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:

4758135 RAVENHEAT LS100 WITH HONEYWELL IGNITION BOARD

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

RAVENHEAT LS100 LPG

G.C. NUMBER 47 581 3

Next: &5, !f2

DHW FLOW RATE

TURN HOT WATER TAP ON

Next: &15, f6

DHW PUMP RUNS

Next: &755, f16

DHW MODULATION

LOOSEN THE OUTLET TE

Next: &135, f128

CH IGNITION

Next: &147, f1080

CH OPERATION

LOOSEN THE OUTLET TEST POINT SCREW (P2) AND ATTACH U-GAUGE TO THE TEST POINT.

Next: &170, ?148, ?150, ?152

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO HEATING AND HOT WATER POSITION

Next: &172, !f171

CH MODULATION

LOOSEN THE OUTLET TEST POINT SCREW (P2) AND ATTACH U-GAUGE TO THE TEST POINT.

Next: &178, f173

CH PUMP OVERRUNS

Next: &nff, f179

OBSERVATION FAN RUNS DHW

Next: &792, f756

DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

LOOSEN THE OUTLET TEST POINT SCREW (P2) AND ATTACH U-GAUGE TO THE TEST POINT.

Next: &924, ?793, ?795, ?797, ?799, ?801

DHW OPERATION

Next: &127, ?925, ?927, ?929, ?931

FUSE INVESTIGATION DUMMY

NOT USED

Next: &nff, f1120

NO FAN

THERMOSTAT- OVERHEAT

Next: End

FLOW SENSOR - FAN NOT RUNNING

SENSOR CH

Next: End

FAN NOT RUNNING

SENSOR DHW

Next: End

BURNER CROSS LIGHTS BUT BAFFLES OUT

FLUE

Next: End

CROSSLIGHTS BUT BAFFLES

GAS INLET PRESSURE

Next: End

BAFFLING

PCB

Next: End

MOD SOL - BAFFLING

GAS VALVE

Next: End

HEAT EX FLUE

HEAT EXCHANGER (FLUEWAYS)

Next: End

BAFFLES OUT

SEAL - COMBUSTION CHAMBER

Next: End

SPARKING

ELECTRODE LEAD

Next: End

SPARK GAP

ELECTRODE

Next: End

SPARKING

SEAL - COMBUSTION CHAMBER

Next: End

SPARKING

TUBES - PRESSURE SWITCH

Next: End

SPARKING

FLUE VENTURI

Next: End

SPARKING

FLUE

Next: End

SPARKING

AIR PRESSURE SWITCH

Next: End

PUMP RUNS

SWITCH - SUMMER/WINTER

Next: End

NOT SWITCHING

TIMER - DIGITAL

Next: End

NO HEATING

SENSOR CH

Next: End

CH POT

CH POTENTIOMETER

Next: End

DHW FAN DOES NOT RUN

POTENTIOMETER DHW

Next: End

FUSE INVESTIGATION

FAN

Next: End

FUSE INVESTIGATION

PUMP

Next: End

FUSE INVESTIGATION

GAS VALVE

Next: End

FUSE INVESTIGATION

PCB - IGNITION CONTROL

Next: End

NOT LIGHTING

GAS INLET PRESSURE

Next: End

BURNER DOES NOT LIGHT

PCB - IGNITION CONTROL

Next: End

NOT LIGHTING

GAS VALVE

Next: End

DHW PUMP RUNS

MAINS FUSE

Next: End

PUMP DOES NOT RUN

SWITCH - MAIN

Next: End

LOW WATER

SYSTEM PRESSURE

Next: End

DHW PUMP RUNS

SENSOR DHW

Next: End

DHW PUMP RUNS

SENSOR CH

Next: End

DHW PUMP RUNS

FLOW SWITCH - 3 WAY VALVE

Next: End

DV PUMP RUNS

PCB

Next: End

DHW PUMP RUNS

FUSE F2 (2 AMP)

Next: End

DOES NOT LIGHT - SPARKING SEEN

ELECTRODE

Next: End

DHW RUNS HOT COLD

SENSOR CH

Next: End

DHW COOL RADS COOL

SENSOR CH

Next: End

PUMP RUNS

DIVERTER VALVE 3 - WAY

Next: End

NOT LIGHTING

BURNER

Next: End

DHW COOL

INJECTOR

Next: End

DHW TOO COOL RADIATORS COLD

POTENTIOMETER DHW

Next: End

DHW MODULATION

POTENTIOMETER DHW

Next: End

BOILER UP TO TEMP, RADIATORS COLD

DIVERTER VALVE 3 - WAY

Next: End

BOILER NOISY, KETTLING

DIVERTER VALVE 3 - WAY

Next: End

EXP VESS

EXPANSION VESSEL

Next: End

CH MODULATION

SENSOR CH

Next: End

CH MODULATION

CH POTENTIOMETER

Next: End

CH PUMP OVERRUNS

SENSOR CH

Next: End

START

START

Next: End

DHW MODULATION

SENSOR DHW

Next: End

BOILER COLD, RADIATORS COLD

CH POTENTIOMETER

Next: End

BOILER COLD, RADIATORS COLD

SENSOR CH

Next: End

BOILER NOISY, KETTLING

PUMP

Next: End

TOO HOT

CH POTENTIOMETER

Next: End

TOO HOT

SENSOR CH

Next: End

SYSTEM BYPASS

Next: End

BOILER UP TO TEMP, RADIATORS COLD

PUMP

Next: End

BOILER UP TO TEMP, RADIATORS COLD

Next: End

SHUTING OFF EARLY

SENSOR CH

Next: End

SHUTING DOWN EARLY

CH POTENTIOMETER

Next: End

AIR PRESSURE SWITCH TUBES

TUBES - PRESSURE SWITCH

Next: End

FLUE VENTURI

FLUE VENTURI

Next: End

FLUE

FLUE

Next: End

NO FAN

PCB - IGNITION CONTROL

Next: End

FAN

WIRING HARNESS

Next: End

FAN IMPELLOR

FAN IMPELLOR

Next: End

DHW FLOW RATE

DHW ISOLATING VALVE

Next: End

SPARKING CONTINUES

GAS INLET PRESSURE

Next: End

TSPARKING CONTINUES

PCB

Next: End

MOD SOL -SPARKING CONTINUES

GAS VALVE

Next: End

DOESN'T CROSS LIGHT, PRESSURE ABSENT

GAS INLET PRESSURE

Next: End

DOESN'T CROSS LIGHT, PRESSURE ABSENT

PCB

Next: End

MOD SOL - NOT CROSS LIGHTING

GAS VALVE

Next: End

NOT CROSS LIGHTING

INJECTOR

Next: End

NOT CROSS LIGHTING

BURNER

Next: End

NOT CROSS LIGHTING

HEAT EXCHANGER (FLUEWAYS)

Next: End

LOW BURNER PRESS

SENSOR CH

Next: End

BURNER PRESSURE LOW

SENSOR DHW

Next: End

LOW BRUNER PRESS

POTENTIOMETER DHW

Next: End

BURNER PRESSURE LOW

GAS INLET PRESSURE

Next: End

MOD SOL

GAS VALVE

Next: End

PUMP

WIRING HARNESS

Next: End

DHW NOISY

POTENTIOMETER DHW

Next: End

DHW NOISY

SENSOR DHW

Next: End

DHW OPERATION (EFFICIENCY)

PUMP

Next: End

DHW TOO COOL RADIATORS COLD

SENSOR DHW

Next: End

DHW CYCLING

PUMP

Next: End

DHW SENSOR (FULL DEMAND)

SENSOR DHW

Next: End

DHW RUNS HOT AND COLD BURNER CYCLES ON AND OFF

POTENTIOMETER DHW

Next: End

IGNITION PCB NEUTRAL

WIRING HARNESS

Next: End

OVERHEAT

WIRING HARNESS

Next: End

FLOW SENSOR - FAN NOT RUNNING

WIRING HARNESS

Next: End

FAN NOT RUNNING DHW SENSOR

WIRING HARNESS

Next: End

BAFFLES OUT

ELECTRODE SENSING IGNTION

Next: End

BAFFELS OUT

CABLE - SENSING ELECTRODE

Next: End

BAFFLES OUT

PCB - IGNITION CONTROL

Next: End

BAFFLING

GAS VALVE ADJUSTMENT

Next: End

NO SPARK

PCB - IGNITION CONTROL

Next: End

NO SPARKING

FAN

Next: End

APS NO SPARKING

WIRING HARNESS

Next: End

FLOW SENSOR - NO HEATING

WIRING HARNESS

Next: End

POTENITOMETER RESISTANCE CH

PCB

Next: End

NO SUPPLY EXT CONTROLS

PCB

Next: End

EXTERNAL CONTROLS

Next: End

FAN NOT RUNNING

PCB

Next: End

FUSE INVESTIGATION

WIRING HARNESS

Next: End

GAS INLET PRESSURE (FULL DEMAND)

GAS VALVE ADJUSTMENT

Next: End

NOT LIGHTING

INJECTOR

Next: End

DHW PUMP RUNS

Next: End

MAINS FUSE FURTHER INVESTIGATION

Z REDIRECT

Next: End

ON/OFF SWITCH

WIRING HARNESS

Next: End

LOW WATER

PRESSURE SWITCH - LOW WATER

Next: End

DHW SENSOR - DHW PUMP RUNS

WIRING HARNESS

Next: End

FLOW SENSOR - DHW PUMP RUNS

WIRING HARNESS

Next: End

F1 FUSE FURTHER INVESTIGAITON

Z REDIRECT

Next: End

FUSE INVESTIGATION

PCB FUSE INVESTIGATION

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW PUMP RUNS - RESISTANCE OK

FLOW SWITCH - 3 WAY VALVE

Next: End

DHW TOO COOL RADIATORS COLD

HEAT EXCHANGER

Next: End

BLOCKED

DIVERTER VALVE 3 - WAY

Next: End

CH MODULATION

PCB

Next: End

CH PUMP OVERRUNS

PCB

Next: End

DHW MODULATION

PCB

Next: End

DHW SENSOR - MOD

WIRING HARNESS

Next: End

BOILER COLD, RADIATORS COLD

PCB

Next: End

FLOW SENSOR - BOILER AND RADS COLD

WIRING HARNESS

Next: End

BOILER TOO HOT

PCB

Next: End

FLOW SENSOR - BOILER TOO HOT

WIRING HARNESS

Next: End

BOILER NOISY, KETTLING

HEAT EXCHANGER

Next: End

BOILER TOO HOT

Next: End

BOILER UP TO TEMP, RADIATORS COLD

Next: End

FLOW SENSOR - BOILER SHUT DOWN RADS COLD

WIRING HARNESS

Next: End

SHUTTING DOWN EARLY

PCB

Next: End

DHW MODULATION

GAS VALVE ADJUSTMENT

Next: End

CH MODULATION

GAS VALVE ADJUSTMENT

Next: End

APS

WIRING HARNESS

Next: End

AIR PRESSURE SWITCH

AIR PRESSURE SWITCH

Next: End

FAN

FAN

Next: End

SPARKING CONTINUES

GAS VALVE ADJUSTMENT

Next: End

FLAME SENSE

PCB - IGNITION CONTROL

Next: End

SPARKING CONTINUES

ELECTRODE SENSING IGNTION

Next: End

SPARKING CONTINUES

CABLE - SENSING ELECTRODE

Next: End

DOESNT CROSS LIGHT

GAS VALVE ADJUSTMENT

Next: End

NOT CROSS LIGHTING

FLUE

Next: End

BURNER PRESSURE LOW

PCB

Next: End

LOW IGN PRESSURE

GAS VALVE ADJUSTMENT

Next: End

DHW PUMP RUNS

PUMP

Next: End

SCALED

SECONDARY (DHW) HEAT EXCHANGER

Next: End

DHW TOO COOL RADIATORS HOT WITH NO CH DEMAND

DIVERTER VALVE 3 - WAY

Next: End

DHW OPERATION NOISY

HEAT EXCHANGER

Next: End

DHW NOISY

GAS VALVE ADJUSTMENT

Next: End

DHW NOISY

PCB

Next: End

DHW NOISY

WIRING HARNESS

Next: End

DHW NOISY OPERATION KETTLES

SECONDARY (DHW) HEAT EXCHANGER

Next: End

DHW SENSOR - DHW TOO COOL

WIRING HARNESS

Next: End

DHW CYCLING

SECONDARY (DHW) HEAT EXCHANGER

Next: End

DHW SENSOR - HOT WATER CYCLES

WIRING HARNESS

Next: End

DHW RUNS HOT AND COLD BURNER CYCLES ON AND OFF

PCB

Next: End

BROKEN NEUTRAL

PCB - IGNITION CONTROL

Next: End

OPEN CIRCUIT MEASURED BETWEEN BLUE WIRES

CHARACTERISTIC TEST FROM RESISTANCE HARNESS MAIN PCB TO IGNITION PCB

Next: !p1003

OPEN CIRCUIT MEASURED BETWEEN BLACK AND BROWN WIRES

CHARACTERISTIC TEST FROM RESISTANCE HARNESS MAIN PCB TO IGNITION PCB

Next: p1005

LEAD OK BUT ELECTRODE IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p1039

ELECTRODE OK BUT LEAD IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p1041

NO VOLTAGE PRESENT ON EITHER TEST

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL CONTROLS

Next: !p1095

16 VDC PRESENT ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL CONTROLS

Next: !p1097

DHW INLET FILTER BLOCKED

CHARACTERISTIC TEST FROM DIVERTER VALVE AND DHW FILTER

Next: !p12

DIVERTER VALVE BLOCKED

CHARACTERISTIC TEST FROM DIVERTER VALVE AND DHW FILTER

Next: !p14

BOILER NOISY, KETTLING

CHARACTERISTIC TEST FROM CH OPERATION

Next: p149

BOILER HOT BUT RADIATORS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p151

BOILER COLD, RADIATORS COLD

CHARACTERISTIC TEST FROM CH OPERATION

Next: p567

BURNER LIGHTS BUT PRESSURE REMAINS LOW

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p794

BURNER DOES NOT LIGHT

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p796

BURNER CROSS LIGHTS BUT DROPS OUT OR BAFFLES

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p1020

BURNER DOES NOT CROSS LIGHT CORRECTLY

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p800

BURNER IGNITES SMOOTHLY BUT SPARKING CONTINUES UNTIL LOCKOUT

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p802

LEAD OK BUT ELECTRODE IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p814

ELECTRODE OK BUT LEAD IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p816

DHW RUNS HOT AND COLD, BURNER CYCLES ON AND OFF

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p926

DHW TOO COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p928

DHW TOO COOL, RADS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p930

DHW NOISY OPERATION, KETTLES

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p932

MAINS VOLTAGE MEASURED ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE IGNITION BOARD IN

Next: !p984

NO VOLTAGE MEASURED ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE IGNITION BOARD IN

Next: p1000

28/09/2021 11:00:49 2109_1_50_1 10/11/2021 16:49:51

05/11/2021 10:19:00

Next: End

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p1010, !f1011

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p1014, !f1015

GAS INLET PRESSURE

LOOSEN THE INLET TEST POINT SCREW (P1) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p1047, !f1048

PRESSURE APS SWITCHING AT APS

DISCONNECT THE WIRES FROM THE APS NOTING CONNECTIONS

Next: !p1077, !f1078

ELECTRODE LEAD INSPECTION

DISCONNECT ELECTRODE LEAD FROM PCB AND ELECTRODE

Next: p1063, !f1064

SUMMER/WINTER SWITCH RESISTANCE

REMOVE 1 CONNECTOR F

Next: p1081, !f1082

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p1089, !f1090

RESISTANCE PUMP

DISCONNECT CONNECTOR CN8 FROM THE PCB

Next: p1121, !f1140

RESISTANCE FAN

DISCONNECT BROWN AND BLUE WIRES AT THE FAN

Next: !p1125, !f1139

GAS INLET PRESSURE

LOOSEN THE INLET TEST POINT SCREW (P1) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p1148, !f1147

RESISTANCE FUSE F2

REMOVE FUSE F2 (GREEN HOUSING) FROM PCB

Next: p1162, f1189

VOLTAGE MAINS INPUT

Next: p1164, f1165

RESISTANCE MAINS FUSE

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p1166, f1167

FUSE FURTHER INVESTIGATION

Next: !p1168, !f1169

SYSTEM PRESSURE

Next: !p1175, !f1176

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p1179, !f1180

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p1183, !f1184

FUSE FURTHER INVESTIGATION

Next: !p1190, !f1191

DHW MODULATION VOLTAGE

SET FLOW RATE AT TAP TO APPROXIMATELY 5 L/MIN

Next: !p716, f130

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: p494, !f132

PUMP VOLTAGE

GAIN ACCESS TO PCB
USE INSULATION MAT AS REQUIRED

Next: p885, f1161

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: p174, !f175

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p180, !f181

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p497, !f498

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p572, !f573

PUMP LIMPET TEST

Next: !p605, !f591

MODULATION VOLTAGE - CH

Next: !p717, f596

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: p597, !f598

DHW ISOLATING VALVE

Next: p7, !f8

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p601, !f602

PUMP LIMPET TEST

Next: p608, !f609

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: !p615, !f616

VOLTAGE IGNITION BOARD IN

Next: p757, ?983, ?998

RESISTANCE AIR PRESSURE SWITCH AT APS

DISCONNECT WIRES FROM APS NOTING CONNECTIONS

Next: !p778, f779

INSPECTION AIR PRESSURE SWITCH TUBES

Next: p780, !f781

GAS INLET PRESSURE

LOOSEN THE INLET TEST POINT SCREW (P1) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p805, !f806

GAS INLET PRESSURE

LOOSEN THE INLET TEST POINT SCREW (P1) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p819, !f820

PRESSURE APS SWITCHING AT PCB

DISCONNECT THE MIDDLE CONNECTOR FROM THE IGNITION PCB

Next: p1056, f1055

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: p875, !f876

DHW MODULATION

LOOSEN THE OUTLET TE

Next: p935, f936

DHW MODULATION VOLTAGE

SET FLOW RATE AT TAP TO APPROXIMATELY 5 L/MIN

Next: !p937, f938

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: p939, !f940

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p943, !f944

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p949, !f950

PUMP LIMPET TEST

Next: !p957, !f958

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: !p961, !f962

RESISTANCE HARNESS MAIN PCB TO IGNITION PCB

DISCONNECT PLUG CN8

Next: p1001, ?1002, ?1004

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1008, f1009

RESISTANCE OVERHEAT THERMOSTAT

DISCONNECT ONE OF THE WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p1006, !f1007

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1098, f1013

GAS PRESSURE ON IGNITION (BURNER)

ATTACH U-GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p798, f1046

FLAME SENSE ELECTRODE AND LEAD

DISCONNECT FLAME SENSE LEAD FROM ELECTRODE AND PCB

Next: p1037, ?1038, ?1040

FLUE CHECK

Next: p1042, !f1043

HEAT EXCHANGER INSPECTION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p1044, !f1053

GAS VALVE MODULATION VOLTAGE (IGNITION)

Next: p1049, !f1050

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p1051, !f1052

OBSERVATION SPARKING APS PROVED

CONNECT THE AIR PRESSURE SWITCH CHARGE KIT TO +VE CONNECTION ON THE AIR PRESSURE SWITCH

Next: p1067, f1062

SPARK ELECTRODE FITTING AND CONDITION

Next: !p1065, !f1066

CASE FITTED CORRECTLY

Next: p1068, !f1069

AIR PRESSURE SWITCH TUBES

Next: p1070, !f1071

INSPECTION FLUE VENTURI

Next: p1072, !f1073

FLUE CHECK

Next: !p1076, !f1075

RESISTANCE TIMER INTEGRAL

DISCONNECT THE ORANGE LEADS FROM THE INTEGRAL TIMER
INTEGRAL TIMER CALLING FOR HEAT

Next: p1083, !f1084

VOLTAGE EXTERNAL CONTROLS

Next: p1085, ?1094, ?1096

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1087, f1088

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p1091, !f1092

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p1099, !f1100

RESISTANCE FAN AND HARNESS

DISCONNECT THE MIDDLE PLUG (5 PINS) FROM THE IGNITION PCB

Next: p1123, f1124

RESISTANCE GAS VALVE

REMOVE IGNITION PCB FROM THE GAS VALVE
DISCONNECT LEADS TO MODULATING SOLENOID

Next: p1127, !f1141

RESISTANCE IGNITION PCB

DISCONNECT WIRES FROM IGNITION PCB AND REMOVE FROM GAS VALVE

Next: !p1193, !f1142

GAS VALVE VOLTAGE

UNPLUG THE IGNITION

Next: p1149, !f1150

GAS VALVE SOLENOID RESISTANCE

REMOVE THE PLUG FROM THE GAS VALVE

Next: !p1151, !f1152

SPARK ELECTRODE FITTING AND CONDITION

Next: p861, !f1192

VOLTAGE ON/OFF SWITCH OUTPUT

Next: p1172, f1163

RESISTANCE ON/OFF SWITCH

REMOVE 1 CONNECTOR FROM THE LEFT HAND SWITCH
(VIOLET/BLACK AND BROWN LEADS)

Next: !p1170, !f1171

LOW WATER PRESSURE SWITCH MADE

Next: p1173, f1174

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1177, f1178

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1181, f1182

DIVERTER VALVE MICROSWITCH (RESISTANCE)

DISCONNECT PLUG CONNECTOR CN4 FROM PCB
REMOVE THE MICROSWITCH FROM THE TOP OF THE DIVERTER VALVE

Next: p1185, !f1186

OBSERVATION DHW MICROSWITCH DISCONNECTED

REMOVE THE MICROSWITCH FROM THE TOP OF
THE DIVERTER VALVE AND MAKE SAFE

Next: p1208, !f1188

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: p959, !f1200

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (WHITE AND BLUE LEADS)

Next: p1212, !f1207

INSPECTION DIVERTER MOVEMENT

REMOVE THE MICROSWITCH FROM THE TOP OF THE DIVERTER VALVE AND PLACE IN A SAFE POSITION

Next: !p1209, !f1210

BURNER INJECTOR CONDITION

REMOVE GAS RAIL FROM BOILER FOR INSPECTION

Next: p1213, !f1214

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p1215, !f1216

DIVERTER VALVE CH POSITION

Next: p589, !f165

DIVERTER VALVE CH POSITION

Next: p606, !f159

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p176, !f177

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: !p495, f496

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: p568, !f569

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: !p570, f571

DIFFERENTIAL TEMPERATURE (HEATING)

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES UNDERNEATH BOILER

Next: p592, f590

GAS PRESSURE - CH

LOOSEN THE OUTLET TEST POINT SCREW (P2) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p593, f594

SYSTEM BYPASS

Next: !p603, !f604

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: !p599, f600

DIFFERENTIAL TEMPERATURE (HEATING)

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES UNDERNEATH BOILER

Next: p612, f607

SYSTEM BYPASS

Next: !p610, !f611

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: p613, !f618

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: !p617, f614

FLOW BLOCKAGE OR DAMAGE

BOILERS DHW CIRCUIT FULLY DRAINED AND DISCHARGED

Next: !p9, ?11, ?13

RESISTANCE AIR PRESSURE SWITCH AT PCB

Next: p776, f777

VOLTAGE FAN AT PCB

Next: p786, !f787

INSPECTION FLUE VENTURI

Next: p782, !f783

INSPECTION FLUE

Next: !p784, !f785

VOLTAGE FAN AT FAN

Next: p788, !f789

INSPECTION FAN FREE TO SPIN

Next: !p790, !f791

GAS VALVE MODULATION VOLTAGE

Next: p873, f874

SPARKING AT ELECTRODE

Next: p845, f846

CASE FITTED CORRECTLY

Next: p1036, !f1054

GAS PRESSURE ON IGNITION (BURNER)

ATTACH U-GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p817, f818

GAS PRESSURE ON IGNITION (BURNER)

ATTACH U-GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p803, f804

FLAME SENSE ELECTRODE AND LEAD

DISCONNECT FLAME SENSE LEAD FROM ELECTRODE AND PCB

Next: !p811, ?813, ?815

GAS VALVE MODULATION VOLTAGE (IGNITION)

Next: p807, !f808

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p809, !f810

BURNER INJECTOR CONDITION

REMOVE GAS RAIL FROM BOILER FOR INSPECTION

Next: p825, !f826

GAS VALVE MODULATION VOLTAGE (IGNITION)

Next: p821, !f822

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p823, !f824

BURNER CONDITION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: p827, !f828

HEAT EXCHANGER INSPECTION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p829, !f830

GAS PRESSURE ON IGNITION (BURNER)

ATTACH U-GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p1153, f1146

BURNER CONDITION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p1158, !f1211

GAS INLET PRESSURE

LOOSEN THE INLET TEST POINT SCREW (P1) AND ATTACH U-GAUGE TO THE TEST POINT

Next: p881, !f882

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (WHITE LEADS)

Next: p877, !f878

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p879, !f880

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p883, !f884

RESISTANCE PUMP HARNESS

DISCONNECT PLUG FROM PUMP

Next: !p887, !f886

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: p955, f956

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1201, f948

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: !p933, f934

PUMP LIMPET TEST

Next: !p945, !f946

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: !p941, f942

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB (CN14)

Next: p1196, f960

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED CN15

Next: !p963, !f964

System Information

  • Total Tests: 334
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control