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:

ALPHA THERM CD18R

WARNING - IMPORTA

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

ALPHA THERM CD18R

GC NO. 41 532 03

Next: &5, !f918

DOES BOILER REACT TO DHW OR CH DEMAND

ENSURE THAT THERE IS

Next: &121, ?5, ?7, ?9

BOILER OPERATION

Next: &16, ?308, ?310

DHW OPERATION

ENSURE CONTROLS ARE CALLING FOR HEAT

Next: &76, ?510, ?512, ?523, ?568

CH OPERATION

Next: &15, ?488, ?490, ?492, ?494, ?514, ?521

CH AND DHW OPERATION

ENSURE ALL CONTROLS ARE CALLING

Next: &503, ?516, ?518, ?525, ?570

OVER HEAT STAT

Next: &nff, f142

FUSE F2

REMOVE FUSE F2 FROM THE HOLDER LOCATED ON THE PCB JUST BELOW THE MAIN TERMINAL STRIP

Next: &nff, f446

FUSE F1

REMOVE FUSE F1 FROM THE HOLDER TO THE LEFT OF THE TERMINAL MARKED L BY THE MAIN TERMINAL STRIP

Next: &nff, f260

FLUE STAT

Next: &nff, f143

BURNER IGNITION

ENSURE ALL CONTROLS ARE CALLING

Next: &14, ?122, ?124, ?126, ?128

FIRE SEQUENCE COMPLETE

Next: &nff, f702

SETTING MULTIMETER TO DIODE CHECK

THE IMAGES BELOW SHO

Next: &nff, !f1001

BLANK FOR MULTIMETER GUIDE

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAULT 5 GASVALVE FUNCTION

CONTROL PCB

Next: End

FAULT 1

GAS SUPPLY

Next: End

FAULTY GAS VALVE LEAD

CABLE

Next: End

FAULT 4 FAN FUNCTION 2

CONTROL PCB

Next: End

FAULT 1

THERMOSTAT - OVERHEAT

Next: End

FAULT 1

THERMOSTAT 100 DEG C - FLUE

Next: End

FAULT 1

FUSE F2 0.315 AMP

Next: End

FAULT 1

FUSE FI 2 AMP

Next: End

FAULT 2

KIT - CONDENSATE TRAP ASSEMBLY

Next: End

FAULT 2

FLUE

Next: End

FAULT 1

Next: End

FAULT 2

THERMOSTAT - OVERHEAT

Next: End

FAULT 1

Next: End

FAULT 1 CALIBRATION

SENSOR - TEMPERATURE (FLOW AND RETURN)

Next: End

FAULT 2

GAS SUPPLY

Next: End

FAULT 4 FAN FUNCTION 5

CONTROL PCB

Next: End

FAULT 3

KIT - CONDENSATE TRAP ASSEMBLY

Next: End

CH DEMAND SWITCHING

INTEGRAL PROGRAMMER

Next: End

FAULT 1

Next: End

FAULT 1

POLARITY

Next: End

FAULT 2

EXTERNAL CONTROLS CH

Next: End

DHW SWITCHING

INTEGRAL PROGRAMMER

Next: End

FAULT 4

GAS SUPPLY

Next: End

FAULT 1

Next: End

FAULT 2

TRANSFORMER

Next: End

FAULT 3

PUMP

Next: End

FAULT 4

PUMP

Next: End

FAULT 3

TRANSFORMER

Next: End

FAULT 2

ELECTRICAL DAMAGE

Next: End

FAULT 6

FAN ASSEMBLY

Next: End

FAULT 2

GENERATOR - IGNITION

Next: End

FAULT 3

GENERATOR - IGNITION

Next: End

FAULT 4

VALVE - GAS - DUNGS

Next: End

FAULT 7

FAN ASSEMBLY

Next: End

FAULT 5

PUMP

Next: End

FAULT 5

TRANSFORMER

Next: End

FAULT 6

ELECTRICAL DAMAGE

Next: End

FAULT 2

Next: End

FAULT 4

TRANSFORMER

Next: End

FAULT 6

PUMP

Next: End

FAULT 4

GENERATOR - IGNITION

Next: End

FAULT 5

GENERATOR - IGNITION

Next: End

FAULT 1

GAS SUPPLY

Next: End

FAULT 1

LOOM - FAN

Next: End

FAULT 1

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 1

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 4 FAN FUNCTION 6

CONTROL PCB

Next: End

FAULT 2 PUMP FUNCTION

CONTROL PCB

Next: End

FAULT 2

Next: End

FAULT 7

PUMP

Next: End

FAULT 2

GAS VALVE ADJUSTMENT

Next: End

AIR PROBLEM

Next: End

FAULT 5

GAS SUPPLY

Next: End

FAULT 2

LOOM - SENSORS FLOW AND RETURN

Next: End

FAULT 4

THERMOSTAT - OVERHEAT

Next: End

FAULT 4

THERMOSTAT 100 DEG C - FLUE

Next: End

FAULT 4

LOOM - FAN

Next: End

FAULT 4 FAN FUNCTION 7

CONTROL PCB

Next: End

FAULT 3

Next: End

FAULT 1

EXTERNAL FROST THERMOSTAT

Next: End

FAULT 2

Next: End

FAULT 4

Next: End

FAULT 3

EXTERNAL FROST THERMOSTAT

Next: End

FAULT 1

DHW BALANCING VALVE

Next: End

FAULT 6

GAS SUPPLY

Next: End

FAULT 4

GAS VALVE ADJUSTMENT

Next: End

FAULT 5

Next: End

FAULT 1

Next: End

FAULT 2

EXTERNAL FROST THERMOSTAT

Next: End

FAULT 1

FAN ASSEMBLY

Next: End

TO PUMP CHECK

DUMMY FOR REDIRECTS

Next: o785-f553, *

FAULT 1

ELECTRODE - IGNITION

Next: End

FAULT 1

TUBES - FAN

Next: End

FAULT 2

TUBES - FAN

Next: End

FAULT 3

LOOM - FAN

Next: End

FAULT 4 FAN FUNCTION 4

CONTROL PCB

Next: End

FAULT 5

PIPE - AIR INTAKE

Next: End

FAULT 6

LOOM - FAN

Next: End

FAULT 4 FAN FUNCTION 9

CONTROL PCB

Next: End

FAULT 5

LOOM - FAN

Next: End

FAULT 4 FAN FUNCTION 8

CONTROL PCB

Next: End

FAULT 1

INJECTOR

Next: End

FAULT 2

PIPE - AIR INTAKE

Next: End

FAULT 1

MAINS INPUT

Next: End

FAULT 1

KIT - CONDENSATE TRAP ASSEMBLY

Next: End

FAULT 4

FLUE

Next: End

FAULT 3

BURNER

Next: End

FAULT

ELECTRICAL SAFETY CHECKS

Next: End

FAULT 7 IGNITION FUNCTION

CONTROL PCB

Next: End

FAULT 1

ELECTRODE - IGNITION - LEAD

Next: End

FAULT 1

ELECTRODE - IGNITION - GAP

Next: End

NO IGNITION GURGLING SOUND

PIPE - AIR INTAKE

Next: End

INSUFFICIENT NOT ESTABLISHING

GAS SUPPLY

Next: End

RESTRICTED / BLOCKED

FLUE

Next: End

RETRICTED / BLOCKED

BURNER

Next: End

FAULT 6

VALVE - GAS - DUNGS

Next: End

FAULT 7

VALVE - GAS - DUNGS

Next: End

FAULT 5

VALVE - GAS - DUNGS

Next: End

FAULT 1

BURNER

Next: End

RESTRICTED/BLOCKED

FLUE

Next: End

RESTRICTED

HEAT EXCHANGER - PRIMARY

Next: End

BLOCKED

HEAT EXCHANGER - PRIMARY

Next: End

FAULT 1

VALVE - GAS - DUNGS

Next: End

FAULT 2

FAN ASSEMBLY

Next: End

OH STAT

FURTHER INVESTIGATION

Next: o764-f142, *

FUSE F2

FURTHER INVESTIGATION

Next: o761-f446, *

FUSE F1

FURTHER INVESTIGATION

Next: o762-f260, *

FLUE LIMIT STAT

FURTHER INVESTIGATION

Next: o763-f143, *

FAULT 2

THERMOSTAT 100 DEG C - FLUE

Next: End

FAULT 2

PUMP

Next: End

FAULT 1

Next: End

FAULT 1

HEAT EXCHANGER - PRIMARY

Next: End

FAULT 3

FAN ASSEMBLY

Next: End

FAULT 1

GAS VALVE ADJUSTMENT

Next: End

FAULT 1

LOOM - OVERHEAT AND FLUE THERMOSTATS

Next: End

FAULT 1

FUSE FI 2 AMP FATIGUE

Next: End

FAULT 1 BLOCKAGE

HEAT EXCHANGER - PRIMARY

Next: End

FAULT 1

ELECTRODE - FLAME SENSING

Next: End

FAULT 1

ELECTRODE - FLAME SENSING - GAP

Next: End

FAULT 8 F REC FAULT

CONTROL PCB

Next: End

FAULT 1

Next: End

FAULT 1

Next: End

FAULT 1

ELECTRICAL DAMAGE

Next: End

FAULT 2

Next: End

FAULT 3

ELECTRICAL DAMAGE

Next: End

FAULT 4

ELECTRICAL DAMAGE

Next: End

FAULT 2

FUSE FI 2 AMP FATIGUE

Next: End

FAULT 2

Next: End

FAULT 2

Next: End

FAULT 1

EXTERNAL CONTROLS CH

Next: End

FAULT 8

ELECTRICAL DAMAGE

Next: End

FAULT 7

ELECTRICAL DAMAGE

Next: End

FAULT 2

Next: End

FAULT 3

Next: End

FAULT 5

ELECTRICAL DAMAGE

Next: End

FAULT 5

KIT - CONDENSATE TRAP ASSEMBLY

Next: End

FAULT 1

EXPANSION VESSEL

Next: End

FAULT 1

PUMP

Next: End

FAULT 3

Next: End

FAULT 8

PUMP

Next: End

FAULT 4 CIRCULATION

Next: End

FAULT 2

HEAT EXCHANGER - PRIMARY

Next: End

FAULT AIR PROBLEM

Next: End

FAULT 2

EXPANSION VESSEL

Next: End

FAULT 3

EXPANSION VESSEL

Next: End

FAULT 3

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 3

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 9

PUMP

Next: End

FAULT 4 CIRCULATION 2

Next: End

FAULT 4

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 4

SENSOR - THERMOSTAT (RETURN)

Next: End

OH STAT3

FURTHER INVESTIGATION

Next: o768-f142, *

FAULT 3

LOOM - OVERHEAT AND FLUE THERMOSTATS

Next: End

FLUE LIMIT STAT 3

FURTHER INVESTIGATION

Next: o767-f143, *

FAULT 8

FAN ASSEMBLY

Next: End

FAULT 9 FROST STAT FUNCTION

CONTROL PCB

Next: End

FAULT 5

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 5

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 1

Next: End

FAULT 4 CIRCULATION 3

Next: End

FAULT 9 FROST STAT FUNCTION 7

CONTROL PCB

Next: End

FAULT 10

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 9

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 2

Next: End

FAULT 11

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 10

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 10 OVERRUN FUNCTION

CONTROL PCB

Next: End

FAULT 2

HEAT EXCHANGER - PRIMARY

Next: End

FAULT 9 FROST STAT FUNCTION 4

CONTROL PCB

Next: End

FAULT 9 FROST STAT FUNCTION 5

CONTROL PCB

Next: End

FAULT 6

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 6

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 7

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 8

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 8

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 9

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 12

SENSOR - TEMPERATURE (FLOW)

Next: End

FAULT 11

SENSOR - THERMOSTAT (RETURN)

Next: End

FAULT 9 FROST STAT FUNCTION 8

CONTROL PCB

Next: End

FAULT 9 FROST STAT FUNCTION 6

CONTROL PCB

Next: End

FAULT 1

TRANSFORMER

Next: End

FAULT 1 FAN FUNCTION

CONTROL PCB

Next: End

FAULT 3 TX FUNCTION

CONTROL PCB

Next: End

FAULT 4

PIPE - AIR INTAKE

Next: End

FAULT 1

FLUE

Next: End

FAULT 3

FLUE

Next: End

FAULT 1

PIPE - AIR INTAKE

Next: End

FAULT 5

FAN ASSEMBLY

Next: End

FAULT 1

Next: End

FAULT 1

HEAT EXCHANGER - PRIMARY

Next: End

FAULT 9

FAN ASSEMBLY

Next: End

FAULT 3

GAS VALVE ADJUSTMENT

Next: End

FAULT 10

FAN ASSEMBLY

Next: End

FAULT 1

VENTURI

Next: End

FAULT 1

LOOM - TERMINAL STRIP TO PCB

Next: End

FAULT 1

GENERATOR - IGNITION

Next: End

OUT OF RANGE OVERHEAT

SENSOR - TEMPERATURE (FLOW)

Next: End

OUT OF RANGE OVERHEAT

SENSOR - THERMOSTAT (RETURN)

Next: End

SORT CIRCUIT

CABLE

Next: End

WORN

CABLE

Next: End

BLOWN

CABLE

Next: End

RESTRICTED

VALVE - GAS - DUNGS

Next: End

ADJUSTMENT

VALVE - GAS - DUNGS

Next: End

FAN JUST RUNS CONTINUOUSLY AT HIGH SPEED

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p123

FAN RUNS SPARKING OCCURS NO IGNITION

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p125

FAN RUNS NO SPARKING AFTER 8 SECONDS

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p920

FAN RUNS NO IGNITION GURGLING SOUND HEARD FROM FAN

CHARACTERISTIC TEST FROM BURNER IGNITION

Next: p927

LIMPET INDICATES PUMP FAULT

Next: !p183

LIMPET INDICATES CICULATION FAULT

Next: p185

GAS RATE HIGH

Next: p200

BURNER STABLE BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p936

SPARKING STOPS BUT FLAME BAFFLES OR LIFTS OFF

CHARACTERISTIC TEST FROM BOILER OPERATION

Next: p365

ELECTRODE AND LEAD DAMAGED

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND GAP

Next: !p316

ELECTRODE GAP INCORRECT

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND GAP

Next: !p318

FUSE BLOWS IMMEDIATELY

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p404

FUSE BLOWS WITH EITHER CH OR DHW DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p406

FUSE BLOWS WITH CH DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: !p408

FUSE BLOWS WITH DHW DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: !p410

FUSE BLOWS WHEN FAN STARTS

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p412

FUSE BLOWS WHEN IGNITION STARTS

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p420

FUSE BLOWS IMMEDIATELY

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p449

FUSE BLOWS WITH EITHER CH OR DHW DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p451

FUSE BLOWS WITH CH DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: !p453

FUSE BLOWS WITH DHW DEMAND

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: !p455

FUSE BLOWS WHEN FAN STARTS

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p457

FUSE BLOWS WHEN IGNITION STARTS

CHARACTERISTIC TEST FROM FUSE FAILURE MODULE F1

Next: p459

BOILER HEATS, RADIATORS DO NOT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p551

INSUFFICIENT HEAT TO RADIATORS

CHARACTERISTIC TEST FROM CH OPERATION

Next: p491

BOILER NOISY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p493

SYSTEM STARTS TO HEAT THEN SHUTS DOWN PREMATURLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p614

AIR SURGES

CHARACTERISTIC TEST FROM DESCRIBE NOISE

Next: p498

GURGLING FROM COMBUSTION CHAMBER

CHARACTERISTIC TEST FROM DESCRIBE NOISE

Next: !p500

FAN ONLY REACTS TO DHW DEMAND

CHARACTERISTIC TEST FROM DOES BOILER REACT TO DHW OR CH DEMAND

Next: p6

WATER TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p511

WATER TOO COOL

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p513

SYSTEM PRESSURE RISES UNACCEPTABLY SEALED SYSTEMS ONLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p515

BOILER FIRES BUT SYSTEM DOES NOT REACH TEMPERATURE

CHARACTERISTIC TEST FROM CH AND DHW OPERATION

Next: p709

RADIATORS HEAT, WATER DOES NOT

CHARACTERISTIC TEST FROM CH AND DHW OPERATION

Next: p519

SYSTEM FIRES WITH NO APPARENT DEMAND

CHARACTERISTIC TEST FROM CH OPERATION

Next: p522

SYSTEM FIRES WITH NO APPARENT DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p662

SYSTEM FIRES WITH NO APPARENT DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p681

PUMP FAULTY

CHARACTERISTIC TEST FROM DESCRIBE NOISE

Next: !p561

SYSTEM CIRCULATION FAULT

Next: !p563

SYSTEM PRESSURE RISES UNACCEPTABLY SEALED SYSTEMS ONLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p569

SYSTEM PRESSURE RISES UNACCEPTABLY SEALED SYSTEMS ONLY

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p571

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p579

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p581

PUMP FAULT

Next: !p611

SYSTEM CIRCULATION FAULT

Next: !p613

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p620

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p622

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p647

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p649

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p745

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p744

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p741

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p740

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p743

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p742

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p689

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p691

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p749

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p750

FAN ONLY REACTS TO CH DEMAND

CHARACTERISTIC TEST FROM DOES BOILER REACT TO DHW OR CH DEMAND

Next: p8

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p705

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p707

ZERO PRESSURE SHOWN

CHARACTERISTIC TEST FROM FAN SPEED

Next: p830

FAN PRESSURE STAYS 1.5 AND DOES NOT DROP BACK

CHARACTERISTIC TEST FROM FAN PRESSURE (GV OPEN)

Next: p1006

POSITIVE PRESSURE SHOWN

CHARACTERISTIC TEST FROM FAN PRESSURE (GV OPEN)

Next: !p836

LOW PRESSURE SHOWN

CHARACTERISTIC TEST FROM FAN SPEED

Next: p870

HIGH PESSURE SHOWN

CHARACTERISTIC TEST FROM FAN SPEED

Next: !p860

ZERO PRESSURE SHOWN

CHARACTERISTIC TEST FROM FAN SPEED

Next: p862

FAN DOES NOT REACT TO EITHER DEMAND

CHARACTERISTIC TEST FROM DOES BOILER REACT TO DHW OR CH DEMAND

Next: p10

FLOW SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p953

RETURN SENSOR RESISTANCES INCORRECT

CHARACTERISTIC TEST FROM SENSOR RESISTANCE

Next: !p955

16/11/2017 14:59:38 1711_1_50_1 09/01/2018 08:35:33

16/11/2017 15:16:36

Next: End

FAULT 2

VALVE - GAS - DUNGS

Next: End

RESISTANCE OH STAT

REMOVE RED LEAD FROM OVERHEAT THERMOSTAT

Next: p134, f135

INFO ON OVERHEAT STAT PROBLEM

Next: !p136, !f137

INFO ON LIMIT STAT PROBLEM

Next: !p173, !f141

PUMP LIMPET TEST

Next: p180, ?182, ?184

CONDENSE SYPHON AND TRAP

Next: p177, !f176

INFO ON FUSE F2

Next: !p145, !f146

INFO ON FUSE F1

Next: !p148, !f149

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p211, !f212

FUSE FAILURE MODULE F1

CARRY OUT FULL SHORT

Next: !p261, ?403, ?405, ?407, ?409, ?411, ?419

FUSE FAILURE MODULE F2

CARRY OUT FULL SHORT

Next: !p447, ?448, ?450, ?452, ?454, ?456, ?458

PUMP VOLTAGE

FOR ACCESS BEHIND

Next: !p554, !f555

RESISTANCE OH STAT

REMOVE RED LEAD FROM OVERHEAT THERMOSTAT

Next: p625, f626

INFO ON OVERHEAT STAT PROBLEM

Next: !p627, !f628

INFO ON LIMIT STAT PROBLEM

Next: !p631, !f632

NO DEMAND FROM CONTROLS

FOR ACCESS BEHIND

Next: p641, !f642

NO DEMAND FROM CONTROLS

FOR ACCESS BEHIND

Next: p665, !f734

NO DEMAND FROM CONTROLS

FOR ACCESS BEHIND

Next: p684, !f685

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p708, ?704, ?706

VOLTAGE CHECK TRANSFORMER INPUT

FOR ACCESS BEHIND

Next: !p78, f79

FUSE F2

REMOVE FUSE F2 FROM THE HOLDER LOCATED ON THE PCB JUST BELOW THE MAIN TERMINAL STRIP

Next: !p80, f144

VOLTAGE CHECK BOARD INPUT

FOR ACCESS BEHIND

Next: !p88, f89

CHECK CONNECTIONS AND LOOM FOR DAMAGE

Next: p878, !f879

FAN SPEED

ATTACH PRESSURE GAUGE TO POSITIVE PRESSURE TEST POINT

Next: p887, f888

CHECK CONNECTIONS AND LOOM FOR DAMAGE

Next: p889, !f890

VOLTAGE CHECK (MAINS INPUT)

FOR ACCESS BEHIND

Next: p90, !f91

AIR INLET TUBE CHECK

REMOVE AIR INTAKE TUBE

Next: p907, !f908

RESISTANCE DIODE

{ISOLATEMAINSPOWER}<

Next: !p975, !f976

RESISTANCE DIODE

{ISOLATEMAINSPOWER}<

Next: !p977, !f978

RESISTANCE DIODE

{ISOLATEMAINSPOWER}<

Next: !p980, !f981

VOLTAGE CHECK SWITCH LIVE

FOR ACCESS BEHIND

Next: p35, f87

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p1009, !f1012

VOLTAGE GAS VALVE

Next: p1010, !f1011

DIODE CHECK GAS VALVE HARNESS

{ISOLATEMAINSPOWER}<

Next: !p1013, !f1014

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p130, !f131

RESISTANCE OH / FLUE STATS

FOR ACCESS BEHIND

Next: p793, f133

CONDENSE TRAP

Next: !p284, !f285

RESISTANCE FLUE STAT

REMOVE BLACK LEAD FROM OVERHEAT THERMOSTAT

Next: !p259, f139

VOLTAGE CHECK (MAINS INTEG CLOCK CH CHAN OUT)

FOR ACCESS BEHIND

Next: !p46, !f30

FLUE OPERATION PRESSURE CHECK

Next: !p178, !f179

CHECK CALIBRATION OF THERMISTORS

THERE ARE TWO THERMI

Next: p186, !f196

CHECK SYSTEM BYPASS

Next: !p187, !f188

CHECK TEMP OPERATION OF OH STAT

ENSURE CONTROLS ARE CALLING FOR HEAT

Next: p190, !f191

CHECK SYSTEM FOR AIR

Next: p192, !f193

GAS RATE

Next: !p194, ?199

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p203, !f204

FAN DIFFERENTIAL PRESSURE

ATTACH PRESSURE GAUGE TO +VE AND -VE PRESSURE CONNECTIONS AT THE TOP OF THE BOILER

Next: !p213, f210

ELECTRODE FLAME SENSE AND GAP

WHEN REMOVING THE ELECTRODE TAKE CARE NOT TO DISTORT OR BEND THE ELECTRODE TIP

Next: p314, ?315, ?317

VOLTAGE CHECK (MAINS INTEG CLOCK DHW CHAN OUT)

FOR ACCESS BEHIND

Next: !p47, !f34

POLARITY CHECK

FOR ACCESS BEHIND

Next: !p319, !f320

VOLTAGE CHECK TRANSFORMER OUTPUT

REMOVE CONNECTOR MARKED X11 FROM THE PCB

Next: p527, f77

FAN SPEED

ATTACH PRESSURE GAUGE TO POSITIVE PRESSURE TEST POINT

Next: p380, ?857, ?859, ?861

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p987, !f382

REMOVE EXTERNAL CONTROLS FROM SHORT CIRCUIT CHECK

FOR ACCESS BEHIND

Next: p413, !f414

PUMP RESISTANCE

FOR ACCESS BEHIND

Next: p429, !f422

FAN RESISTANCE

REMOVE FAN

Next: p436, !f437

TRANSFORMER RESISTANCE

DISCONNECT PLUG X11 (PINK LEADS SECONDARY WINDING) AND PLUG MARKED X4 (PRIMARY WINDING)

Next: p415, !f416

PUMP RESISTANCE

FOR ACCESS BEHIND

Next: !p417, !f418

SPARK GENERATOR RESISTANCE

FOR ACCESS BE

Next: p442, !f443

TRANSFORMER RESISTANCE

DISCONNECT PLUG X11 (PINK LEADS SECONDARY WINDING) AND PLUG MARKED X4 (PRIMARY WINDING)

Next: p430, !f431

REMOVE AND REWIRE FOR EXTERNAL CONTROLS

FOR ACCESS BEHIND

Next: !p435, !f433

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR MARKED X7 FROM THE PCB

Next: p438, f979

SPARK GENERATOR RESISTANCE

FOR ACCESS BE

Next: !p440, !f441

GAS VALVE RESISTANCE

DISCONNECT CONNECTOR MARKED X7 FROM THE PCB

Next: !p444, !f445

REMOVE EXTERNAL CONTROLS FROM SHORT CIRCUIT CHECK

FOR ACCESS BEHIND

Next: p476, !f477

PUMP RESISTANCE

FOR ACCESS BEHIND

Next: p470, !f471

FAN RESISTANCE

REMOVE FAN

Next: p464, !f465

SPARK GENERATOR RESISTANCE

FOR ACCESS BE

Next: p460, !f483

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR MARKED X7 FROM THE PCB

Next: !p462, f972

RESISTANCE GAS VALVE AND HARNESS

DISCONNECT CONNECTOR MARKED X7 FROM THE PCB

Next: p466, f971

SPARK GENERATOR RESISTANCE

FOR ACCESS BE

Next: !p468, !f486

TRANSFORMER RESISTANCE

DISCONNECT PLUG X11 (PINK LEADS SECONDARY WINDING) AND PLUG MARKED X4 (PRIMARY WINDING)

Next: p472, !f473

REMOVE AND REWIRE FOR EXTERNAL CONTROLS

FOR ACCESS BEHIND

Next: !p474, !f475

TRANSFORMER RESISTANCE

DISCONNECT PLUG X11 (PINK LEADS SECONDARY WINDING) AND PLUG MARKED X4 (PRIMARY WINDING)

Next: p478, !f479

PUMP RESISTANCE

FOR ACCESS BEHIND

Next: !p480, !f481

PUMP & SYSTEM CIRCULATION

Next: p576, ?610, ?612

DESCRIBE NOISE

Next: p504, ?497, ?499

OPEN VENT OR SEALED SYSTEM

Next: !p566, !f567

PUMP & SYSTEM CIRCULATION

Next: p946, ?560, ?562

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p507, !f508

GAS RATE

Next: !p564, !f565

EXTERNAL CONTROLS CHECK DHW

Next: !p656, !f736

EXTERNAL CONTROLS CHECK DHW

Next: !p661, !f659

BALANCING VALVE DHW

LOCATE BALANCING VALVE - IF FITTED IT WOULD BE EXPECTED TO BE FOUND ON THE RETURN FROM THE CYLINDER

Next: !p700, !f701

EXTERNAL FROST STAT FITTED

Next: p639, f640

CHECK FAN CONNECTIONS AND LOOM FOR DAMAGE

Next: p531, !f529

FAN VOLTAGE

DISCONNECT THE FAN L

Next: p532, !f537

RESISTANCE SENSOR FLOW THERMISTOR

DUE TO THE POSITION

Next: p533, !f534

RESISTANCE SENSOR RETURN THERMISTOR

DUE TO THE POSITION

Next: p776, !f536

PUMP RUNS

LOCATE PUMP - THE PUMP IS NOT AN INTEGRAL PART OF THE APPLIANCE

Next: p552, f553

EXTERNAL BYPASS ADJUSTMENT

Next: p556, !f557

PUMP LIMPET TEST

Next: !p558, !f559

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: p577, ?578, ?580

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p882, !f585

IS INTEGRAL CLOCK FITTED

Next: p17, !f334

SENSOR WIRING

NOTE:
THE THERMIS

Next: p615, !f616

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: p617, ?619, ?621

RESISTANCE OH / FLUE STATS

FOR ACCESS BEHIND

Next: p623, f624

CHECK CONNECTIONS AND LOOM FOR DAMAGE

Next: p633, !f634

RESISTANCE FLUE STAT

REMOVE BLACK LEAD FROM OVERHEAT THERMOSTAT

Next: !p629, f630

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p635, !f636

FROST STAT DEMAND

FOR ACCESS BEHIND

Next: p650, !f644

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p645, ?646, ?648

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p735, ?652, ?654

EXTERNAL FROST STAT FITTED

Next: p663, f664

FROST STAT DEMAND

FOR ACCESS BEHIND

Next: p673, !f738

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p752, ?669, ?671

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p737, ?677, ?679

EXTERNAL FROST STAT FITTED

Next: p682, f683

FROST STAT DEMAND

FOR ACCESS BEHIND

Next: p692, !f693

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p686, ?688, ?690

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: !p751, ?696, ?698

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p710, !f711

FAN DIFFERENTIAL PRESSURE

ATTACH PRESSURE GAUGE TO +VE AND -VE PRESSURE CONNECTIONS AT THE TOP OF THE BOILER

Next: p712, f877

GAS RATE

Next: !p732, !f733

PUMP RUNS

LOCATE PUMP - THE PUMP IS NOT AN INTEGRAL PART OF THE APPLIANCE

Next: p781, !f784

FAN RESISTANCE

REMOVE FAN

Next: !p782, !f783

FAN PRESSURE TEST GV OPEN

ATTACH PRESSURE GAUGE TO NEGATIVE FAN PRESSURE TEST POINT

Next: p794, ?801, ?804, ?835

ELECTRODE IGNITION LEAD

WHEN REMOVING THE ELECTRODE TAKE CARE NOT TO DISTORT OR BEND THE ELECTRODE TIP

Next: p956, !f797

IS INTEGRAL CLOCK FITTED

Next: p31, !f32

CHECK TUBES

Next: !p833, !f832

CHECK TUBES

Next: !p863, !f864

AIR INLET TUBE CHECK

REMOVE AIR INTAKE TUBE

Next: p871, !f876

CHECK CONNECTIONS AND LOOM FOR DAMAGE

Next: p872, !f873

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p874, !f875

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p916, !f881

GAS RATE

Next: !p883, f886

FAN PRESSURE TEST

ATTACH PRESSURE GAUGE TO NEGATIVE FAN PRESSURE TEST POINT

Next: p903, f906

FAN VOLTAGE

DISCONNECT THE FAN L

Next: !p891, !f892

FUSE F1

REMOVE FUSE F1 FROM THE HOLDER TO THE LEFT OF THE TERMINAL MARKED L BY THE MAIN TERMINAL STRIP

Next: !p92, f147

INJECTOR

Next: p913, !f905

CONDENSE SYPHON AND TRAP

Next: p909, !f910

FLUE CHECK

Next: !p917, !f912

BURNER INSPECTION

NOTE:
FOR INSPECTION REMOVE BURNER AND COMBUSTION CHAMBER FRONT AS AN ASSEMBLY.

Next: !p914, !f915

VOLTAGE SPARK GENERATOR INPUT

Next: p921, !f922

ELECTRODE IGNITION LEAD

WHEN REMOVING THE ELECTRODE TAKE CARE NOT TO DISTORT OR BEND THE ELECTRODE TIP

Next: p923, !f924

ELECTRODE IGNITION AND GAP

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p925, !f926

AIR INLET TUBE CHECK

REMOVE AIR INTAKE TUBE

Next: p129, !f931

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p309, !f945

RESISTANCE TEMPERATURE SENSORS

THERE ARE TWO THERMI

Next: p506, ?952, ?954

FLUE CHECK

Next: p963, !f965

BURNER INSPECTION

NOTE:
FOR INSPECTION REMOVE BURNER AND COMBUSTION CHAMBER FRONT AS AN ASSEMBLY.

Next: p992, !f966

BURNER INSPECTION

NOTE:
FOR INSPECTION REMOVE BURNER AND COMBUSTION CHAMBER FRONT AS AN ASSEMBLY.

Next: !p985, !f986

FLUE CHECK

Next: p995, !f991

INSPECTION HEAT EXCHANGER

Next: !p993, !f994

INSPECTION HEAT EXCHANGER

Next: p984, !f999

System Information

Total Tests: 438

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control