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:

WORCESTER 28 SI II

WARNING - IMPORTA

Next: &6, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

DHW FAN RUNS

DHW TEMPERATURE CONTROL SET TO MAXIMUM

Next: &11, ?40, ?651, ?653

DHW FLOW RATE

{ISOLATEMAINSPOWER}

Next: &3, f17

SYSTEM CHECKS

Next: &4, !f16

WORCESTER 28 SI II

{ISOLATEMAINSPOWER}<

Next: &5, !f15

CH OPERATION

CH TEMPERATURE CONTROL SET TO MAXIMUM

Next: &13, ?254, ?256, ?258

DHW OPERATION

DHW TEMPERATURE CONTROL SET TO MAXIMUM

Next: &448, ?248, ?250, ?252, ?420

BURNER FULL RATE

{ISOLATEMAINSPOWER}<

Next: &8, f23

DHW BURNER ESTABLISHED

Next: &9, f22

DHW BURNER IGNITES

DHW TEMPERATURE CONTROL SET TO MAXIMUM

Next: &10, ?129, ?131

OVERRUNS

Next: &14, f27

SYSTEM PRESSURE RISE

Next: &12, !f26

AUTO FROST

{ISOLATEMAINSPOWER}<

Next: &nff, f30

CH DEMAND

CH TEMPERATURE CONTROL SET TO MAXIMUM

Next: &7, f512

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

BURNER ESTABLISHES

FLAME SENSE ELECTRODE

Next: End

BURNER ESTABLISHES

FLAME SENSE ELECTRODE LEAD

Next: End

SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

DHW BURNER IGNITES (SPARKING)

GAS INLET PRESSURE

Next: End

DHW BURNER IGNITES (SPARKING)

CONTROL PCB

Next: End

DHW BURNER IGNITES (SPARKING) ELECTRICAL

GAS VALVE

Next: End

DHW BURNER IGNITES (SPARKING)

ELECTRODE IGNITION

Next: End

OVERRUNS

PRIMARY SENSOR

Next: End

DHW BURNER IGNITES SPARKING PRESENT

OVERHEAT THERMOSTAT

Next: End

AUTOFROST PROTECTION

PRIMARY SENSOR

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW FLOW RATE

DHW FLOW REGULATOR

Next: End

BURNER FULL RATE

GAS INLET PRESSURE

Next: End

BURNER ESTABLISHES

GAS INLET PRESSURE

Next: End

DHW FLOW RATE

DHW SERVICE VALVE

Next: End

BURNER ESTABLISHES

HEAT EXCHANGER FLUE WAYS

Next: End

BURNER ESTABLISHES

FLUE

Next: End

BURNER ESTABLISHES

PRIMARY SENSOR

Next: End

BURNER FULL RATE ELECTRICAL

GAS VALVE

Next: End

BURNER FULL RATE

PRIMARY SENSOR

Next: End

BURNER FULL RATE

DHW SENSOR

Next: End

DHW OPERATION

PRIMARY SENSOR

Next: End

DHW OPERATION

DHW SENSOR

Next: End

DHW OPERATION

BURNER MANIFOLD

Next: End

DHW OPERATION DHW TOO HOT

PRIMARY SENSOR

Next: End

DHW OPERATION DHW TOO HOT

DHW SENSOR

Next: End

DHW OPERATION DHW RUNS HOT THEN COLD

PRIMARY SENSOR

Next: End

DHW OPERATION DHW RUNS HOT THEN COLD

OVERHEAT THERMOSTAT

Next: End

DHW OPERATION DHW RUNS HOT THEN COLD

DHW SENSOR

Next: End

CH OPERATION BOILER COOL RADIATORS COOL

PRIMARY SENSOR

Next: End

CH DEMAND EXTERNAL CONTROLS FITTED

Next: End

CH OPERATION CH NOISY OPERATION

PUMP

Next: End

CH OPERATION CH NOISY OPERATION

INTEGRAL BYPASS

Next: End

CH OPERATION CH NOISY OPERATION

PRIMARY SENSOR

Next: End

CH OPERATION CH NOISY OPERATION

CONTROL PCB

Next: End

CH OPERATION CH NOISY OPERATION PUMP VOLTAGE

CONTROL PCB

Next: End

CH OPERATION BOILER TO TEMPERATURE RADIATORS COOL

PUMP

Next: End

CH OPERATION BOILER COOL RADIATORS COOL PUMP VOLTAGE

CONTROL PCB

Next: End

CH DEMAND PROGRAMMER FITTED

CONTROL PCB

Next: End

DHW FAN RUNS (FAN RUNS)

DHW SENSOR

Next: End

FAN RUNS CH (FAN RUNS)

AIR PRESSURE SWITCH TUBES

Next: End

DHW FAN RUNS (FAN RUNS)

VENTURI (AIR FLOW SENSOR)

Next: End

DHW FAN RUNS (FAN RUNS)

FLUE

Next: End

DHW FAN RUNS (FAN RUNS)

OVERHEAT THERMOSTAT

Next: End

DHW FAN RUNS (FAN RUNS FOR VERY SHORT TIME)

CONTROL PCB

Next: End

DHW BURNER IGNITES (NO SPARKING)

AIR PRESSURE SWITCH TUBES

Next: End

DHW BURNER IGNITES (NO SPARKING)

VENTURI (AIR FLOW SENSOR)

Next: End

DHW BURNER IGNITES (NO SPARKING)

FLUE

Next: End

DHW BURNER IGNITES (NO SPARKING)

ELECTRODE IGNITION LEADS

Next: End

DHW BURNER IGNITES (NO SPARKING)

ELECTRODE IGNITION

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

FUSE F1

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

FUSE F2

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

TRANSFORMER

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

AIR PRESSURE SWITCH TUBES

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

VENTURI (AIR FLOW SENSOR)

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

FLUE

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

PRIMARY SENSOR

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

CODE PLUG

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

FLOW SWITCH

Next: End

FAN

HARNESS

Next: End

DHW OPERATION DHW NOISY OPERATION

HEAT EXCHANGER

Next: End

DHW BURNER IGNITES (SPARKING) MECHANICAL

GAS VALVE

Next: End

DHW BURNER IGNITES (SPARKING)

BURNER MANIFOLD

Next: End

OVERRUNS

CONTROL PCB

Next: End

AUTO FROST PROTECTION

CONTROL PCB

Next: End

DHW FLOW RATE

HEAT EXCHANGER

Next: End

BURNER ESTABLISHES

CONTROL PCB

Next: End

BURNER FULL RATE

CONTROL PCB

Next: End

BURNER FULL RATE MECHANICAL

GAS VALVE

Next: End

DHW OPERATION DHW TOO COLD

HEAT EXCHANGER

Next: End

DHW OPERATION DHW RUNS HOT THEN COLD

CONTROL PCB

Next: End

DHW OPERATION DHW TOO HOT

CONTROL PCB

Next: End

CH OPERATION BOILER COOL RADIATORS COOL

CONTROL PCB

Next: End

CH DEMAND

Next: End

CH OPERATION CH NOISY OPERATION

HEAT EXCHANGER

Next: End

CH OPERATION BOILER TO TEMPERATURE RADIATORS COOL

Next: End

CH DEMAND PROGRAMMER FITTED

INTEGRAL PROGRAMMER

Next: End

DHW FAN RUNS (FAN RUNS)

AIR PRESSURE SWITCH

Next: End

DHW FAN RUNS (FAN RUNS)

CONTROL PCB

Next: End

DHW FAN RUNS (FAN RUNS FOR VERY SHORT TIME)

FAN ASSEMBLY

Next: End

DHW BURNER IGNITES (NO SPARKING)

AIR PRESSURE SWITCH

Next: End

DHW BURNER IGNITES (NO SPARKING)

CONTROL PCB

Next: End

DHW FAN RUNS 2

CONTROL PCB

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

CONTROL PCB

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

AIR PRESSURE SWITCH

Next: End

DHW FAN RUNS

CONTROL PCB

Next: End

DHW FAN RUNS (FAN DOES NOT RUN)

FAN ASSEMBLY

Next: End

FAN NEUTRAL

CONTROL PCB

Next: End

Sparking present

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p267

No sparking

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p669

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p249

DHW too cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p251

DHW too hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p253

CH noisy operation

CHARACTERISTIC TEST FROM CH OPERATION

Next: p600

Boiler to temperature, radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p611

Boiler and radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p259

Fan does not run

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p683

DHW runs hot then cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p424

Fan runs for approximately 2 seconds then stops

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p652

Fan runs for approximately 35 seconds then stops

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p654

MAINS VOLTAGE ABSENT ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE TO FAN HIGH SPEED

Next: p717

MAINS VOLTAGE PRESENT BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE TO FAN HIGH SPEED

Next: !p751

07/01/2013 09:01:49 1303_2_30_2 10/01/2013 13:26:22

07/01/2013 14:23:30

Next: End

DHW STOP COCK

{ISOLATEMAINSPOWER}
SET THE DHW STOP COCK TO FULLY OPEN

Next: p33, !f39

FLAME SENSE ELECTRODE

{ISOLATEMAINSPOWER}

Next: p244, !f245

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p382, !f383

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: !p28, !f29

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p271, !f272

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: !p31, !f32

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p401, !f402

EXTERNAL CONTROLS VOLTAGE OUTPUT

{ISOLATEMAINSPOWER}

Next: p517, f514

EXTERNAL CONTROLS VOLTAGE INPUT

{ISOLATEMAINSPOWER}

Next: !p515, !f516

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p659, !f660

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p672, !f673

EXTERNAL CONTROLS VOLTAGE INPUT

{ISOLATEMAINSPOWER}

Next: p720, f721

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}

Next: p722, !f723

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p732, !f733

FLAME SENSE ELECTRODE LEAD

{ISOLATEMAINSPOWER}<

Next: p386, !f247

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p410, !f411

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p416, !f417

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: !p444, !f445

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: p268, !f308

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p269, f270

IGNITION ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p277, !f278

GAS VALVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p273, !f274

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE PLUG CONNECTOR ST16 FROM THE PCB

Next: !p275, !f276

DHW INLET FILTER

{ISOLATEMAINSPOWER}<

Next: p35, !f36

DHW FLOW REGULATOR

{ISOLATEMAINSPOWER}
ENSURE APPLIANCE IS DRAINED AND DISCHARGED

Next: !p37, !f38

GAS VALVE MODULATING SOLENOID VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p397, f398

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p387, !f394

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p388, !f389

HEAT EXCHANGER (FLUE WAYS)

{ISOLATEMAINSPOWER}

Next: p390, !f391

FLUE

Next: !p392, !f393

GAS VALVE MODULATING SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE PLUG CONNECTOR ST16 FROM THE PCB

Next: !p409, !f400

DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE DHW SENSOR

Next: !p403, !f404

DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE DHW SENSOR

Next: p412, !f413

GAS RATE

Next: !p414, !f415

DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE DHW SENSOR

Next: !p431, !f419

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: p425, !f428

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p426, !f427

DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE DHW SENSOR

Next: !p429, !f430

INTEGRAL PROGRAMMER

{ISOLATEMAINSPOWER}<

Next: !p649, !f650

PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p634, !f643

PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p645, !f648

PUMP LIMPET TEST

Next: p635, !f636

INTEGRAL BYPASS

{ISOLATEMAINSPOWER}
TURN OFF DHW STOP COCK
DRAIN AND DISCHARGE APPLIANCE

Next: p637, !f638

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p639, !f640

CH MODULATION

{ISOLATEMAINSPOWER}<

Next: !p641, !f642

PUMP LIMPET TEST

Next: !p646, !f647

VOLTAGE TO FAN (LOW SPEED)

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB, USE ISOLATION MAT AS REQUIRED.

Next: !p667, !f668

DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE DHW SENSOR

Next: p655, !f656

AIR PRESSURE SWITCH PROVING

{ISOLATEMAINSPOWER}<

Next: p657, f658

OVERHEAT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p665, !f666

VENTURI

{ISOLATEMAINSPOWER}

Next: p661, !f662

FLUE

Next: !p663, !f664

AIR PRESSURE SWITCH PROVING

{ISOLATEMAINSPOWER}<

Next: p670, f671

IGNITION ELECTRODE LEADS

{ISOLATEMAINSPOWER}
REMOVE THE IGNITION ELECTRODE LEADS

Next: p678, !f679

VENTURI

{ISOLATEMAINSPOWER}

Next: p674, !f675

FLUE

Next: !p676, !f677

IGNITION ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p680, !f681

VOLTAGE TO FAN (HIGH SPEED)

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB, USE ISOLATION MAT AS REQUIRED.

Next: p748, ?713, ?715

VOLTAGE AT FUSE F2 OUTPUT

Next: p718, f719

AIR PRESSURE SWITCH N/O

{ISOLATEMAINSPOWER}
REMOVE THE BLUE WIRE FROM THE AIR PRESSURE SWITCH

Next: p730, f731

FUSE F2

{ISOLATEMAINSPOWER}
REMOVE FUSE F2 FROM THE PCB

Next: p726, !f727

FUSE F1

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM THE PCB

Next: !p724, !f725

TRANSFORMER RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE TRANSFORMER FROM THE CONTROL BOX

Next: !p728, !f729

PRIMARY SENSOR

{ISOLATEMAINSPOWER}
REMOVE ONE OF THE WIRES FROM THE PRIMARY SENSOR

Next: p738, !f739

VENTURI

{ISOLATEMAINSPOWER}

Next: p734, !f735

FLUE

Next: !p736, !f737

CODE PLUG

{ISOLATEMAINSPOWER}
MAIN ON/OFF CONTROL SET TO OFF POSITION

Next: p740, !f741

FLOW SWITCH

{ISOLATEMAINSPOWER}

Next: !p742, !f743

CONTINUITY FAN HARNESS

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR ST1 FROM THE PCB.

Next: !p749, !f750

System Information

Total Tests: 190

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control