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 ELECTRONIC RSF

G.C. NUMBER 47 311 0

Next: &19, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

WATER PRESSURE RISE

BOILER OPERATING SWI

Next: &nff, !f127

CENTRAL HEATING OPERATION

BOILER OPERATING SWI

Next: &1, ?121, ?123, ?135

HOT WATER OPERATION

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &2, ?115, ?117, ?119

PUMP OVERRUN

BOILER OPERATING SWI

Next: &3, !f114

CH BURNER RE-IGNITE DELAY

BOILER OPERATING SWI

Next: &4, !f113

CH BURNER IGNITION AND MODULATION

{ISOLATEMAINSPOWER}<

Next: &5, ?105, ?107

CH DEMAND NEON

BOILER OPERATING SWI

Next: &6, f100

DHW BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &7, f95

DHW BURNER HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &8, f86

DHW BURNER IGNITES

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &9, f77

DHW PILOT IGNITES

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &10, f70

DHW SPARKING

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &11, f59

DHW FAN RUNS

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &12, f44

DHW PUMP RUNS

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &13, f39

DHW DEMAND NEON

TURN HOT WATER TAP ON
BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: &14, f32

STANDBY NEON

BOILER OPERATING SWITCH / PROGRAMMER (1) SET TO WATER ONLY

Next: &15, f27

DHW FLOW RATE

Next: &16, f22

SYSTEM CHECKS

{ISOLATEMAINSPOWER}

Next: &17, !f21

WORCESTER 9.24 ELECTRONIC RSF

{ISOLATEMAINSPOWER}<

Next: &18, !f20

CH DEMAND NEON

SELECTOR SWITCH / PROGRAMMER

Next: End

CH DEMAND NEON

ROOM THERMOSTAT/ CONTROLS

Next: End

CH BURNER MODULATION

CH TEMPERATURE POTENTIOMETER

Next: End

CH BURNER MODULATION

CH SENSOR

Next: End

CH BURNER RE-IGNITE DELAY

MAIN PCB

Next: End

PUMP OVERRUN

PUMP OVERRUN THERMOSTAT

Next: End

WATER PRESSURE RISE

EXPANSION VESSEL

Next: End

DHW SPARKING

SPARK ELECTRODE

Next: End

DHW SPARKING

SPARK ELECTRODE LEAD

Next: End

ELECTRICAL CHECKS

ELECTRICAL CHECKS

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

DHW FLOW RATE

DHW INLET FILTER

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR

Next: End

STANDBY NEON

FUSE F1

Next: End

STANDBY NEON

Next: End

DHW DEMAND NEON

DIVERTER VALVE

Next: End

DHW DEMAND NEON

SELECTOR SWITCH / PROGRAMMER

Next: End

DHW PUMP RUNS

PUMP OVERRUN THERMOSTAT

Next: End

DHW FAN RUNS

FUSE F2

Next: End

DHW FAN RUNS

OVERHEAT THERMOSTAT

Next: End

DHW FAN RUNS

DHW SENSOR

Next: End

DHW FAN RUNS

SEQUENCE CONTROL PCB

Next: End

DHW FAN RUNS

AIR PRESSURE SWITCH

Next: End

DHW SPARKING

AIR PRESSURE SWITCH TUBES

Next: End

DHW SPARKING

FLUE

Next: End

DHW PILOT IGNITES

SEQUENCE CONTROL PCB

Next: End

DHW PILOT IGNITES

PILOT VALVE

Next: End

DHW PILOT IGNITES

PILOT INJECTOR

Next: End

DHW BURNER IGNITES

SPARK ELECTRODE LEAD

Next: End

DHW PILOT IGNITES

MAIN GAS VALVE SOLENOID

Next: End

DHW BURNER HIGH FLAME

DIVERTER VALVE MICROSWITCH

Next: End

DHW BURNER HIGH FLAME

DHW SENSOR

Next: End

DHW BURNER HIGH FLAME

MODUREG SOLENOID

Next: End

DHW BURNER MODULATION

DHW SENSOR

Next: End

DHW BURNER MODULATION

MAIN PCB

Next: End

CH DEMAND NEON

DIVERTER VALVE MICROSWITCH

Next: End

CH BURNER MODULATION

DIVERTER VALVE MICROSWITCH

Next: End

CH BURNER MODULATION

MAIN PCB

Next: End

HW QUIET OPERATION, RADIATORS COLD

SECONDARY HEAT EXCHANGER

Next: End

HOT WATER OPERATION

DIVERTER VALVE

Next: End

CENTRAL HEATING OPERATION

CH SENSOR

Next: End

CENTRAL HEATING OPERATION (1)

Next: End

CENTRAL HEATING OPERATION

SECONDARY HEAT EXCHANGER

Next: End

HOT WATER OPERATION

PRIMARY HEAT EXCHANGER

Next: End

CH NOISY OPERATION, HW QUIET OPERATION

Next: End

CH QUIET OPERATION, RADIATORS COLD

Next: End

CENTRAL HEATING OPERATION (2)

Next: End

DHW SPARKING

SEQUENCE CONTROL PCB

Next: End

DHW FLOW RATE

SECONDARY HEAT EXCHANGER

Next: End

STANDBY NEON

STANDBY NEON

Next: End

DHW DEMAND NEON

DEMAND NEON

Next: End

DHW DEMAND NEON

DIVERTER VALVE MICROSWITCH

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

MAIN PCB

Next: End

DHW FAN RUNS

MAIN PCB

Next: End

DHW FAN RUNS

FAN

Next: End

DHW FAN RUNS

AIR PRESSURE SWITCH TUBES

Next: End

DHW SPARKING

AIR PRESSURE SWITCH

Next: End

DHW PILOT IGNITES

GAS VALVE PILOT ADJUSTER

Next: End

DHW BURNER IGNITES

SEQUENCE CONTROL PCB

Next: End

DHW PILOT IGNITES

BURNER INJECTOR

Next: End

DHW PILOT IGNITES

GAS VALVE

Next: End

DHW BURNER HIGH FLAME

MAIN PCB

Next: End

DHW BURNER HIGH FLAME

MODUREG

Next: End

DHW BURNER MODULATION

MODUREG

Next: End

BURNER GOES TO HIGH FLAME IMMEDIATELY

CHARACTERISTIC TEST FROM CH BURNER MODULATION

Next: !p106

BURNER DOES NOT IGNITE OR DOES NOT RAMP UP OR MODULATE

CHARACTERISTIC TEST FROM CH BURNER MODULATION

Next: p108

HW NOISY OPERATION

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: p116

HW QUIET OPERATION, RADIATORS COLD

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: !p118

HW QUIET OPERATION, RADIATORS WARM

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: !p120

CH NOISY OPERATION, HW PREVIOUSLY NOISY OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p122

CH NOISY OPERATION, HW QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p124

CH NOISY OPERATION, HW PREVIOUSLY NOISY OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p130

CH NOISY OPERATION, HW QUIET OPERATION

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p132

CH QUIET OPERATION, RADIATORS COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p134

CH QUIET OPERATION, RADIATORS COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p136

07/02/2018 13:53:51 1802_1_50_1 06/03/2018 13:34:59

19/02/2018 11:30:36

Next: End

OPERATING SWITCH / PROGRAMMER - CH VOLTAGE

{ISOLATEMAINSPOWER}<

Next: p102, !f101

DHW INLET FILTER

{ISOLATEMAINSPOWER}
WATER OFF

Next: p24, !f23

FUSE F1

{ISOLATEMAINSPOWER}
GAIN ACCESS TO PCB

Next: p29, !f28

DIVERTER VALVE SPINDLE OPERATED

{ISOLATEMAINSPOWER}

Next: p34, !f33

OPERATING SWITCH / PROGRAMMER OUTPUT VOLTAGE (DHW DEMAND)

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: !p38, !f37

DHW PUMP VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p41, f40

PUMP OVERRUN THERMOSTAT VOLTAGE (PUMP RUN)

ENSURE THE BOILER HA

Next: !p43, !f42

OVERHEAT THERMOSTAT VOLTAGE (OUTPUT)

{ISOLATEMAINSPOWER}<

Next: p46, f45

FUSE F2

{ISOLATEMAINSPOWER}

Next: p48, !f47

AIR PRESSURE SWITCH: NO AIR RESISTANCE

{ISOLATEMAINSPOWER}<

Next: !p58, !f57

DHW AIR PRESSURE SWITCH: AIR DETECT

{ISOLATEMAINSPOWER}<

Next: p61, f60

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p63, !f62

PILOT VOLTAGE (DHW DEMAND)

{ISOLATEMAINSPOWER}<

Next: p72, !f71

DHW GAS VALVE VOLTAGE

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: p79, f78

SPARK ELECTRODE LEAD

{ISOLATEMAINSPOWER}

Next: !p81, !f80

MAIN GAS VALVE SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN3 FROM SEQUENCE CONTROL PCB

Next: !p85, !f84

DHW MODUREG FULL VOLTAGE

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: p88, f87

DIVERTER VALVE MICROSWITCH RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR X3 FROM THE MAIN PCB

Next: p90, !f89

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: p97, !f96

ROOM THERMOSTAT/EXTERNAL CONTROLS VOLTAGE

BOILER OPERATING SWITCH / PROGRAMMER SET TO HEATING AND WATER

Next: !p104, !f103

CH POTENTIOMETER RESISTANCE

{ISOLATEMAINSPOWER}<

Next: p110, !f109

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}<

Next: !p112, !f111

CENTRAL HEATING OPERATION

BOILER OPERATING SWI

Next: !p128, ?129, ?131, ?133

DHW FLOW RESTRICTOR

{ISOLATEMAINSPOWER}
WATER OFF

Next: !p26, !f25

MAINS POWER SUPPLY

Next: !p31, !f30

DIVERTER VALVE MICROSWITCH VOLTAGE (DHW DEMAND)

{ISOLATEMAINSPOWER}<

Next: !p36, f35

SEQUENCE CONTROL PCB SUPPLY VOLTAGE (DHW DEMAND)

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: p54, !f53

OVERHEAT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE THE BOILER IS NOT IN AN OVERHEATED STATE

Next: p50, !f49

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p52, !f51

DHW FAN VOLTAGE

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: !p56, f55

SPARK ELECTRODE LEAD OUTPUT

{ISOLATEMAINSPOWER}
REMOVE ELECTRODE LEAD FROM BOILER

Next: p67, !f139

FLUE

Next: !p65, !f64

ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p137, !f138

PILOT SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT CONNECTOR CN4 FROM THE SEQUENCE CONTROL PCB

Next: p74, !f73

PILOT INJECTOR

{ISOLATEMAINSPOWER}

Next: !p76, !f75

DHW BURNER GAS PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p83, f82

MODUREG SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p94, !f93

DHW SENSOR RESISTANCE: HIGH FLAME

{ISOLATEMAINSPOWER}

Next: !p92, !f91

DHW MODULATION MODUREG VOLTAGE

BOILER OPERATING SWITCH / PROGRAMMER SET TO WATER ONLY

Next: !p99, !f98

System Information

  • Total Tests: 137
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control