

HARNESS WIRING ASSEMBLY

Next: End

VOLTAGE OK NOT RUNNING

FAN ASSEMBLY - MVL

Next: End

EXPLOSIVE IGNITION - NOT OPENING PROPERLY 2

GAS VALVE - HONEYWELL

Next: End

SPARKING PRESENT

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING 2

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

BURNER DOES NOT IGNITE 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

NO SPARKING 3

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

SPARKING ABSENT

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

SPARKING ABSENT 1

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

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 F2

Z REDIRECT

Next: End

FUSE INVESTIGATION F3

Z REDIRECT

Next: End

FUSE INVESTIGATION

HARNESS WIRING ASSEMBLY

Next: End

FUSE INVESTIGATION

FURTHER INFORMATION FUSE BLOWN

Next: End

DHW TOO COOL

Next: End

PUMP WIRED VIA EXTERNAL CONTROLS

Next: End

PUMP WIRED VIA EXTERNAL CONTROLS

Next: End

DHW TOO HOT

Next: End

BOILER TO TEMPERATURE RADIATORS COOL

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

FAN ASSEMBLY - MVL

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

VENTURI

Next: End

RADIATORS PROVIDE INSUFFICIENT HEAT

GAS VALVE - HONEYWELL

Next: End

RADS TOO MUCH HEAT

PCB CONTROL

Next: End

HEAT EXCHANGER ASSEMBLY

Next: End

RADS TOO COOL

PCB CONTROL

Next: End

WIRING HARNESS CONTROL PCB TO IGNITION PCB

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

IMPULSE TUBE

WATER LEAK AND GAS VALVE

Next: End

IMPULSE TUBE

WATER LEAK

Next: End

IMPULSE TUBE2

WATER LEAK AND GAS VALVE

Next: End

IMPULSE TUBE2

WATER LEAK

Next: End

MECHANICAL FAILURE

GAS VALVE - HONEYWELL

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

BOARD ELECTRONIC ASSEMBLY - IGNITION PCB

Next: End

IGNITES BUT DOES NOT ESTABLISH

PCB CONTROL

Next: End

BURNER BAFFLES

GAS VALVE - HONEYWELL

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PLUGHEAD - RECTIFICATION - GAS VALVE

Next: End

EXPLOSIVE IGNITION

WATER LEAK AND GAS VALVE

Next: End

EXPLOSIVE IGNITION

WATER LEAK

Next: End

PUMP STILL DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS WITH LINK

Next: !p1055

PUMP RUNS BOILER STILL DOES NOT OPERATE

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS WITH LINK

Next: p1057

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1100

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1102

3 SHORT WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1124

1 SHORT WIRE AND 2 LONG WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1126

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: p1199

1 WIRE VERSION

CHARACTERISTIC TEST FROM OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

Next: p1205

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

Burner does not ignite

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p796

Burner ignites but does not establish

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p874

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

DHW too cool

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p374

DHW too hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p376

Pump does not run, pump is wired via boiler pump feed

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p1045

Pump does not run, pump wired via external controls

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p384

Boiler noisy

CHARACTERISTIC TEST FROM CH OPERATION

Next: p695

Radiators provide insufficient heat

CHARACTERISTIC TEST FROM CH OPERATION

Next: p622

Fan pressure too low

CHARACTERISTIC TEST FROM FAN PRESSURE

Next: !p631

Fan pressure too high

CHARACTERISTIC TEST FROM FAN PRESSURE

Next: !p633

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

27/11/2019 11:14:24 1911_1_50_1 06/01/2020 14:21:37

04/12/2019 08:52:08

Next: End

NO VOLTAGE TO APPLIANCE - FURTHER INVESTIGATION

Next: !p1048, !f1508

PUMP LIMPET

Next: !p1060, !f1061

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

{ISOLATEMAINSPOWER}
CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1159, !f1160

VOLTAGE CONTROL BOARD IN

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE INSULATION MAT AS NECESSARY)

Next: p1390, f1391

VOLTAGE MAINS POWER SUPPLY AT BOILER

Next: !p1392, f1393

NO VOLTAGE TO APPLIANCE - FURTHER INVESTIGATION

Next: !p1394, !f1506

VOLTAGE TRANSFORMER INPUT

Next: !p1400, !f1401

PUMP LIMPET

Next: !p1412, !f1413

RESISTANCE FLOW SENSOR

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p1416, !f1417

RESISTANCE SAFETY STAT

{ISOLATEMAINSPOWER}<

Next: p1420, !f1421

RESISTANCE FAN

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR FROM THE FAN

Next: !p1428, !f1429

FUSE FURTHER INVESTIGATION

Next: !p1482, !f1483

FUSE FURTHER INVESTIGATION

Next: !p1485, !f1486

OBSERVATION APPLIANCE ISOLATED

{ISOLATEMAINSPOWER}<

Next: p1512, !f1513

RESISTANCE FAN

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR FROM THE FAN

Next: !p1520, !f1521

NO VOLTAGE TO PUMP - FURTHER INVESTIGATION

THIS APPLIANCE / PUM

Next: !p457, !f1510

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT
BOILER ON/OFF SWITCH ON

Next: p625, !f626

IGNITION BOARD VOLTAGE IN

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
BOILER ON/OFF SWITCH ON

Next: p750, f751

CONTROL PCB - IGNITION PCB SUPPLY

BOILER ON/OFF SWITCH ON

Next: !p752, !f753

GAS VALVE VOLTAGE

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB (USE ISOLATION MAT AS REQUIRED)
BOILER ON/OFF SWITCH ON

Next: p765, !f766

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

{ISOLATEMAINSPOWER}<

Next: p790, f791

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p792, !f793

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

{ISOLATEMAINSPOWER}<

Next: p819, f820

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p821, !f822

RESISTANCE FLAME SENSE ELECTRODE

{ISOLATEMAINSPOWER}
CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p896, !f897

CONDENSATE TRAP

{ISOLATEMAINSPOWER}

Next: !p945, !f946

REMOVE WATER FROM IMPULSE TUBE DOES BOILER NOW LIGHT

{ISOLATEMAINSPOWER}<

Next: p952, f953

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p954, !f955

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

{ISOLATEMAINSPOWER}
CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p1121, !f1137

INSPECTION CONTROL BOARD JP4

{ISOLATEMAINSPOWER}
REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1003, !f1004

MAINS POWER SUPPLY AT BOILER

{ISOLATEMAINSPOWER}<

Next: p1046, f1047

OBSERVATION PUMP RUNS WITH LINK

{ISOLATEMAINSPOWER}<

Next: p1052, ?1054, ?1056

CONTROL PCB - PUMP FEED SUPPLY

BOILER ON/OFF SWITCH ON

Next: !p1074, !f1075

FLOW SWITCH

{ISOLATEMAINSPOWER}<

Next: p1058, f1059

CONTROL PCB - SUPPLY VOLTAGE

Next: !p1080, !f1063

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1107, !f1108

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1105, !f1106

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: !p1455, !f1456

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1453, !f1454

RESISTANCE HARNESS - NO WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1451, !f1452

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

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

Next: p1122, ?1123, ?1125, ?1204

RESISTANCE SPARK ELECTRODE - NO WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1133, !f1134

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1129, !f1130

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: !p1463, !f1464

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1461, !f1462

RESISTANCE HARNESS - NO WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1459, !f1460

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

{ISOLATEMAINSPOWER}
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

{ISOLATEMAINSPOWER}<

Next: p1154, !f1155

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1150, !f1151

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1340, !f1353

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}

Next: p1309, !f1322

RESISTANCE HARNESS - NO WIRE VERSION

{ISOLATEMAINSPOWER}

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

{ISOLATEMAINSPOWER}<

Next: p1173, !f1174

RESISTANCE SPARK ELECTRODE - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1169, !f1170

RESISTANCE SPARK ELECTRODE - 1 SHORT 2 LONG WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: !p1471, !f1472

RESISTANCE HARNESS - 3 SHORT WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1469, !f1470

RESISTANCE HARNESS - NO WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1467, !f1468

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1200, !f1201

RESISTANCE HARNESS - 1 WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1457, !f1458

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1206, !f1216

RESISTANCE HARNESS - 1 WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1465, !f1466

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1212, !f1213

RESISTANCE HARNESS - 1 WIRE VERSION

{ISOLATEMAINSPOWER}

Next: p1355, !f1368

RESISTANCE SPARK ELECTRODE - 1 WIRE VERSION

{ISOLATEMAINSPOWER}<

Next: p1221, !f1222

RESISTANCE HARNESS - 1 WIRE VERSION

{ISOLATEMAINSPOWER}

Next: !p1473, !f1474

INSPECTION COMBUSTION SEALS

{ISOLATEMAINSPOWER}

Next: p1310, !f1311

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p1312, !f1313

FAN ASSEMBLY AIR INTAKE

{ISOLATEMAINSPOWER}

Next: p1314, !f1315

BURNER

{ISOLATEMAINSPOWER}

Next: p1316, !f1317

FLUE

Next: p1318, !f1319

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

{ISOLATEMAINSPOWER}
REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1320, !f1321

INSPECTION COMBUSTION SEALS

{ISOLATEMAINSPOWER}

Next: p1325, !f1436

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p1327, !f1433

FAN ASSEMBLY AIR INTAKE

{ISOLATEMAINSPOWER}

Next: p1329, !f1435

BURNER

{ISOLATEMAINSPOWER}

Next: p1331, !f1434

FLUE

Next: p1333, !f1437

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

{ISOLATEMAINSPOWER}
REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1439, !f1440

INSPECTION COMBUSTION SEALS

{ISOLATEMAINSPOWER}

Next: p1341, !f1342

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p1343, !f1344

FAN ASSEMBLY AIR INTAKE

{ISOLATEMAINSPOWER}

Next: p1345, !f1346

BURNER

{ISOLATEMAINSPOWER}

Next: p1347, !f1348

FLUE

Next: p1349, !f1350

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

{ISOLATEMAINSPOWER}
REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1351, !f1352

INSPECTION COMBUSTION SEALS

{ISOLATEMAINSPOWER}

Next: p1356, !f1357

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p1358, !f1359

FAN ASSEMBLY AIR INTAKE

{ISOLATEMAINSPOWER}

Next: p1360, !f1361

BURNER

{ISOLATEMAINSPOWER}

Next: p1362, !f1363

FLUE

Next: p1364, !f1365

INSPECTION CONTROL BOARD JP4 (POOR IGNITION)

{ISOLATEMAINSPOWER}
REMOVE CONTROL PCB (RIGHT PCB) FROM ITS HOUSING

Next: !p1366, !f1367

VOLTAGE TRANSFORMER OUTPUT

Next: p1398, f1399

RESISTANCE FUSE F2

{ISOLATEMAINSPOWER}
REMOVE FUSE F2 FROM THE CONTROL PCB

Next: p1409, f1481

RESISTANCE FLOW SWITCH

{ISOLATEMAINSPOWER}<

Next: p1410, f1411

RESISTANCE FLOW SENSOR AND HARNESS

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN8 FROM THE CONTROL PCB

Next: p1414, f1415

RESISTANCE SAFETY THERMOSTATS AND HARNESS

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN8 FROM THE CONTROL PCB

Next: p1418, f1419

RESISTANCE BOILER ON/OFF SWITCH

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE BOILER ON/OFF SWITCH

Next: p1424, !f1425

RESISTANCE FAN PROTECTION STAT

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE WIRES FROM THE FAN PROTECTION STAT

Next: !p1422, !f1423

RESISTANCE FAN AND HARNESS

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN4 FROM THE RIGHT HAND PCB

Next: p1426, f1427

VOLTAGE FAN UPLIFT ON CONTROL PCB

BOILER ON/OFF SWITCH ON

Next: !p1430, !f1432

RESISTANCE PUMP

{ISOLATEMAINSPOWER}
DISCONNECT WIRES FROM PUMP
(PUMP IS FITTED EXTERNAL TO APPLIANCE)

Next: p1514, !f1515

RESISTANCE TRANSFORMER

{ISOLATEMAINSPOWER}
DISCONNECT PLUG CN5 FROM THE CONTROL PCB

Next: p1516, !f1517

RESISTANCE FAN AND HARNESS

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN4 FROM THE RIGHT HAND PCB

Next: p1518, f1519

RESISTANCE GAS VALVE

{ISOLATEMAINSPOWER}<

Next: p1524, !f1523

DIODE TEST HARNESS GAS VALVE

{ISOLATEMAINSPOWER}<

Next: !p1525, !f1527

THERMISTOR - FLOW TEMPERATURE

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p471, !f472

PUMP SUPPLY

Next: !p408, f443

PUMP LIMPET TEST

Next: p543, !f483

THERMISTOR - FLOW TEMPERATURE

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p544, !f545

EXTERNAL BYPASS

Next: !p546, !f547

GAS RATE

Next: p634, f624

FAN PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT

Next: p637, ?630, ?632

THERMISTOR - FLOW TEMPERATURE

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p698, !f636

INJECTOR PIPE

{ISOLATEMAINSPOWER}

Next: !p638, !f656

THERMISTOR - FLOW TEMPERATURE

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: p691, !f692

PCB CONTROL JUMPERS

{ISOLATEMAINSPOWER}

Next: !p693, !f694

THERMISTOR - FLOW TEMPERATURE

{ISOLATEMAINSPOWER}
DISCONNECT ONE OF THE RED WIRES FROM THE THERMISTOR

Next: !p696, !f697

PCB CONTROL JUMPERS

{ISOLATEMAINSPOWER}

Next: !p699, !f700

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT
BOILER ON/OFF SWITCH ON

Next: p703, !f704

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p924, !f706

FUSE F3

{ISOLATEMAINSPOWER}
REMOVE FUSE F3 FROM THE IGNITION PCB

Next: p754, f1484

OBSERVATION SPARK ELECTRODE ASSEMBLY AND GAP

{ISOLATEMAINSPOWER}
CAREFULLY REMOVE THE ELECTRODE FROM THE COMBUSTION BOX DOOR

Next: p756, !f1118

OBSERVATION WHICH TYPE OF ELECTRODE IS FITTED ?

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

Next: p1098, ?1099, ?1101, ?1198

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT
BOILER ON/OFF SWITCH ON

Next: p761, !f762

GAS USAGE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT.

Next: p974, f764

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p767, !f768

DIODE TEST HARNESS GAS VALVE

{ISOLATEMAINSPOWER}<

Next: p825, !f770

CHECK IMPULSE TUBE FOR WATER

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

Next: p702, f789

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p794, !f795

CHECK IMPULSE TUBE FOR WATER

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

Next: p760, f818

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p823, !f824

INJECTOR PIPE

{ISOLATEMAINSPOWER}

Next: !p826, !f827

VOLTAGE IGNITION BOARD TO MAIN BOARD AT IGNITION BOARD

{ISOLATEMAINSPOWER}<

Next: p912, f895

RESISTANCE FLAME SENSE ELECTRODE LEAD

{ISOLATEMAINSPOWER}
DISCONNECT THE FLAME SENSE LEAD FROM THE ELECTRODE

Next: p898, !f899

DISCONNECT CONDENSATE TRAP WIRE

{ISOLATEMAINSPOWER}
DISCONNECT THE WIRE FROM THE CONDENSATE TRAP AND MAKE SAFE

Next: p900, f944

CONDENSATE TRAP

{ISOLATEMAINSPOWER}

Next: p902, !f903

CASE PRESSURE PIPE

{ISOLATEMAINSPOWER}

Next: p904, !f905

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p906, !f907

BURNER

{ISOLATEMAINSPOWER}

Next: p908, !f909

FLUE

Next: !p910, !f911

VOLTAGE IGNITION BOARD TO MAIN BOARD AT MAIN BOARD

BOILER ON/OFF SWITCH ON

Next: !p913, !f914

BURNER

{ISOLATEMAINSPOWER}

Next: p925, !f927

FLUE

Next: !p926, !f928

CHECK IMPULSE TUBE FOR WATER

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

Next: p950, f951

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT
BOILER ON/OFF SWITCH ON

Next: p966, !f959

VISUALLY CHECK FOR WATER LEAKS

{ISOLATEMAINSPOWER}

Next: !p956, !f957

OBSERVATION SPARKING AT ELECTRODE

{ISOLATEMAINSPOWER}<

Next: p1139, f1158

OBSERVATION SPARKING AT ELECTRODE

{ISOLATEMAINSPOWER}<

Next: p994, f989

FAN ASSEMBLY AIR INTAKE

{ISOLATEMAINSPOWER}

Next: p995, !f996

FLUE

Next: p997, !f998

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p999, !f1000

BURNER

{ISOLATEMAINSPOWER}

Next: p1001, !f1002

Welcome to the XSol Diagnostic System