XSol Diagnostic System

Interactive Test Sequence Navigator

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:

POTTERTON PROFILE PRIMA AND VARIANTS

GLOBALLY REPLACED

Next: &11, *

PUMP OVERRUN

Next: &nff, !f341

BOILER TEMPERATURE REACHED

BOILER THERMOSTAT IN

Next: &1, ?151, ?153

CENTRAL HEATING OPERATION

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: &2, ?14, ?16, ?454

HIGH BURNER FLAME

ENSURE THAT THE BOIL

Next: &3, f594

BURNER IGNITES

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: &4, f550

PILOT IGNITES

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: &5, f488

ELECTRODE SPARKING

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: &6, f192

FAN RUNS

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: &7, ?42, ?134

PUMP RUNS

BOILER THERMOSTAT SET TO ITS '0' POSITION

Next: &8, f336

CASE OFF


CASE REMOVAL<

Next: &605, !f21

FUSE INVESTIGATION TREE

NOT USED - HEADER FOR FUSE INVESTIGATION (PCB FUSE)

Next: &nff, f653

MAINS POWER SUPPLY

{GAINPCBACS}

Next: &9, f616

FUSE INVESTIGATION TREE (MAINS)

NOT USED - HEADER FOR FUSE INVESTIGATION (MAINS)

Next: &nff, f624

FAN CYCLING

PCB - ELECTRONIC CONTROL

Next: End

ELECTRODE SPARKING

PRESSURE SWITCH (AIR)

Next: End

ELECTRODE SPARKING

PCB - ELECTRONIC CONTROL

Next: End

ELECTRICAL SAFETY CHECK

ELECTRICAL CHECK

Next: End

IS SYSTEM FULLY PUMPED?

THERMOSTAT - OVERHEAT

Next: End

CH OPERATION NOISY

PUMP

Next: End

CH OPERATION RADS COOL

PUMP

Next: End

CENTRAL HEATING OPERATION - LPG

INJECTOR - BURNER

Next: End

PUMP OVERRUN

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

ELECTRODE SPARKING

RESTRICTOR - AIR PRESSURE SWITCH

Next: End

ELECTRODE SPARKING

AIR PRESSURE SENSING TUBES

Next: End

ELECTRODE SPARKING

AIR PRESSURE SENSING PIPES

Next: End

ELECTRODE SPARKING

FLUE ASSEMBLY

Next: End

IS SYSTEM FULLY PUMPED?

FUSE

Next: End

OVERHEAT INVESTIGATION

PUMP

Next: End

OVERHEAT INVESTIGATION

GAS VALVE

Next: End

HEAT EXCHANGER NOISY

SYSTEM PRESSURE / AIR IN SYSTEM

Next: End

RADS DO NOT HEAT

SYSTEM PRESSURE / AIR IN SYSTEM

Next: End

CH NOISY

Next: End

IS SYSTEM FULLY PUMPED?

RESTRICTOR - AIR PRESSURE SWITCH

Next: End

RADS DO NOT HEAT

Next: End

IS SYSTEM FULLY PUMPED?

AIR PRESSURE SENSING TUBES

Next: End

IS SYSTEM FULLY PUMPED?

AIR PRESSURE SENSING PIPES

Next: End

PILOT IGNITES

OPERATOR COILS (SIT SOLENOID)

Next: End

PILOT IGNITES (SIT)

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (SIT) - VOLTAGE PRESENT

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (SIT)

PILOT INJECTOR

Next: End

PILOT IGNITES

SOLENOID COIL (PILOT)

Next: End

PILOT IGNITES (WHITE ROGERS)

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (HONEYWELL)

PILOT INJECTOR

Next: End

PILOT IGNITES

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (WHITE ROGERS)

PILOT INJECTOR

Next: End

PILOT

GAS INLET PRESSURE

Next: End

BURNER IGNITES (SIT)

LEAD - ELECTRODE

Next: End

BURNER IGNITES (SIT)

ELECTRODE - SPARK

Next: End

BURNER IGNITES (SIT)

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES (SIT) - VOLTAGE PRESENT

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES

OPERATOR COILS (SIT SOLENOID)

Next: End

BURNER IGNITES

LEAD - ELECTRODE

Next: End

BURNER IGNITES

ELECTRODE - SPARK

Next: End

BURNER IGNITES

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES

SOLENOID COIL (MAIN)

Next: End

BURNER IGNITES (WHITE ROGERS)

LEAD - ELECTRODE

Next: End

BURNER IGNITES (WHITE ROGERS)

ELECTRODE - SPARK

Next: End

BURNER IGNITES (WHITE ROGERS)

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES

GAS ARRANGEMENT - WHITE ROGERS

Next: End

MAIN BURNER

GAS INLET PRESSURE

Next: End

HIGH FLAME

GAS INLET PRESSURE

Next: End

FAN DOES NOT RUN

APS VENTURI

Next: End

IS SYSTEM FULLY PUMPED?

BOILER CONTROL THERMOSTAT

Next: End

ELECTRODE SPARKING

APS VENTURI

Next: End

MAINS POWER SUPPLY

Next: End

FUSE INVESTIGATION MAINS

PUMP

Next: End

FUSE INVESTIGATION MAINS

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION MAINS

OPERATOR COILS (SIT SOLENOID)

Next: End

FUSE INVESTIGATIONPILOT SOLENOID MAINS

GAS ARRANGEMENT - WHITE ROGERS

Next: End

PUMP RUNS

Next: End

FUSE INVESTIGATION

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION

OPERATOR COILS (SIT SOLENOID)

Next: End

FUSE INVESTIGATIONPILOT SOLENOID

GAS ARRANGEMENT - WHITE ROGERS

Next: End

PUMP OVERRUN

Next: End

PILOT VALVE NOT CLOSING

GAS VALVE

Next: End

BOILER TEMPERATURE REACHED

BOILER CONTROL THERMOSTAT

Next: End

OUT OF CALIBRATION

THERMOSTAT - OVERHEAT

Next: End

ELECTRODE SPARKING

ELECTRODE - SPARK

Next: End

ELECTRODE SPARKING

LEAD - ELECTRODE

Next: End

CH COOL

INJECTOR - BURNER

Next: End

IS SYSTEM FULLY PUMPED?

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

ELECTRODE SPARKING

FAN ASSEMBLY

Next: End

FUSE

Z REDIRECT

Next: End

FAN RUNS - WILL NOT RESET

THERMOSTAT - OVERHEAT

Next: End

OVERHEAT INVESTIGATION

BOILER CONTROL THERMOSTAT

Next: End

OVERHEAT INVESTIGATION

THERMOSTAT - OVERHEAT

Next: End

OVERHEAT INVESTIGATIONPUMP OVERRUN

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

NO FAULT OVERHEAT INVESTIGATION

NO FAULT - OVERHEAT INVESTIGATION

Next: End

PUMP RUNS

PUMP - NOT RUNNING

Next: End

CENTRAL HEATING OPERATION

EXPANSION VESSEL

Next: End

CENTRAL HEATING OPERATION

HEAT EXCHANGER

Next: End

PILOT IGNITES (SIT)

PCB - ELECTRONIC CONTROL

Next: End

PILOT IGNITES

GAS VALVE (SIT)

Next: End

PILOT IGNITES

PCB - ELECTRONIC CONTROL

Next: End

PILOT IGNITES

GAS VALVE (HONEYWELL)

Next: End

PILOT IGNITES (WHITE ROGERS)

PCB - ELECTRONIC CONTROL

Next: End

PILOT SOLENOID

GAS ARRANGEMENT - WHITE ROGERS

Next: End

IS SYSTEM FULLY PUMPED?

FAN ASSEMBLY

Next: End

BURNER IGNITES (SIT)

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES (SIT)

INJECTOR - BURNER

Next: End

BURNER IGNITES

GAS VALVE (SIT)

Next: End

BURNER IGNITES

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES

INJECTOR - BURNER

Next: End

BURNER IGNITES

GAS VALVE (HONEYWELL)

Next: End

BURNER IGNITES (WHITE ROGERS)

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES (WHITE ROGERS)

INJECTOR - BURNER

Next: End

HIGH BURNER

GAS VALVE

Next: End

IS SYSTEM FULLY PUMPED?

PRESSURE SWITCH (AIR)

Next: End

IS SYSTEM FULLY PUMPED?

PCB - ELECTRONIC CONTROL

Next: End

MAINS FUSE

Z REDIRECT

Next: End

FUSE INVESTIGATION MAINS

SOLENOID COIL (PILOT)

Next: End

FUSE INVESTIGATION MAINS

SOLENOID COIL (MAIN)

Next: End

NO FAULT FUSE INVESTIGATION MAINS

NO FAULT FUSE INVESTIGATION

Next: End

SIT VALVE

NO FAULT FUSE INVESTIGATION

Next: End

HONEYWELL VALVE

NO FAULT FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION

SOLENOID COIL (PILOT)

Next: End

FUSE INVESTIGATION

SOLENOID COIL (MAIN)

Next: End

NO FAULT FUSE INVESTIGATION

NO FAULT FUSE INVESTIGATION

Next: End

HONEYWELL VALVE MAINS

NO FAULT FUSE INVESTIGATION

Next: End

SIT VALVE MAINS

NO FAULT FUSE INVESTIGATION

Next: End

NO MAINS POWER

Z REDIRECT

Next: End

FAN CYCLES ON AND OFF

CHARACTERISTIC TEST FROM FAN RUNS

Next: p135

BOILER / HEAT EXCHANGER NOISY DURING OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: p456

BURNER REMAINS ON AND CONTINUES TO HEAT PAST 82 DEGREES

CHARACTERISTIC TEST FROM BOILER TEMPERATURE REACHED

Next: !p152

OVERHEAT THERMOSTAT TRIPS BEFORE BOILER REACHES 82 DEGREES

CHARACTERISTIC TEST FROM BOILER TEMPERATURE REACHED

Next: !p154

BOILER OPERATES QUIETLY BUT RADS DO NOT HEAT OR ONLY GET WARM

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: p461

GAS RATE INCORRECT

Next: !p331

OVERHEAT HAS TRIPPED BUT WILL NOT RESET

CHARACTERISTIC TEST FROM OBSERVATION HAS OVERHEAT TRIPPED

Next: !p364

OVERHEAT HAS TRIPPED BUT RESETS - INVESTIGATE CAUSE OF OVERHEAT

CHARACTERISTIC TEST FROM OBSERVATION HAS OVERHEAT TRIPPED

Next: p366

BURNER REMAINS ON AND CONTINUES TO HEAT PAST 82 DEGREES

CHARACTERISTIC TEST FROM BOILER TEMPERATURE REACHED

Next: !p376

OVERHEAT THERMOSTAT TRIPS BEFORE BOILER REACHES 82 DEGREES

CHARACTERISTIC TEST FROM BOILER TEMPERATURE REACHED

Next: !p378

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM FAN RUNS

Next: p43

EXCESSIVE SYSTEM PRESSURE RISE (SEALED SYSTEM ONLY)

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p455

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p522

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p524

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p554

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p556

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p632

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p634

PILOT SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p640

MAIN SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p642

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p659

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p661

PILOT SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p667

MAIN SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p669

RESISTANCE AIR PRESSURE SWITCH WITH KIT

{GAINPCBACS}
DISCONNECT WIRES FROM APS MAKING A NOTE OF THEIR CONNECTIONS

Next: p193, !f194

SPARK ELECTRODE INSPECTION

DISCONNECT SPARK ELECTRODE LEAD FROM SPARK ELECTRODE

Next: !p197, f198

ELECTRODE LEAD RESISTANCE

Next: !p199, !f200

PUMP VOLTAGE (CH DEMAND)

{GAINPCBACS}
BOILER THERMOSTAT IN ITS '0' POSITION

Next: !p453, f338

VOLTAGE SWITCHED LIVE INTO BOILER

GAIN ACCESS TO MAINS

Next: !p339, !f651

FUSE FURTHER INVESTIGATION (INTERNAL)

THE INFORMATION PROV

Next: !p355, !f356

MAINS POWER SUPPLY

{GAINPCBACS}

Next: !p382, !f383

AIR PRESSURE SWITCH DAMPER

Next: p49, !f48

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p519, !f549

FUSE CHECK

REMOVE FUSE FROM THE PCB

Next: p357, f354

PRESSURE GAS INLET

ATTACH PRESSURE GAUG

Next: p551, !f593

ELECTRODE LEAD RESISTANCE

Next: p559, !f560

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p569, !f570

ELECTRODE LEAD RESISTANCE

Next: p573, !f574

ELECTRODE LEAD RESISTANCE

Next: p585, !f586

PRESSURE GAS INLET (OPERATION)

ATTACH PRESSURE GAUG

Next: !p595, !f596

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: p678, f618

FUSE FURTHER INVESTIGATION (MAINS)

THE INFORMATION PROV

Next: !p619, !f620

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: p625, !f626

RESISTANCE FAN

DISCONNECT LEADS TO FAN

Next: p654, !f655

PILOT OUT CONFIRMATION

ENSURE GAS TO APPLIANCE IS ISOLATED
WAIT FOR 60 SECONDS

Next: !p136, !f138

OBSERVATION SPARKING WITH KIT

REFIT WIRES TO APS I

Next: p345, f196

LIMPET TEST

Next: p474, !f249

LIMPET TEST

Next: p477, !f251

GAS RATE

Next: !p253, ?330, ?332

INSPECTION BURNER INJECTOR

Next: !p334, !f335

AIR PRESSURE SWITCH DAMPER

Next: p346, !f347

AIR PRESSURE SENSING TUBES

Next: p348, !f349

AIR PRESSURE SENSING PIPES

Next: p600, !f351

FLUE ASSEMBLY

Next: !p352, !f353

OBSERVATION HAS OVERHEAT TRIPPED

ENSURE BOILER IS COOL

Next: p57, ?363, ?365

LIMPET TEST

Next: p369, !f367

HIGH BURNER FLAME

ENSURE THAT THE BOIL

Next: p371, !f370

INSPECTION EXTERNAL BYPASS

Next: p374, !f373

BOILER TEMPERATURE REACHED

BOILER THERMOSTAT IN

Next: p380, ?375, ?377

PUMP OVERRUN

Next: !p384, f381

AIR PRESSURE SWITCH: NO AIR RESISTANCE

LOWER THE CONTROLS PANEL ASSEMBLY

Next: p47, f46

FAN VOLTAGE

{GAINPCBACS}
ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p55, f54

EXTERNAL BYPASS

Next: !p475, !f476

EXTERNAL BYPASS

Next: p252, !f486

AIR PRESSURE SENSING TUBES

Next: p51, !f50

AIR PRESSURE SENSING PIPES

Next: p597, !f52

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p520, ?521, ?523

PILOT SOLENOID VOLTAGE (WHITE ROGERS)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p543, f544

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: p525, !f526

PILOT SOLENOID VOLTAGE (SIT)

{GAINPCBACS}
ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p527, f528

PILOT INJECTOR

Next: !p533, !f534

PILOT SOLENOID VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p537, f538

PILOT INJECTOR

Next: !p541, !f542

PILOT INJECTOR

Next: !p547, !f548

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p552, ?553, ?555

MAIN GAS VALVE VOLTAGE (WHITE ROGERS)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p583, f584

MAIN GAS VALVE VOLTAGE (HONEYWELL)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p571, f572

MAIN GAS VALVE VOLTAGE (SIT)

{GAINPCBACS}
ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p557, f558

INSPECTION SPARK ELECTRODE

Next: p561, !f562

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p567, f568

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p579, f580

INSPECTION SPARK ELECTRODE

Next: p575, !f576

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p591, !f592

INSPECTION SPARK ELECTRODE

Next: p587, !f588

BOILER THERMOSTAT RESISTANCE (CALLING)

BOILER THERMOSTAT IN

Next: !p61, !f60

RESISTANCE FAN

DISCONNECT LEADS TO FAN

Next: p627, !f628

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p629, ?631, ?633

RESISTANCE GAS VALVE (WHITE ROGERS)

DISCONNECT LEADS FROM THE GAS VALVE

Next: p648, !f644

RESISTANCE GAS VALVE (HONEYWELL)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: p672, ?639, ?641

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: p675, !f636

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p652, !f650

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p656, ?658, ?660

RESISTANCE GAS VALVE (WHITE ROGERS)

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p670, !f671

RESISTANCE GAS VALVE (HONEYWELL)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p664, ?666, ?668

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p662, !f663

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p673, !f674

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p676, !f677

NO POWER FURTHER INVESTIGATION

THE INFORMATION PROV

Next: !p679, !f680

System Information

  • Total Tests: 247
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control