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:

IDEAL ICOS SYSTEM M3080

GLOBALLY REPLACED

Next: &110, *

NO FAULT FOUND

Next: nff

IDEAL ICOS SYSTEM M3080

{ISOLATEMAINSPOWER}<

Next: &599, !f111

OBSERVATION FAN RUNS ON CH

BOILER MAINS SWITCH ON
ENSURE BOILER IS COOL

Next: &325, ?950, ?952

OBSERVATION BURNER IGNITES ON CH

BOILER MAINS SWITCH ON

Next: &2711, ?1832, ?1834

POWER UP

ENSURE NO DEMANDS

Next: &623, ?837, ?839, ?2804

DIAGNOSTIC OPTIONS

PLEASE SELECT FROM O

Next: &1482, f624

OVER HEAT OPERATED

Next: &nff, f966

OBSERVATION DOES BOILER RECOGNISE A CH DEMAND

BOILER MAINS SWITCH ON
BOILER CH THERMOSTAT TO MAX

Next: &3163, f1483

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f2276

CH OPERATION

BOILER MAINS SWITCH ON
BOILER CH THERMOSTAT TO MAXIMUM

Next: &2858, ?2712, ?2714, ?2716, ?2718, ?2827

CH BURNER MODULATION

BOILER MAINS SWITCH ON
BOILER CH THERMOSTAT TO MAX

Next: &2912, ?2876, ?2889

DHW OPERATION

BOILER ON OFF SWITCH ON

Next: &nff, ?2913, ?2915

OBSERVATION PUMP RUNS ON CH

BOILER MAINS SWITCH ON

Next: &136, ?3164, ?3166

PUMP VOLTAGE PREHEAT COMPLETE9999

PCB

Next: End

DETACHED

SENSOR FITMENT

Next: End

9999999STICKING PREHEAT COMPLETE

PUMP

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

REPAIR AS NEC

THERMISTOR HARNESS

Next: End

OUTPUT TO DISPLAY BOARD POWER UP

PCB

Next: End

FC DIAG H_N

POLARITY REVERSAL

Next: End

LF OR HF DOT FAULT CODE

FLAME DETECTION ELECTRODE

Next: End

DOES NOT RECOGNISE DEMAND

FAN

Next: End

DOES NOT RECOGNISE DEMAND

HARNESS FAN

Next: End

1 DASH/DOT FAULT CODE

HARNESS MAIN PCB DISPLAY BOARD

Next: End

DASH/DOT FAULT CODE

USER CONTROL (DISPLAY UNIT)

Next: End

NO LIGHTS

PCB AND FAN

Next: End

POWER UP

HARNESS MAIN PCB DISPLAY BOARD

Next: End

ONLY ON OFF SWITCH ILLUMINATED

USER CONTROLS HOUSING

Next: End

FLASHES LA OR HA

BOILER OVERHEAT

Next: End

LA OR HA FAULT CODE

OVERHEAT THERMOSTAT

Next: End

LA OR HA RESETS SHOWS 3 DASHES

BOILER OVERHEAT

Next: End

3 DASHES

BOILER OVERHEAT

Next: End

BURNER IGNITES (PREHEAT)

GAS INLET PRESSURE

Next: End

BURNER ESTABLISHES (PREHEAT)

FLAME DETECTION ELECTRODE

Next: End

DASH/DOT FAULT CODE

USER CONTROLS HOUSING

Next: End

POWER UP

HARNESS MAIN PCB DISPLAY BOARD PLUS SWITCH

Next: End

DOES NOT RUN 2

HARNESS FAN

Next: End

FAN DOES NOT RUN

FLAME DETECTION ELECTRODE

Next: End

DOES NOT RUN 3

HARNESS FAN

Next: End

FAN DAMAGED PCB

PCB AND FAN

Next: End

FAN DOES NOT RUN 2

FLAME DETECTION ELECTRODE

Next: End

DOES NOT RUN

HARNESS FAN

Next: End

FAN DAMAGED PCB 2

PCB AND FAN

Next: End

FAN DOES NOT RUN L8

FLAME DETECTION ELECTRODE

Next: End

DOES NOT RUN 3 L8

HARNESS FAN

Next: End

FAN DAMAGED PCB L8

PCB AND FAN

Next: End

FAN DOES NOT RUN 2 L8

FLAME DETECTION ELECTRODE

Next: End

DOES NOT RUN L8

HARNESS FAN

Next: End

FAN DAMAGED PCB 2 L8

PCB AND FAN

Next: End

DOES NOT RUN 2 L8

HARNESS FAN

Next: End

FUSE BLOWN 3

GAS VALVE/PUMP HARNESS

Next: End

FUSE F1 BLOWS PREHEAT

FAN

Next: End

FUSE BLOW

GAS VALVE

Next: End

POWER UP

FUSE MAINS

Next: End

POWER UP

FUSE MAIN PCB F1

Next: End

BURNER ESTABLISHES (PREHEAT)

CONDENSATE TRAP AND SEAL

Next: End

BURNER IGNITES (PREHEAT)

FLUE

Next: End

BURNER ESTABLISHES (PREHEAT)

TURRET GASKET

Next: End

GAP

FLAME DETECTION ELECTRODE GAP

Next: End

BURNER ESTABLISHES (PREHEAT)

BURNER

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

INSULATION COMBUSTION CHAMBER

Next: End

BURNER DOES NOT IGNITE

IMPULSE TUBE

Next: End

BURNER IGNITES (PREHEAT)

BURNER INJECTOR

Next: End

BURNER IGNITES (PREHEAT)

CONDENSATE TRAP AND SEAL

Next: End

BURNER IGNBURNER ESTABLISHES (PREHEAT)

BURNER

Next: End

BURNER DOES NOT IGNITE

INSULATION COMBUSTION CHAMBER

Next: End

SPARKING BUT DOES NOT IGNITE

FLUE WAYS

Next: End

WATER

IMPULSE TUBE

Next: End

FAULT FURTHER INVESTIGATION

OVERHEAT THERMOSTAT

Next: End

BURNER IGNITES (PREHEAT)

GAS VALVE

Next: End

SPARKING PRESENT BUT NO IGNITION

PCB

Next: End

BURNER DOES NOT IGNITE

CONDENSATE TRAP AND SEAL

Next: End

BURNER DOES NOT IGNITE

BURNER INJECTOR

Next: End

BURNER IGNITES (PREHEAT) LF

GAS INLET PRESSURE

Next: End

BURNER ESTABLISHES (PREHEAT) LF

FLAME DETECTION ELECTRODE

Next: End

BURNER ESTABLISHES (PREHEAT) LF

CONDENSATE TRAP AND SEAL

Next: End

BURNER IGNITES (PREHEAT) LF

FLUE

Next: End

BURNER ESTABLISHES (PREHEAT) LF

TURRET GASKET

Next: End

GAP LF

FLAME DETECTION ELECTRODE GAP

Next: End

BURNER ESTABLISHES (PREHEAT) LF

BURNER

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH LF

INSULATION COMBUSTION CHAMBER

Next: End

BURNER ESTABLISH LF

PRIMARY HEAT EXCHANGER

Next: End

NOT IGNITING

IGNITION ELECTRODE WARPED

Next: End

BURNER IGNITES (PREHEAT)

IGNITION ELECTRODE AND LEAD

Next: End

BURNER IGNITES (PREHEAT) LF

IGNITION ELECTRODE AND LEAD

Next: End

BURNER DOES NOT IGNITE LF

IMPULSE TUBE

Next: End

BURNER IGNITES (PREHEAT) LF

BURNER INJECTOR

Next: End

BURNER IGNITES (PREHEAT) LF

CONDENSATE TRAP AND SEAL

Next: End

BURNER IGNBURNER ESTABLISHES (PREHEAT) LF

BURNER

Next: End

BURNER DOES NOT IGNITE LF

INSULATION COMBUSTION CHAMBER

Next: End

SPARKING BUT DOES NOT IGNITE LF

FLUE WAYS

Next: End

NOT IGNITING LF

IGNITION ELECTRODE WARPED

Next: End

WATER LF

IMPULSE TUBE

Next: End

FAULT FURTHER INVESTIGATION LF

OVERHEAT THERMOSTAT

Next: End

BURNER IGNITES (PREHEAT) LF

GAS VALVE

Next: End

SPARKING PRESENT BUT NO IGNITION LF

PCB

Next: End

BURNER DOES NOT IGNITE LF

CONDENSATE TRAP AND SEAL

Next: End

BURNER DOES NOT IGNITE LF

BURNER INJECTOR

Next: End

LA OR HA RESETS SHOWS 3 DASHES H9 L9

BOILER OVERHEAT

Next: End

LA OR HA FAULT CODE H9 L9

OVERHEAT THERMOSTAT

Next: End

FLASHES LA OR HA H9 L9

BOILER OVERHEAT

Next: End

PRE HEATFCDIAG 2

FLAME DETECTION ELECTRODE

Next: End

HE / LE 2

FAN

Next: End

HE OR LE FAULT CODES 2

SENSOR FITMENT

Next: End

HE / LE 2

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

PRE HEATFCDIAG 2 2

FLAME DETECTION ELECTRODE

Next: End

HE / LE 2 2

FAN

Next: End

HE OR LE FAULT CODES 2 2

SENSOR FITMENT

Next: End

HE / LE 2 2

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

FAN DOES NOT RUN

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

H5 INVESTIGATION

PCB JUMPER SETTINGS

Next: End

H3 INVESTIGATION

PCB JUMPER SETTINGS

Next: End

H2 INVESTIGATION

PCB JUMPER SETTINGS

Next: End

LA OR HA NO RESET

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

3 DASHES NO RESET

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

LA OR HA THEN 3 DASHES

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

3 DASHES

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

3 DASHES FAULT CODE

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

LA OR HA NO RESET H9 L9

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

3 DASHES NO RESET H9 L9

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

LA OR HA THEN 3 DASHES H9 L9

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

CH DEMAND

Next: End

HE / LE

OVERHEAT THERMOSTAT

Next: End

RADS COOL CH OP 2

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

NOISY 3

SYSTEM FILL AND VENT

Next: End

CH NOISY OPERATION

Next: End

CH OPERATION

PUMP

Next: End

RADIATORS COOL BOILER TO TEMPERATURE

Next: End

CH OPERATION 2

PUMP

Next: End

OPEN TOO MUCH 2

Next: End

PREMATURE SHUTDOWN 1

USER CONTROL (DISPLAY UNIT)

Next: End

PREMATURE SHUTDOWN

TURRET GASKET

Next: End

PREMATURE SHUTDOWN

CONDENSATE TRAP AND SEAL

Next: End

PREMATURE SHUTDOWN

USER CONTROL (DISPLAY UNIT)

Next: End

CH OPERATION

TURRET GASKET

Next: End

RESTRICTED OR BLOCKED 8

CONDENSATE TRAP AND SEAL

Next: End

CH OPERATION NOISY

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

CH OPERATION NOISY

PUMP

Next: End

PREHEAT SATISFACTORY

CONDENSATE TRAP AND SEAL

Next: End

DHW OPERATION POOR TEMP RISE

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

DHW BURNER MODULATION

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

CH MODULATION

USER CONTROL (DISPLAY UNIT)

Next: End

CH BURNER MODULATION

USER CONTROL (DISPLAY UNIT)

Next: End

RESTRICTED OR BLOCKED 2

CONDENSATE TRAP AND SEAL

Next: End

LOW 2

GAS INLET PRESSURE

Next: End

RESTRICTED OR BLOCKED

IMPULSE TUBE

Next: End

INNER BREACHED OR BLOCKED

FLUE

Next: End

LEAKING CAUSING BAFFLING ETC

TURRET GASKET

Next: End

DAMAGED OR BLOCKED

BURNER

Next: End

COLLAPSED IN AFFECTING COMBUSTION

INSULATION COMBUSTION CHAMBER

Next: End

RESTRICTED OR BLOCKED

FLUE WAYS

Next: End

RESTRICTED OR BLOCKED 2

BURNER INJECTOR

Next: End

SHORTED

EMC FILTER

Next: End

OVERHEAT OPERATED

SYSTEM FILL AND VENT

Next: End

H_1 FC DIAGOVERHEAT SECTION

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

OVERHEAT

USER CONTROL (DISPLAY UNIT)

Next: End

POTS

USER CONTROL (DISPLAY UNIT)

Next: End

CLOSED TOO MUCH 3

Next: End

OVERHEAT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

2OVERHEAT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

HE / LE 2

OVERHEAT THERMOSTAT

Next: End

CH OPERATION UNSUFFICIENT OUTPUT

FLUE WAYS

Next: End

DHW OPERATION POOR TEMP RISE

FLUE THERMISTOR

Next: End

RUNNING SLOW / WEAK 2

PUMP

Next: End

CLOSED TOO MUCH 2

Next: End

LOW

GAS INLET PRESSURE

Next: End

RESTRICTED OR BLOCKED

BURNER INJECTOR

Next: End

RESTRICTED OR BLOCKED - POOR DHW

CONDENSATE TRAP AND SEAL

Next: End

RESTRICTED POOR DHW

BURNER

Next: End

CH OPERATION INSUFFICEINT HEAT

FLUE WAYS

Next: End

3 DASHES 3

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES 6

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES 5

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES 4

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES 2

USER CONTROL (DISPLAY UNIT)

Next: End

LA OR HA RESETS

BOILER OVERHEAT

Next: End

H9 OR L9 RESETS

BOILER OVERHEAT

Next: End

CH OP UP TO TEMP RADS COOL

SYSTEM FILL AND VENT

Next: End

ON WITH NO DEMAND

PCB

Next: End

PUMP RUNS (PREHEAT)

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

PUMP RUNS PREHEAT

THERMISTOR HARNESS

Next: End

PUMPVOLTAGE PUMP RUNS PRE HEAT

PCB

Next: End

FLAME DETECTION

PCB

Next: End

H_4 FC DIAG 2

FLUE THERMISTOR

Next: End

FC DIAG H_4 NOT FILLED AND VENTED

SYSTEM FILL AND VENT

Next: End

H_1 FC DIAG

THERMISTOR - BOILER CONTROL ( FLOW)

Next: End

POWER UP

Next: End

FAULT

EMC FILTER

Next: End

POWER UP

PCB

Next: End

PRE HEATFCDIAG99

FLAME DETECTION ELECTRODE

Next: End

PREHAT COMPLET9999

PUMP

Next: End

HA FCODE

FLUE THERMISTOR

Next: End

FLASHES H THEN N

PCB

Next: End

HB OR LB FAULT CODE

USER CONTROLS

Next: End

LF OR HF DOT FAULT CODE

PCB

Next: End

1 DASH/DOT FAULT CODE

PCB

Next: End

POWER UP

PCB DISPLAY BOARD PLUS SWITCH

Next: End

POWER UP OUT PUT TO DISPLAY BOARD

PCB MAIN PLUS SWITCH

Next: End

NO LIGHTS

HARNESS FAN

Next: End

POWER UP

USER CONTROL (DISPLAY UNIT)

Next: End

3 DASHES FAULT CODE

PCB

Next: End

FLASHES LA OR HA

Z DIRECTION CHOICE OR CONTINUE

Next: End

LA OR HA FAULT CODE

GAS VALVE/PUMP HARNESS

Next: End

OVERHEAT

PCB

Next: End

LA OR HA RESETS SHOWS 3 DASHES

Z DIRECTION CHOICE OR CONTINUE

Next: End

OVERHEAT TEMPERATURE

PCB

Next: End

OVERHEAT 3 DASHES FAULT CODE

Z DIRECTION CHOICE OR CONTINUE

Next: End

NO LIGHTS

USER CONTROLS HOUSING PLUS SWITCH

Next: End

FAN RUNS (PREHEAT)9 DOES NOT RUN

PCB

Next: End

FC DIAG DOES NOT RUN

FAN

Next: End

FAN RUNS (PREHEAT)9 DOES NOT RUN L8

PCB

Next: End

FAN DOES NOT RUN L8

PCB

Next: End

FC DIAG DOES NOT RUN L8

FAN

Next: End

BLOWING FUSES

PUMP

Next: End

FUSE BLOWN

HARNESS FAN

Next: End

FUSE BLOWN 2

GAS VALVE/PUMP HARNESS

Next: End

BLANK FOR MAINS FUSE INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BLANK FOR PCB FUSE INVESTIGATION

Z DIRECTION CHOICE OR CONTINUE

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

PCB

Next: End

PRESSURE DROPS AWAY

GAS INLET PRESSURE

Next: End

BURNER DOES NOT IGNITE

OVERHEAT THERMOSTAT

Next: End

BURNER DOES NOT IGNITE

THERMISTOR HARNESS

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH LF

PCB

Next: End

WRONG MIX

GAS VALVE

Next: End

MECH FAULT

GAS VALVE

Next: End

NO SPARKING PRESENT

IGNITION ELECTRODE GAP

Next: End

NO SPARKING PRESENT AT ELECTRODE

PCB

Next: End

NO SPARKING PRESENT LF

IGNITION ELECTRODE GAP

Next: End

NO SPARKING PRESENT AT ELECTRODE LF

PCB

Next: End

PRESSURE DROPS AWAY LF

GAS INLET PRESSURE

Next: End

WRONG MIX LF

GAS VALVE

Next: End

BURNER DOES NOT IGNITE LF

OVERHEAT THERMOSTAT

Next: End

BURNER DOES NOT IGNITE LF

THERMISTOR HARNESS

Next: End

MECH FAULT LF

GAS VALVE

Next: End

OVERHEAT TEMPERATURE H9 L9

PCB

Next: End

LA OR HA RESETS SHOWS 3 DASHES H9 L9

Z DIRECTION CHOICE OR CONTINUE

Next: End

LA OR HA FAULT CODE H9 L9

GAS VALVE/PUMP HARNESS

Next: End

FLASHES LA OR HA H9 L9

Z DIRECTION CHOICE OR CONTINUE

Next: End

FAN DOES NOT RUN

PCB

Next: End

H5 INVESTIGATION

PCB

Next: End

H3 INVESTIGATION

PCB

Next: End

H2 INVESTIGATION

PCB

Next: End

LA OR HA NO CONTROL THERMISTOR

THERMISTOR HARNESS

Next: End

RESETS SHOWS 3 DASHES FLOW

THERMISTOR HARNESS

Next: End

3 DASHES

THERMISTOR HARNESS

Next: End

3 DASHES FLOW THERMISTOR

THERMISTOR HARNESS

Next: End

3 DASHES FLOW

THERMISTOR HARNESS

Next: End

LA OR HA NO CONTROL THERMISTOR H9 L9

THERMISTOR HARNESS

Next: End

RESETS SHOWS 3 DASHES FLOW H9 L9

THERMISTOR HARNESS

Next: End

3 DASHES H9 L9

THERMISTOR HARNESS

Next: End

EXTERNAL CONTROL

HARNESS INPUT

Next: End

L_E FC DIAG 2

PCB

Next: End

CH OPERATION

EXPANSION VESSEL

Next: End

RADIATORS COOL, BOILER TO TEMPERATURE

Next: End

PREMATURE SHUTDOWN 2

PCB

Next: End

PREMATURE SHUTDOWN OR BOILER DOESNT FIRE

PCB

Next: End

ON WITH NO DEMAND

Next: End

CH OPERATION NOISY

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

CH MODULATION

PCB

Next: End

CH BURNER MODULATION

PCB

Next: End

WRONG MIX 2

GAS VALVE

Next: End

PCB - FUSE BLOWN

PCB - FUSE BLOWN

Next: End

DHW OPERATION UNSATISFACTORY

Next: End

DHW OPERATION DOES NOT RESPOND

Next: End

NOT RECOGNISE DEMAND

PCB

Next: End

OVERHEAT

NO FAULT - OVERHEAT

Next: End

2OVERHEAT

NO FAULT - OVERHEAT

Next: End

L_E FC DIAG 2 2

PCB

Next: End

RADS ONLY GET WARM

Next: End

BOILER CYCLING POOR TEMP RISE

PCB

Next: End

3 DASHES 2

PCB

Next: End

3 DASHES

PCB

Next: End

H9 OR L9

PCB

Next: End

3 DASHES 4

PCB

Next: End

3 DASHES 3

PCB

Next: End

3 DASHES 6

PCB

Next: End

3 DASHES 5

PCB

Next: End

LA OR HA RESETS RESETS

Z DIRECTION CHOICE OR CONTINUE

Next: End

H9 OR L9 RESETS

Z DIRECTION CHOICE OR CONTINUE

Next: End

PUMP RUNS THEN STOPS

PCB

Next: End

PUMP RUNS (PREHEAT)

PUMP

Next: End

FROM PCB

GAS VALVE/PUMP HARNESS

Next: End

H_F FC DIAG

FLAME DETECTION ELECTRODE

Next: End

H_4 FC DIAG

PCB

Next: End

FLUE FC DIAG 2

THERMISTOR HARNESS

Next: End

CLEAN REPLACE AS NEC FC DIAG

PRIMARY HEAT EXCHANGER

Next: End

H_1 FC DIAG

PCB

Next: End

FLOW FC DIAG

THERMISTOR HARNESS

Next: End

FAULT

KIT - EMC FILTER (HARNESS)

Next: End

POWER UP

ON OFF SWITCH

Next: End

L_E FC DIAG99

PCB

Next: End

FLASHES H THEN 5

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2642

HB OR LB (B WILL BE IN LOWER CASE)

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: !p1472

1 DASH AND/OR DOT

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p1474

FLASHES L THEN F. OR H THEN F. (NOTE THE DOT AFTER THE F)

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p1476

3 DASHES

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p1696

WILL NOT RESET

CHARACTERISTIC TEST FROM CAN BOILER BE RESET

Next: p1740

RESETS SHOWS 3 DASHES

CHARACTERISTIC TEST FROM CAN BOILER BE RESET

Next: p1742

BURNER IGNITES BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES ON CH

Next: p1833

BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES ON CH

Next: p1835

GAS FLOW PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM GAS FLOW

Next: !p2348

GAS FLOW PRESSURE DIPS BUT STILL NO IGNITION

CHARACTERISTIC TEST FROM GAS FLOW

Next: p2350

SPARK GAP INCORRECT

CHARACTERISTIC TEST FROM IGNITION ELECTRODE SPARKING AND GAP

Next: !p2460

SPARK GAP CORRECT BUT NO SPARK PRESENT

CHARACTERISTIC TEST FROM IGNITION ELECTRODE SPARKING AND GAP

Next: p2463

SPARK GAP INCORRECT

CHARACTERISTIC TEST FROM IGNITION ELECTRODE SPARKING AND GAP

Next: !p2475

SPARK GAP CORRECT BUT NO SPARK PRESENT

CHARACTERISTIC TEST FROM IGNITION ELECTRODE SPARKING AND GAP

Next: p2477

GAS FLOW PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM GAS FLOW

Next: !p2483

GAS FLOW PRESSURE DIPS BUT STILL NO IGNITION

CHARACTERISTIC TEST FROM GAS FLOW

Next: p2485

FLASHES H9 OR L9

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2518

WILL NOT RESET

CHARACTERISTIC TEST FROM CAN BOILER BE RESET

Next: p2521

RESETS SHOWS 3 DASHES

CHARACTERISTIC TEST FROM CAN BOILER BE RESET

Next: p2523

CH NOISY OPERATION / KETTLING

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2713

BOILER FIRES FOR CH AND REACHES TEMPERATURE BUT RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p3154

BOILER SHUTS DOWN PREMATURELY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2717

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM CH OPERATION

Next: !p2719

BOILER FIRES WITH NO DEMAND DISPLAY SHOWS C

CHARACTERISTIC TEST FROM POWER UP

Next: p2805

BOILER CONTINUES TO FIRE BUT RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p2828

BURNER DOES NOT MODULATE

CHARACTERISTIC TEST FROM CH BURNER MODULATION

Next: p2880

NOISE WHEN MODULATING DOWN

CHARACTERISTIC TEST FROM CH BURNER MODULATION

Next: p2890

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p2914

BOILER DOES NOT RESPOND TO DHW DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p2916

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS ON CH

Next: p3165

PUMP RUNS FOR APPROXIMATELY 5 SECONDS THEN STOPS

CHARACTERISTIC TEST FROM OBSERVATION PUMP RUNS ON CH

Next: p3167

FLASHES L THEN E

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2623

FLASHES LA OR HA

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p1227

FLASHES L THEN 8

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2024

FLASHES H THEN 1

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p633

FLASHES H THEN 2

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2648

FLASHES H THEN 3

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2645

FLASHES H THEN 4

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p639

FLASHES H THEN F

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p641

FLASHES H THEN N

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p1468

FLASHES H THEN E

CHARACTERISTIC TEST FROM WHAT FAULT CODE IS SHOWN (PASS=L/F)

Next: p2609

NO LIGHTS

CHARACTERISTIC TEST FROM POWER UP

Next: p892

ONLY ON OFF SWITCH ILLUMINATED

CHARACTERISTIC TEST FROM POWER UP

Next: p866

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON CH

Next: p1991

FAN HUNTS RUNS SLOWS RUNS SLOWS

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON CH

Next: p959

05/11/2019 13:45:14 1910_2_50_1 20/11/2019 09:45:20

06/11/2019 09:26:16

Next: End

PUMP VOLTAGE

{ISOLATEMAINSPOWER}
BOILER MAINS SWITCH ON

Next: !p1070, !f1071

HARNESS CHECK - THERMISTORS

{ISOLATEMAINSPOWER}

Next: !p1237, !f1238

POWER TO DISPLAY BOARD

{ISOLATEMAINSPOWER}
LOWER MAIN PCB
DISCONNECT DISPLAY HARNESS FROM THE MAIN PCB

Next: !p1577, f1578

EXTERNAL CONTROLS VOLTAGE OUT PCB

Next: p1484, f2675

RESISTANCE FAN AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE FAN CONNECTOR FROM THE PCB

Next: !p1579, f1580

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: !p1581, !f1582

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p1704, f2663

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: p3116, f2660

OVERHEAT THERMOSTAT AND HARNESS RESISTANCE

{ISOLATEMAINSPOWER}

Next: p1747, f1748

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: !p1749, !f1750

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p1771, f2657

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: p3138, f2654

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2008, !f2009

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2017, !f2018

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2027, !f2028

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2035, !f2036

RESISTANCE PUMP AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE THE PUMP CONNECTOR FROM THE PCB

Next: p2277, f2278

RESISTANCE HARNESS PUMP

{ISOLATEMAINSPOWER}<

Next: !p2279, !f2280

FAN RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE HARNESS FROM FAN

Next: !p2283, !f2284

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM GAS VALVE

Next: !p2287, !f2288

FURTHER INVESTIGATION FUSE (MAINS)

Next: !p2299, !f2300

FURTHER INVESTIGATION FUSE (PCB)

Next: !p2302, !f2303

FURTHER INVESTIGATION OVERHEAT

Next: !p2367, !f2368

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM GAS VALVE

Next: !p2371, !f2372

IGNITION ELECTRODE SPARKING AND GAP

{ISOLATEMAINSPOWER}<

Next: p2473, ?2474, ?2476

FURTHER INVESTIGATION OVERHEAT

Next: !p2504, !f2505

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT LEADS FROM GAS VALVE

Next: !p2508, !f2509

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p2526, f2672

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: p3131, f2669

OVERHEAT THERMOSTAT AND HARNESS RESISTANCE

{ISOLATEMAINSPOWER}

Next: p2558, f2559

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: !p2560, !f2561

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2652, !f2653

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2655, !f2656

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2658, !f2659

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2661, !f2662

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2664, !f2665

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2667, !f2668

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2670, !f2671

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2673, !f2674

EXTERNAL CONTROLS CALLING

{ISOLATEMAINSPOWER}
GAIN ACCESS TO TERMINAL STRIP

Next: !p2676, !f2677

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: p2792, !f2793

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: !p2885, !f2886

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: p3056, !f2982

PRESSURE GAS INLET (OPERATION)

{ISOLATEMAINSPOWER}<

Next: p3104, !f3105

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: !p3119, !f3145

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: !p3134, !f3135

RESISTANCE CH POTENTIOMETER

{ISOLATEMAINSPOWER}<

Next: !p3141, !f3142

PUMP VOLTAGE AT PCB

BOILER MAINS SWITCH ON

Next: !p3174, !f3175

WHAT FAULT CODE IS SHOWN

ON /OFF SWITCH ON

Next: p625, ?626, ?628, ?630, ?632, ?634, ?636, ?638, ?640, ?642, ?811, ?1225, ?1471, ?1473, ?1475, ?1695, ?2516

RESISTANCE CONTROL THERMISTOR FLUE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p652, f653

RESISTANCE CONTROL THERMISTOR FLUE

{ISOLATEMAINSPOWER}<

Next: !p654, !f655

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p672, !f673

FUSE RESISTANCE (FUSED SPUR)

{ISOLATEMAINSPOWER}
REMOVE FUSE FROM FUSED SPUR

Next: p895, f2298

ON/OFF SWITCH VOLTAGE INPUT

{ISOLATEMAINSPOWER}
REMOVE CONTROL DISPLAY

Next: !p908, !f909

PUMP RUNS

BOILER MAINS SWITCH ON

Next: p1068, f1069

SENSOR FIXINGS

{ISOLATEMAINSPOWER}

Next: p2917, !f1072

PUMP LIMPET

Next: p3014, !f1075

CAN BOILER BE RESET

Next: p3147, ?1739, ?1741

RESISTANCE HARNESS PCB TO DISPLAY BOARD

{ISOLATEMAINSPOWER}
DISCONNECT THE HARNESS FROM MAIN PCB TO DISPLAY PCB

Next: p1588, !f1589

RESISTANCE HARNESS PCB TO DISPLAY BOARD

{ISOLATEMAINSPOWER}
DISCONNECT THE HARNESS FROM MAIN PCB TO DISPLAY PCB

Next: !p1983, !f1984

VOLTAGE POLARITY

{ISOLATEMAINSPOWER}
GAIN ACCESS TO MAINS TERMINAL (USE INSULATION MAT AS REQUIRED)

Next: !p1469, !f1470

RESISTANCE HARNESS PCB TO DISPLAY BOARD

{ISOLATEMAINSPOWER}
DISCONNECT THE HARNESS FROM MAIN PCB TO DISPLAY PCB

Next: p1571, !f1574

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p1477, !f1478

OBSERVATION DISCONNECT FAN - DEMAND RECOGNISED?

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p1488, !f1489

OBSERVATION DISCONNECT FAN HARNESS - DEMAND RECOGNISED?

{ISOLATEMAINSPOWER}
REMOVE FAN CONNECTOR FROM PCB

Next: !p3013, !f1491

RESISTANCE USER CONTROLS HOUSING

{ISOLATEMAINSPOWER}

Next: p1572, !f1919

INSPECTION DISPLAY PCB CONNECTIONS

{ISOLATEMAINSPOWER}
REMOVE THE DISPLAY PCB

Next: !p1575, !f1576

RESISTANCE USER CONTROLS HOUSING

{ISOLATEMAINSPOWER}

Next: !p1590, !f1591

HEAT EXCHANGER TEMP

Next: p1697, f1698

COOL HEAT EXCHANGER AND RESET APPLIANCE

ALLOW FAN OVERRUN TO COMMENCE

Next: p1699, f1701

FURTHER INVESTIGATION OVERHEAT

Next: !p1778, !f1779

COOL DOWN HEAT EXCHANGER AND RESET APPLIANCE

ALLOW FAN OVERRUN TO COMMENCE

Next: p1743, f1744

HEAT EXCHANGER TEMP

Next: p1758, f1759

FURTHER INVESTIGATION OVERHEAT

Next: !p1745, !f1746

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p1751, f2651

COOL HEAT EXCHANGER AND RESET APPLIANCE

ALLOW FAN OVERRUN TO COMMENCE

Next: p1760, f1761

FURTHER INVESTIGATION OVERHEAT

Next: !p1762, !f1763

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p1836, !f1837

IGNITION ELECTRODE SPARKING AND GAP

{ISOLATEMAINSPOWER}<

Next: p2345, ?2459, ?2461

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2304, !f1908

VOLTAGE PERMANENT FAN HALL SENSOR

{ISOLATEMAINSPOWER}<

Next: p1992, f2007

VOLTAGE FAN AT PCB

{ISOLATEMAINSPOWER}<

Next: p1998, f2016

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: !p2019, !f2001

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: p2010, !f2011

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: !p2012, !f2013

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: p2020, !f2021

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: p2636, !f2023

VOLTAGE PERMANENT FAN HALL SENSOR

{ISOLATEMAINSPOWER}<

Next: p2025, f2026

VOLTAGE FAN AT PCB

{ISOLATEMAINSPOWER}<

Next: p2033, f2034

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: p2029, !f2030

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: !p2031, !f2032

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: !p2041, !f2042

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}

Next: p2037, !f2038

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: !p2039, !f2040

RESISTANCE FAN AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE FAN CONNECTOR FROM THE PCB

Next: p2281, f2282

RESISTANCE GAS VALVE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE THE 12 WAY CONNECTOR FROM THE FRONT OF THE PCB

Next: p2909, f2286

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2320, !f2305

INSPECTION FLUE

Next: p2321, !f2322

PRIMARY FLUE SEAL

{ISOLATEMAINSPOWER}

Next: p2335, !f2324

FLAME DETECTION ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: p2336, !f2337

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p2338, !f2339

INSULATION PADS

{ISOLATEMAINSPOWER}
REMOVE FAN AND BURNER

Next: p2340, !f2341

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: !p2342, !f3063

GAS VALVE OPENS

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2346, ?2347, ?2349

CHECK IMPULSE TUBE

{ISOLATEMAINSPOWER}

Next: p2363, !f2364

CHECK IMPULSE TUBE

{ISOLATEMAINSPOWER}

Next: p2351, !f2352

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: p2353, !f2354

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2355, !f2356

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p2357, !f2358

INSULATION PADS

{ISOLATEMAINSPOWER}
REMOVE FAN AND BURNER

Next: p2359, !f2360

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: p2452, !f2362

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: p2365, f2366

RESISTANCE GAS VALVE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE THE 12 WAY CONNECTOR FROM THE FRONT OF THE PCB

Next: p2369, f2370

VOLTAGE GAS VALVE AT PCB

{ISOLATEMAINSPOWER}
BOILER ON/OFF SWITCH ON

Next: p2373, !f2374

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2375, !f2376

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: !p2455, !f2378

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p2383, !f2384

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2385, !f2386

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2387, !f2388

INSPECTION FLUE

Next: p2389, !f2390

PRIMARY FLUE SEAL

{ISOLATEMAINSPOWER}

Next: p2391, !f2392

FLAME DETECTION ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: p2393, !f2394

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p2395, !f2396

INSULATION PADS

{ISOLATEMAINSPOWER}
REMOVE FAN AND BURNER

Next: p2397, !f2398

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: !p2399, !f2400

IGNITION ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: !p2453, !f2469

IGNITION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE IGNITION ELECTRODE FROM ITS HOUSING

Next: !p2471, !f2470

GAS VALVE OPENS

{ISOLATEMAINSPOWER}
ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2480, ?2482, ?2484

IGNITION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE IGNITION ELECTRODE FROM ITS HOUSING

Next: !p2478, !f2479

CHECK IMPULSE TUBE

{ISOLATEMAINSPOWER}

Next: p2500, !f2501

CHECK IMPULSE TUBE

{ISOLATEMAINSPOWER}

Next: p2486, !f2487

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: p2488, !f2489

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2490, !f2491

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p2492, !f2493

INSULATION PADS

{ISOLATEMAINSPOWER}
REMOVE FAN AND BURNER

Next: p2494, !f2495

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: p2496, !f2497

IGNITION ELECTRODE GAP

{ISOLATEMAINSPOWER}

Next: !p2498, !f2499

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: p2502, f2503

RESISTANCE GAS VALVE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE THE 12 WAY CONNECTOR FROM THE FRONT OF THE PCB

Next: p2506, f2507

VOLTAGE GAS VALVE AT PCB

{ISOLATEMAINSPOWER}
BOILER ON/OFF SWITCH ON

Next: p2510, !f2511

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2512, !f2513

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: !p2514, !f2515

CAN BOILER BE RESET

Next: p3151, ?2520, ?2522

COOL DOWN HEAT EXCHANGER AND RESET APPLIANCE

ALLOW FAN OVERRUN TO COMMENCE

Next: p2556, f2557

HEAT EXCHANGER TEMP

Next: p2524, f2525

COOL HEAT EXCHANGER AND RESET APPLIANCE

ALLOW FAN OVERRUN TO COMMENCE

Next: p2539, f2540

FURTHER INVESTIGATION OVERHEAT

Next: !p2554, !f2555

FURTHER INVESTIGATION OVERHEAT

Next: !p2576, !f2577

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p3130, f2666

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2610, !f2611

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: p2612, !f2613

SENSOR FIXINGS

{ISOLATEMAINSPOWER}

Next: p2614, !f2615

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p2680, !f2617

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2624, !f2625

RESISTANCE FAN

{ISOLATEMAINSPOWER}
DISCONNECT THE FAN HARNESS FROM FAN

Next: p2626, !f2627

SENSOR FIXINGS

{ISOLATEMAINSPOWER}

Next: p2628, !f2629

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p3059, !f2631

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: !p2637, !f2639

OBSERVATION JUMPER SETTINGS MAIN AND DISPLAY PCB

{ISOLATEMAINSPOWER}
REMOVE USER DISPLAY PCB

Next: !p2643, !f2644

OBSERVATION JUMPER SETTINGS MAIN AND DISPLAY PCB

{ISOLATEMAINSPOWER}
REMOVE USER DISPLAY PCB

Next: !p2646, !f2647

OBSERVATION JUMPER SETTINGS MAIN AND DISPLAY PCB

{ISOLATEMAINSPOWER}
REMOVE USER DISPLAY PCB

Next: !p2649, !f2650

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: !p2681, !f2682

IS SYSTEM FILLED AND VENTED

{ISOLATEMAINSPOWER}

Next: p2817, !f2777

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p2785, !f2721

SYSTEM BYPASS

Next: p2812, !f2779

PUMP LIMPET

Next: p2781, !f2782

SYSTEM BYPASS

Next: !p2783, !f2784

PUMP LIMPET

Next: p2786, !f2787

SYSTEM BYPASS

Next: p2788, !f2789

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p2790, f2791

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: p2798, !f2799

PRIMARY FLUE SEAL

{ISOLATEMAINSPOWER}

Next: p2794, !f2795

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: !p2796, !f2797

PRIMARY FLUE SEAL

{ISOLATEMAINSPOWER}

Next: p2800, !f2801

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: !p2802, !f2803

DISCONNECT EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}
DISCONNECT EXTERNAL CONTROLS AND MAKE SAFE

Next: !p2806, !f3162

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p2814, !f2813

PUMP LIMPET

Next: !p2815, !f2816

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2776, !f2825

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p3095, !f2830

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p2881, !f2882

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p2883, f2884

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: !p2887, !f2888

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p2891, !f2892

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p2893, !f2894

CHECK IMPULSE TUBE

{ISOLATEMAINSPOWER}

Next: p2895, !f2896

INSPECTION FLUE

Next: p2897, !f2898

PRIMARY FLUE SEAL

{ISOLATEMAINSPOWER}

Next: p2899, !f2900

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p2901, !f2902

INSULATION PADS

{ISOLATEMAINSPOWER}
REMOVE FAN AND BURNER

Next: p2903, !f2904

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: p2905, !f2906

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: !p2907, !f2908

RESISTANCE EMC FILTER

{ISOLATEMAINSPOWER}<

Next: !p2910, !f2911

IS SYSTEM FILLED AND VENTED

{ISOLATEMAINSPOWER}

Next: p1073, !f2973

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p2977, !f2978

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p2979, f2980

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: p2997, !f2998

CH OPERATION (HEAT EXCHANGER PROVING)

BOILER MAINS SWITCH ON
BOILER CH THERMOSTAT TO MAXIMUM

Next: !p3055, !f3054

SYSTEM BYPASS

Next: p2976, !f3052

CH OPERATION (HEAT EXCHANGER PROVING)

BOILER MAINS SWITCH ON
BOILER CH THERMOSTAT TO MAXIMUM

Next: !p3057, !f3058

RESISTANCE OVERHEAT

{ISOLATEMAINSPOWER}<

Next: !p3060, !f3061

RESISTANCE CONTROL THERMISTOR FLUE

{ISOLATEMAINSPOWER}<

Next: p3097, !f3096

PUMP LIMPET

Next: p3098, !f3099

SYSTEM BYPASS

Next: p3100, !f3101

GAS RATE

Next: !p3102, f3103

BURNER INJECTOR

{ISOLATEMAINSPOWER}
REMOVE THE BURNER INJECTOR FROM ITS HOUSING

Next: p3106, !f3107

CONDENSATE TRAP AND DRAIN

{ISOLATEMAINSPOWER}<

Next: p3108, !f3109

BURNER CONDITION

{ISOLATEMAINSPOWER}
REMOVE FAN
REMOVE THE BURNER

Next: p3110, !f3111

INSPECTION PRIMARY HEAT EXCHANGER FLUEWAYS

{ISOLATEMAINSPOWER}

Next: !p3112, !f3113

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p3117, f3118

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: !p3121, !f3146

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p3132, f3133

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: !p3136, !f3137

OBSERVATION WHICH USER CONTROL IS FITTED ?

{ISOLATEMAINSPOWER}
REMOVE USER CONTROL

Next: p3139, f3140

POTENTIOMETER RESISTANCE (CH)

{ISOLATEMAINSPOWER}<

Next: !p3143, !f3144

FURTHER INVESTIGATION OVERHEAT

Next: !p3148, !f3149

FURTHER INVESTIGATION OVERHEAT

Next: !p3152, !f3153

IS SYSTEM FILLED AND VENTED

{ISOLATEMAINSPOWER}

Next: p2780, !f3160

PUMP VOLTAGE

{ISOLATEMAINSPOWER}
BOILER MAINS SWITCH ON

Next: !p3172, f3173

RESISTANCE CONTROL THERMISTOR FLOW

{ISOLATEMAINSPOWER}
REMOVE ONE OR BOTH OF THE RED LEADS FROM THE CONTROL THERMISTOR

Next: p3168, !f3169

HARNESS CHECK - THERMISTORS

{ISOLATEMAINSPOWER}

Next: !p3170, !f3171

BURNER IGNITES BUT DOES NOT ESTABLISH (FAULT CODE)

BOILER MAINS SWITCH ON
ENSURE SECONDARY HEAT EXCHANGER IS COOL AND THERE IS A DEMAND FOR PREHEAT

Next: p2382, f2472

RESISTANCE CONTROL THERMISTOR FLOW AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p670, f671

CAN SYSTEM BE RESET BY POWER OFF/ON

Next: p650, f651

CONTINUITY CHECK ON TERMINAL PINS PCB

{ISOLATEMAINSPOWER}<

Next: !p648, !f649

IS SYSTEM FILLED AND VENTED

{ISOLATEMAINSPOWER}

Next: p656, !f657

RESISTANCE CONTROL THERMISTOR FLUE AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE PLUG FROM PCB

Next: !p658, f1236

POWER TO DISPLAY BOARD

{ISOLATEMAINSPOWER}
LOWER MAIN PCB
DISCONNECT DISPLAY HARNESS FROM THE MAIN PCB

Next: p1446, !f1449

MAINS VOLTAGE TO PCB

Next: p893, f894

FUSE F1 PCB

{ISOLATEMAINSPOWER}
REMOVE FUSE F1 FROM THE CONTROL BOX

Next: p906, f2301

EMC FILTER VOLTAGE INPUT

LOCATE EMC FILTER

Next: p899, !f900

EMC FILTER VOLTAGE OUTPUT

LOCATE EMC FILTER

Next: !p901, !f902

ON/OFF SWITCH VOLTAGE OUTPUT

{ISOLATEMAINSPOWER}
BOILER MAINS SWITCH ON
REMOVE CONTROL DISPLAY UNIT

Next: p911, f907

OBSERVATION PLUG DISPLAY PCB ON TO MAIN PCB

{ISOLATEMAINSPOWER}<

Next: p1451, f1455

FLAME DETECTION ELECTRODE AND LEAD

{ISOLATEMAINSPOWER}
REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: !p960, !f961

System Information

  • Total Tests: 575
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control

XSol Diagnostic System - Generated from extracted test data