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:

4758134 RAVENHEAT LS100T WITH SINGLE COMBINED PCB

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

RAVENHEAT LS100

G.C. NUMBER 47 581 3

Next: &661, !f2

OPERATIONAL SEQUENCE

Next: &5, !f658

DHW FLOW RATE

Next: &15, f6

DHW PUMP RUNS

REMOVE THE VENT PLUG FROM THE PUMP

Next: &37, f16

DHW FAN RUNS

Next: &51, f38

DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

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

Next: &106, ?52, ?54, ?58, ?393

DHW OPERATION

Next: &127, ?107, ?109, ?111, ?113

DHW MODULATION

LOOSEN THE OUTLET TE

Next: &135, f128

CH IGNITION

Next: &147, f380

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

GAS VALVE VARIATION

DURING THE PRODUCTIO

Next: &3, !f662

OVERHEAT FAULT

OUTSIDE MODEL

Next: &nff, f850

FUSE INVESTIGATION DUMMY

OUTSIDE MODEL

Next: &nff, f1077

OVERHEAT INVESTIGATIONPUMP RUNS

SWITCH - MAIN

Next: End

OVERHEAT INVESTIGATIONDHW PUMP RUNS

FUSE F1 (2A)

Next: End

OVERHEAT INVESTIGATIONLOW WATER

SYSTEM PRESSURE

Next: End

OVERHEAT INVESTIGATIONPUMP RUNS

SENSOR DHW

Next: End

OVERHEAT INVESTIGATIONPUMP RUNS

SENSOR CH

Next: End

OVERHEAT INVESTIGATIONDHW PUMP RUNS

FLOW SWITCH 3 WAY VALVE MICROSWITCH

Next: End

OVERHEAT INVESTIGATIONDV PUMP RUNS

PCB

Next: End

BURNER PRESSURE LOW

GAS INLET PRESSURE

Next: End

OVERHEAT INVESTIGATIONPUMP RUNS

SWITCH - SUMMER/WINTER

Next: End

MOD SOL

GAS VALVE

Next: End

OVERHEAT INVESTIGATIONNO HEATING

SENSOR CH

Next: End

OVERHEAT INVESTIGATIONCH POT

CH POTENTIOMETER

Next: End

OVERHEAT INVESTIGATIONLOW BURNER PRESS

SENSOR CH

Next: End

OVERHEAT INVESTIGATIONBURNER PRESSURE LOW

SENSOR DHW

Next: End

OVERHEAT INVESTIGATIONLOW BRUNER PRESS

DHW POTENTIOMETER

Next: End

OVERHEAT INVESTIGATIONBURNER PRESSURE LOW

GAS INLET PRESSURE

Next: End

OVERHEAT INVESTIGATIONMOD SOL

GAS VALVE

Next: End

OVERHEAT INVESTIGATION

SECONDARY (DHW) HEAT EXCHANGER

Next: End

OVERHEAT INVESTIGATION

HEAT EXCHANGER

Next: End

FUSE INVESTIGATION

PUMP

Next: End

FUSE INVESTIGATION

FAN

Next: End

FUSE INVESTIGATION - MODULATION SOLENOID

GAS VALVE

Next: End

DHW PUMP RUNS

MAINS FUSE

Next: End

DHW PUMP RUNS

FUSE F1 (2A)

Next: End

DOES NOT LIGHT - SPARKING SEEN

ELECTRODE

Next: End

DHW COOL RADS COOL

SENSOR CH

Next: End

DHW RUNS HOT COLD

SENSOR CH

Next: End

FUSE INVESTIGATION - MAIN SOLENOID

GAS VALVE

Next: End

PUMP RUNS

DIVERTER VALVE 3 -WAY

Next: End

NOT LIGHTING

GAS INLET PRESSURE

Next: End

NOT LIGHTING

PCB

Next: End

NOT LIGHTING

GAS VALVE

Next: End

NOT LIGHTING

BURNER

Next: End

NOT SWITCHING

INTERNAL TIMER

Next: End

NO HEATING

SENSOR CH

Next: End

CH POT

CH POTENTIOMETER

Next: End

DHW MODULATION

DHW POTENTIOMETER

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

PUMP RUNS

SWITCH - MAIN

Next: End

START

START

Next: End

OH THERMOSTAT

THERMOSTAT- OVERHEAT

Next: End

PUMP RUNS

SWITCH - SUMMER/WINTER

Next: End

HEAT EX FLUE

HEAT EXCHANGER (FLUEWAYS)

Next: End

GAS INLET PRES

GAS INLET PRESSURE

Next: End

BURNER CROSS LIGHTS BUT BAFFLES OUT

FLUE

Next: End

BAFFLES OUT

SEAL - COMBUSTION CHAMBER

Next: End

AIR PRESSURE SWITCH TUBES

TUBES- PRESSURE SWITCH

Next: End

DOESN'T CROSS LIGHT, PRESSURE ABSENT

GAS INLET PRESSURE

Next: End

MOD SOL - NOT CROSS LIGHTING

GAS VALVE

Next: End

DOESN'T CROSS LIGHT, PRESSURE ABSENT

PCB

Next: End

FLUE VENTURI

FLUE VENTURI

Next: End

FLUE

FLUE

Next: End

DHW SENSOR (FULL DEMAND)

SENSOR DHW

Next: End

DHW RUNS HOT AND COLD BURNER CYCLES ON AND OFF

DHW POTENTIOMETER

Next: End

DHW CYCLING

PUMP

Next: End

DHW TOO COOL RADIATORS COLD

SENSOR DHW

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

NOT CROSS LIGHTING

INJECTOR- BURNER

Next: End

NOT CROSS LIGHTING

BURNER

Next: End

NOT CROSS LIGHTING

HEAT EXCHANGER (FLUEWAYS)

Next: End

FAN IMPELLOR

FAN IMPELLOR

Next: End

PUMP RUNS

SENSOR DHW

Next: End

PUMP RUNS

SENSOR CH

Next: End

DHW PUMP RUNS

FLOW SWITCH 3 WAY VALVE MICROSWITCH

Next: End

LOW WATER

SYSTEM PRESSURE

Next: End

SEQ OF OPS

SEQ OF OPS

Next: End

GAS VALVE VARIATION

GAS VALVE VARIATION

Next: End

DHW NOISY

DHW POTENTIOMETER

Next: End

DHW NOISY

SENSOR DHW

Next: End

DHW OPERATION (EFFICIENCY)

PUMP

Next: End

DHW COOL

INJECTOR- BURNER

Next: End

DV PUMP RUNS

PCB

Next: End

LOW BURNER PRESS

SENSOR CH

Next: End

BURNER PRESSURE LOW

SENSOR DHW

Next: End

LOW BRUNER PRESS

DHW POTENTIOMETER

Next: End

SPARKING

AIR PRESSURE SWITCH

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

DHW FLOW RATE

DHW ISOLATING VALVE

Next: End

FLOW SENSOR - FAN NOT RUNNING

SENSOR CH

Next: End

FAN NOT RUNNING

SENSOR DHW

Next: End

FAN NOT RUNNING

DHW POTENTIOMETER

Next: End

LOW WATER NO FAN

SYSTEM PRESSURE

Next: End

FAULT CODE

THERMOSTAT- OVERHEAT

Next: End

OVERHEAT FAULT

PCB

Next: End

RUNNING SLOW - OVERHEAT INVESTIGATION

PUMP

Next: End

OVERHEAT INVESTIGATION CH SENSOR

SENSOR CH

Next: End

OVERHEAT INVESTIGATION - NO PUMP OVERRUN

PCB

Next: End

OVERHEAT INVESTIGATIONDHW PUMP RUNS

Next: End

OVERHEAT INVESTIGATIONLOW WATER

PRESSURE SWITCH - LOW WATER

Next: End

OVERHEAT INVESTIGATIONDHW SENSOR - PUMP RUNS

WIRING HARNESS

Next: End

OVERHEAT INVESTIGATIONFLOW SENSOR - PUMP RUNS

WIRING HARNESS

Next: End

OVERHEAT INVESTIGATIONPUMP RUNS

DIVERTER VALVE 3 -WAY

Next: End

OVERHEAT INVESTIGATIONNO SUPPLY PROGRAMMER

PCB

Next: End

OVERHEAT INVESTIGATIONPROGRAMMER

Next: End

OVERHEAT INVESTIGATIONNO SUPPLY EXT CONTROLS

PCB

Next: End

OVERHEAT INVESTIGATIONEXTERNAL CONTROLS

Next: End

OVERHEAT INVESTIGATIONFLOW SENSOR - NO HEATING

WIRING HARNESS

Next: End

OVERHEAT INVESTIGATIONPOTENITOMETER RESISTANCE CH

PCB

Next: End

OVERHEAT INVESTIGATION

Next: End

OVERHEAT INVESTIGATIONBURNER PRESSURE LOW

PCB

Next: End

OVERHEAT INVESTIGATIONLOW IGN PRESSURE

GAS VALVE ADJUSTMENT

Next: End

FUSE INVESTIGATION

WIRING HARNESS

Next: End

DHW PUMP RUNS

Next: End

F1 FUSE FURTHER INVESTIGAITON

Z REDIRECT

Next: End

MAINS FUSE FURTHER INVESTIGATION

Z REDIRECT

Next: End

DHW TOO COOL RADIATORS HOT WITH NO CH DEMAND

DIVERTER VALVE 3 -WAY

Next: End

FUSE INVESTIGATION

PCB FUSE INVESTIGATION

Next: End

DHW PUMP RUNS - RESISTANCE OK

FLOW SWITCH 3 WAY VALVE MICROSWITCH

Next: End

GAS INLET PRESSURE (FULL DEMAND)

GAS VALVE ADJUSTMENT

Next: End

NO SUPPLY EXT CONTROLS

PCB

Next: End

EXTERNAL CONTROLS

Next: End

FLOW SENSOR - NO HEATING

WIRING HARNESS

Next: End

POTENITOMETER RESISTANCE CH

PCB

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW TOO COOL RADIATORS COLD

HEAT EXCHANGER

Next: End

BLOCKED

DIVERTER VALVE 3 -WAY

Next: End

DHW PUMP RUNS

PUMP

Next: End

CH MODULATION

PCB

Next: End

CH PUMP OVERRUNS

PCB

Next: End

FAN

FAN

Next: End

BAFFLES OUT

ELECTRODE SENSING IGNITION

Next: End

BAFFELS OUT

HARNESS FLAME SENSE

Next: End

FLAME SENSE

PCB

Next: End

AIR PRESSURE SWITCH

AIR PRESSURE SWITCH

Next: End

NOT LIGHTING

INJECTOR- BURNER

Next: End

DHW SENSOR - HOT WATER CYCLES

WIRING HARNESS

Next: End

DHW RUNS HOT AND COLD BURNER CYCLES ON AND OFF

PCB

Next: End

DHW CYCLING

SECONDARY (DHW) HEAT EXCHANGER

Next: End

DHW SENSOR - DHW TOO COOL

WIRING HARNESS

Next: End

DHW OPERATION NOISY

HEAT EXCHANGER

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

NOT CROSS LIGHTING

FLUE

Next: End

DHW SENSOR - PUMP RUNS

WIRING HARNESS

Next: End

FLOW SENSOR - PUMP RUNS

WIRING HARNESS

Next: End

LOW WATER

PRESSURE SWITCH - LOW WATER

Next: End

FAN

WIRING HARNESS

Next: End

LOW IGN PRESSURE

GAS VALVE ADJUSTMENT

Next: End

DOESNT CROSS LIGHT

GAS VALVE ADJUSTMENT

Next: End

DHW MODULATION

GAS VALVE ADJUSTMENT

Next: End

CH MODULATION

GAS VALVE ADJUSTMENT

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 TOO COOL RADIATORS COLD

DHW POTENTIOMETER

Next: End

BURNER PRESSURE LOW

PCB

Next: End

APS NO SPARKING

WIRING HARNESS

Next: End

NO SPARKING

FAN

Next: End

NO SPARK

PCB

Next: End

FLOW SENSOR - FAN NOT RUNNING

WIRING HARNESS

Next: End

FAN NOT RUNNING DHW SENSOR

WIRING HARNESS

Next: End

FAN NOT RUNNING

PCB

Next: End

LOW WATER NO FAN

PRESSURE SWITCH - LOW WATER

Next: End

SCALED

SECONDARY (DHW) HEAT EXCHANGER

Next: End

TRIPPING EARLY - OVERHEAT INVESTIGATION

THERMOSTAT- OVERHEAT

Next: End

OVERHEAT INVESTIGATION - NOT SHUTTING DOWN

PCB

Next: End

NO FAULT FOUND

OVERHEAT

Next: End

OVERHEAT INVESTIGATIONDHW PUMP RUNS

PUMP

Next: End

NO VOLTAGE PRESENT ON EITHER TEST

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL PROGRAMMER

Next: !p1045

16V DC PRESENT ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL PROGRAMMER

Next: !p1047

NO VOLTAGE PRESENT ON EITHER TEST

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL PROGRAMMER

Next: !p1050

16 VDC PRESENT ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL CONTROLS

Next: !p1052

DHW RUNS HOT AND COLD, BURNER CYCLES ON AND OFF

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p470

DHW TOO COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p110

DHW INLET FILTER BLOCKED

CHARACTERISTIC TEST FROM DIVERTER VALVE AND DHW FILTER

Next: !p12

DHW TOO COOL, RADS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p112

DHW NOISY OPERATION, KETTLES

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p114

NO VOLTAGE PRESENT ON EITHER TEST

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL PROGRAMMER

Next: !p1143

16 VDC PRESENT ON BOTH TESTS

CHARACTERISTIC TEST FROM VOLTAGE EXTERNAL CONTROLS

Next: !p1145

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 DOES NOT CROSS LIGHT CORRECTLY

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p394

LEAD OK BUT ELECTRODE IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p405

ELECTRODE OK BUT LEAD IN POOR CONDITION

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: !p407

BURNER LIGHTS BUT PRESSURE REMAINS LOW

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p53

BURNER DOES NOT LIGHT

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p337

BURNER CROSS LIGHTS BUT DOES NOT ESTABLISH / DROPS OUT / BAFFLES

CHARACTERISTIC TEST FROM DHW BURNER LIGHTS (PRESSURE TO MAXIMUM)

Next: p59

DIFFERENTIAL EXCESSIVE

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: p965

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM FLAME SENSE ELECTRODE AND LEAD

Next: p1039

OVERHEAT TRIPS BEFORE 85°C

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p987

FLOW TEMPERATURE ABOVE 90°C AND BOILER DOES NOT SHUT DOWN

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: p989

27/09/2021 15:18:09 2109_1_50_1 10/11/2021 16:47:29

02/11/2021 12:31:28

Next: End

SYSTEM PRESSURE

Next: !p1005, !f1006

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p1009, !f1010

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p1013, !f1014

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p1055, !f1056

GAS VALVE MODULATION VOLTAGE

Next: p1062, f1063

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: p1064, !f1065

RESISTANCE PUMP

DISCONNECT CONNECTOR M4 FROM THE PCB

Next: p1078, !f1079

RESISTANCE FAN

DISCONNECT BROWN AND BLUE WIRES AT THE FAN

Next: !p1082, !f1083

RESISTANCE MAINS FUSE

REMOVE THE FUSE FROM THE FUSED SPUR

Next: !p1087, f1089

FUSE FURTHER INVESTIGATION

Next: !p1095, !f1091

FUSE FURTHER INVESTIGATION

Next: !p1093, !f1094

GAS INLET PRESSURE

ATTACH U-GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p1131, !f1130

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p1148, !f1149

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 M11

Next: p494, !f132

PUMP VOLTAGE

USE INSULATION MAT AS REQUIRED

Next: !p17, f18

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: p174, !f175

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p180, !f181

ON/OFF SWITCH VOLTAGE (INPUT)

Next: p182, f1086

OVERHEAT THERMOSTAT RESISTANCE

REMOVE BOTH WIRES FROM THE OVERHEAT THERMOSTAT
ENSURE APPLIANCE IS COOL

Next: p780, !f379

AIR PRESSURE SWITCH RESISTANCE (NORMALLY OPEN)

REMOVE PLASTIC COVER FROM THE PCB
DISCONNECT THE CONNECTOR AT M3 FROM THE PCB

Next: p39, f40

SUMMER/WINTER SWITCH RESISTANCE

REMOVE 1 CONNECTOR F

Next: p1137, !f392

AIR PRESSURE SWITCH TUBES

Next: p41, !f42

GAS INLET PRESSURE

ATTACH U-GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p418, !f420

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p474, !f475

PUMP LIMPET TEST

Next: !p479, !f480

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p482, !f483

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p497, !f498

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW 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 M11

Next: p597, !f598

DHW ISOLATING VALVE

Next: p7, !f8

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p601, !f602

PUMP LIMPET TEST

Next: p608, !f609

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p615, !f616

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p642, !f643

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p646, !f647

SYSTEM PRESSURE

Next: !p653, !f655

FAN VOLTAGE FROM PCB

GAIN ACCESS TO PCB, USE INSULATION MAT AS REQUIRED

Next: !p712, f820

DHW MODULATION

LOOSEN THE OUTLET TE

Next: p728, f719

DHW MODULATION VOLTAGE

SET FLOW RATE AT TAP TO APPROXIMATELY 5 L/MIN

Next: !p720, f721

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: p722, !f723

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p726, !f727

BURNER INJECTOR CONDITION

REMOVE GAS RAIL FROM BOILER FOR INSPECTION

Next: !p732, !f733

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: p758, !f759

PRESSURE APS SWITCHING AT APS

REMOVE PLASTIC COVER FROM THE PCB
REMOVE AIR PRESSURE SWITCH CONNECTOR FROM M3 ON THE PCB

Next: !p783, !f784

ELECTRODE LEAD INSPECTION

DISCONNECT ELECTRODE LEAD FROM PCB AND ELECTRODE

Next: p787, !f788

LOW WATER PRESSURE SWITCH MADE

LOCATE AND REMOVE CONNECTOR M12 FROM THE PCB

Next: p832, f843

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p835, !f836

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: !p839, !f840

SYSTEM PRESSURE

Next: !p844, !f845

OVERHEAT THERMOSTAT RESISTANCE

REMOVE BOTH WIRES FROM THE OVERHEAT THERMOSTAT
ENSURE APPLIANCE IS COOL

Next: p855, !f847

PUMP VOLTAGE

USE INSULATION MAT AS REQUIRED

Next: !p995, f996

ON/OFF SWITCH VOLTAGE (INPUT)

Next: p997, !f998

LOW WATER PRESSURE SWITCH MADE

LOCATE AND REMOVE CONNECTOR M12 FROM THE PCB

Next: p1003, f1004

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: p1007, f1008

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: p1011, f1012

DIVERTER VALVE MICROSWITCH (RESISTANCE)

DISCONNECT PLUG CONN

Next: p1015, !f1016

OBSERVATION DHW MICROSWITCH DISCONNECTED

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

Next: !p1017, !f1018

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p713, !f105

SUMMER/WINTER SWITCH RESISTANCE

REMOVE 1 CONNECTOR F

Next: p1040, !f1041

VOLTAGE EXTERNAL PROGRAMMER

REMOVE CONTROL BOX COVER

Next: p1042, ?1044, ?1046

VOLTAGE ROOM STAT

REMOVE CONTROL BOX COVER

Next: p1048, ?1049, ?1051

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: p1053, f1054

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p1057, !f1058

GAS INLET PRESSURE

ATTACH U-GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p1070, !f1071

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: p1066, !f1067

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p1068, !f1069

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p1072, !f1073

RESISTANCE FAN AND HARNESS

DISCONNECT CONNECTOR M4 FROM THE PCB

Next: p1080, f1081

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: p1122, !f1085

BURNER CONDITION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p456, !f1136

SPARK ELECTRODE FITTING AND CONDITION

Next: p1097, !f1109

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: p119, !f1116

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: p472, !f1121

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: p1110, f481

RESISTANCE GAS VALVE MAIN SOLENOID

REMOVE THE PLUG FROM THE GAS VALVE

Next: !p1123, !f1124

INSPECTION DIVERTER MOVEMENT

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

Next: !p1126, !f1127

GAS VALVE VOLTAGE

REMOVE PLASTIC COVER FROM THE PCB
USE INSULATION MAT AS REQUIRED

Next: p1132, !f1133

GAS VALVE SOLENOID RESISTANCE

REMOVE THE PLUG FROM THE GAS VALVE

Next: !p1134, !f1135

RESISTANCE CH CONTROLS

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

Next: p1138, !f1139

VOLTAGE ROOM STAT

REMOVE CONTROL BOX COVER

Next: p1140, ?1142, ?1144

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: !p488, f718

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: p1146, f1147

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p1150, !f1151

GAS RATE

Next: !p121, f731

DIVERTER VALVE CH POSITION

Next: p589, !f165

DIVERTER VALVE CH POSITION

Next: p606, !f159

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p176, !f177

ON/OFF SWITCH VOLTAGE (OUTPUT)

Next: p197, !f184

FUSE F1 RESISTANCE

REMOVE CONTROL BOX COVER
REMOVE FUSE F1 FROM PCB

Next: p638, f1092

FAN FREE TO SPIN

Next: !p220, !f637

SPARKING AT ELECTRODE

Next: p455, f351

FAN VOLTAGE

Next: p219, f687

GAS PRESSURE ON IGNITION (BURNER)

ON/OFF SWITCH IN ON

Next: p626, f417

GAS INLET PRESSURE

ATTACH U-GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p400, !f401

FLAME SENSE ELECTRODE AND LEAD

DISCONNECT FLAME SENSOR LEAD FROM ELECTRODE AND PCB.

Next: p402, ?404, ?406

FLUE CHECK

Next: p410, !f409

INSPECTION FLUE VENTURI

Next: p43, !f44

CASE FITTED CORRECTLY

Next: !p412, !f411

GAS VALVE MODULATION VOLTAGE (IGNITION)

Next: p419, !f423

GAS VALVE MODULATION RESISTANCE

DISCONNECT VIOLET LEADS FROM THE MODULATING SOLENOID

Next: !p715, !f422

FLUE CHECK

Next: !p45, !f46

GAS PRESSURE ON IGNITION (BURNER)

ON/OFF SWITCH IN ON

Next: p1103, f1129

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: p471, f478

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: p1117, f473

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p476, !f477

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: !p495, f496

GAS VALVE MODULATION VOLTAGE

Next: p98, f757

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: p568, !f569

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: !p570, f571

DIFFERENTIAL TEMPERATURE (HEATING)

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES

Next: p592, f590

HEAT EXCHANGER INSPECTION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: p399, !f395

GAS PRESSURE - CH

ATTACH U-GAUGE TO GAS VALVE OUTLET PRESSURE TEST POINT

Next: p593, f594

SYSTEM BYPASS

Next: !p603, !f604

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: !p599, f600

DIFFERENTIAL TEMPERATURE (HEATING)

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES

Next: p612, f607

SYSTEM BYPASS

Next: !p610, !f611

CH POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: p613, !f618

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: !p617, f614

BURNER INJECTOR CONDITION

REMOVE GAS RAIL FROM BOILER FOR INSPECTION

Next: p631, !f628

BURNER CONDITION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: p633, !f632

HEAT EXCHANGER INSPECTION

REMOVE THE BURNER ASSEMBLY FROM THE BOILER

Next: !p634, !f635

LOW WATER PRESSURE SWITCH MADE

LOCATE AND REMOVE CONNECTOR M12 FROM THE PCB

Next: p639, f652

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: p640, f641

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: p644, f645

DIVERTER VALVE MICROSWITCH (RESISTANCE)

DISCONNECT PLUG CONN

Next: p648, !f649

OBSERVATION DHW MICROSWITCH DISCONNECTED

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

Next: p1125, !f756

FLOW BLOCKAGE OR DAMAGE

BOILERS DHW CIRCUIT FULLY DRAINED AND DISCHARGED

Next: !p9, ?11, ?13

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: !p724, f725

PUMP LIMPET TEST

Next: !p729, !f730

RESISTANCE DHW SENSOR

DISCONNECT PLUG FROM DHW SENSOR (PURPLE AND GREY LEADS)

Next: p760, !f761

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p762, !f763

PRESSURE APS SWITCHING AT PCB

REMOVE PLASTIC COVER FROM THE PCB
REMOVE AIR PRESSURE SWITCH CONNECTOR FROM M3 ON THE PCB

Next: p781, f782

OBSERVATION SPARKING APS PROVED

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

Next: p785, f786

CASE FITTED CORRECTLY

Next: p791, !f792

SPARK ELECTRODE FITTING AND CONDITION

Next: !p799, !f790

AIR PRESSURE SWITCH TUBES

Next: p793, !f794

INSPECTION FLUE VENTURI

Next: p795, !f796

FLUE CHECK

Next: !p797, !f798

RESISTANCE HARNESS AND FLOW SENSOR

DISCONNECT SENSOR PLUG FROM THE PCB

Next: p833, f834

RESISTANCE HARNESS AND DHW SENSOR

DISCONNECT M12 PLUG FROM THE PCB

Next: p837, f838

DHW POTENTIOMETER RESISTANCE

REMOVE CONTROL BOX COVER
DISCONNECT PLUG MARKED M11

Next: !p841, !f842

OBSERVATION BOILER RESET

Next: p950, !f857

DHW PUMP RUNS

REMOVE THE VENT PLUG FROM THE PUMP

Next: p951, f994

PUMP LIMPET

Next: p952, !f953

PRESSURE BURNER MAX AND MIN

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

Next: p954, f1061

DIFFERENTIAL TEMPERATURE (HEATING)

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES

Next: p962, ?964, ?966

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: p982, !f1074

DIFFERENTIAL TEMPERATURE (PLATE HEX)

Next: !p1060, !f1075

GAS INLET PRESSURE

ATTACH U-GAUGE TO GAS VALVE INLET PRESSURE TEST POINT

Next: p102, !f103

OBSERVATION RUN BOILER UP TO TEMPERATURE

ATTACH A TEMPERATURE CLAMP/PROBE TO THE FLOW PIPE (JUST ABOVE THE OVERHEAT STAT)

Next: p984, ?986, ?988

CH PUMP OVERRUNS

Next: !p992, !f993

RESISTANCE FLOW SENSOR

DISCONNECT PLUG FROM CH SENSOR (YELLOW LEADS)

Next: !p990, !f991

ON/OFF SWITCH VOLTAGE (OUTPUT)

Next: p999, !f1000

FUSE F1 RESISTANCE

REMOVE CONTROL BOX COVER
REMOVE FUSE F1 FROM PCB

Next: p1001, !f1002

System Information

  • Total Tests: 389
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control