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:

POTTERTON LYNX 2 LPG

G.C. NUMBER 47 590 0

Next: &15, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CH FAN RUNS

BOILER ON/OFF SWITCH ON
CH MODE SWITCH SET TO ITS 24HRS POSITION

Next: &105, f128

CH DIVERTER VALVE OPERATED

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &1, f193

CH PUMP RUNS

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &2, f116

DHW BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &3, f111

DHW BURNER HIGH FLAME

{ISOLATEMAINSPOWER}<

Next: &4, f106

DHW BURNER ESTABLISHED

BOILER ON/OFF SWITCH ON

Next: &5, f96

DHW BURNER IGNITES

BOILER ON/OFF SWITCH ON

Next: &6, f85

DHW FAN RUNS

BOILER ON/OFF SWITCH ON

Next: &177, f51

DHW DIVERTER VALVE NOT OPERATED

BOILER ON/OFF SWITCH ON

Next: &9, f46

DHW PUMP RUNS

BOILER ON/OFF SWITCH ON
ENSURE BOILER CH SWITCH IS IN OFF POSITION

Next: &10, f26

LOW PRESSURE NEON NOT ILLUMINATED

BOILER ON/OFF SWITCH ON

Next: &11, f21

DHW FLOW RATE

{ISOLATEMAINSPOWER}

Next: &12, f18

SYSTEM CHECK

{ISOLATEMAINSPOWER}
PLEASE ENSURE THE FOLLOWING SYSTEM CHECKS ARE COMPLETED

Next: &13, !f17

POTTERTON LYNX 2 LPG

{ISOLATEMAINSPOWER}<

Next: &14, !f16

BOILER LOCKOUT

{ISOLATEMAINSPOWER}<

Next: &139, !f143

WATER SYSTEM PRESSURE RISE

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &101, f144

CENTRAL HEATING OPERATION

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &102, ?151, ?153, ?155

HOT WATER OPERATION

BOILER ON/OFF SWITCH ON
DHW TEMPERATURE CONTROL TO MAX

Next: &103, ?147, ?149

CH BURNER ESTABLISHED

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &132, !f133

CH PUMP OVERRUN

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: &104, ?201, ?203

CH BURNER MODULATION

{ISOLATEMAINSPOWER}<

Next: &131, f134

BOILER RESET

{ISOLATEMAINSPOWER}
RECONNECT THE FLAME SENSE ELECTRODE LEAD
BOILER ON/OFF SWITCH ON

Next: &nff, f140

DHW SPARKING

BOILER ON/OFF SWITCH ON

Next: &7, f178

DHW BURNER HIGH FLAME

MODULATION COIL

Next: End

DHW BURNER HIGH FLAME

PRINTED CIRCUIT BOARD

Next: End

DHW BURNER MODULATION

DHW TEMPERATURE SENSOR

Next: End

DHW BURNER MODULATION

PRINTED CIRCUIT BOARD

Next: End

CH PUMP RUNS

BOILER ON/OFF SWITCH

Next: End

CH PUMP RUNS

CH MODE SWITCH

Next: End

CH PUMP RUNS

Next: End

CH FAN RUNS

CH TEMPERATURE SENSOR

Next: End

CH BURNER ESTABLISHED

PRINTED CIRCUIT BOARD

Next: End

CH BURNER MODULATION

CH TEMPERATURE SENSOR

Next: End

BOILER RESET

RESET SWITCH

Next: End

BOILER LOCKOUT

PRINTED CIRCUIT BOARD

Next: End

WATER SYSTEM PRESSURE RISE

EXPANSION VESSEL PIPE

Next: End

DHW DIVERTER VALVE NOT OPERATED

PRINTED CIRCUIT BOARD

Next: End

ELECTRICAL CHECKS

ELECTRICAL CHECKS

Next: End

DHW FLOW RATE

COLD WATER INLET FILTER/RESTRICTOR

Next: End

LOW PRESSURE NEON NOT ILLUMINATED

WATER PRESSURE SWITCH

Next: End

SYSTEM CHECKS

SYSTEM CHECKS

Next: End

AIR PRESSURE SWITCH NO AIR RESISTANCE

PRINTED CIRCUIT BOARD

Next: End

DHW SPARKING

AIR PRESSURE SENSING TUBE

Next: End

DHW SPARKING

FLUE

Next: End

DHW SPARKING

TRANSFORMER

Next: End

DHW SPARKING

SPARK ELECTRODE LEAD

Next: End

DHW SPARKING

SPARK ELECTRODE

Next: End

STUCK MADE

DHW FLOW SWITCH

Next: End

CH DIVERTER VALVE OPERATED

PRINTED CIRCUIT BOARD

Next: End

CH DIVERTER VALVE OPERATED

DIVERTER VALVE

Next: End

DEMAND WHEN SHOULDNT BE

Next: End

LOW PRESSURE NEON NOT ILLUMINATED

WATER SYSTEM PRESSURE

Next: End

DHW PUMP RUNS

PCB FUSE

Next: End

DHW PUMP RUNS

RESET SWITCH

Next: End

DHW PUMP RUNS

MAINS POWER INPUT

Next: End

DHW PUMP RUNS

BOILER ON/OFF SWITCH

Next: End

DHW PUMP RUNS

DHW FLOW SWITCH

Next: End

DHW DIVERTER VALUE NOT OPERATED

DIVERTER VALVE MOTOR HEAD

Next: End

DHW FAN RUNS

AIR PRESSURE SENSING TUBE

Next: End

DHW FAN RUNS

WATER PRESSURE SWITCH

Next: End

DHW FAN RUNS

DHW TEMPERATURE SENSOR

Next: End

DHW FAN RUNS

THERMOSTAT - DHW

Next: End

DHW FAN RUNS

PUMP FLOW SWITCH

Next: End

DHW BURNER IGNITES

THERMOSTAT - OVERHEAT

Next: End

DHW BURNER IGNITES

GAS VALVE COIL 1

Next: End

DHW BURNER IGNITES

GAS VALVE COIL 2

Next: End

DHW BURNER ESTABLISHED

FLAME SENSE ELECTRODE LEAD

Next: End

DHW BURNER ESTABLISHED

ELECTRODE

Next: End

DHW BURNER ESTABLISHED

PRINTED CIRCUIT BOARD

Next: End

DHW BURNER MODULATION

GAS VALVE

Next: End

CH PUMP RUNS

PRINTED CIRCUIT BOARD

Next: End

CH FAN RUNS

PRINTED CIRCUIT BOARD

Next: End

CH BURNER MODULATION

PRINTED CIRCUIT BOARD

Next: End

WATER SYSTEM PRESSURE RISE

EXPANSION VESSEL

Next: End

HOT WATER OPERATION

HEAT EXCHANGER

Next: End

HOT WATER OPERATION

DIVERTER VALVE

Next: End

CENTRAL HEATING OPERATION

DIVERTER VALVE

Next: End

CENTRAL HEATING OPERATION

HEAT EXCHANGER

Next: End

CENTRAL HEATING OPERATION

Next: End

TRANSFORMER INPUT VOLTAGE

PRINTED CIRCUIT BOARD

Next: End

DHW BURNER IGNITES

GAS VALVE

Next: End

DHW BURNER HIGH FLAME

GAS VALVE

Next: End

DHW FLOW RATE

HEAT EXCHANGER

Next: End

LOW PRESSURE NEON NOT ILLUMINATED

PRINTED CIRCUIT BOARD

Next: End

DHW PUMP VOLTAGE

PRINTED CIRCUIT BOARD

Next: End

BOILER RESET

PRINTED CIRCUIT BOARD

Next: End

DHW SPARKING

PRESSURE SWITCH

Next: End

DHW AIR PRESSURE SWITCH: AIR DETECT

PRINTED CIRCUIT BOARD

Next: End

DHW SPARK LEAD (SPARKING)

PRINTED CIRCUIT BOARD

Next: End

CH DIVERTER VALVE OPERATED

DIVERTER VALVE MOTOR HEAD

Next: End

CH PUMP OVERRUN

PRINTED CIRCUIT BOARD

Next: End

FIRING NO DEMAND - STUCK RELAY

PRINTED CIRCUIT BOARD

Next: End

DHW PUMP RUNS

TRANSFORMER

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW DIVERTER VALUE NOT OPERATED

DIVERTER VALVE

Next: End

DHW FAN RUNS

PRESSURE SWITCH

Next: End

DHW FAN RUNS

FAN ASSEMBLY

Next: End

WATER PRESSURE SWITCH RESISTANCE

PRINTED CIRCUIT BOARD

Next: End

DHW OVERHEAT THERMOSTAT RESISTANCE

PRINTED CIRCUIT BOARD

Next: End

DHW BURNER IGNITES

PRINTED CIRCUIT BOARD

Next: End

DHW BURNER IGNITES

BURNER INJECTOR

Next: End

DHW UNSATISFACTORY CH FLOW AND RADS COLD

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: !p148

DHW UNSATISFACTORY CH FLOW AND RADS HOT

CHARACTERISTIC TEST FROM HOT WATER OPERATION

Next: !p150

BOILER FIRES, CH FLOW PIPE COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p152

NOISY HEAT EXCHANGER, WATER CIRCULATING

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p154

HEAT EXCHANGER CH FLOW PIPE HOT, RADS COLD

CHARACTERISTIC TEST FROM CENTRAL HEATING OPERATION

Next: !p156

PUMP DOES NOT OVERRUN

CHARACTERISTIC TEST FROM CH PUMP OVERRUN

Next: !p202

BOILER CONTINUES TO FIRE WITH DEMAND REMOVED

CHARACTERISTIC TEST FROM CH PUMP OVERRUN

Next: p205

31/07/2013 08:34:51 1712_1_50_1 09/01/2018 09:11:04

22/12/2017 10:19:13

Next: End

GAS VALVE MODULATING (STAGE 2) SOLENOID RESISTANCE

{ISOLATEMAINSPOWER}

Next: p108, !f107

DHW THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: p113, !f112

BOILER ON/OFF SWITCH (CH RESISTANCE)

{ISOLATEMAINSPOWER}
BOILER ON/OFF SWITCH ON

Next: p118, !f117

CH THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p130, !f129

CH THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p138, !f136

RESET SWITCH RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p176, !f141

EXPANSION VESSEL PIPE

{ISOLATEMAINSPOWER}

Next: !p146, !f145

DHW IGNITION NEON

BOILER ON/OFF SWITCH ON

Next: p179, f180

DHW INLET FILTER/RESTRICTOR

{ISOLATEMAINSPOWER}
MAINS WATER OFF

Next: !p162, !f163

DHW AIR PRESSURE SWITCH: AIR DETECT

{ISOLATEMAINSPOWER}<

Next: p181, f182

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: p183, !f184

OBSERVATION DISCONNECT DHW FLOW SWITCH

{ISOLATEMAINSPOWER}<

Next: p194, !f195

WATER SYSTEM PRESSURE

{ISOLATEMAINSPOWER}

Next: p23, !f22

TRANSFORMER OUTPUT VOLTAGE 1

BOILER ON/OFF SWITCH OFF

Next: p28, f27

TRANSFORMER INPUT VOLTAGE

BOILER ON/OFF SWITCH ON

Next: p30, f29

2 AMP FUSE

{ISOLATEMAINSPOWER}

Next: p32, !f31

DHW FLOW SWITCH RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE DHW FLOW SWITCH PCB CONNECTOR PL4.

Next: p40, !f45

DHW DIVERTER VALVE MOTOR VOLTAGE

BOILER ON/OFF SWITCH ON

Next: p48, !f159

DHW DEMAND NEON

BOILER ON/OFF SWITCH ON

Next: p53, f52

DHW HOT WATER HEAT NEON

BOILER ON/OFF SWITCH ON

Next: p61, f60

AIR PRESSURE SWITCH TUBE

{ISOLATEMAINSPOWER}

Next: !p57, !f56

DHW OVERHEAT THERMOSTAT RESISTANCE

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

Next: p67, !f66

DHW GAS VALVE STAGE 1 VOLTAGE

BOILER ON/OFF SWITCH ON

Next: p87, f86

CH OVERHEAT THERMOSTAT RESISTANCE

{ISOLATEMAINSPOWER}
ENSURE THAT THE BOILER IS NOT IN AN OVERHEAT CONDITION

Next: !p89, !f88

GAS VALVE SOLENOID COIL 1 RESISTANCE

{ISOLATEMAINSPOWER}

Next: p93, !f92

SENSE ELECTRODE LEAD

{ISOLATEMAINSPOWER}

Next: p98, !f97

DHW BURNER HIGH FLAME VOLTAGE

BOILER ON/OFF SWITCH ON

Next: !p161, !f109

DHW MODULATION VOLTAGE

BOILER ON/OFF SWITCH ON

Next: !p115, !f114

CH MODE SWITCH RESISTANCE

{ISOLATEMAINSPOWER}
CH MODE SWITCH IN ITS 24HRS POSITION

Next: p120, !f119

ROOM THERMOSTAT/LINK RESISTANCE

{ISOLATEMAINSPOWER}
ROOM STAT IF FITTED CALLING

Next: !p122, !f121

ELECTRODE LEAD

{ISOLATEMAINSPOWER}
REMOVE ELECTRODE LEAD FROM BOILER

Next: p189, !f190

TRANSFORMER OUTPUT VOLTAGE 2

BOILER ON/OFF SWITCH OFF

Next: !p187, !f188

FLUE

Next: !p185, !f186

ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p191, !f192

CH DIVERTER VALVE VOLTAGE

BOILER ON/OFF SWITCH ON
CH MODE SWITCH IN ITS 24HRS POSITION

Next: p196, !f197

CH DIVERTER VALVE SEIZED

{ISOLATEMAINSPOWER}

Next: !p198, !f199

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: !p206, !f207

WATER PRESSURE SWITCH RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p164, !f166

DHW PUMP VOLTAGE

BOILER ON/OFF SWITCH ON

Next: !p38, f37

RESET SWITCH RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p34, !f33

MAINS POWER SUPPLY

Next: !p158, !f35

DHW BOILER ON/OFF SWITCH RESISTANCE

{ISOLATEMAINSPOWER}
BOILER ON/OFF SWITCH ON

Next: !p172, !f43

DHW DIVERTER VALVE MOTOR POSITION

{ISOLATEMAINSPOWER}

Next: !p50, !f49

AIR PRESSURE SWITCH NO AIR RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR PLUG FROM PL2 ON PCB

Next: p55, f54

DHW FAN VOLTAGE

BOILER ON/OFF SWITCH ON

Next: !p59, !f173

WATER PRESSURE SWITCH RESISTANCE

{ISOLATEMAINSPOWER}

Next: p63, !f62

DHW THERMISTOR RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p65, !f64

DHW PUMP FLOW SWITCH RESISTANCE

{ISOLATEMAINSPOWER}<

Next: !p69, !f68

DHW BURNER GAS PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p91, f90

GAS VALVE SOLENOID COIL 2 RESISTANCE

{ISOLATEMAINSPOWER}

Next: !p160, !f94

FLAME SENSE ELECTRODE

{ISOLATEMAINSPOWER}

Next: !p100, !f99

System Information

  • Total Tests: 162
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control