XSol Diagnostic System

HALSTEAD GLEN DIMPLEX WICKES - BEST / BOSS / LW

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CASE OFF

Next: &2, !f4

INFORMATION / GRAVITY LINK SET UP

Next: &50, !f5

OBSERVATION PUMP RUNS

LOCATE SYSTEM PUMP
BOILER THERMOSTAT SET TO MAX

Next: &336, f8

OBSERVATION FAN RUNS

ENSURE BOILER IS COOL

Next: &91, f66

TYPE OF DIAGNOSTIC PROCEDURE

Next: &429, !f51

OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: &142, ?92, ?94, ?96, ?98, ?175

OPERATION CH

Next: &372, ?143, ?145, ?147

OPERATION DHW

Next: &nff, ?375, ?377

IGNITION LOCKOUT RESET INFORMATION

A COMMON ISSUE WITH

Next: &nff, !f183

OVERHEAT INVESTIGATION

INTENTIONALLY BLANK - HEADER FOR OVERHEAT INVESTIGATION

Next: &nff, f301

FUSE INVESTIGATION (APPLIANCE)

INTENTIONALLY BLANK - HEADER FOR APPLIANCE FUSE INVESTIGATION

Next: &nff, f268

FUSE INVESTIGATION (MAINS)

INTENTIONALLY BLANK - HEADER FOR MAINS FUSE INVESTIGATION

Next: &nff, f253

OBSERVATION BOILER STANDBY

ENSURE NO DEMANDS

Next: &48, f337

PUMP OVERRUN OPERATION

ATTACH A TEMPERATURE CLAMP ON THE CH FLOW PIPE AS NEAR AS POSSIBLE TO THE APPLIANCE

Next: &nff, !f371

INFORMATION PUMP OVERRUN

Next: &171, !f373

HEADER FOR FAULTING IGNITION CONTROL BOX AND GAS VALVE (UNPROVEN)

HEADER FOR IGNITION CONTROL BOX FAULT FINDING - NOT USED

Next: &nff, f404

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f426

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f428

FAULT CODE LED'S

PLEASE SELECT FROM O

Next: &3, !f430

HEADER FOR QADAI THERMISTOR RESISTANCE

OK TO BE BLANK

Next: &nff, f432

HEADER FOR QADAI FAN RESISTANCE

OK TO BE BLANK

Next: &nff, f434

HEADER FOR QADAI FAN VOLTAGE

OK TO BE BLANK

Next: &nff, f436

HEADER FOR QADAI GAS VALVE RESISTANCE

OK TO BE BLANK

Next: &nff, f438

HEADER FOR QADAI GAS VALVE VOLTAGE

OK TO BE BLANK

Next: &nff, f440

HEADER FOR QADAI POTENTIOMETER CONTROL SIDE RESISTANCE

OK TO BE BLANK

Next: &nff, f446

INSUFFICIENT

GAS INLET PRESSURE

Next: End

INSUFFICIENT IGNITION PRESSURE

VALVE - GAS

Next: End

HIGH RESISTANCE OR WRONG GAP

ELECTRODE - FLAME DETECTION

Next: End

RESTRICTED / BLOCKED / DAMAGED

BURNER

Next: End

RESTRICTED OR BLOCKED

INJECTOR

Next: End

RESTRICTED / BLOCKED / DAMAGED 2

BURNER

Next: End

RESTRICTED OR BLOCKED

HEAT EXCHANGER (FLUEWAYS)

Next: End

INSUFFICIENT 2

GAS INLET PRESSURE

Next: End

WRONG SPARK GAP

ELECTRODE - IGNITION

Next: End

RESTRICTED / BLOCKED / DAMAGED 3

BURNER

Next: End

OPEN TOO MUCH

Next: End

NOT CIRCULATING PROPERLY

PUMP

Next: End

OUT OF CALIBRATION 2

THERMISTOR - HONEYWELL

Next: End

OUT OF CALIBRATION

POTENTIOMETER C/W LEADS

Next: End

RESTRICTED OR BLOCKED 3

INJECTOR

Next: End

INSUFFICIENT 3

GAS INLET PRESSURE

Next: End

EXCESSIVE BURNER PRESSURE

VALVE - GAS

Next: End

NOT CIRCULATING PROPERLY 2

PUMP

Next: End

OPEN CIRCUIT

THERMOSTAT - OVERHEAT

Next: End

BLANK FOR IGNITION LOCKOUT RESET INFORMATION

Z REDIRECTION

Next: End

NO APPARENT FAULT

FUSE FURTHER INVESTIGATION (MAINS)

Next: End

BLOWING MAINS FUSE

VALVE - GAS

Next: End

BLOWING MAINS FUSE

HARNESS

Next: End

BLOWING FUSE (MAINS)

FAN ASSEMBLY

Next: End

BLOWING FUSE (MAINS)

PUMP

Next: End

NO DEMAND

Next: End

BLOWING APPLIANCE FUSE

FAN ASSEMBLY

Next: End

BLOWING APPLIANCE FUSE

VALVE - GAS

Next: End

BLOWING APPLIANCE FUSE

HARNESS

Next: End

BLOWING APPLIANCE FUSE

PUMP

Next: End

PUMP SUPPLY SECTION (OVERHEAT)

HARNESS

Next: End

NOT CIRCULATING PROPERLY (OVERHEAT)

PUMP

Next: End

CLOSED TO MUCH

Next: End

OUT OF CALIBRATION (OVERHEAT)

THERMISTOR - HONEYWELL

Next: End

OUT OF CALIBRATION (OVERHEAT)

POTENTIOMETER C/W LEADS

Next: End

RUNNING WITH NO DEMAND (OVERHEAT)

CONTROL BOX - IGNITION - HONEYWELL

Next: End

RUNNING BEYOND TEMPERATURE

HARNESS

Next: End

OPEN CIRCUIT (OVERHEAT)

THERMOSTAT - OVERHEAT

Next: End

RUNNING WITH NO DEMAND

CONTROL BOX - IGNITION - HONEYWELL

Next: End

AQUASTAT TO CONTROL BOX SECTION (PINK WIRE) 2

HARNESS

Next: End

NOT MAKING AT RIGHT PRESSURE

PRESSURE SWITCH

Next: End

RESTRICTED OR BLOCKED 2

HEAT EXCHANGER (FLUEWAYS)

Next: End

BLOCKED / RESTRICTED 2

AIR PRESSURE SWITCH TUBES AND PIPES

Next: End

RESTRICTED OR BLOCKED

FLUE

Next: End

NO SPARK

CONTROL BOX - IGNITION - HONEYWELL

Next: End

BLANK FOR PUMP OVERRUN OPERATION 2

Z REDIRECTION

Next: End

PUMP OVERRUN NOT WORKING

PCB (AQUASTAT)

Next: End

BLANK FOR PUMP OVERRUN INFORMATION

Z REDIRECTION

Next: End

BLOWN

FUSE (MAINS)

Next: End

OUT OF CALIBRATION

THERMISTOR - HONEYWELL

Next: End

OUT OF CALIBRATION 3

THERMISTOR - HONEYWELL

Next: End

BLANK FOR CASE OFF

Z REDIRECTION

Next: End

RESTRICTED / BLOCKED / DAMAGED 4

BURNER

Next: End

PCB (IGNITION CONTROL BOX) AND GAS VALVE - PROVEN

CONTROL BOX - IGNITION AND GAS VALVE

Next: End

GAS VALVE BLOWN IGNITION CONTROL BOX

PCB (IGNITION CONTROL BOX) AND GAS VALVE RESISTANCE NOT OK

Next: End

BLOWN

FUSE (APPLIANCE)

Next: End

PUMP SUPPLY SECTION

HARNESS

Next: End

OPEN OR SHORT CIRCUIT

THERMISTOR - HONEYWELL

Next: End

SWITCH SIDE FAULTY

POTENTIOMETER C/W LEADS

Next: End

MAINS SUPPLY SECTION

HARNESS

Next: End

LITE DIAGNOSTIC

Z REDIRECTION

Next: End

QADAI TABLE

Z REDIRECTION

Next: End

FAULT LED'S

Z REDIRECTION

Next: End

QADAI

THERMISTOR - HONEYWELL

Next: End

QADAI FAN VOLTAGE

CONTROL BOX - IGNITION - HONEYWELL

Next: End

QADAI GAS VALVE RESISTANCE

VALVE - GAS

Next: End

QADAI GAS VALVE VOLTAGE

CONTROL BOX - IGNITION - HONEYWELL

Next: End

QADAI POTENTIOMETER RESISTANCE

POTENTIOMETER C/W LEADS

Next: End

QADAI FAN RESISTANCE

FAN ASSEMBLY

Next: End

BLANK FOR INFORATION / SETUP OF GRAVITY LINK

Z REDIRECTION

Next: End

BLANK FOR TYPE OF DIAGNOSTIC PROCEDURE

Z REDIRECTION

Next: End

CONTROL SIDE FAULTY

POTENTIOMETER C/W LEADS

Next: End

FAN SECTION

HARNESS

Next: End

AQUASTAT PCB TO CONTROL BOX SECTION

HARNESS

Next: End

BLOCKED / RESTRICTED

AIR PRESSURE SWITCH TUBES AND PIPES

Next: End

AQUASTAT TO CONTROL BOX SECTION (PINK WIRE)

HARNESS

Next: End

NOT RECTIFYING

CONTROL BOX - IGNITION - HONEYWELL

Next: End

BLOCKED OR SEALS BREACHED

FLUE

Next: End

RESTRICTED OR BLOCKED 2

INJECTOR

Next: End

NOT OPENING

VALVE - GAS

Next: End

NO POWER TO GAS VALVE

CONTROL BOX - IGNITION - HONEYWELL

Next: End

NOT CIRCULATING

Next: End

SHUTTING OFF TOO EARLY

PCB (AQUASTAT)

Next: End

INSUFFICIENT BURNER PRESSURE

VALVE - GAS

Next: End

KETTLING

HEAT EXCHANGER (WATERWAYS)

Next: End

OVERHEAT STAT SECTION

HARNESS

Next: End

SHOWING OVERHEAT WHEN SHOULDNT

PCB (AQUASTAT)

Next: End

BLOWING MAINS FUSE

Next: End

BLOWING FUSE (FAN SECTION) MAINS

HARNESS

Next: End

BLOWING FUSE (FAN SECTION) APPLIANCE

HARNESS

Next: End

NO APPARENT FAULT

FUSE FURTHER INVESTIGATION (APPLIANCE)

Next: End

NO POWER SUPPLY TO PUMP OVERHEAT

PCB (AQUASTAT)

Next: End

TRIPPING EARLY

THERMOSTAT - OVERHEAT

Next: End

NOT CONTROLLING HEAT

PCB (AQUASTAT)

Next: End

NO OBVIOUS FAULT

OVERHEAT INFORMATION

Next: End

SHOWING OVERHEAT WHEN SHOULDNT (OVERHEAT)

PCB (AQUASTAT)

Next: End

OVERHEAT STAT SECTION (OVERHEAT)

HARNESS

Next: End

DEMAND WHEN SHOULD NOT BE

Next: End

RUNNING WITH NO DEMAND

PCB (AQUASTAT)

Next: End

APS SECTION 2

HARNESS

Next: End

DIRTY OR RUNNING SLOW

FAN ASSEMBLY

Next: End

SHORTED OR SPARKING IN WRONG PLACE

ELECTRODE - IGNITION

Next: End

NOT RUNNING

PUMP - NOT RUNNING

Next: End

NOT RUNNING (OVERHEAT)

PUMP - NOT RUNNING

Next: End

HOT WATER NOT WORKING PROPERLY

Next: End

NO PERMANENT SUPPLY TO BOILER

Next: End

BLANK FOR MAINS FUSE INVESTIGATION

Z REDIRECTION

Next: End

THERMISTOR SECTION 2

HARNESS

Next: End

NO DHW DEMAND

Next: End

BOTH REQUIRED

PCB (IGNITION CONTROL BOX) AND GAS VALVE - RESISTANCE OK

Next: End

BLANK FOR APPLIANCE FUSE INVESTIGATION

Z REDIRECTION

Next: End

THERMISTOR SECTION

HARNESS

Next: End

NO POWER SUPPLY TO PUMP

PCB (AQUASTAT)

Next: End

QADAI THERMISTOR

RESULT AS EXPECTED

Next: End

QADAI GAS VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

QADAI POTENTIOMETER RESISTANCE

RESULT AS EXPECTED

Next: End

QADAI FAN RESISTANCE

RESULT AS EXPECTED

Next: End

QADAI FAN VOLTAGE

RESULT AS EXPECTED

Next: End

QADAI GAS VALVE VOLTAGE

RESULT AS EXPECTED

Next: End

NOT RUNNING

FAN ASSEMBLY

Next: End

NO PERMANENT SUPPLY TO CONTROL BOX

PCB (AQUASTAT)

Next: End

NO POWER TO FAN

CONTROL BOX - IGNITION - HONEYWELL

Next: End

APS SECTION

HARNESS

Next: End

STUCK MADE

PRESSURE SWITCH

Next: End

NO DEMAND TO CONTROL BOX

PCB (AQUASTAT)

Next: End

BOILER REACHES TEMPERATURE BUT RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION CH

Next: p144

BOILER AND RADIATORS FAIL TO REACH TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p146

CH OPERATES SATISFACTORILY BUT BOILER IS NOISY

CHARACTERISTIC TEST FROM OPERATION CH

Next: p148

RED OVERHEAT LED ILLUMINATES BEFORE BURNER IGNITION

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p176

BOILER OVERHEATS BEFORE 80 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER TO MAX TEMP

Next: !p322

BOILER SIGNIFICANTLY EXCEEDS 80 DEGREES AND BURNER REMAINS LIT

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER TO MAX TEMP

Next: p324

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: !p376

BOILER DOES NOT RUN WITH DHW DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p393

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p105

BURNER IGNITES BUT BAFFLES OR LIFTS OFF

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p95

SPARKING DOES NOT OCCUR (OVERHEAT LED DOES NOT ILLUMINATE)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p344

SPARKING OCCURS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p99

01/06/2023 08:24:59 2303_1_50_1 21/06/2023 12:26:30

15/06/2023 11:17:49

Next: End

VOLTAGE GAS VALVE AT CONTROL BOX

REMOVE THE IGNITION

Next: !p128, f129

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p130, !f401

PRESSURE GAS INLET

ATTACH A PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: !p166, !f164

RESISTANCE OVERHEAT STAT

REMOVE THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p179, !f181

RESISTANCE FAN AND HARNESS (FUSE INVESTIGATION)

REMOVE THE CONNECTOR FROM THE IGNITION CONTROL BOX

Next: p254, f260

RESISTANCE FAN (FUSE INVESTIGATION)

REMOVE THE WIRES FROM THE FAN ASSEMBLY

Next: !p264, !f265

RESISTANCE FAN AND HARNESS (FUSE INVESTIGATION)

REMOVE THE CONNECTOR FROM THE IGNITION CONTROL BOX

Next: p269, f270

RESISTANCE FAN (FUSE INVESTIGATION)

REMOVE THE WIRES FROM THE FAN ASSEMBLY

Next: !p271, !f272

OBSERVATION BURNER IGNITES OR OVERHEAT LED

ENSURE APPLIANCE IS COOL
BOILER THERMOSTAT TO MAX

Next: p302, f331

VOLTAGE AC TO PUMP AT APPLIANCE

Next: !p367, f306

RESISTANCE HARNESS PUMP SUPPLY

REMOVE CONNECTOR X6 FROM THE PCB

Next: !p307, !f308

RESISTANCE OVERHEAT STAT AND HARNESS

REMOVE CONNECTOR X4/X7 FROM THE PCB

Next: !p332, f333

RESISTANCE OVERHEAT STAT

REMOVE THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p334, !f335

VOLTAGE AC FROM EXTERNAL CONTROLS (NO DEMAND)

ENSURE NO DEMANDS

Next: !p338, f339

VOLTAGE DC DEMAND AT IGNITION CONTROL BOX (NO DEMAND)

ENSURE NO DEMANDS

Next: p340, !f341

RESISTANCE APS AND HARNESS WITH KIT

CONNECT THE APS TESTING KIT AND FGA TO THE APS
(POSITIVE CONNECTIONS)

Next: p357, f347

RESISTANCE APS WITH KIT

REMOVE THE WIRES AND

Next: !p348, !f349

RESISTANCE MAINS FUSE

REMOVE FUSE FROM FUSED SPUR

Next: !p386, f387

FUSE FURTHER INVESTIGATION (MAINS)

THE INFORMATION PROV

Next: !p388, !f389

RESISTANCE THERMISTOR

REMOVE THE WIRES FROM THE THERMISTOR

Next: !p391, !f392

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p407, !f408

FUSE FURTHER INVESTIGATION (APPLIANCE)

THE INFORMATION PROV

Next: !p412, !f413

RESISTANCE THERMISTOR

REMOVE THE WIRES FROM THE THERMISTOR

Next: !p420, !f421

RESISTANCE THERMISTOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p447, !f448

RESISTANCE FAN (FUSE INVESTIGATION)

REMOVE THE WIRES FROM THE FAN ASSEMBLY

Next: !p459, !f461

VOLTAGE AC FAN AT CONTROL BOX

RESET LOCKOUT AS NECESSARY

Next: !p464, !f450

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: !p451, !f452

VOLTAGE GAS VALVE AT CONTROL BOX

REMOVE THE IGNITION

Next: !p465, !f454

RESISTANCE POTENTIOMETER CONTROL SIDE

REMOVE CONNECTOR X1 FROM THE PCB
BOILER THERMOSTAT SET TO MAX

Next: !p457, !f458

VOLTAGE AC PERMANENT SUPPLY

Next: p7, f385

OBSERVATION REMOVE PINK DOES FAN NOW RUN

REMOVE THE CONNECTOR

Next: p67, f73

VOLTAGE AC FAN AT CONTROL BOX

RESET LOCKOUT AS NECESSARY

Next: p74, f77

VOLTAGE AC PERMANENT SUPPLY TO CONTROL BOX

Next: p78, f79

RESISTANCE HARNESS AQUASTAT PCB TO CONTROL BOX

REMOVE CONNECTOR X5 FROM THE AQUASTAT PCB

Next: !p80, !f81

VOLTAGE AC TO PUMP AT APPLIANCE

Next: !p366, f6

RESISTANCE APS AT REST

REMOVE THE WIRES FROM THE AIR PRESSURE SWITCH
(NOTING THEIR LOCATIONS)

Next: !p84, f85

INSPECTION APS TUBES / PIPES

REMOVE THE FAN ASSEMBLY

Next: !p86, !f87

PRESSURE GAS INLET (IGNITION)

ATTACH A PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p107, !f106

PRESSURE BURNER IGNITION

ATTACH A PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p108, !f109

INSPECTION RECTIFICATION ELECTRODE AND LEAD

DISCONNECT RECTIFICATION LEAD FROM IGNITION CONTROL BOX (REAR LEAD)

Next: p110, !f111

INSPECTION BURNER

Next: p112, !f114

INSPECTION INJECTOR

REMOVE THE BURNER ASSEMBLY

Next: !p113, !f115

INSPECTION FLUEWAYS

Next: !p117, !f119

PRESSURE BURNER IGNITION

ATTACH A PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p121, f125

INSPECTION IGNITION ELECTRODE GAP

Next: p122, !f126

INSPECTION BURNER

Next: !p123, !f127

LIMPET PUMP

Next: p149, !f153

PRESSURE BURNER

ATTACH A PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p154, f157

PRESSURE BURNER

ATTACH A PRESSURE GAUGE TO THE BURNER PRESSURE TEST POINT

Next: p167, !f169

INSPECTION EXTERNAL BYPASS

Next: !p150, !f152

RESISTANCE THERMISTOR

REMOVE THE WIRES FROM THE THERMISTOR

Next: p155, !f158

RESISTANCE POTENTIOMETER CONTROL SIDE

REMOVE CONNECTOR X1 FROM THE PCB
BOILER THERMOSTAT SET TO MAX

Next: p396, !f159

INSPECTION INJECTOR

REMOVE THE BURNER ASSEMBLY

Next: !p161, !f162

LIMPET PUMP

Next: !p168, !f170

RESISTANCE OVERHEAT STAT AND HARNESS

REMOVE CONNECTOR X4/X7 FROM THE PCB

Next: !p182, f178

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: p255, !f261

RESISTANCE HARNESS INCOMING MAINS (FUSE INVESTIGATION)

REMOVE CONNECTOR X4

Next: p256, !f262

RESISTANCE PUMP AND HARNESS

Next: p257, !f266

OBSERVATION REMOVE PERMANENT MAINS SUPPLY TO APPLIANCE

REMOVE THE INCOMING

Next: !p258, !f259

RESISTANCE GAS VALVE

REMOVE THE IGNITION CONTROL BOX FROM THE GAS VALVE

Next: p273, !f274

RESISTANCE HARNESS INCOMING MAINS (FUSE INVESTIGATION)

REMOVE CONNECTOR X4

Next: p275, !f276

RESISTANCE PUMP AND HARNESS

Next: !p282, !f278

OBSERVATION PUMP RUNS

LOCATE SYSTEM PUMP
BOILER THERMOSTAT SET TO MAX

Next: p303, f304

LIMPET PUMP

Next: p311, !f312

INSPECTION EXTERNAL BYPASS

Next: p313, !f314

RESISTANCE THERMISTOR

REMOVE THE WIRES FROM THE THERMISTOR

Next: p315, !f316

RESISTANCE POTENTIOMETER CONTROL SIDE

REMOVE CONNECTOR X1 FROM THE PCB
BOILER THERMOSTAT SET TO MAX

Next: p317, !f318

OBSERVATION RUN BOILER TO MAX TEMP

ATTACH A TEMPERATURE CLAMP ON THE CH FLOW PIPE AS NEAR AS POSSIBLE TO THE APPLIANCE

Next: p319, ?321, ?323

INFORMATION PUMP OVERRUN

Next: !p329, !f369

VOLTAGE DC DEMAND AT IGNITION CONTROL BOX

Next: p325, !f326

RESISTANCE HARNESS AQUASTAT PCB TO CONTROL BOX

REMOVE CONNECTOR X5 FROM THE AQUASTAT PCB

Next: !p327, !f328

RESISTANCE HARNESS AQUASTAT PCB TO CONTROL BOX

REMOVE CONNECTOR X5 FROM THE AQUASTAT PCB

Next: !p342, !f343

OBSERVATION SPARKING AT IGNITION CONTROL BOX

UNCLIP AQUASTAT PCB

Next: !p356, f345

INSPECTION FLUEWAYS

Next: p350, !f351

INSPECTION APS TUBES / PIPES

REMOVE THE FAN ASSEMBLY

Next: p352, !f353

INSPECTION FLUE

Next: !p354, !f355

OBSERVATION SPARKING AT IGNITION CONTROL BOX WITH APS MADE

ENSURE CONNECTOR IS

Next: p346, !f365

RESISTANCE THERMISTOR

REMOVE THE WIRES FROM THE THERMISTOR

Next: !p394, !f395

INSPECTION BURNER

Next: p160, !f400

RESISTANCE FUSE

REMOVE FUSE FROM INLINE FUSE HOLDER
(PUSH IN AND TWIST ANTICLOCKWISE TO UNDO)

Next: p414, f411

RESISTANCE HARNESS PUMP SUPPLY

REMOVE CONNECTOR X6 FROM THE PCB

Next: p415, !f416

RESISTANCE HARNESS INCOMING MAINS

REMOVE CONNECTOR X4 / X7 FROM THE PCB

Next: p417, !f424

RESISTANCE THERMISTOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p418, f419

RESISTANCE POTENTIOMETER SWITCH

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p422, !f423

RESISTANCE THERMISTOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: p69, f390

RESISTANCE POTENTIOMETER CONTROL SIDE

REMOVE CONNECTOR X1 FROM THE PCB
BOILER THERMOSTAT SET TO MAX

Next: p88, !f72

VOLTAGE AC FROM EXTERNAL CONTROLS

Next: p410, !f27

VOLTAGE AC FAN AT FAN

GAIN ACCESS TO THE FAN ASSEMBLY

Next: !p75, !f76

RESISTANCE APS AND HARNESS AT REST

REMOVE CONNECTOR FROM IGNITION CONTROL BOX

Next: !p82, f83

RESISTANCE HARNESS AQUASTAT PCB TO CONTROL BOX

REMOVE CONNECTOR X5 FROM THE AQUASTAT PCB

Next: !p89, !f90

INSPECTION BURNER

Next: p116, !f118

PRESSURE GAS INLET (IGNITION)

ATTACH A PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p120, !f124

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