XSol Diagnostic System

WORCESTER 9.24 BF (B BOARD)

G.C. NUMBER 47 311 0

Next: &21, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CH MODULATION

{ISOLATEMAINSPOWER}<

Next: &nff, f118

DHW MODULATION

{ISOLATEMAINSPOWER}<

Next: &1, f113

PUMP OVERRUN

BOILER OPERATING SWI

Next: &2, !f112

CH WATER PRESSURE RISE

BOILER OPERATING SWI

Next: &3, !f111

CENTRAL HEATING

BOILER OPERATING SWI

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 SWI

Next: &7, f121

CH PUMP RUNS

BOILER OPERATING SWI

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

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 CHECK

{ISOLATEMAINSPOWER}

Next: &19, !f23

WORCESTER 9.24 BF (B 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 MODULATION

CH SENSOR

Next: End

CH BURNER IGNITES

DIVERTER VALVE MICROSWITCH

Next: End

CH BURNER IGNITES

CH SENSOR

Next: End

CH BURNER IGNITES

CH TEMPERATURE POTENTIOMETER

Next: End

PILOT SPARKING

SPARK ELECTRODE LEAD

Next: End

PILOT SPARKING

SPARK ELECTRODE

Next: End

ELECTRICAL CHECKS

Next: End

SYSTEM CHECKS

Next: End

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 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 SENSOR

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 BURNER IGNITES

ELECTRONIC DRIVER BOARD

Next: End

CH MODULATION

CH TEMPERATURE POTENTIOMETER

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

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(1)

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p101

CH NOISY OPERATION, DHW QUIET OPERATION(1)

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p103

RADIATORS DO NOT HEAT, BOILER QUIET OPERATION(2)

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p105

CH NOISY OPERATION, DHW NOISY OPERATION(2)

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p107

CH NOISY OPERATION, DHW QUIET OPERATION(2)

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(1)

CHARACTERISTIC TEST FROM CENTRAL HEATING

Next: !p99

31/01/2018 08:51:54 1801_1_50_1 31/01/2018 10:10:54

19/01/2018 10:20:35

Next: End

DHW MODULATION: MODUREG VOLTAGE

BOILER OPERATING SWITCH IN HW POSITION

Next: !p115, f114

DHW SENSOR RESISTANCE (MODULATION)

Next: !p117, !f116

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE WHITE WIRES FROM THE CH SENSOR

Next: !p128, !f119

DEMAND VOLTAGE (CH)

{ISOLATEMAINSPOWER}<

Next: p123, !f122

SPARK ELECTRODE LEAD

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

Next: p27, !f129

PILOT ADJUSTER

{ISOLATEMAINSPOWER}

Next: p32, !f31

PILOT GAS VALVE MILLIVOLTAGE

{ISOLATEMAINSPOWER}

Next: p37, f36

THERMOCOUPLE INTERRUPTER PAD

{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}
BOILER OPERATING SWITCH IN HW POSITION

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 RESISTANCE (HIGH FLAME)

{ISOLATEMAINSPOWER}<

Next: !p78, !f77

OPERATING SWITCH VOLTAGE (CH)

{ISOLATEMAINSPOWER}<

Next: !p83, !f82

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE WHITE WIRES FROM THE CH SENSOR

Next: p125, !f124

CH TEMPERATURE POTENTIOMETER RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT POTENTIOMETER CONNECTOR FROM PCB (PINK, YELLOW AND VIOLET WIRES)

Next: !p127, !f126

ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p131, !f132

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: !p34, !f33

HIGH LIMIT THERMOSTAT

{ISOLATEMAINSPOWER}
ENSURE BOILER IS COOL

Next: !p41, !f40

DHW FLOW RESTRICTOR

{ISOLATEMAINSPOWER}
MAINS WATER OFF

Next: !p47, !f46

DHW PUMP VOLTAGE

{ISOLATEMAINSPOWER}
BOILER OPERATING SWITCH IN HW POSITION

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 SOLENOID

Next: p71, !f70

DHW SENSOR RESISTANCE (CALLING)

{ISOLATEMAINSPOWER}<

Next: !p69, !f68

DHW BURNER GAS PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p73, !f72

MODUREG SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE YELLOW WIRES FROM MODUREG

Next: !p80, !f79

CENTRAL HEATING

BOILER OPERATING SWI

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

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