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:

KESTON CELSIUS 25

WARNING - IMPORTA

Next: &329, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

KESTON CELSIUS 25

{ISOLATEMAINSPOWER}<

Next: &391, !f10

SPARKING PRESENT (DHW DEMAND)

ENSURE DHW IS CALLING FOR HEAT

Next: &15, f295

BURNER IGNITION

ENSURE THAT DHW IS CALLING FOR HEAT

Next: &16, f183

BURNER ESTABLISHES

ENSURE THAT DHW IS CALLING FOR HEAT

Next: &17, f201

FULL GAS RATE

Next: &18, f213

CH DEMAND

ENSURE ALL HEATING CONTROLS ARE CALLING

Next: &19, !f226

SYSTEM PRESSURE RISE

Next: &20, !f227

CH OPERATION

Next: &nff, ?228, ?230, ?232

SAFETY NOTICE - ELECTRICAL ISOLATION

A NUMBER OF KESTO

Next: &7, !f330

FAN RUNS

ENSURE THAT DHW IS CALLING FOR HEAT

Next: &12, f600

PUMP RUNS

ENSURE DHW IS CALLING FOR HEAT

Next: &369, f392

HEADER FOR FUSE INVESTIGATION TREE

Next: &nff, f503

FAULT

ELECTRICAL SAFETY CHECKS

Next: End

GAS VALVE FUNCTION

PCB DBI

Next: End

FAULT 1

GAS INLET PRESSURE

Next: End

MECHANICAL 1

GAS VALVE

Next: End

FAULT 1

IGNITION/FLAME SENSE ELECTRODE

Next: End

FAULT LT

IGNITION/ LEAD

Next: End

FAULT 2

SENSOR FLOW CALIBRATION

Next: End

FAULT 2

SENSOR RETURN CALIBRATION

Next: End

FAULT 3

LINK OUT CONTROLS

Next: End

EXPANSION VESSEL

EXPANSION VESSEL

Next: End

FAULT 2

PUMP

Next: End

FAULT 3

SENSOR FLOW CALIBRATION

Next: End

FAULT 3

SENSOR RETURN CALIBRATION

Next: End

FAULT 3

PUMP

Next: End

FAULT 2

Next: End

FAULT 1

Next: End

FAULT 399

SENSOR FLOW CALIBRATION

Next: End

FAULT 399

SENSOR RETURN CALIBRATION

Next: End

FAULT 3

GAS INLET PRESSURE

Next: End

FAULT 2

FLUE

Next: End

FAULT 2

IGNITION/FLAME SENSE ELECTRODE

Next: End

FAULT 2

GAS INLET PRESSURE

Next: End

FAULT 1

CONDENSATE TRAP

Next: End

FAULT 1

FLUE

Next: End

FAULT 2

BURNER

Next: End

BLOCKED 2

AIR PRESSURE TUBE

Next: End

IGNITION FUNCTION

CONTROL PCB

Next: End

FAULT HT

IGNITION/ LEAD

Next: End

NO APSIGNITION FUNCTION

CONTROL PCB

Next: End

NO APSFAULT HT

IGNITION/ LEAD

Next: End

ELECTRICAL ISOLATION

SAFETY NOTICE

Next: End

RECHARGE

SYSTEM CHARGE PRESSURE

Next: End

OC

SYSTEM PRESSURE SWITCH

Next: End

TX SU

CONTROL PCB

Next: End

BLOWN

FUSE THERMAL

Next: End

OC

SENSOR FLUE TEMPERATURE

Next: End

OC

SENSOR FLOW OVERHEAT

Next: End

FASCIA PCB SU 1

CONTROL PCB

Next: End

ON OFF SWITCH 1

FACIA PCB

Next: End

WORN

EARTH LEAD

Next: End

DAMAGED

EARTH LEAD

Next: End

FAULTY

EARTH LEAD

Next: End

WORN

PUMP HARNESS

Next: End

SHORTING

GAS VALVE HARNESS

Next: End

BLOWING FUSE

FAN HARNESS

Next: End

BLOWING FUSES

TRANSFORMER HARNESS

Next: End

SHORT TO EARTH

SENSOR HARNESS

Next: End

BLOWING FUSE

SENSOR HARNESS

Next: End

WORN

SENSOR HARNESS

Next: End

BLOWN

FUSE F1

Next: End

PUMP (RUNS)

FUSE F1

Next: End

BLOWN

FUSE F2

Next: End

BLOWN

FUSE MAIN 3A

Next: End

NO APSBLOWN

FUSE F3 DBI

Next: End

BLOWN

FUSE F3 DBI

Next: End

WORN DAMAGED

FAN HARNESS

Next: End

EXTERNAL CONTROL FUNCTION 2

CONTROL PCB

Next: End

FAULT 1

SENSOR FLOW CALIBRATION

Next: End

FAULT 1

SENSOR RETURN CALIBRATION

Next: End

FASCIA PCB SU

CONTROL PCB

Next: End

ON OFF SWITCH 2

FACIA PCB

Next: End

DEMAND CALIBRATION 1

CONTROL PCB

Next: End

FAULT 1

Next: End

DEMAND CALIBRATION 2

CONTROL PCB

Next: End

DEMAND CALIBRATION 299

CONTROL PCB

Next: End

FAULT FAULT 1

HEAT EXCHANGER

Next: End

MECHANICAL 2

GAS VALVE

Next: End

FAULT 2

FAN ASSEMBLY

Next: End

NO BURNER IGNITION

CONDENSATE TRAP

Next: End

BURNER NOT ESTABLISHING

CONDENSATE TRAP

Next: End

FLAME SENSE FUNCTION

PCB DBI

Next: End

FAILED OC

AIR PRESSURE SWITCH

Next: End

NO SPARK

CONDENSATE TRAP

Next: End

NO APSNO SPARK

CONDENSATE TRAP

Next: End

FAULT 1

PUMP

Next: End

FAULT 1

TRANSFORMER

Next: End

INPUT FROM FASCIA FUNCTION 1

CONTROL PCB

Next: End

FAULT 1

LINK OUT CONTROLS

Next: End

FAULT

Next: End

EXTERNAL CONTROL FUNCTION 1

CONTROL PCB

Next: End

NO APSIGNITION FUNCTION

PCB DBI

Next: End

IGNITION FUNCTION

PCB DBI

Next: End

FAULT 1

BURNER

Next: End

BLOWING FUSE

PUMP

Next: End

SHORTING

GAS VALVE

Next: End

BLOWING FUSE

FAN ASSEMBLY

Next: End

BLOWING FUSE

TRANSFORMER

Next: End

SHORT TO EARTH

SENSOR FLUE TEMPERATURE

Next: End

SHORT TO EARTH

SENSOR FLOW OVERHEAT

Next: End

SHORTING

SYSTEM PRESSURE SWITCH

Next: End

BLANK FOR FUSE F1 INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE F1 INVESTIGATION 2

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE INVESTIGATION F2

Z DIRECTION CHOICE OR CONTINUE

Next: End

MAINS FUSE 3 AMP

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE F3 DBI

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR FUSE INVESTIGATION F3 DBI

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLOWN

FUSE

Next: End

OPEN CIRCUIT

FAN ASSEMBLY

Next: End

FAULT 2

LINK OUT CONTROLS

Next: End

INPUT FROM FASCIA FUNCTION 2

CONTROL PCB

Next: End

FAULT 1

FAN ASSEMBLY

Next: End

Boiler reaches temperature but system is cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p229

Boiler does not reach temperature

CHARACTERISTIC TEST FROM CH OPERATION

Next: p239

Boiler noisy

CHARACTERISTIC TEST FROM CH OPERATION

Next: p233

27/11/2017 14:40:46 1709_1_50_1 09/01/2018 08:44:08

30/11/2017 09:21:03

Next: End

BLOWING FUSES

PCBS

Next: End

GAS VALVE VOLTAGE

ENSURE DHW IS CALLING FOR HEAT

Next: p193, !f188

SPARK ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: p206, !f203

FAN VOLTS

{ISOLATEMAINSPOWER}<

Next: p261, f216

FLOW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE RED AND GREEN LEADS FROM THE FLOW TEMPERATURE SENSOR

Next: p217, !f218

FLOW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE RED AND GREEN LEADS FROM THE FLOW TEMPERATURE SENSOR

Next: p251, !f252

FLUE

Next: !p271, !f272

SPARK ELECTRODE AND LEAD CONDITION

{ISOLATEMAINSPOWER}

Next: p449, !f283

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p287, !f288

OBSERVATION APS FITTED

Next: p296, f309

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: !p299, !f300

SPARK ELECTRODE AND LEAD CONDITION

{ISOLATEMAINSPOWER}

Next: p446, !f308

PCB DBI VOLTAGE INPUT

{ISOLATEMAINSPOWER}
ENSURE DHW IS CALLING FOR HEAT
GAIN ACCESS TO PCB

Next: p310, !f311

SPARK ELECTRODE AND LEAD CONDITION

{ISOLATEMAINSPOWER}

Next: p443, !f317

PUMP VOLTS

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB

Next: !p393, f394

SYSTEM PRESSURE

Next: p395, !f396

TRANSFORMER INPUT VOLTAGE

Next: !p415, !f416

EXTERNAL CONTROLS INPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: !p432, f433

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: p434, f435

MAINS POWER SUPPLY FUSE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE LOCATED IN FUSED SPUR

Next: !p436, f541

RESISTANCE PUMP AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN11 FROM THE PCB

Next: p504, f505

RESISTANCE PUMP HARNESS

{ISOLATEMAINSPOWER}<

Next: !p506, !f507

RESISTANCE GAS VALVE HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN1 FROM THE DBI PCB.
REMOVE CONNECTOR FROM GAS VALVE.

Next: !p510, !f511

RESISTANCE FAN HARNESS DC

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN4 FROM THE PCB.
REMOVE CONNECTOR FROM THE FAN.

Next: !p514, !f515

RESISTANCE TRANSFORMER HARNESS DC SIDE

{ISOLATEMAINSPOWER}<

Next: !p518, !f519

RESISTANCE SENSOR FLUE HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN9 FROM PCB.
REMOVE BOTH WIRES FROM THE FLUE STAT.

Next: !p522, !f523

RESISTANCE SENSOR FLOW OVERHEAT HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN9 FROM PCB
REMOVE WIRES FROM FLOW OVERHEAT STAT.

Next: !p526, !f527

RESISTANCE SYSTEM PRESSURE SWITCH HARNESS

{ISOLATEMAINSPOWER}<

Next: !p530, !f531

FURTHER INVESTIGATION FUSE F1

THE INFORMATION PROV

Next: !p533, !f534

FURTHER INVESTIGATION FUSE F1

THE INFORMATION PROV

Next: !p536, !f537

FURTHER INVESTIGATION FUSE F2

THE INFORMATION PROV

Next: !p539, !f540

FURTHER INVESTIGATION MAIN FUSE 3AMP

THE INFORMATION PROV

Next: !p542, !f543

FURTHER INVESTIGATION FUSE F3 DBI

THE INFORMATION PROV

Next: !p545, !f546

FURTHER INVESTIGATION FUSE F3 DBI

THE INFORMATION PROV

Next: !p548, !f549

RESISTANCE FAN COIL

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN4 FROM PCB.

Next: p606, f602

RESISTANCE FAN HARNESS DC

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN4 FROM THE PCB.
REMOVE CONNECTOR FROM THE FAN.

Next: !p603, !f604

EXTERNAL CONTROLS OUTPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: p608, f609

EXTERNAL CONTROLS INPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: !p610, !f611

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p196, !f195

GAS VALVE OPENS

ENSURE DHW IS CALLING FOR HEAT

Next: p279, !f198

ELECTRODE LEAD

{ISOLATEMAINSPOWER}
REMOVE THE ELECTRODE LEAD

Next: p284, !f210

RETURN SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE BLUE AND BLACK LEADS FROM THE RETURN SENSOR

Next: !p225, !f220

SYSTEM BYPASS

Next: p236, !f249

PUMP LIMPET TEST

Next: p244, !f245

PUMP LIMPET TEST

Next: !p237, !f238

FLOW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE RED AND GREEN LEADS FROM THE FLOW TEMPERATURE SENSOR

Next: p240, !f241

RETURN SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE BLUE AND BLACK LEADS FROM THE RETURN SENSOR

Next: !p242, !f243

SYSTEM BYPASS

Next: p246, !f248

SYSTEM TEMPERATURE

Next: !p255, f250

RETURN SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE BLUE AND BLACK LEADS FROM THE RETURN SENSOR

Next: !p253, !f254

FAN PRESSURE

{ISOLATEMAINSPOWER}<

Next: p262, f263

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p264, !f265

REMOVE LEAD FROM CONDENSE

{ISOLATEMAINSPOWER}<

Next: !p280, f281

REMOVE LEAD FROM CONDENSE 3

{ISOLATEMAINSPOWER}
REMOVE YELLOW WIRE FROM THE CONDENSE TRAP AND MAKE SAFE

Next: !p285, f286

CONDENSATE PIPE

Next: p289, !f290

FLUE

Next: p291, !f292

BURNER

{ISOLATEMAINSPOWER}

Next: !p293, !f294

AIR PRESSURE SWITCH PROVING

{ISOLATEMAINSPOWER}<

Next: p297, f298

PCB DBI VOLTAGE INPUT

{ISOLATEMAINSPOWER}
ENSURE DHW IS CALLING FOR HEAT
GAIN ACCESS TO PCB

Next: p301, !f302

FUSE DBI RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE FROM THE DBI PCB

Next: p303, f547

REMOVE LEAD FROM CONDENSE 2

{ISOLATEMAINSPOWER}<

Next: !p305, f306

FUSE DBI RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE FROM THE DBI PCB

Next: p312, f544

REMOVE LEAD FROM CONDENSE 2

{ISOLATEMAINSPOWER}<

Next: !p314, f315

EXTERNAL CONTROLS OUTPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: p397, f431

SYSTEM PRESSURE SWITCH RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT BLUE AND YELLOW LEADS FROM THE SYSTEM PRESSURE SWITCH

Next: p411, !f412

TRANSFORMER OUTPUT VOLTAGE

Next: p413, f414

THERMAL FUSE

{ISOLATEMAINSPOWER}
REMOVE FUSE FROM THE TERMINAL STRIP ON THE TRANSFORMER

Next: p417, !f418

MAIN FUSE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM CONTROL BOARD

Next: p419, f535

FUSE F2 RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE F2 FROM CONTROL BOARD

Next: p421, f538

SENSOR FLUE TEMPERATURE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE GREEN AND YELLOW LEADS FROM THE FLUE TEMPERATURE SENSOR

Next: p423, !f424

SENSOR FLOW OVERHEAT RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT RED AND BLACK LEADS FROM THE FLOW OVERHEAT SENSOR

Next: p425, !f426

FACIA PCB VOLTS INPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB

Next: p427, !f428

ON/OFF SWITCH OUTPUT

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR MARKED CN3 DISPLAY FROM
THE MAIN PCB

Next: !p429, !f430

MAIN FUSE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM CONTROL BOARD

Next: !p438, f532

INSPECTION ELECTRODE EARTH LEAD

{ISOLATEMAINSPOWER}

Next: !p444, !f445

INSPECTION ELECTRODE EARTH LEAD

{ISOLATEMAINSPOWER}

Next: !p447, !f448

INSPECTION ELECTRODE EARTH LEAD

{ISOLATEMAINSPOWER}

Next: !p450, !f451

RESISTANCE GAS VALVE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN1 FROM DBI PCB

Next: p508, f509

RESISTANCE FAN AND HARNESS DC FUSE INVESTIGATION

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN4 FROM PCB

Next: p512, f513

RESISTANCE TRANSFORMER AND HARNESS DC SIDE

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN5 FROM PCB.

Next: p516, f517

RESISTANCE SENSOR FLUE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN9 FROM PCB.

Next: p520, f521

RESISTANCE SENSOR FLOW OVERHEAT AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN9 FROM THE PCB.

Next: p524, f525

RESISTANCE SYSTEM PRESSURE SWITCH AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR CN9 FROM THE PCB

Next: !p550, f529

FAN VOLTS

{ISOLATEMAINSPOWER}<

Next: !p620, f607

FLOW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE RED AND GREEN LEADS FROM THE FLOW TEMPERATURE SENSOR

Next: p612, !f613

RETURN SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE BLUE AND BLACK LEADS FROM THE RETURN SENSOR

Next: p614, !f615

FACIA PCB VOLTS INPUT

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB

Next: p616, !f617

ON/OFF SWITCH OUTPUT

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR MARKED CN3 DISPLAY FROM
THE MAIN PCB

Next: !p618, !f619

System Information

Total Tests: 207

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control