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:

BRITISH GAS ICC (INTELLIGENT CONDENSING COMBI)

WARNING - IMPORTA

Next: &93, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

BRITISH GAS ICC (INTELLIGENT CONDENSING COMBI)

G.C. NUMBER 47 047 1

Next: &95, !f94

SYSTEM CHECKS

PLEASE ENSURE THE FOLLOWING SYSTEM CHECKS ARE COMPLETED

Next: &97, !f96

PREHEAT PUMP RUNS

ENSURE THERE IS A DE

Next: &165, f123

COMBUSTION FAN RUNS

ENSURE THERE IS A DE

Next: &100, ?202, ?204

PREHEAT BURNER IGNITION

ENSURE THERE IS A DE

Next: &117, ?101, ?103

PREHEAT BURNER ESTABLISHES

ENSURE THERE IS A DE

Next: &193, f118

RESET SWITCH OPERATION

Next: &98, f166

PREHEAT COMPLETES

ENSURE THERE IS A DE

Next: &267, ?259, ?261, ?263

CH OPERATION

ENSURE ALL HEATING CONTROLS ARE CALLING AND THERMAL STORE IS UP TO TEMPERATURE

Next: &nff, ?300, ?302, ?304, ?306, ?511

DHW OPERATION

Next: &266, ?292, ?294, ?296

FAULT

Next: End

BLOWN

FUSE F1

Next: End

BLOWN

FUSE F2

Next: End

FAULT

RIBBON CABLE

Next: End

DAMAGE

RIBBON CABLE

Next: End

DISPLAY SU

CONTROL UNIT PCB

Next: End

FAULT

AIR PRESSURE SWITCH TUBE

Next: End

START FUNCTION

VENTURI

Next: End

FAULT

FLOW THERMISTOR

Next: End

RES

RETURN THERMISTOR

Next: End

RESISTAMCE 9

HOT WATER THERMISTOR

Next: End

DAMAGE

FAN HARNESS

Next: End

GAS VALVE FUNCTION

CONTROL UNIT PCB

Next: End

RESISTANCE

GAS VALVE

Next: End

POOR

GAS INLET PRESSURE

Next: End

BLOCKED

INJECTOR

Next: End

FAULT

ELECTRODE ASSEMBLY (SPARK ELECTRODE)

Next: End

BLOCKED 2

CONDENSATE SIPHON

Next: End

FLUE2

FLUE

Next: End

SPINDLE

DIVERTER VALVE BODY

Next: End

DIVERTER VALVE VOLTAGE

CONTROL UNIT PCB

Next: End

LEAKING

DRAW OFFS OR LEAKING PIPE WORK

Next: End

RESISTANCE

HOT WATER THERMISTOR

Next: End

EFFICIENCY

PUMP

Next: End

BLOCKED

CONDENSATE SIPHON

Next: End

FAULT 2

ELECTRODE ASSEMBLY (SPARK ELECTRODE)

Next: End

FAULT

SPARK ELECTRODE LEAD

Next: End

FAULT 2

DHW FLOW REGULATOR

Next: End

FAULT 3

FLOW THERMISTOR

Next: End

FAULT 4

FLOW THERMISTOR

Next: End

RES 3

RETURN THERMISTOR

Next: End

RESISTANCE 5

HOT WATER THERMISTOR

Next: End

POOR 3

GAS INLET PRESSURE

Next: End

DHW CALIBRATION 3

CONTROL UNIT PCB

Next: End

FAULT 2 SPEED2

FAN

Next: End

EFFICIENCY 2

PUMP

Next: End

FAULT 3

DHW FLOW REGULATOR

Next: End

FAULT 6

FLOW THERMISTOR

Next: End

RES 4

RETURN THERMISTOR

Next: End

RESISTANCE 6

HOT WATER THERMISTOR

Next: End

POOR 4

GAS INLET PRESSURE

Next: End

DHW CALIBRATION 4

CONTROL UNIT PCB

Next: End

FAULT 2 SPEED 3

FAN

Next: End

EFFICIENCY 3

PUMP

Next: End

DEMAND

Next: End

LEAKING 2

DRAW OFFS OR LEAKING PIPE WORK

Next: End

RESISTANCE 7

HOT WATER THERMISTOR

Next: End

SPINDLE 2

DIVERTER VALVE BODY

Next: End

FAULT

Next: End

DEMAND 2

Next: End

LEAKING 3

DRAW OFFS OR LEAKING PIPE WORK

Next: End

RESISTANCE 8

HOT WATER THERMISTOR

Next: End

SPINDLE 3

DIVERTER VALVE BODY

Next: End

FAULT 2

Next: End

BLOCKED 4

CONDENSATE SIPHON

Next: End

BLOCKED 5

CONDENSATE SIPHON

Next: End

FAULT 5

FLOW THERMISTOR

Next: End

RES 5

RETURN THERMISTOR

Next: End

FAULT 3

Next: End

EFFICIENCY 4

PUMP

Next: End

EFFICIENCY 5

PUMP

Next: End

BLOCKED

DHW FILTER

Next: End

FAULT

DHW FLOW REGULATOR

Next: End

INCORRECT

DHW INLET SERVICE VALVE

Next: End

FAN FUNCTION 2

CONTROL UNIT PCB

Next: End

FAULT

HOT WATER THERMISTOR POSITION

Next: End

FAULT 2

HOT WATER THERMISTOR POSITION

Next: End

FAULT 3

HOT WATER THERMISTOR POSITION

Next: End

DEMAND 3

Next: End

PREHEAT BURNER IGNITION

AIR PRESSURE SWITCH TUBE

Next: End

BLOCKED 3

CONDENSATE SIPHON

Next: End

FLUE

FLUE

Next: End

SPARK ELECTRODE LEAD

SPARK ELECTRODE LEAD

Next: End

FAULT 3

ELECTRODE ASSEMBLY (SPARK ELECTRODE)

Next: End

FAULT

ELECTRICAL SAFETY CHECKS

Next: End

FAULT

SYSTEM CHECKS

Next: End

MOTOR

PUMP

Next: End

FAULT

DISPLAY BOARD

Next: End

RESET FUNCTION

CONTROL UNIT PCB

Next: End

PUMP FUNCTION

CONTROL UNIT PCB

Next: End

OC FAULT

AIR PRESSURE SWITCH

Next: End

FAULT

FAN

Next: End

FAN FUNCTION

CONTROL UNIT PCB

Next: End

MECH

GAS VALVE

Next: End

FAULT

BURNER

Next: End

BODY

DIVERTER VALVE BODY

Next: End

FAULTY

DIVERTER VALVE HEAD

Next: End

PRE HEAT FUNCTION

CONTROL UNIT PCB

Next: End

NOISY

PRIMARY HEAT EXCHANGER

Next: End

FAULT 2

THERMAL STORE HEAT EXCHANGER

Next: End

DHW CALIBRATION

CONTROL UNIT PCB

Next: End

MECH 3

GAS VALVE

Next: End

FAULT 4

THERMAL STORE HEAT EXCHANGER

Next: End

FAULT 3

THERMAL STORE HEAT EXCHANGER

Next: End

MECH 4

GAS VALVE

Next: End

FAULT 5

THERMAL STORE HEAT EXCHANGER

Next: End

CH FUNCTION

CONTROL UNIT PCB

Next: End

FAULTY 2

DIVERTER VALVE HEAD

Next: End

CH FUNCTION 2

CONTROL UNIT PCB

Next: End

FAULTY 3

DIVERTER VALVE HEAD

Next: End

NOISY 2

PRIMARY HEAT EXCHANGER

Next: End

FAULT

Next: End

FAULT

EXPANSION VESSEL

Next: End

FLAME SENSE

CONTROL UNIT PCB

Next: End

FAULT

THERMAL STORE HEAT EXCHANGER

Next: End

OPEN CIRCUIT

GAS VALVE

Next: End

CH FUNCTION 3

CONTROL UNIT PCB

Next: End

AIR DETECT

AIR PRESSURE SWITCH

Next: End

CONTROL UNIT PCB

CONTROL UNIT PCB

Next: End

SPARKING PRESENT

CHARACTERISTIC TEST FROM PREHEAT BURNER IGNITION

Next: p227

SPARKING NOT PRESENT

CHARACTERISTIC TEST FROM PREHEAT BURNER IGNITION

Next: p537

COMBUSTION FAN RUNS FOR 5 OR 6 SECONDS THEN STOPS

CHARACTERISTIC TEST FROM PREHEAT COMBUSTION FAN RUNS

Next: p203

COMBUSTION FAN DOES NOT RUN

CHARACTERISTIC TEST FROM PREHEAT COMBUSTION FAN RUNS

Next: p209

PREHEAT DOES NOT COMPLETE RADIATORS HEAT

CHARACTERISTIC TEST FROM PREHEAT COMPLETES

Next: p260

PREHEAT DOES NOT COMPLETE RADIATORS COLD

CHARACTERISTIC TEST FROM PREHEAT COMPLETES

Next: p262

BOILER NOISY ON PREHEAT

CHARACTERISTIC TEST FROM PREHEAT COMPLETES

Next: p264

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p293

DHW TOO COOL, RADIATORS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p335

DHW RUNS HOT AND THEN COOL

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p409

CH NOISY OPERATION

CHARACTERISTIC TEST FROM CH OPERATION

Next: p478

RADIATORS DO NOT HEAT BUT BOILER REACHES TEMPERATURE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p460

BOILER AND RADIATORS INSUFFICIENT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p305

BOILER WILL NOT CHANGE TO HEATING MODE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p307

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p512

12/02/2018 10:19:36 1802_1_50_1 06/03/2018 13:32:26

19/02/2018 15:24:11

Next: End

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}
DISCONNECT ELECTRODE LEADS

Next: p119, !f291

PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p124, f125

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}

Next: p126, !f127

RESET DISPLAY

Next: p167, f168

FUSE F2 (RESISTANCE)

{ISOLATEMAINSPOWER}
REMOVE FUSE F2 FROM ITS HOLDER

Next: p169, !f170

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: p212, !f213

FAN HARNESS

{ISOLATEMAINSPOWER}

Next: !p224, !f225

INJECTOR CHECK

{ISOLATEMAINSPOWER}<

Next: !p244, !f246

VOLTAGE DIVERTER VALVE DHW

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE HEAD

Next: !p273, !f274

DHW FLOW REGULATOR

{ISOLATEMAINSPOWER}<

Next: !p377, !f380

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p402, !f403

DHW FLOW REGULATOR

{ISOLATEMAINSPOWER}<

Next: !p412, !f413

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p424, !f425

HOT WATER THERMISTOR (POSITION)

{ISOLATEMAINSPOWER}

Next: p452, !f531

EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: p466, !f467

HOT WATER THERMISTOR (POSITION)

{ISOLATEMAINSPOWER}

Next: p470, !f532

DHW INLET SERVICE VALVE

{ISOLATEMAINSPOWER}<

Next: p520, !f525

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: p540, !f541

SPARK ELECTRODE

{ISOLATEMAINSPOWER}
REMOVE ELECTRODE ASSEMBLY

Next: p251, !f290

FUSE F1 (RESISTANCE)

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM ITS HOLDER

Next: !p192, !f129

RIBBON CABLE AND CONNECTIONS

{ISOLATEMAINSPOWER}

Next: !p175, !f176

RIBBON CABLE AND CONNECTIONS

{ISOLATEMAINSPOWER}

Next: p171, !f172

VOLTAGE FROM PCB TO DISPLAY

DISCONNECT PLUG MARKED X8 FROM THE PCB

Next: !p173, !f191

GAS VALVE VOLTAGE

ATTACH MULTIMETER PR

Next: !p528, !f529

AIR PRESSURE SWITCH RESISTANCE (NO AIR)

{ISOLATEMAINSPOWER}
DISCONNECT GREEN LEADS FROM THE AIR PRESSURE SWITCH

Next: p210, f211

FLOW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE BLACK LEADS FROM THE FLOW THERMISTOR

Next: p216, !f217

VENTURI

{ISOLATEMAINSPOWER}
REMOVE VENTURI FROM FAN HOUSING

Next: !p214, !f215

RETURN THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT BLACK WIRES FROM THE THERMISTOR

Next: p218, !f219

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: p220, !f221

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p222, f223

GAS VALVE VOLTAGE

ATTACH MULTIMETER PR

Next: p234, !f229

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR FROM GAS VALVE

Next: p239, !f236

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p241, !f240

GAS FLOW CHECK

GAS METER TEST DIAL WILL HAVE TO BE VIEWED DURING IGNITION SEQUENCE

Next: p242, f243

SPARK ELECTRODE

{ISOLATEMAINSPOWER}
REMOVE ELECTRODE ASSEMBLY

Next: !p247, !f248

CONDENSATE SIPHON

{ISOLATEMAINSPOWER}

Next: p252, !f253

FLUE CHECK

Next: !p513, !f255

DIVERTER VALVE HEAD DHW POSITION

ENSURE THERE IS A DE

Next: p269, f272

HOT WATER THERMISTOR (POSITION)

{ISOLATEMAINSPOWER}

Next: p279, !f530

PUMP LIMPET TEST

Next: p285, !f286

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}<

Next: !p270, !f271

DRAW OFFS OR LEAKING PIPE WORK

{ISOLATEMAINSPOWER}

Next: p280, !f281

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: !p283, !f284

CONDENSATE SIPHON

{ISOLATEMAINSPOWER}

Next: !p287, !f288

DHW FLOW RATE

Next: p383, f519

FLOW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE BLACK LEADS FROM THE FLOW THERMISTOR

Next: p498, !f499

EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: p449, !f437

DHW FLOW RATE

Next: p389, f348

FLOW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE BLACK LEADS FROM THE FLOW THERMISTOR

Next: !p384, !f386

FLOW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE BLACK LEADS FROM THE FLOW THERMISTOR

Next: p390, !f391

RETURN THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT BLACK WIRES FROM THE THERMISTOR

Next: p392, !f393

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: p394, !f395

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p396, !f397

GAS RATE

Next: p406, f399

FAN IMPELLER

{ISOLATEMAINSPOWER}

Next: !p404, !f405

PUMP LIMPET TEST

Next: !p407, !f408

DHW FLOW RATE

Next: p410, f411

FLOW THERMISTOR

{ISOLATEMAINSPOWER}
REMOVE THE BLACK LEADS FROM THE FLOW THERMISTOR

Next: p414, !f415

RETURN THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT BLACK WIRES FROM THE THERMISTOR

Next: p416, !f417

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: p418, !f419

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH U-GAUGE TO THE INLET PRESSURE TEST POINT

Next: p420, !f421

GAS RATE

Next: p422, f423

PUMP LIMPET TEST

Next: !p428, !f429

FAN IMPELLER

{ISOLATEMAINSPOWER}

Next: !p426, !f427

VOLTAGE DIVERTER VALVE CH

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE HEAD

Next: p450, f451

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}<

Next: !p458, !f459

DRAW OFFS OR LEAKING PIPE WORK

{ISOLATEMAINSPOWER}

Next: p454, !f455

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: !p456, !f457

DIVERTER VALVE HEAD CH POSITION

ENSURE THERMAL STORE IS UP TO TEMPERATURE

Next: p461, f465

BYPASS CHECKS

Next: p489, !f463

VOLTAGE DIVERTER VALVE CH

{ISOLATEMAINSPOWER}
REMOVE DIVERTER VALVE HEAD

Next: p468, f469

DIVERTER VALVE SPINDLE

{ISOLATEMAINSPOWER}<

Next: !p476, !f477

DRAW OFFS OR LEAKING PIPE WORK

{ISOLATEMAINSPOWER}

Next: p472, !f473

HOT WATER THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT THE HOT WATER THERMISTOR AT ITS INLINE CONNECTOR

Next: !p474, !f475

BYPASS CHECKS

Next: p488, !f480

PUMP LIMPET TEST

Next: p492, !f506

PUMP LIMPET TEST

Next: p495, !f507

CONDENSATE SIPHON

{ISOLATEMAINSPOWER}

Next: !p493, !f494

CONDENSATE SIPHON

{ISOLATEMAINSPOWER}

Next: !p508, !f497

RETURN THERMISTOR

{ISOLATEMAINSPOWER}
DISCONNECT BLACK WIRES FROM THE THERMISTOR

Next: p500, !f501

BYPASS CHECKS

Next: p502, !f504

EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: !p535, !f536

DHW INLET FILTER

{ISOLATEMAINSPOWER}<

Next: p521, !f522

DHW FLOW REGULATOR

{ISOLATEMAINSPOWER}<

Next: !p523, !f524

AIR PRESSURE SWITCH AIR DETECT

{ISOLATEMAINSPOWER}<

Next: p538, f539

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}
DISCONNECT ELECTRODE LEADS

Next: p546, !f547

CONDENSATE SIPHON

{ISOLATEMAINSPOWER}

Next: p542, !f543

FLUE CHECK

Next: !p544, !f545

ELECTRODE

{ISOLATEMAINSPOWER}
REMOVE ELECTRODE ASSEMBLY

Next: !p548, !f549

System Information

Total Tests: 226

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control