XSol Diagnostic System

FUSE INVESTIGATION TREE

HEADER FOR FUSE INVESTIGATION OUTSIDE MODEL - INTENTIONALLY BLANK

Next: &nff, f354

FUSE INVESTIGATION TREE (MAINS)

HEADER FOR MAINS FUSE INVESTIGATION OUTSIDE MODEL - INTENTIONALLY BLANK

Next: &nff, f374

DIAGNOSTIC TYPE SELECTION

Next: &9, !f402

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW

Next: &nff, !f404

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: &nff, !f406

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

OUTSIDE MODEL

Next: &nff, f408

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

OUTSIDE MODEL

Next: &nff, f412

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE

OUTSIDE MODEL

Next: &nff, f416

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE - WHITE ROGERS

OUTSIDE MODEL

Next: &nff, f427

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE - SIT

OUTSIDE MODEL

Next: &nff, f432

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE - HONEYWELL

OUTSIDE MODEL

Next: &nff, f436

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE - WHITE ROGERS

OUTSIDE MODEL

Next: &nff, f440

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE - SIT

OUTSIDE MODEL

Next: &nff, f445

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE - HONEYWELL

OUTSIDE MODEL

Next: &nff, f450

PUMP OVERRUN

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

HIGH BURNER

GAS VALVE

Next: End

FAN CYCLING

PCB - ELECTRONIC CONTROL

Next: End

PILOT IGNITES (WHITE ROGERS)

PILOT INJECTOR

Next: End

BURNER IGNITES (WHITE ROGERS)

LEAD - ELECTRODE

Next: End

BURNER IGNITES (WHITE ROGERS)

ELECTRODE - SPARK

Next: End

BURNER IGNITES

GAS ARRANGEMENT - WHITE ROGERS

Next: End

ELECTRODE SPARKING

PRESSURE SWITCH (AIR)

Next: End

ELECTRODE SPARKING

PCB - ELECTRONIC CONTROL

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 (FAN RUNS)

SWITCH- SLIDER

Next: End

ELECTRICAL SAFETY CHECK

ELECTRICAL CHECK

Next: End

IS SYSTEM FULLY PUMPED?

THERMOSTAT - OVERHEAT

Next: End

FAN DOES NOT RUN - GRAVITY

Next: End

FAN DOES NOT RUN - GRAVITY

RESTRICTOR - AIR PRESSURE SWITCH

Next: End

FAN DOES NOT RUN - GRAVITY

AIR PRESSURE SENSING TUBES

Next: End

FAN DOES NOT RUN - GRAVITY

AIR PRESSURE SENSING PIPES

Next: End

FAN DOES NOT RUN - GRAVITY

THERMOSTAT - OVERHEAT

Next: End

FAN DOES NOT RUN - GRAVITY

BOILER CONTROL THERMOSTAT

Next: End

FAN DOES NOT RUN - GRAVITY - FULLY PUMPED SIDE DAMAGED

SWITCH- SLIDER

Next: End

FAN DOES NOT RUN - GRAVITY - GRAVITY SIDE DAMAGED

SWITCH- SLIDER

Next: End

SPARKING

CASE AND SEALS

Next: End

CH OPERATION NOISY

PUMP

Next: End

CH OPERATION RADS COOL

PUMP

Next: End

PILOT IGNITES

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES

SOLENOID COIL

Next: End

PILOT IGNITES (WHITE ROGERS)

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (HONEYWELL)

PILOT INJECTOR

Next: End

PILOT IGNITES (SIT)

PILOT INJECTOR

Next: End

PILOT IGNITES (SIT)

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES

LEAD - ELECTRODE

Next: End

BURNER IGNITES

ELECTRODE - SPARK

Next: End

BURNER IGNITES

SOLENOID COIL

Next: End

BURNER IGNITES

HARNESS - PCB TO GAS VALVE

Next: End

BURNER IGNITES (WHITE ROGERS)

HARNESS - PCB TO GAS VALVE

Next: End

IS SYSTEM FULLY PUMPED?

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

GAS VALVE (SIT)

Next: End

BURNER IGNITES (SIT) - VOLTAGE PRESENT

HARNESS - PCB TO GAS VALVE

Next: End

PILOT IGNITES (SIT) - VOLTAGE PRESENT

HARNESS - PCB TO GAS VALVE

Next: End

IS SYSTEM FULLY PUMPED?

SWITCH- SLIDER

Next: End

CENTRAL HEATING OPERATION - LPG

INJECTOR - BURNER

Next: End

BLOWN

FUSE (FUSED SPUR)

Next: End

BLOWN 2

FUSE (FUSED SPUR)

Next: End

IS SYSTEM FULLY PUMPED?

FUSE

Next: End

FAN DOES NOT RUN - GRAVITY

FUSE

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

FUSE INVESTIGATION MAINS

PUMP

Next: End

FUSE INVESTIGATION MAINS

FAN ASSEMBLY

Next: End

FUSE INVESTIGATION MAINS

OPERATOR COILS (SIT SOLENOID)

Next: End

MAINS FUSE INV - SIT VALVE

Next: End

IS DHW A GRAVITY SYSTEM?

SWITCH- SLIDER

Next: End

MAINS FUSE INV - HONEYWELL

Next: End

FUSE INVESTIGATIONPILOT SOLENOID MAINS

GAS ARRANGEMENT - WHITE ROGERS

Next: End

OBSERVATION FAN RUNS - TRIPPING / BLOWING FUSES

Next: End

FOR TYPE DIAG PROCEDURE

NULL TESTS

Next: End

BLANK FOR QUICK ACCESS AND INFORMATION

Z REDIRECTION

Next: End

BLANK FOR DIAGNOSTICS LITE

Z REDIRECTION

Next: End

RESISTANCE INCORRECT (QADAI)

FAN ASSEMBLY

Next: End

VOLTAGE INCORRECT WHITE ROGERS (QADAI)

PCB - ELECTRONIC CONTROL

Next: End

VOLTAGE INCORRECT SIT (QADAI)

PCB - ELECTRONIC CONTROL

Next: End

VOLTAGE INCORRECT HONEYWELL (QADAI)

PCB - ELECTRONIC CONTROL

Next: End

RESISTANCE INCORRECT (QADAI

GAS ARRANGEMENT - WHITE ROGERS

Next: End

RESISTANCE INCORRECT (QADAI)

GAS VALVE (HONEYWELL)

Next: End

RESISTANCE INCORRECT (QADAI)

GAS VALVE (SIT)

Next: End

PUMP VOLATGE (QADAI)

SWITCH- SLIDER

Next: End

VOLTAGE INCORRECT (QADAI)

PCB - ELECTRONIC CONTROL

Next: End

IS SYSTEM FULLY PUMPED?

RESTRICTOR - AIR PRESSURE SWITCH

Next: End

IS SYSTEM FULLY PUMPED?

AIR PRESSURE SENSING TUBES

Next: End

IS SYSTEM FULLY PUMPED?

AIR PRESSURE SENSING PIPES

Next: End

IS SYSTEM FULLY PUMPED?

BOILER CONTROL THERMOSTAT

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

PILOT SOLENOID

GAS ARRANGEMENT - WHITE ROGERS

Next: End

BURNER IGNITES (WHITE ROGERS)

INJECTOR - BURNER

Next: End

ELECTRODE SPARKING

ELECTRODE - SPARK

Next: End

ELECTRODE SPARKING

LEAD - ELECTRODE

Next: End

ELECTRODE SPARKING

FAN ASSEMBLY

Next: End

FAN DOES NOT RUN - GRAVITY

PRESSURE SWITCH (AIR)

Next: End

FAN DOES NOT RUN - GRAVITY

FAN ASSEMBLY

Next: End

FAN DOES NOT RUN - GRAVITY

PCB - ELECTRONIC CONTROL

Next: End

FAN DOES NOT RUN - GRAVITY

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

CENTRAL HEATING OPERATION

HEAT EXCHANGER

Next: End

CENTRAL HEATING OPERATION

Next: End

PILOT IGNITES (WHITE ROGERS)

PCB - ELECTRONIC CONTROL

Next: End

PILOT IGNITES

PCB - ELECTRONIC CONTROL

Next: End

PILOT IGNITES

GAS VALVE (HONEYWELL)

Next: End

PILOT IGNITES

GAS VALVE (SIT)

Next: End

PILOT IGNITES (SIT)

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES

INJECTOR - BURNER

Next: End

BURNER IGNITES

GAS VALVE (HONEYWELL)

Next: End

BURNER IGNITES

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES (WHITE ROGERS)

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES (SIT)

PCB - ELECTRONIC CONTROL

Next: End

BURNER IGNITES (SIT)

INJECTOR - BURNER

Next: End

IS SYSTEM FULLY PUMPED?

THERMOSTAT - RANCO (PUMP OVERRUN)

Next: End

CH COOL

INJECTOR - BURNER

Next: End

CENTRAL HEATING OPERATION - LPG

Next: End

IS DHW A GRAVITY SYSTEM?

Next: End

BLANK FOR MAINS FUSE INVESTIGATION

Z REDIRECTION

Next: End

IS SYSTEM FULLY PUMPED?

PUMP

Next: End

IS SYSTEM FULLY PUMPED?

Next: End

BLANK FOR MAINS FUSE INVESTIGATION 2

Z REDIRECTION

Next: End

BLANK FOR PCB FUSE INVESTIGATION

Z REDIRECTION

Next: End

BLANK FOR PCB FUSE INVESTIGATION 2

Z REDIRECTION

Next: End

SIT VALVE

NO FAULT FUSE INVESTIGATION

Next: End

HONEYWELL VALVE

NO FAULT FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION

SOLENOID COIL

Next: End

FUSE INVESTIGATION

SOLENOID COIL

Next: End

NO FAULT FUSE INVESTIGATION

NO FAULT FUSE INVESTIGATION

Next: End

IS DHW A GRAVITY SYSTEM?

Next: End

SIT VALVE MAINS

NO FAULT FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION MAINS

SOLENOID COIL

Next: End

FUSE INVESTIGATION MAINS

SOLENOID COIL

Next: End

HONEYWELL VALVE MAINS

NO FAULT FUSE INVESTIGATION

Next: End

NO FAULT FUSE INVESTIGATION MAINS

NO FAULT FUSE INVESTIGATION

Next: End

IS DHW A GRAVITY SYSTEM?

PUMP

Next: End

FAN SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SATISFACTORY 1

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY WHITE ROGERS

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY SIT

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY HONEYWELL

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY WHITE ROGERS

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY SIT

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY HONEYWELL

RESULT AS EXPECTED

Next: End

IS SYSTEM FULLY PUMPED?

PRESSURE SWITCH (AIR)

Next: End

IS SYSTEM FULLY PUMPED?

FAN ASSEMBLY

Next: End

IS SYSTEM FULLY PUMPED?

PCB - ELECTRONIC CONTROL

Next: End

FAN CYCLES ON AND OFF

CHARACTERISTIC TEST FROM FAN RUNS

Next: p135

HEAT EXCHANGER NOISY WITH WATER CIRCULATING

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: p247

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: p250

PUMP DOES NOT RUN - SYSTEM FULLY PUMPED

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p24

PUMP DOES NOT RUN - GRAVITY SYSTEM

CHARACTERISTIC TEST FROM PUMP RUNS

Next: p26

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p271

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p270

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p291

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p290

GAS RATE INCORRECT

Next: !p331

UNABLE TO CARRY OUT GAS RATE (E G LPG INSTALLATION)

Next: p333

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p360

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p362

PILOT SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p368

MAIN SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p370

HONEYWELL VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p382

SIT VALVE FITTED

CHARACTERISTIC TEST FROM OBSERVATION GAS VALVE TYPE

Next: p384

PILOT SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p392

MAIN SOLENOID RESISTANCES WRONG

CHARACTERISTIC TEST FROM RESISTANCE GAS VALVE (HONEYWELL)

Next: !p394

FAN DOES NOT RUN - SYSTEM FULLY PUMPED

CHARACTERISTIC TEST FROM FAN RUNS

Next: p43

FAN DOES NOT RUN - GRAVITY SYSTEM

CHARACTERISTIC TEST FROM FAN RUNS

Next: p211

20/10/2022 07:38:23 2208_1_50_1 21/11/2022 09:14:47

31/10/2022 14:05:00

Next: End

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p163, ?267, ?269

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p180, ?287, ?289

ELECTRODE LEAD RESISTANCE

Next: p183, !f184

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT WIRES FROM APS MAKING A NOTE OF THEIR CONNECTIONS

Next: p193, !f194

SPARK ELECTRODE INSPECTION

Next: !p197, f198

ELECTRODE LEAD RESISTANCE

Next: !p199, !f200

HW EXTERNAL CONTROL OUTPUT VOLTAGE

BOILER THERMOSTAT SET TO ITS '0' POSITION
HW DEMAND

Next: p214, !f215

AIR PRESSURE SWITCH DAMPER

Next: p218, !f219

FUSE CHECK

REMOVE FUSE FROM THE PCB

Next: p226, f350

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p256, !f257

MAINS POWER SUPPLY

BOILER THERMOSTAT SET TO ITS '0' POSITION
ALL EXTERNAL CONTROLS CALLING FOR HEAT

Next: p30, f341

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p276, !f277

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p285, !f286

ELECTRODE LEAD RESISTANCE

Next: p294, !f295

MAIN SOLENOID RESISTANCE

Next: !p302, !f303

ELECTRODE LEAD RESISTANCE

Next: p311, !f312

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p337, f338

FUSE FURTHER INVESTIGATION (MAINS)

THE INFORMATION PROV

Next: !p339, !f340

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p342, f344

FUSE FURTHER INVESTIGATION (MAINS)

THE INFORMATION PROV

Next: !p345, !f346

FUSE FURTHER INVESTIGATION (PCB)

THE INFORMATION PROV

Next: !p348, !f349

MAINS POWER SUPPLY

BOILER THERMOSTAT SET TO ITS '0' POSITION
ALL EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p38, f336

FUSE FURTHER INVESTIGATION (PCB)

THE INFORMATION PROV

Next: !p351, !f352

RESISTANCE FAN

REMOVE THE 2 RED WIRES FROM THE FAN CONNECTOR

Next: p355, !f356

RESISTANCE PUMP

REMOVE PUMP COVER / PLUG

Next: p375, !f376

RESISTANCE FAN

REMOVE THE 2 RED WIRES FROM THE FAN CONNECTOR

Next: !p409, !f410

PUMP VOLTAGE (CH DEMAND)

BOILER THERMOSTAT IN ITS '0' POSITION

Next: !p413, !f459

FAN VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p417, !f460

MAIN GAS VALVE VOLTAGE (WHITE ROGERS)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p428, !f430

MAIN GAS VALVE VOLTAGE (SIT)

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

Next: !p433, !f434

MAIN GAS VALVE VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p437, !f438

RESISTANCE GAS VALVE (WHITE ROGERS)

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p441, !f443

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p446, !f458

RESISTANCE GAS VALVE (HONEYWELL)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p451, !f457

AIR PRESSURE SWITCH DAMPER

Next: p49, !f48

FUSE CHECK

REMOVE FUSE FROM THE PCB

Next: p57, f347

PILOT OUT CONFIRMATION

ENSURE GAS TO APPLIANCE IS ISOLATED
WAIT FOR 60 SECONDS

Next: !p136, !f138

PILOT SOLENOID VOLTAGE (WHITE ROGERS)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p165, f255

PILOT INJECTOR

Next: !p166, !f167

MAIN GAS VALVE VOLTAGE (WHITE ROGERS)

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p181, f182

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p187, !f188

INSPECTION SPARK ELECTRODE

Next: p262, !f186

OBSERVATION SPARKING WITH KIT

REFIT WIRES TO APS I

Next: p236, f196

AIR PRESSURE SWITCH DAMPER

Next: p201, !f202

AIR PRESSURE SENSING TUBES

Next: p203, !f204

AIR PRESSURE SENSING PIPES

Next: p205, !f206

FLUE ASSEMBLY

Next: !p207, !f208

OBSERVATION DOES FAN RUN IN FULLY PUMPED

MOVE SELECTOR SWITCH FROM GRAVITY POSITION TO FULLY PUMPED POSITION

Next: p212, f213

RESISTANCE SELECTOR SWITCH (GRAVITY)

DISCONNECT BLUE WIRE

Next: !p234, !f235

AIR PRESSURE SWITCH: NO AIR RESISTANCE

LOWER THE CONTROLS PANEL ASSEMBLY

Next: p216, f217

FAN VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p224, f225

AIR PRESSURE SENSING TUBES

Next: p220, !f221

AIR PRESSURE SENSING PIPES

Next: !p222, !f223

OVERHEAT THERMOSTAT RESISTANCE

Next: p228, !f229

BOILER THERMOSTAT RESISTANCE (CALLING)

BOILER THERMOSTAT IN

Next: p230, !f231

RESISTANCE SELECTOR SWITCH (FULLY PUMPED)

DISCONNECT BROWN WIRES FROM SELECTOR SWITCH

Next: !p232, !f233

INSPECTION CASE INTEGRITY

REMOVE COMBUSTION DOOR FROM BOILER

Next: p195, !f246

PUMP THERMOSTAT OUTPUT VOLTAGE (CH DEMAND)

GAIN ACCESS TO MAINS

Next: p28, f27

LIMPET TEST

Next: !p248, !f249

LIMPET TEST

Next: p252, !f251

GAS RATE

Next: !p253, ?330, ?332

ROOM THERMOSTAT/EXTERNAL CONTROL VOLTAGE (OUTPUT)

GAIN ACCESS TO MAINS

Next: p36, f35

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p307, !f306

PILOT SOLENOID VOLTAGE (SIT)

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

Next: p324, f278

PILOT SOLENOID RESISTANCE

Next: p272, !f273

PILOT SOLENOID VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p279, f275

PILOT INJECTOR

Next: !p280, !f281

PUMP VOLTAGE (CH DEMAND)

BOILER THERMOSTAT IN ITS '0' POSITION

Next: !p34, !f33

PILOT INJECTOR

Next: !p283, !f284

MAIN GAS VALVE VOLTAGE (SIT)

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

Next: p319, f310

MAIN GAS VALVE VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: p292, f293

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p300, f301

INSPECTION SPARK ELECTRODE

Next: p296, !f297

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p304, !f305

ROOM THERMOSTAT/EXTERNAL CONTROL VOLTAGE (OUTPUT)

GAIN ACCESS TO MAINS

Next: !p32, !f31

GAS VALVE OUTLET PRESSURE

ENSURE THAT THE BOIL

Next: !p317, !f318

INSPECTION SPARK ELECTRODE

Next: p313, !f314

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: !p315, !f316

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: p308, !f323

INSPECTION GAS VALVE HARNESS AND CONNECTOR

Next: p282, !f328

INSPECTION BURNER INJECTOR

Next: !p334, !f335

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p357, ?359, ?361

RESISTANCE GAS VALVE (WHITE ROGERS)

DISCONNECT LEADS FROM THE GAS VALVE

Next: !p371, !f372

PUMP VOLTAGE (CH DEMAND)

BOILER THERMOSTAT IN ITS '0' POSITION

Next: !p40, !f39

RESISTANCE GAS VALVE (HONEYWELL)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p365, ?367, ?369

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: !p363, !f364

RESISTANCE FAN

REMOVE THE 2 RED WIRES FROM THE FAN CONNECTOR

Next: p377, !f378

OBSERVATION GAS VALVE TYPE

THERE ARE THREE DIFF

Next: p379, ?381, ?383

RESISTANCE GAS VALVE (WHITE ROGERS)

DISCONNECT LEADS FROM THE GAS VALVE

Next: p397, !f398

RESISTANCE GAS VALVE (HONEYWELL)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: p389, ?391, ?393

RESISTANCE GAS VALVE (SIT)

DISCONNECT LEADS FROM BOTH GAS VALVE SOLENOIDS

Next: p385, !f386

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p387, !f388

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p395, !f396

OBSERVATION REMOVE POWER SUPPLY TO APPLIANCE

REMOVE THE LIVE, SWI

Next: !p399, !f400

AIR PRESSURE SWITCH: NO AIR RESISTANCE

LOWER THE CONTROLS PANEL ASSEMBLY

Next: p47, f46

FAN VOLTAGE

ENSURE THAT THE BOILER THERMOSTAT IS SET TO MAX

Next: !p55, f54

AIR PRESSURE SENSING TUBES

Next: p51, !f50

AIR PRESSURE SENSING PIPES

Next: !p53, !f52

OVERHEAT THERMOSTAT RESISTANCE

Next: p59, !f210

BOILER THERMOSTAT RESISTANCE (CALLING)

BOILER THERMOSTAT IN

Next: p61, !f60

RESISTANCE SELECTOR SWITCH (FULLY PUMPED)

DISCONNECT BROWN WIRES FROM SELECTOR SWITCH

Next: !p63, !f209

System Information

Total Tests: 288

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control