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:

GLOW-WORM MICRON 120FF

WARNING - IMPORTA

Next: &1, *

NO FAULT FOUND

Next: nff

GLOW-WORM MICRON 120FF

{ISOLATEMAINSPOWER}<

Next: &677, !f10

FAN RUNS CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: &678, ?682, ?684

IGNITION FIRST STAGE CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: &679, ?718, ?720, ?722, ?724, ?730

MAIN BURNER IGNITES AND STABILISES CH DEMAND

Next: &864, ?796, ?798, ?800, ?802

DHW OPERATION

EXTERNAL CONTROLS CALLING FOR HEAT

Next: &979, ?875, ?877, ?879, ?881, ?883, ?893

CH OPERATION

EXTERNAL CONTROLS CALLING FOR HEAT

Next: &899, ?865, ?867, ?869, ?871, ?895

SYSTEM PRESSURE RISE

NOTE
T

Next: &863, !f900

PUMP OVERRUN

EXTERNAL CONTROLS CALLING FOR HEAT

Next: &nff, !f1041

ELECTRICAL CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

FAULT 6

GAS INLET PRESSURE

Next: End

FAULT 4

BURNER INJECTOR

Next: End

FUNCTION PUMP VOLTS 6

PCB

Next: End

FAULT 13

PUMP

Next: End

FAULT 6

Next: End

FAULT 6

THERMOSTAT

Next: End

FUNCTION FAN CONTROL 4

PCB

Next: End

BLOWN 1

FUSE F1

Next: End

FAULT 1

Next: End

FUNCTION OVERRUN

PCB

Next: End

FAULT 2

PRESSURE SWITCH - WATER C/W O-RING

Next: End

FAULT 3

PRESSURE SWITCH - WATER C/W O-RING

Next: End

FAULT 1

SYSTEM PRESSURE

Next: End

BLOWN 1

FUSE - MAINS POWER SUPPLY

Next: End

FAULT 1

TUBE - SILICONE

Next: End

FAULT 1

FAN ASSEMBLY (VENTURI)

Next: End

FUNCTION FAN

PCB

Next: End

FAULT 1

FLUE

Next: End

FAULT 1

THERMOSTAT

Next: End

FUSE F2

FUSE F2

Next: End

FUNCTION GV VOLTS 1

PCB

Next: End

FAULT 1

PIPE C/W NUTS - PILOT

Next: End

FUNCTION GV 1 VOLTS 1

PCB

Next: End

FAULT 1

DOUBLE SOLENOID

Next: End

FAULT 1

PILOT INJECTOR

Next: End

FAULT 1

SPARK ELECTRODE C/W LEAD

Next: End

FAULT 2

DOUBLE SOLENOID

Next: End

FAULT 1

IGNITION ELECTRODE GAP

Next: End

FAULT 2

PILOT INJECTOR

Next: End

FAULT 2

PIPE C/W NUTS - PILOT

Next: End

FAULT 1

GAS INLET PRESSURE

Next: End

FAULT 2

TUBE - SILICONE

Next: End

FAULT 2

FAN ASSEMBLY (VENTURI)

Next: End

FAULT 2

FLUE

Next: End

FAULT 2

SPARK ELECTRODE C/W LEAD

Next: End

FAULT 2

GAS INLET PRESSURE

Next: End

FUNCTION FAN CONTROL 2

PCB

Next: End

FAULT 3

TUBE - SILICONE

Next: End

FAULT 3

FAN ASSEMBLY (VENTURI)

Next: End

FAULT 3

FLUE

Next: End

FLUE WAYS FAULT 1

HEAT EXCHANGER FLUE WAYS

Next: End

FAULT 3

PILOT INJECTOR

Next: End

FAULT 3

PIPE C/W NUTS - PILOT

Next: End

FUNCTION GV VOLTS 2

PCB

Next: End

FAULT 3

DOUBLE SOLENOID

Next: End

FAULT 3

GAS INLET PRESSURE

Next: End

FUNCTION FAN CONTROL 1

PCB

Next: End

FAULT 4

TUBE - SILICONE

Next: End

FAULT 4

FAN ASSEMBLY (VENTURI)

Next: End

FAULT 4

FLUE

Next: End

FAULT 2

THERMOSTAT

Next: End

FAULT 4

GAS INLET PRESSURE

Next: End

FLUE WAYS FAULT 2

HEAT EXCHANGER FLUE WAYS

Next: End

FAULT 1

GAS VALVE PRESSURE ADJUSTMENT

Next: End

FAULT 1

EXPANSION VESSEL

Next: End

FAULT 2

PUMP

Next: End

FAULT 1

Next: End

FAULT 2

GAS VALVE PRESSURE ADJUSTMENT

Next: End

FAULT 1

BURNER INJECTOR

Next: End

FAULT 3

PUMP

Next: End

FAULT 2

Next: End

FUNCTION PUMP VOLTS 2

PCB

Next: End

FUNCTION PUMP VOLTS 1

PCB

Next: End

FAULT 3

SPARK ELECTRODE C/W LEAD

Next: End

FAULT 3

THERMOSTAT

Next: End

FAULT 5

GAS INLET PRESSURE

Next: End

FAULT 2

BURNER INJECTOR

Next: End

FAULT 6

PUMP

Next: End

FAULT 3

Next: End

FAULT 4

THERMOSTAT

Next: End

FUNCTION PUMP VOLTS 3

PCB

Next: End

FUNCTION FAN CONTROL 3

PCB

Next: End

FUNCTION PUMP VOLTS 4

PCB

Next: End

FAULT 8

PUMP

Next: End

FAULT 4

Next: End

FAULT4

GAS VALVE PRESSURE ADJUSTMENT

Next: End

FAULT 3

BURNER INJECTOR

Next: End

FUNCTION PUMP VOLTS 5

PCB

Next: End

FAULT 11

PUMP

Next: End

FAULT 5

Next: End

FAULT 5

THERMOSTAT

Next: End

FAULT 2 BAFFLES

HEAT EXCHANGER - EFFICIENCY

Next: End

FAULT 12

PUMP

Next: End

FAULT 6

Next: End

FAULT 3

THERMOSTAT C/W HEATSINK - OVERHEAT CUT-OFF

Next: End

FAULT 7

Next: End

FAULT 3

FAN ASSEMBLY

Next: End

FUNCTION 1 INPUT

PCB

Next: End

FAULT 1

Next: End

FAULT 2

Next: End

FAULT 1

FAN ASSEMBLY

Next: End

FAULT 1

Next: End

FAULT 1

THERMOSTAT C/W HEATSINK - OVERHEAT CUT-OFF

Next: End

FAULT 1

FAN HARNESS ASSEMBLY

Next: End

FAULT 1 N/C

PRESSURE SWITCH - AIR - SPECIAL

Next: End

FUNCTION OUTPUT

PCB

Next: End

FAULT 1

PRESSURE SWITCH - WATER C/W O-RING

Next: End

FUNCTION FAN RELAY

PCB

Next: End

FUNCTION FSD 1

PCB

Next: End

FAULT 1

BURNER - PILOT

Next: End

FAULT 1

GAS VALVE ASSEMBLY

Next: End

FAULT 2

GAS VALVE ASSEMBLY

Next: End

FAULT 1 N/O

PRESSURE SWITCH - AIR - SPECIAL

Next: End

FUNCTION SPK GEN

PCB

Next: End

FAULT 2 N/O

PRESSURE SWITCH - AIR - SPECIAL

Next: End

FUNCTION PILOT FAIL

PCB

Next: End

FAULT 2

BURNER - PILOT

Next: End

FAULT 3

GAS VALVE ASSEMBLY

Next: End

FAULT 3 N/O

PRESSURE SWITCH - AIR - SPECIAL

Next: End

FUNCTION PILOT

PCB

Next: End

FAULT 5

FLUE

Next: End

FAULT 3

Next: End

FAULT 4

Next: End

KETTLING 1

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT 1

Next: End

FAULT 4

PUMP

Next: End

FAULT 1

PUMP

Next: End

FUNCTION FSD 2

PCB

Next: End

FAULT 3

GAS VALVE PRESSURE ADJUSTMENT

Next: End

FAULT 1 BAFFLES

HEAT EXCHANGER - EFFICIENCY

Next: End

FAULT 2

Next: End

FAULT 2

THERMOSTAT C/W HEATSINK - OVERHEAT CUT-OFF

Next: End

FAULT 5

PUMP

Next: End

FAULT 2

FAN ASSEMBLY

Next: End

FAULT 3

Next: End

FAULT 7

PUMP

Next: End

KETTLING 2

HEAT EXCHANGER ASSEMBLY

Next: End

FAULT 10

PUMP

Next: End

FAULT 5

Next: End

FAULT 5

GAS VALVE PRESSURE ADJUSTMENT

Next: End

Fan does not run

CHARACTERISTIC TEST FROM FAN RUNS CH DEMAND

Next: p683

Fan cycles - speeds up then slows

CHARACTERISTIC TEST FROM FAN RUNS CH DEMAND

Next: p685

Pilot lights, sparking continues and no main gas

CHARACTERISTIC TEST FROM IGNITION FIRST STAGE CH

Next: p719

Pilot lights, sparking ceases and no main gas

CHARACTERISTIC TEST FROM IGNITION FIRST STAGE CH

Next: p721

Pilot does not light, sparking present at electrode tip

CHARACTERISTIC TEST FROM IGNITION FIRST STAGE CH

Next: p741

No sparking present at electrode tip

CHARACTERISTIC TEST FROM IGNITION FIRST STAGE CH

Next: p725

Pilot ignites, sparking ceases and pilot flame dies away

CHARACTERISTIC TEST FROM IGNITION FIRST STAGE CH

Next: p731

Pilot only - no main burner, sparking continues

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES AND STABALISES CH

Next: p804

Main burner lights but dies away

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES AND STABALISES CH

Next: p818

Main burner ignites but baffles out or lifts off

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES AND STABALISES CH

Next: p801

Pilot only - no main burner, sparking ceases

CHARACTERISTIC TEST FROM MAIN BURNER IGNITES AND STABALISES CH

Next: p813

Boiler kettling

CHARACTERISTIC TEST FROM CH OPERATION

Next: p866

Boiler to temperature, radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p916

Boiler cool, radiators cool

CHARACTERISTIC TEST FROM CH OPERATION

Next: p870

Boiler shuts down prematurely

CHARACTERISTIC TEST FROM CH OPERATION

Next: p943

Boiler kettling

CHARACTERISTIC TEST FROM CH OPERATION

Next: p966

Boiler to temperature, DHW cool

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p980

Boiler cool, DHW cool

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p994

Boiler shuts down prematurely

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1012

Boiler does not react to DHW demand

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p1040

Boiler only heats when CH is calling

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p894

Boiler only heats when DHW is calling

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p896

15/12/2017 09:47:40 1711_1_50_1 09/01/2018 08:31:06

21/12/2017 09:24:04

Next: End

PUMP RUNS DHW DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p1014, f1015

VOLTAGE TO PUMP DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: !p1016, !f1017

VOLTAGE TO K1

{ISOLATEMAINSPOWER}<

Next: !p1025, !f1043

FAN VOLTAGE DHW DEMAND

Next: !p1031, !f1032

EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: !p1038, !f1039

VOLTAGE AT K2

{ISOLATEMAINSPOWER}<

Next: p688, f689

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB
USE INSULATION MAT WHERE NECESSARY

Next: p1033, f691

MAINS POWER SUPPLY FUSE

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE APPLIANCE MAINS POWER SUPPLY I.E. FUSED SPUR

Next: !p694, !f695

VOLTAGE TO K1

{ISOLATEMAINSPOWER}<

Next: !p698, f699

SYSTEM PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p714, !f1044

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: !p712, !f713

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p704, !f705

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: p738, !f758

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p774, !f775

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p788, !f789

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: p807, !f808

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p846, !f847

VOLTAGE TO PUMP CH DEMAND

{ISOLATEMAINSPOWER}<

Next: !p926, !f925

VOLTAGE TO PUMP CH DEMAND

{ISOLATEMAINSPOWER}<

Next: !p923, !f924

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p933, !f934

PUMP RUNS CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p946, f947

VOLTAGE TO PUMP CH DEMAND

{ISOLATEMAINSPOWER}<

Next: !p958, !f959

VOLTAGE TO K1

{ISOLATEMAINSPOWER}<

Next: !p956, !f1042

FAN VOLTAGE CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p962, !f964

VOLTAGE TO PUMP DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: !p969, !f970

VOLTAGE TO PUMP DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: !p983, !f984

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p999, !f1000

SYSTEM TEMPERATURE

{ISOLATEMAINSPOWER}

Next: p1022, f1013

PUMP LIMPET TEST DHW DEMAND

Next: p1018, !f1019

EXTERNAL BYPASS

Next: !p1020, !f1021

BOILER CONTROL THERMOSTAT INPUT VOLTAGE DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: p1023, f1024

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: p1027, !f1028

FAN SPEED DHW DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p1029, f1030

VOLTAGE SWITCHED LIVE

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB
USE INSULATION MAT AS NECESSARY

Next: p1035, f1034

FUSE F1

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE PCB

Next: !p1036, !f1037

FAN VOLTAGE CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p686, f687

FUSE F2

{ISOLATEMAINSPOWER}
REMOVE THE FUSE F2 FROM THE PCB.

Next: !p716, !f717

BOILER CONTROL THERMOSTAT INPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p696, f697

AIR PRESSURE SWITCH N/C

{ISOLATEMAINSPOWER}<

Next: p700, f701

AIR PRESSURE SWITCH VOLTAGE (COMMON)

{ISOLATEMAINSPOWER}<

Next: p702, f703

PCB FAN CONNECTOR VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p708, !f709

POSITIVE AND NEGATIVE FAN CONNECTIONS

{ISOLATEMAINSPOWER}

Next: p706, !f707

FLUE

Next: !p710, !f711

PILOT FLAME PICTURE

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p726, f727

GAS VALVE EV2 VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p734, !f735

AIR PRESSURE SWITCH PROVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p772, f773

IGNITION LEAD AND ELECTRODE ASSEMBLY

{ISOLATEMAINSPOWER}<

Next: !p732, !f759

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p782, !f783

GAS VALVE EV2 RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE CONNECTOR PLUG FROM THE GAS VALVE

Next: !p756, !f757

PILOT PIPE

{ISOLATEMAINSPOWER}

Next: !p739, !f740

GAS VALVE EV1 VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p761, !f743

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p762, !f771

GAS VALVE EV1 RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE CONNECTOR PLUG FROM THE GAS VALVE

Next: p763, !f764

IGNITION ELECTRODE AND GAP

{ISOLATEMAINSPOWER}

Next: p765, !f766

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: p767, !f768

PILOT PIPE

{ISOLATEMAINSPOWER}

Next: !p769, !f770

IGNITION LEAD AND ELECTRODE ASSEMBLY

{ISOLATEMAINSPOWER}<

Next: !p780, !f781

POSITIVE AND NEGATIVE FAN CONNECTIONS

{ISOLATEMAINSPOWER}

Next: p776, !f777

FLUE

Next: !p778, !f779

FAN RUNS AT HIGH SPEED

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p784, !f785

AIR PRESSURE SWITCH PROVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p786, f787

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: !p794, !f795

POSITIVE AND NEGATIVE FAN CONNECTIONS

{ISOLATEMAINSPOWER}

Next: p790, !f791

FLUE

Next: !p792, !f793

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p854, !f855

PILOT FLAME PICTURE

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p805, f806

IGNITION LEAD AND ELECTRODE ASSEMBLY

{ISOLATEMAINSPOWER}<

Next: !p927, !f928

PILOT PIPE

{ISOLATEMAINSPOWER}

Next: !p809, !f810

GAS VALVE EV2 VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p814, !f815

GAS VALVE EV2 RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE CONNECTOR PLUG FROM THE GAS VALVE

Next: !p816, !f817

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p819, !f820

FAN RUNS AT HIGH SPEED

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p840, !f822

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p844, !f853

AIR PRESSURE SWITCH PROVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p852, f845

POSITIVE AND NEGATIVE FAN CONNECTIONS

{ISOLATEMAINSPOWER}

Next: p848, !f849

FLUE

Next: !p850, !f851

BURNER PRESSURE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p856, !f859

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: !p860, !f858

PUMP RUNS CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p901, f902

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p929, !f930

PUMP LIMPET TEST CH DEMAND

Next: p903, !f904

EXTERNAL BYPASS

Next: p911, !f908

BURNER PRESSURE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p912, !f913

GAS RATE CH DEMAND

Next: !p914, !f915

PUMP RUNS CH DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p917, f918

PUMP LIMPET TEST CH DEMAND

Next: p919, !f920

EXTERNAL BYPASS

Next: !p921, !f922

BURNER PRESSURE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p931, f932

GAS RATE CH DEMAND

Next: !p935, !f936

SYSTEM TEMPERATURE

{ISOLATEMAINSPOWER}

Next: p944, f945

BOILER CONTROL THERMOSTAT INPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p952, f953

PUMP LIMPET TEST CH DEMAND

Next: p948, !f949

EXTERNAL BYPASS

Next: !p950, !f951

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE CH DEMAND

{ISOLATEMAINSPOWER}<

Next: p954, !f955

FAN RUNS AT HIGH SPEED

EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p965, f961

PUMP RUNS DHW DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p967, f968

PUMP LIMPET TEST DHW DEMAND

Next: p971, !f972

EXTERNAL BYPASS

Next: p973, !f974

BURNER PRESSURE DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: p975, !f976

GAS RATE DHW DEMAND

Next: !p977, !f978

PUMP RUNS DHW DEMAND

EXTERNAL CONTROLS CALLING FOR HEAT

Next: p981, f982

PUMP LIMPET TEST DHW DEMAND

Next: p985, !f986

EXTERNAL BYPASS

Next: !p993, !f988

BOILER CONTROL THERMOSTAT OUTPUT VOLTAGE DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: p995, !f996

BURNER PRESSURE DHW DEMAND

{ISOLATEMAINSPOWER}<

Next: p997, f998

GAS RATE DHW DEMAND

Next: !p1001, !f1002

System Information

Total Tests: 270

Sequence Logic: Decoded from encrypted .seq file

Navigation: Dynamic based on pass/fail results

Source: 4731307 GW SWIFTFLOW 100 SIT Control