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:

WORCESTER 9.24 BF (A BOARD)

G.C. NUMBER 47 311 0

Next: &21, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CH SATISFIED

BOILER OPERATING SWITCH IN HW AND CH POSITION
BOILER THERMOSTAT CALLING

Next: &nff, f118

DHW MODULATION

{ISOLATEMAINSPOWER}<

Next: &1, f113

PUMP OVERRUN

BOILER OPERATING SWITCH IN HW AND CH POSITION
HEATING CONTROL THERMOSTAT ADJUSTED TO MAXIMUM

Next: &2, !f112

CH WATER PRESSURE RISE

BOILER OPERATING SWITCH IN HW AND CH POSITION
HEATING CONTROL THERMOSTAT ADJUSTED TO MAXIMUM

Next: &3, !f111

CENTRAL HEATING

BOILER OPERATING SWITCH IN HW AND CH POSITION
HEATING CONTROL THERMOSTAT ADJUSTED TO MAXIMUM

Next: &4, ?104, ?106, ?108

HOT WATER

BOILER OPERATING SWITCH IN HW POSITION

Next: &5, ?90, ?92, ?94

CH BURNER (HIGH FLAME)

{ISOLATEMAINSPOWER}<

Next: &6, !f89

CH BURNER IGNITES

BOILER OPERATING SWITCH IN HW AND CH POSITION

Next: &7, f84

CH PUMP RUNS

BOILER OPERATING SWITCH IN HW AND CH POSITION

Next: &8, f81

DHW BURNER (HIGH FLAME)

{ISOLATEMAINSPOWER}<

Next: &9, f74

DHW BURNER IGNITES

{ISOLATEMAINSPOWER}<

Next: &10, ?58, ?60

DHW PUMP RUNS

BOILER OPERATING SWITCH IN HW POSITION

Next: &11, f49

DHW DEMAND

{ISOLATEMAINSPOWER}
BOILER OPERATING SWITCH IN HW POSITION

Next: &12, !f48

DHW FLOW RATE

Next: &13, f43

FLAME FAILURE

{ISOLATEMAINSPOWER}
IGNITE AND ESTABLISH PILOT

Next: &14, !f42

PILOT ESTABLISHED

{ISOLATEMAINSPOWER}

Next: &15, f35

PILOT IGNITES

{ISOLATEMAINSPOWER}

Next: &16, f30

PILOT SPARKING

{ISOLATEMAINSPOWER}

Next: &17, f25

FLUE

Next: &18, !f24

SYSTEM CHECKS

{ISOLATEMAINSPOWER}

Next: &19, !f23

WORCESTER 9.24 BF (A BOARD)

{ISOLATEMAINSPOWER}<

Next: &20, !f22

CH WATER PRESSURE RISE

EXPANSION VESSEL

Next: End

PUMP OVERRUN

PUMP OVERRUN THERMOSTAT

Next: End

DHW MODULATION

DHW SENSOR

Next: End

CH SATISFIED

CH THERMOSTAT

Next: End

PILOT SPARKING

SPARK ELECTRODE LEAD

Next: End

PILOT SPARKING

SPARK ELECTRODE

Next: End

ELECTRICAL CHECKS

ELECTRICAL CHECKS

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

FLUE

FLUE

Next: End

PILOT IGNITES

GAS VALVE PILOT ADJUSTER

Next: End

PILOT IGNITES

PILOT INJECTOR

Next: End

PILOT ESTABLISHED

INTERRUPTER CONNECTION

Next: End

PILOT ESTABLISHED

HIGH LIMIT THERMOSTAT

Next: End

FLAME FAILURE

MAIN GAS VALVE

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR

Next: End

DHW DEMAND

DIVERTER VALVE

Next: End

DHW PUMP RUNS

Next: End

DHW PUMP RUNS

DIVERTER VALVE MICROSWITCH

Next: End

DHW BURNER IGNITES

TRANSFORMER

Next: End

DHW BURNER IGNITES

DHW SENSOR

Next: End

DHW BURNER IGNITES

MAIN GAS VALVE (GAS VALVE SOLENOID)

Next: End

DHW BURNER IGNITES

MAIN GAS VALVE

Next: End

DHW BURNER (HIGH FLAME)

DHW SENSOR

Next: End

DHW BURNER (HIGH FLAME)

MAIN GAS VALVE (MODUREG SOLENOID)

Next: End

CH PUMP RUNS

OPERATING SWITCH

Next: End

CH BURNER IGNITES

CH THERMOSTAT

Next: End

CH BURNER (HIGH FLAME)

ELECTRONIC DRIVER BOARD

Next: End

HOT WATER

PRIMARY HEAT EXCHANGER

Next: End

CH NOISY OPERATION, DHW QUIET OPERATION

SECONDARY HEAT EXCHANGER

Next: End

RADIATORS DO NOT HEAT, BOILER QUIET OPERATION

Next: End

CENTRAL HEATING

CH THERMOSTAT

Next: End

CH NOISY OPERATION, DHW QUIET OPERATION

Next: End

DHW MODULATION

MAIN GAS VALVE (MODUREG)

Next: End

DHW MODULATION

ELECTRONIC DRIVER BOARD

Next: End

CH SATISFIED

MAIN GAS VALVE

Next: End

PILOT SPARKING

SPARK GENERATOR

Next: End

PILOT IGNITES

MAIN GAS VALVE

Next: End

PILOT ESTABLISHED

THERMOCOUPLE

Next: End

PILOT ESTABLISHED

MAIN GAS VALVE

Next: End

DHW FLOW RATE

SECONDARY HEAT EXCHANGER

Next: End

DHW PUMP RUNS

OPERATING SWITCH

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

PUMP OVERRUN THERMOSTAT

Next: End

DHW BURNER IGNITES

MAIN GAS VALVE (MODUREG)

Next: End

DHW BURNER IGNITES

DIVERTER VALVE MICROSWITCH

Next: End

DHW BURNER IGNITES

ELECTRONIC DRIVER BOARD

Next: End

DHW BURNER IGNITES

BURNER INJECTOR

Next: End

DHW BURNER (HIGH FLAME)

ELECTRONIC DRIVER BOARD

Next: End

DHW BURNER (HIGH FLAME)

MAIN GAS VALVE (MODUREG)

Next: End

CH PUMP RUNS

Next: End

CH BURNER IGNITES

ELECTRONIC DRIVER BOARD

Next: End

CH BURNER IGNITES

DIVERTER VALVE MICROSWITCH

Next: End

DHW QUIET OPERATION, RADIATORS COLD

SECONDARY HEAT EXCHANGER

Next: End

HOT WATER

DIVERTER VALVE

Next: End

CENTRAL HEATING

SECONDARY HEAT EXCHANGER

Next: End

RADIATORS DO NOT HEAT, BOILER QUIET OPERATION

SECONDARY HEAT EXCHANGER

Next: End

CH NOISY OPERATION, DHW NOISY OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p101

CH NOISY OPERATION, DHW QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p103

RADIATORS DO NOT HEAT, BOILER QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p105

CH NOISY OPERATION, DHW NOISY OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p107

CH NOISY OPERATION, DHW QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p110

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: p59

BURNER IGNITES BUT WITH HIGH FLAME

CHARACTERISTIC TEST FROM DHW BURNER IGNITES

Next: !p61

DHW NOISY OPERATION

CHARACTERISTIC TEST FROM HOT WATER

Next: p91

DHW QUIET OPERATION, RADIATORS COLD

CHARACTERISTIC TEST FROM HOT WATER

Next: !p93

DHW QUIET OPERATION, RADIATORS WARM

CHARACTERISTIC TEST FROM HOT WATER

Next: !p95

RADIATORS DO NOT HEAT, BOILER QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p99

31/01/2018 08:18:25 1809_1_50_1 31/01/2018 10:10:28

31/01/2018 08:29:43

Next: End

DHW MODULATION: MODUREG VOLTAGE

BOILER OPERATING SWITCH IN HW POSITION

Next: !p115, f114

DHW SENSOR (MODULATION FUNCTION)

Next: !p117, !f116

CH THERMOSTAT (SATISFIED)

{ISOLATEMAINSPOWER}<

Next: !p120, !f119

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}
REMOVE THE ELECTRODE LEAD FROM THE ELECTRODE AND SPARK GENERATOR

Next: p27, !f121

PILOT ADJUSTER

{ISOLATEMAINSPOWER}

Next: p32, !f31

PILOT GAS VALVE MILLIVOLTAGE

{ISOLATEMAINSPOWER}

Next: p37, f36

PILOT INTERRUPTER

{ISOLATEMAINSPOWER}

Next: !p39, !f38

DHW INLET FILTER

{ISOLATEMAINSPOWER}
MAINS WATER OFF

Next: p45, !f44

OPERATING SWITCH VOLTAGE (DHW)

{ISOLATEMAINSPOWER}<

Next: p51, f50

MAINS POWER SUPPLY

Next: !p53, !f52

DHW PUMP THERMOSTAT N.C. VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p57, !f56

DEMAND VOLTAGE (DHW)

{ISOLATEMAINSPOWER}<

Next: p65, f64

TRANSFORMER OUTPUT VOLTAGE

BOILER OPERATING SWITCH IN HW POSITION

Next: !p67, !f66

DHW MODUREG FULL VOLTAGE

BOILER OPERATING SWITCH IN HW POSITION
ENSURE DHW IS COOL

Next: p76, f75

DHW SENSOR (HIGH FLAME FUNCTION)

{ISOLATEMAINSPOWER}<

Next: !p78, !f77

OPERATING SWITCH VOLTAGE (CH)

{ISOLATEMAINSPOWER}<

Next: !p83, !f82

DEMAND VOLTAGE (CH)

BOILER OPERATING SWITCH IN HW AND CH POSITION
HEATING CONTROL THERMOSTAT ADJUSTED TO MAXIMUM

Next: !p86, f85

CH THERMOSTAT (CALLING)

{ISOLATEMAINSPOWER}<

Next: !p88, !f87

ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p123, !f124

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: !p34, !f33

HIGH LIMIT THERMOSTAT

{ISOLATEMAINSPOWER}

Next: !p41, !f40

DHW FLOW RESTRICTOR

{ISOLATEMAINSPOWER}
MAINS WATER OFF

Next: !p47, !f46

DHW PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p55, f54

DHW GAS VALVE VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p63, f62

GAS VALVE SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE TWO PINK WIRES FROM THE GAS VALVE MAIN SOLENOID

Next: p71, !f70

DHW SENSOR (IGNITES FUNCTION)

{ISOLATEMAINSPOWER}<

Next: !p69, !f68

DHW BURNER GAS PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p73, !f72

MODUREG SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE YELLOW WIRES FROM MODUREG SOLENOID

Next: !p80, !f79

CENTRAL HEATING

BOILER OPERATING SWITCH IN HW AND CH POSITION
HEATING CONTROL THERMOSTAT ADJUSTED TO MAXIMUM

Next: !p97, ?98, ?100, ?102

System Information

  • Total Tests: 121
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control