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 LOGIC SYSTEM S 24 AND VARIANTS


BOILERS COVERED

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &5, !f1228

POWER ON SELF TEST

{ALLDEMANDOFF}
SELECTOR SWITCH IN ON POSITION

Next: &2652, ?106, ?129, ?940, ?2477, ?2654

OBSERVATION FAN RUNS ON DEMAND

CH TEMPERATURE CONTROL SET TO MAX
ENSURE BOILER IS COOL
SELECTOR SWITCH SET TO OFF

Next: &284, ?960, ?962, ?2482

OPERATION CH

CH THERMOSTAT SET TO MAX

Next: &3648, ?194, ?196, ?200, ?202, ?3644

OBSERVATION BURNER IGNITES AND ESTABLISHES

ENSURE BOILER IS COOL

Next: &193, ?287, ?289, ?291, ?293

OPERATION DHW

TEMPERATURE CONTROL SET TO MAX

Next: &958, ?3654, ?3658

PUMP AND FAN OVER RUN

APPLY A DEMAND FOR HEATING OR HOT WATER

Next: &nff, ?3789, ?3791

FAULT CODES

Next: &nff, !f1086

L1

INTENTIONALLY BLANK - HEADER FOR L1 FAULT CODE

Next: &nff, f2175

F1

INTENTIONALLY BLANK - HEADER FOR F1 FAULT CODE

Next: &nff, f1137

F4 / L4

INTENTIONALLY BLANK - HEADER FOR F4/L4 FAULT CODES

Next: &nff, f1146

F5 / L5

INTENTIONALLY BLANK - HEADER FOR F5/L5 FAULT CODES

Next: &nff, f1151

FURTHER INVESTIGATION FUSES

INTENTIONALLY BLANK - HEADER FOR FUSE INVESTIGATION

Next: &nff, f1714

F7

INTENTIONALLY BLANK - HEADER FOR F7 FAULT CODE

Next: &nff, f1451

LC

INTENTIONALLY BLANK - HEADER FOR LC FAULT CODE

Next: &nff, f1455

FA

INTENTIONALLY BLANK - HEADER FOR FA FAULT CODE

Next: &nff, f1463

F2 / FN / LN

INTENTIONALLY BLANK - HEADER FOR F2/FN/LN FAULT CODES

Next: &nff, f1962

L6

INTENTIONALLY BLANK - HEADER FOR FAULT CODE L6

Next: &nff, f2160

F9 / L9 / F8 / L8

INTENTIONALLY BLANK - HEADER FOR F9/L9/F8/L8 FAULT CODES

Next: &nff, f2264

F6

INTENTIONALLY BLANK - HEADER FOR F6 FAULT CODE

Next: &nff, f2266

FU / FJ - FJ SKIPS FIRST TEST

OUTSIDE MODEL

Next: &nff, f2268

DU

INTENTIONALLY BLANK - HEADER FOR DU FAULT CODE

Next: &nff, f2270

TYPE OF DIAGNOSTIC PROCEDURE

Next: &39, !f2653

PCB COMPONENT FOR HYPERLINK

INTENTIONALLY BLANK - HEADER FOR PCB COMPONENT

Next: &nff, !f2659

HEADER FOR QUICK ACCESS DATA RETURN THERMISTOR

OUTSIDE MODEL

Next: &nff, f2782

HEADER FOR QUICK ACCESS DATA FLOW THERMISTOR

OUTSIDE MODEL

Next: &nff, f2786

HEADER FOR QUICK ACCESS DATA GAS VALVE VOLTAGE

OUTSIDE MODEL

Next: &nff, f2790

HEADER FOR QUICK ACCESS DATA GAS VALVE RESISTANCE

OUTSIDE MODEL

Next: &nff, f2794

HEADER FOR QUICK ACCESS DATA PUMP / FAN MAINS VOLTAGE

OUTSIDE MODEL

Next: &nff, f2798

HEADER FOR QUICK ACCESS DATA FAN RESISTANCE

OUTSIDE MODEL

Next: &nff, f2802

QUICK ACCESS DATA AND INFORMATION


THE TABLE BELOW

Next: &nff, !f2806

DIAGNOSTICS LITE

DIAGNOSIS RELIES ON

Next: &nff, !f2808

HEADER FOR QUICK ACCESS DATA PUMP RESISTANCE

OUTSIDE MODEL

Next: &nff, f2818

HEADER FOR QUICK ACCESS DATA FAN VOLTAGE (LOW VOLTAGE)

OUTSIDE MODEL

Next: &nff, f2822

HEADER FOR QUICK ACCESS DATA PUMP VOLTAGE (LOW VOLTAGE)

OUTSIDE MODEL

Next: &nff, f2831

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR VOLTAGE

OUTSIDE MODEL

Next: &nff, f3329

HEADER FOR QUICK ACCESS DATA SPARK GENERATOR RESISTANCE

OUTSIDE MODEL

Next: &nff, f3327

FT

HEADER FOR FAULT CODE - OUTSIDE MODEL

Next: &nff, !f3339

OBSERVATION BOILER MODULATION

ATTACH TEMPERATURE CLAMP TO FLOW PIPE ON LEFT HAND SIDE OF BOILER

Next: &633, f3649

INFORMATION OUTDOOR SENSOR AFTER AFQ INSTRUCTIONS

Next: &nff, f3849

INFORMATION HOW TO SET BOILER TO SERVICE MODE

Next: &nff, !f3855

FAULT CODES

Z DIRECTION

Next: End

F4 - FLOW SENSOR FAULT

THERMISTOR - NO FLOW

Next: End

F5 - RETURN SENSOR FAULT

CONTROL THERMISTOR

Next: End

CASE REMOVAL

Z DIRECTION

Next: End

TO FAN POWER - PUMP SHORT TIME START UP

HARNESS - MAINS INSTALLATION

Next: End

NO FAN AT START UP

PCB

Next: End

POOR VOLTAGE

Next: End

WONT RESET L5

PCB

Next: End

FAULT CODE FA

CONTROL THERMISTOR

Next: End

FAULT CODE FA

THERMISTOR - NO FLOW

Next: End

BURNER DOES NOT IGNITE

KIT - SIPHON TRAP

Next: End

VOLTAGE TO GAS VALVE

PCB

Next: End

BURNER DOES NOT IGNITE

INJECTOR

Next: End

BURNER DOES NOT IGNITE

KIT - BURNER

Next: End

BURNER DOES NOT IGNITE

KIT - HEAT ENGINE

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

NEW MODELBLOCKED OR DAMAGED

KIT - BURNER

Next: End

SPARKING BUT NO LIGHTING

KIT - HEAT ENGINE

Next: End

SPARK BUT NOT LIGHTING

FLUE

Next: End

FAN DOES NOT RUN

HARNESS - MAINS INSTALLATION

Next: End

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY

KIT - SIPHON TRAP

Next: End

BURNER BAFFLES OR NOISY

INJECTOR

Next: End

NEW MODELBLOCKED OR DAMAGED

FLUE

Next: End

MECHANICAL PHYSICAL OPERATION

KIT - FAN

Next: End

NEW MODEL FLUEWAYS

KIT - HEAT ENGINE

Next: End

IGNITES BUT BAFFLES OR NOISY

KIT - BURNER

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

PCB

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

HARNESS - MAINS INSTALLATION

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

LEAD - IGNITION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

GAS PRESSURE INLET

Next: End

BURNER IGNITES

ELECTRODE - DETECTION

Next: End

CALIBRATION LOW BOILER TEMP LOW OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

THERMISTOR - NO FLOW

Next: End

DHW COOL RADS COOL

CONTROL THERMISTOR

Next: End

F2 FAULT CODE

GAS PRESSURE INLET

Next: End

F2 FAULT CODE

ELECTRODE - DETECTION

Next: End

F2 FAULT CODE

KIT - SIPHON TRAP

Next: End

F2 FAULT CODE

INJECTOR

Next: End

DHW COOL RADS COOL

KNOB POTENTIOMETER - WHITE

Next: End

L6 FAULT CODE

ELECTRODE - DETECTION

Next: End

L6 - STICKING OPEN

GAS VALVE KIT

Next: End

L6 FAULT CODE

PCB

Next: End

L1 - OVERHEAT FAULT

THERMISTOR - NO FLOW

Next: End

L1 - OVERHEAT FAULT

CONTROL THERMISTOR

Next: End

F6

HARNESS LOW VOLTAGE

Next: End

F9

PCB

Next: End

DU

PCB

Next: End

FU - SHOWING FAULT

CONTROL THERMISTOR

Next: End

FU - SHOWING FAULT

THERMISTOR - NO FLOW

Next: End

BLOWN STAND BY MODE AT POWER UP

MAIN FUSE FUSED SPUR F1

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE - PCB

Next: End

PCB DAMAGED

PCB + LEAK OR SHORT

Next: End

POWER UP

HARNESS - MAINS INSTALLATION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

KIT - BURNER

Next: End

DOES NOT ESTABLISH

ELECTRODE - IGNITION

Next: End

BURNER IGNITES BUT DOES NOT ESTABLISH

FLUE

Next: End

F2 FAULT CODE

KIT - BURNER

Next: End

F2 FAULT CODE

KIT - HEAT ENGINE

Next: End

F2 FAULT CODE

ELECTRODE - IGNITION

Next: End

F2 FAULT CODE

FLUE

Next: End

FAN RUNS DHW DEMAND

KNOB POTENTIOMETER - WHITE

Next: End

FAN RUNS DHW

THERMISTOR - NO FLOW

Next: End

FAN RUNS DHW

CONTROL THERMISTOR

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

THERMISTOR - NO FLOW

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

CONTROL THERMISTOR

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - PUMP HEAD

Next: End

FURTHER INVESTIGATION FUSE F1

KIT - FAN

Next: End

FURTHER INVESTIGATION FUSE F1

UNIT - IGNITOR

Next: End

TO PUMP - NO POWER AT PUMP

HARNESS - MAINS INSTALLATION

Next: End

FOR TYPE DIAG PROCEDURE

Z DIRECTION

Next: End

FAULT CODES 3

Z DIRECTION

Next: End

HYPERLINK

PCB

Next: End

BURNER DOES NOT IGNITE - BAFFLES

GAS PRESSURE INLET

Next: End

OUT OF RANGE (QADAI)

CONTROL THERMISTOR

Next: End

OUT OF RANGE (QADAI)

THERMISTOR - NO FLOW

Next: End

NO POWER TO GAS VALVE (QADAI)

PCB

Next: End

RESISTANCE INCORRECT (QADAI)

KIT - FAN

Next: End

BLANK FOR QUICK ACCESS DATA AND INFORMATION

Z DIRECTION

Next: End

BLANK FOR DIAGNOSICS LITE

Z DIRECTION

Next: End

NO POWER TO GAS VALVE (QADAI)

HARNESS LOW VOLTAGE

Next: End

TO GAS VALVE - NO POWER ON IGN

HARNESS LOW VOLTAGE

Next: End

RESISTANCE INCORRECT (QADAI) PUMP

KIT - PUMP HEAD

Next: End

NO FAN AT START UP (QADAI)

PCB

Next: End

FAN RUNS DHW DEMAND - PUMP RUNNING CONTINUALLY (QADAI)

PCB

Next: End

TO FAN POWER - PUMP SHORT TIME START UP (QADAI)

HARNESS - MAINS INSTALLATION

Next: End

TO LWPS F1 - LOW WATER FAULT

HARNESS LOW VOLTAGE

Next: End

F1 - LOW WATER FAULT

SWITCH - PRESSURE - WATER

Next: End

FU - BOILER RESET

THERMISTOR - NO FLOW

Next: End

FU - BOILER RESET

CONTROL THERMISTOR

Next: End

FU / FJ TO PUMP - NO POWER AT PUMP

HARNESS - MAINS INSTALLATION

Next: End

FUFO-L3 - NO FLOW FAULT - STICKING

KIT - PUMP HEAD

Next: End

FU

PACK - CH FLOW / RETURN

Next: End

FU

Next: End

BURNERIGNITES

HARNESS - DETECTION LEAD

Next: End

F2 FAULT CODE

HARNESS - DETECTION LEAD

Next: End

L6 FAULT CODE

HARNESS - DETECTION LEAD

Next: End

L1

PACK - CH FLOW / RETURN

Next: End

L1 - OUT OF CALIB

THERMISTOR - NO FLOW

Next: End

L1 - OUT OF CALIB

CONTROL THERMISTOR

Next: End

RESISTANCE WRONG QADAI

UNIT - IGNITOR

Next: End

NO VOLTAGE TO SPARK GENERATOR (QADAI)

PCB

Next: End

FT

PCB

Next: End

L1

Next: End

FA

KIT - PUMP HEAD

Next: End

FA - NO POWER AT PUMP

HARNESS - MAINS INSTALLATION

Next: End

FIRES WITH NO DEMAND

FROST PROTECTION (INTERNAL)

Next: End

ON WITH NO DEMAND - FROST

THERMISTOR - NO FLOW

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

INJECTOR

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - SIPHON TRAP

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

KIT - FAN

Next: End

POOR GAS RATE

KIT - BURNER

Next: End

RESTRICTED OPERATION DHW DHW DOOL RADS COLD NO CH DEMAND

KIT - HEAT ENGINE

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND

FLUE

Next: End

BOILER TEMP LOW SYSTEM TEMP LOWOPERATION DHW DHW COOL RADS COOL

GAS PRESSURE INLET

Next: End

CH TEMP LOW - NO OUTDOOR SENSOR

PCB

Next: End

CH TEMP LOW

OUTDOOR SENSOR

Next: End

OPERATION CH - COOL RADS COOL LPG

GAS PRESSURE INLET

Next: End

CALIBRATION LOW BOILER TEMP LOW OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

THERMISTOR - NO FLOW

Next: End

DHW COOL RADS COOL LPG

CONTROL THERMISTOR

Next: End

CH TEMP LOW - NO OUTDOOR SENSOR LPG

PCB

Next: End

CH TEMP LOW LPG

OUTDOOR SENSOR

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

INJECTOR

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - SIPHON TRAP

Next: End

MECHANICAL OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

KIT - FAN

Next: End

POOR GAS RATE LPG

KIT - BURNER

Next: End

RESTRICTED OPERATION DHW DHW DOOL RADS COLD NO CH DEMAND LPG

KIT - HEAT ENGINE

Next: End

RESTRICTED OPERATION DHW DHW COOL RADS COLD NO CH DEMAND LPG

FLUE

Next: End

DHW OPERATION BOILER NOISY

THERMISTOR - NO FLOW

Next: End

DHW OPERATION BOILER NOISY

CONTROL THERMISTOR

Next: End

DHW OPERATION BOILER NOISY

KIT - PUMP HEAD

Next: End

DHW NOISEY KETTLING

KIT - SIPHON TRAP

Next: End

DHW NOISY KETTLING

INTERNAL BYPASS

Next: End

BOILER TO TEMP RADS COOL

KIT - PUMP HEAD

Next: End

OPERATION CH UP TO TEMP RADS COOL

PACK - CH FLOW / RETURN

Next: End

OPERATION CH UP TO TEMP RADS COOL

Next: End

OPERATION CH - UP TO TEMP RADS DO NOT HEAT

INTERNAL BYPASS

Next: End

UNDER PRESSURE

KIT - EXPANSION VESSEL

Next: End

OBSERVATION BOILER MODULATION

THERMISTOR - NO FLOW

Next: End

OBSERVATION BOILER MODULATION

CONTROL THERMISTOR

Next: End

L1 - NO POWER TO PUMP

HARNESS - MAINS INSTALLATION

Next: End

L1 RUNNING SLOW

KIT - PUMP HEAD

Next: End

L1

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

FU / FJ

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

OBSERVATION FAN RUNS - OPEN CIRCUIT TO OPENTHERM

HARNESS LOW VOLTAGE

Next: End

FAN RUNS DHW DEMAND - NO FAN

PCB

Next: End

OBSERVATION PUMP & FAN RUNS - FAN DOES NOT RUN REMEDIAL KIT

OUTDOOR SENSOR

Next: End

NOT RESPONDING TO HEATING 2

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING

OUTDOOR SENSOR

Next: End

DHW OPERATION

Next: End

OPERATION DHW POOR OPERATION

CYLINDER THERMOSTAT

Next: End

OPERATION DHW POOR OPERATION

TIMER

Next: End

DHW OPERATION

Next: End

OPERATION DHW NO DEMAND

CYLINDER THERMOSTAT

Next: End

OPERATION DHW NO DEMAND

TIMER

Next: End

DHW OPERATION WEATHER COMP

Next: End

PUMP AND FAN DO NOT RUN ON STARTUP

PCB

Next: End

OBSERVATION FAN RUNS - EXT CONTROLS

HARNESS - MAINS INSTALLATION

Next: End

OBSERVATION SELF CHECK - PUMP DOES NOT RUN

PCB

Next: End

OBSERVATION SELF CHECK - PUMP DOES NOT RUN

HARNESS - MAINS INSTALLATION

Next: End

FAN RUNS DHW DEMAND - PUMP RUNNING CONTINUALLY

PCB

Next: End

FAN RUNS DHW DEMAND - PUMP RUNNING CONTINUALLY

HARNESS LOW VOLTAGE

Next: End

FIRING NO DEMAND - NO WEATHER COMP

Next: End

POWER UP - FIRING NO DEMAND

Next: End

OPERATION DHW NO DEMAND FIRING NO DEMAND

TIMER

Next: End

OUTDOOR REMEDIAL 2

Z DIRECTION

Next: End

OUTDOOR REMEDIAL 3

Z DIRECTION

Next: End

INFORMATION HOW TO SET BOILER TO SERVICE MODE

Z DIRECTION

Next: End

TO SPARK GEN - NO SPARK

HARNESS - MAINS INSTALLATION

Next: End

NOT SPARKING

LEAD - IGNITION

Next: End

NO FAN AT START UP

HARNESS LOW VOLTAGE

Next: End

HOT WATER TOO HOT

CONTROL THERMISTOR

Next: End

HOT WATER TOO HOT

THERMISTOR - NO FLOW

Next: End

TO FLOW SENSOR F4 - FLOW SENSOR FAULT

HARNESS LOW VOLTAGE

Next: End

F4 - FLOW SENSOR FAULT

PCB

Next: End

TO RETURN SENSOR F5 - RETURN SENSOR FAULT

HARNESS LOW VOLTAGE

Next: End

F5 - RETURN SENSOR FAULT

PCB

Next: End

NO MAINS TO FAN AT START UP

PCB

Next: End

ELECTRICAL OVER 15V ON N

KIT - FAN

Next: End

FALSE LOW VOLTAGE

PCB

Next: End

L5 - RESTART FAULT CODES

Z DIRECTION

Next: End

FAULT CODE FA

HARNESS LOW VOLTAGE

Next: End

FAULT CODE FA - FLOW SENSOR

HARNESS LOW VOLTAGE

Next: End

FAULT CODE FA

PCB

Next: End

POOR SUPPLY

GAS PRESSURE INLET

Next: End

SPARK BUT NOT LIGHTING

GAS VALVE KIT

Next: End

SPARKING BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

SPARK BUT NOT LIGHTING

ELECTRODE - IGNITION

Next: End

BURNER DOES NOT IGNITE

GAS VALVE KIT

Next: End

NO FAN AT START UP

KIT - FAN

Next: End

IGNITES BUT BAFLLES OR NOISY

GAS VALVE KIT

Next: End

SPARKING OCCURS BURNER DOES NOT IGNITE

UNIT - IGNITOR

Next: End

BLANK FOR L6 FAULT CODE RESET

Z DIRECTION

Next: End

F6

PCB

Next: End

F6

OUTDOOR SENSOR

Next: End

F9

PCB INITIAL SETUP

Next: End

DU

Z DIRECTION

Next: End

FU

PCB

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION

Next: End

POWER OK PCB DEAD

PCB

Next: End

INTEGRAL FUSE FATIGUED

PCB

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

PCB

Next: End

F2 FAULT CODE

PCB

Next: End

FAN DOES NOT RUN DHW

PCB

Next: End

BURNER IGNITES AND ESTABLISHES - NO SPARKING

PCB

Next: End

L1 - STUCK IN FAULT

PCB

Next: End

TO FAN - FURTHER INVESTIGATION FUSE F1

HARNESS - MAINS INSTALLATION

Next: End

TO SPARK GEN - FURTHER INVESTIGATION FUSE F1

HARNESS - MAINS INSTALLATION

Next: End

DHW DEMAND STOPS QUICKLY

KIT - PUMP HEAD

Next: End

NOT OPENING - MECHANICAL

GAS VALVE KIT

Next: End

FAULT CODES 2

Z DIRECTION

Next: End

BURNER DOES NOT IGNITELEAKING POC

KIT - REPLACEMENT - SUMP & COVER

Next: End

BURNER DOES NOT IGNITELEAKING POC

MANIFOLD - FLUE

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

FLOW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE SATISFACTORY

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN SATISFACTORY

RESULT AS EXPECTED

Next: End

RESISTANCE WRONG (QADAI)

GAS VALVE KIT

Next: End

PUMP SATISFACTORY

RESULT AS EXPECTED

Next: End

FAN VOLTAGE OK (LV)

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE (LV)

RESULT AS EXPECTED

Next: End

NO MAINS TO FAN AT START UP (QADAI)

PCB

Next: End

ELECTRICAL OVER 15V ON N (QADAI)

KIT - FAN

Next: End

OPERATION DHW DHW COOL RADS COOL

PRESSURE GAUGE

Next: End

OPERATION DHW NOISY

PRESSURE GAUGE

Next: End

OPERATION DHW NOISY

SYSTEM PRESSURE

Next: End

OPERATION DHW DHW COOL RADS COOL

SYSTEM PRESSURE

Next: End

OPERATION DHW RUNS HOT COLD

PRESSURE GAUGE

Next: End

OPERATION DHW RUNS HOT COLD

SYSTEM PRESSURE

Next: End

F1 FAULT CODE

PRESSURE GAUGE

Next: End

F1 - LOW WATER FAULT

SYSTEM PRESSURE

Next: End

F1 - LOW WATER FAULT

PCB

Next: End

F1 - LOW WATER FAULT

SWITCH - PRESSURE - WATER (BLOCKED)

Next: End

FU

PRESSURE GAUGE

Next: End

FU

SYSTEM PRESSURE

Next: End

FU / FJ PUMP

PCB

Next: End

FU / FJ - NOT RUNNING

KIT - PUMP HEAD

Next: End

FU

NO FAULT - FU / FJ

Next: End

L3 NO WATER FLOW

PRESSURE GAUGE

Next: End

FAULT CODE L3

SYSTEM PRESSURE

Next: End

BURNER IGNITES AND ESTABLISHES - FLAME SENSE

HARNESS - MAINS INSTALLATION

Next: End

F2 FAULT CODE - FLAME SENSE

HARNESS - MAINS INSTALLATION

Next: End

L6 FAULT CODE - FLAME SENSE

HARNESS - MAINS INSTALLATION

Next: End

SPARK GENERATOR RESISTANCE

RESULT AS EXPECTED

Next: End

SPARK GENERATOR VOLTAGE

RESULT AS EXPECTED

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

MANIFOLD - FLUE

Next: End

BURNER DOES NOT IGNITELEAKING POCBAFFLES

KIT - REPLACEMENT - SUMP & COVER

Next: End

FA PUMP

PCB

Next: End

FA - NOT RUNNING

KIT - PUMP HEAD

Next: End

POWER UP - FIRING WITH NO FROST DEMAND

PCB

Next: End

FAN RUNS CH DEMAND 1

Next: End

DHW COOL RADS COOL

PCB

Next: End

DHW COOL RADS COOL LPG

PCB

Next: End

DHW NOISY KETTLING

KIT - HEAT ENGINE

Next: End

EXPANSION CONNECTION

KIT - PIPE - EXPANSION VESSEL

Next: End

OBSERVATION BOILER MODULATION

PCB

Next: End

LOW SYSTEM TEMP POT

PCB

Next: End

OPERATION CH - UP TO TEMP RADS DO NOT HEAT

SYSTEM RESTRICTION OR BLOCKAGE

Next: End

L1 - NO PUMP

PCB

Next: End

L1 - NOT RUNNING

KIT - PUMP HEAD

Next: End

ALL CHECKS OK RETEST MODEL

NO FAULT - OVERHEAT / L1

Next: End

LEAKING POC

KIT - REPLACEMENT - SUMP & COVER

Next: End

LEAKING POC

MANIFOLD - FLUE

Next: End

L1 - DOES NOT SHUT OFF

PCB

Next: End

L1 - FAULT CODE REOCCURS

PCB

Next: End

L1 - REOCCURS

KIT - REPLACEMENT - SUMP & COVER

Next: End

L1 - REOCCURS

MANIFOLD - FLUE

Next: End

FUSE INVESTIGATION

NO FAULT - FUSE INVESTIGATION

Next: End

OBSERVATION PUMP & FAN RUNS - NO FAN - OUTDOOR SENSOR REMEDIAL

PCB

Next: End

OBSERVATION PUMP FAN RUNS - NOT RESPONDING - WEATHER COMP

PCB

Next: End

DHW OPERATION 2

Next: End

OPERATION DHW POOR OPERATION

WIRING FAULT

Next: End

OPERATION DHW NO DEMAND

WIRING FAULT

Next: End

OPERATION DHW IGNORING SL2

PCB

Next: End

OBSERVATION SELF CHECK - NEITHER PUMP FAN RUN

HARNESS - MAINS INSTALLATION

Next: End

OBSERVATION SELF CHECK - PUMP SPEED CONTROL

PCB

Next: End

OBSERVATION SELF CHECK

KIT - PUMP HEAD

Next: End

NO OVERRUNS

PCB

Next: End

FAN RUNS DHW DEMAND - PUMP RUNNING CONTINUALLY

KIT - PUMP HEAD

Next: End

FIRING NO DEMAND - NO WEATHER COMP

PCB

Next: End

OPERATION DHW IGNORING SL2 FIRING NO DEMAND

PCB

Next: End

OPERATION DHW NO DEMAND FIRING NO DEMAND

WIRING FAULT

Next: End

OUTDOOR SENSOR REMEDIAL

Z DIRECTION

Next: End

NO SPARKING

UNIT - IGNITOR

Next: End

POOR CONDITION - NO SPARK

ELECTRODE - IGNITION

Next: End

DHW TOO HOT

PCB

Next: End

PUMP SU FAN RUNS SPARKING DOES NOT OCCURTEMP

PCB

Next: End

NO DISPLAY SEEN

CHARACTERISTIC TEST FROM POWER UP

Next: p2364

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1230

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p1233

FAN OR PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM POWER UP

Next: p3747

INLET PRESSURE DOES NOT CHANGE

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: p1561

INLET PRESSURE DROPS AWAY

CHARACTERISTIC TEST FROM PRESSURE GAS INLET (BLIP TEST)

Next: !p1563

SPARK ELECTRODE IN POOR CONDITION

CHARACTERISTIC TEST FROM INSPECTION ELECTRODE SPARK GAP

Next: !p1583

SPARK GAP INCORRECT

CHARACTERISTIC TEST FROM INSPECTION ELECTRODE SPARK GAP

Next: !p1585

RADIATORS TOO HOT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p571

BOILER REMAINS LIT BUT RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p2873

BOILER NOISY KETTLING

CHARACTERISTIC TEST FROM OPERATION CH

Next: p2924

BOILER REACHES TEMPERATURE BUT SYSTEM DOES NOT HEAT

CHARACTERISTIC TEST FROM OPERATION CH

Next: p2962

DISPLAY SHOWS - - TWO DASHES

CHARACTERISTIC TEST FROM POWER UP

Next: p2479

DISPLAY REMAINS ON 00

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON DEMAND

Next: p3496

FAULT CODE DISPLAYED

CHARACTERISTIC TEST FROM POWER UP

Next: p2655

SUMP UNSATISFACTORY

Next: !p2765

FLUE MANIFOLD UNSATISFACTORY

Next: !p2767

NO VOLTAGE MEASURED

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p2838

GREATER THAN 15VAC ON BLUE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p2844

FAN RUNS SPARKING DOES NOT OCCUR

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p494

FAN RUNS SPARKING OCCURS BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1763

BURNER IGNITES BUT DOES NOT ESTABLISH - RECTIFICATION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1841

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

Next: !p2921

BURNER IGNITES BUT BAFFLES OUT OR IS NOISY - COMBUSTION ISSUE

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITES AND ESTABLISHES

Next: p1678

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p2961

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

Next: !p2957

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p2960

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

Next: !p2977

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p2979

SYSTEM PRESSURE OK BUT DOES NOT INCREASE

Next: !p2988

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p2990

SYSTEM PRESSURE OK BUT GAUGE DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3002

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3004

SYSTEM PRESSURE OK BUT GAUGE DOES NOT INCREASE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3034

SYSTEM PRESSURE LOW

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE AND RISE

Next: !p3036

FLUE MANIFOLD UNSATISFACTORY

Next: !p3420

SUMP UNSATISFACTORY

Next: !p3422

GAS RATE LOW

Next: p3571

UNABLE TO GAS RATE (EG LPG)

Next: p3557

SYSTEM PRESSURE RISE EXCESSIVE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3645

DHW OPERATION UNSATISFACTORY

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3727

DHW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3736

SUMP UNSATISFACTORY

Next: !p3687

FLUE MANIFOLD UNSATISFACTORY

Next: !p3689

FLOW TEMP EXCEEDS 80 °C BUT BOILER DOES NOT MODULATE / SHUT OFF

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: !p3698

BOILER GOES TO OVERHEAT BEFORE REACHING TEMPERATURE

CHARACTERISTIC TEST FROM OBSERVATION BOILER MODULATION (OVERHEAT)

Next: p3700

SUMP UNSATISFACTORY

Next: !p3704

FLUE MANIFOLD UNSATISFACTORY

Next: !p3706

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN OR PUMP NOT RUNNING

Next: p3781

NEITHER THE FAN OR THE PUMP RUNNING

CHARACTERISTIC TEST FROM OBSERVATION FAN OR PUMP NOT RUNNING

Next: p3765

PUMP OR FAN DOES NOT OVERRUN FOR LONG ENOUGH

CHARACTERISTIC TEST FROM PUMP AND FAN OVER RUN

Next: !p3790

PUMP CONTINUES TO RUN AFTER OVERRUN PERIOD

CHARACTERISTIC TEST FROM PUMP AND FAN OVER RUN

Next: p3795

BOILER FIRES WITH NO HEATING OR HOT WATER DEMAND

CHARACTERISTIC TEST FROM POWER UP

Next: p2403

DISPLAY CHANGES TO FLOW TEMPERATURE BUT PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON DEMAND

Next: p2553

DISPLAY CHANGES TO FLOW TEMPERATURE BUT FAN NEVER PAUSES

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS ON DEMAND

Next: p2487

25/08/2023 14:35:19 2211_3_50_2 29/11/2023 12:25:41

29/08/2023 07:43:36

Next: End

INSPECTION SYSTEM PRESSURE AND RISE

Next: p2992, ?2987, ?2989

RESISTANCE SENSOR NO FLOW / PRIMARY AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1150, f1147

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: !p1148, !f1149

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1155, f1152

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p1153, !f1154

VOLTAGE MAINS POWER SUPPLY AT TERMINAL BLOCK (LOW VOLTAGE)

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK (USE INSULATION MAT AS NECESSARY)

Next: !p1452, !f1453

POWER OFF RESET BOILER

WAIT APPROXIMATELY 15 SECONDS

Next: !p1457, !f1456

OBSERVATION PUMP RUNS

Next: p3440, f3452

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p1468, !f1469

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: !p1478, !f1479

RESISTANCE FAN / PUMP AND HARNESS

REMOVE CONNECTOR X1 FROM THE PCB

Next: p2548, f2514

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: p1801, !f1802

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1963, !f1964

RESISTANCE ELECTRODE SENSE HARNESS

DISCONNECT FLAME SENSE LEAD FROM THE ELECTRODE
REMOVE CONNECTOR X2 FROM THE PCB

Next: p2161, f2853

RESET BOILER

ENSURE BOILER IS COOL AND NO DEMANDS ARE PRESENT

Next: p2176, f2177

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p2178, !f2179

INFORMATION PCB SETUP

Next: !p2275, !f2276

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT WIRE MARK

Next: !p2271, f2272

OBSERVATION IS BOILER SHOWING FU

ENSURE BOILER IS COOL

Next: p2285, f2280

INFORMATION SERVICE MODE

Next: !p2277, !f2278

RESISTANCE HARNESS OUTDOOR SENSOR

DISCONNECT X8 FROM THE PCB

Next: !p2273, !f2274

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p2281, !f2282

RESISTANCE FUSE F1 (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p2367, f2368

3AMP FUSE FAULTY

Next: !p2369, !f2370

PCB FUSE FAULTY

Next: !p2373, !f2374

INFORMATION INTEGRAL FUSE

Next: !p2377, !f2378

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p2500, !f2501

RESISTANCE PUMP

UNPLUG THE MAINS HARNESS (LEFT HAND SIDE) FROM THE PUMP

Next: p2545, !f2516

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p2551, !f2552

RESISTANCE HARNESS PUMP

DISCONNECT MAINS VOL

Next: !p2562, !f2563

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2575, !f2812

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p2783, !f2784

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: !p2787, !f2788

VOLTAGE GAS VALVE AT PCB

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p2791, !f2792

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: !p2795, f2809

VOLTAGE FAN / PUMP AT PCB (QADAI)

GAIN ACCESS TO PCB (

Next: !p2799, ?2837, ?2843

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p2803, !f2804

RESISTANCE HARNESS GAS VALVE

REMOVE CONNECTOR FROM GAS VALVE
PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2810, !f2811

RESISTANCE PUMP

UNPLUG THE MAINS HARNESS (LEFT HAND SIDE) FROM THE PUMP

Next: !p2819, !f2820

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL

Next: !p2829, !f2824

VOLTAGE PUMP SPEED CONTROL

DISCONNECT PUMP SPEE

Next: !p2836, !f2833

RESISTANCE ELECTRODE SENSE HARNESS CONNECTOR

DISCONNECT FLAME SEN

Next: !p3086, !f3085

RESISTANCE ELECTRODE SENSE HARNESS CONNECTOR

DISCONNECT FLAME SEN

Next: !p3087, !f3088

RESISTANCE ELECTRODE SENSE HARNESS CONNECTOR

DISCONNECT FLAME SEN

Next: !p3089, !f3090

RESISTANCE LOW WATER PRESSURE SWITCH

DISCONNECT WIRES FROM LOW WATER PRESSURE SWITCH

Next: p2995, !f2996

OBSERVATION DISCONNECT PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AND MAKE SAFE

Next: !p3013, f3014

RESISTANCE HARNESS PUMP

DISCONNECT MAINS VOL

Next: !p3015, !f3016

RESISTANCE SPARK GENERATOR

REMOVE THE MAINS CONNECTOR FROM THE SPARK GENERATOR

Next: !p3331, !f3332

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: !p3333, !f3334

OBSERVATION DISCONNECT PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AND MAKE SAFE

Next: !p3453, f3454

RESISTANCE HARNESS PUMP

DISCONNECT MAINS VOL

Next: !p3455, !f3456

OBSERVATION AMBIENT TEMPERATURE

Next: p3458, !f3459

RESISTANCE BYPASSED EXTERNAL CONTROLS AND HARNESS

DISCONNECT X2 FROM THE PCB
PULL X1 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p3713, !f3768

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p3650, !f3651

OBSERVATION DISCONNECT PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AND MAKE SAFE

Next: !p3672, f3673

RESISTANCE HARNESS PUMP

DISCONNECT MAINS VOL

Next: !p3674, !f3675

RESISTANCE CYLINDER THERMOSTAT

DISCONNECT THE COMMON WIRE FROM THE THERMOSTAT
TURN CYLINDER THERMOSTAT TO ITS MAX SETTING

Next: p3732, !f3733

RESISTANCE CYLINDER THERMOSTAT

DISCONNECT THE COMMON WIRE FROM THE THERMOSTAT
TURN CYLINDER THERMOSTAT TO ITS MAX SETTING

Next: p3741, !f3742

RESISTANCE HARNESS PUMP

DISCONNECT MAINS VOL

Next: !p3786, !f3787

OBSERVATION DISCONNECT OPENTHERM

REMOVE PLUG MARKED "OPENTHERM | WEATHER COMPENSATION" AND MAKE SAFE

Next: !p3833, !f3834

VOLTAGE SWITCH LIVE 2 FOR DHW (HW OFF LINKED)

CONNECT A WIRE LINK

Next: !p3847, !f3848

INFORMATION S PLAN WIRING DIAGRAM

Next: p3850, !f3851

VOLTAGE SPARK GENERATOR INPUT (AT PCB)

GAIN ACCESS TO PCB (

Next: p496, f2499

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1236, !f1235

VOLTAGE FAN (AT PCB) - MAINS

GAIN ACCESS TO PCB (

Next: p133, ?1229, ?1231

VOLTAGE FAN CONTROL (AT PCB)

REMOVE DC ELECTRICAL

Next: p134, !f137

RESISTANCE HARNESS FAN CONTROL

REMOVE LOW VOLTAGE CONNECTOR FROM FAN
PULL X5 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p1675, !f852

RESISTANCE SENSOR RETURN AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: p1465, f1467

RESISTANCE SENSOR NO FLOW / PRIMARY AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p1480, f1477

INSPECTION CONDENSATE

Next: p1556, !f1557

PRESSURE GAS INLET (BLIP TEST)

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2749, ?1560, ?1562

INSPECTION BURNER

REMOVE THE BURNER

Next: p1578, !f1579

VOLTAGE GAS VALVE AT PCB

PULL CONNECTOR X3 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: p1564, !f1565

RESISTANCE GAS VALVE AND HARNESS

REMOVE CONNECTOR X3 FROM THE PCB

Next: p1568, f2574

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p1570, !f1571

INSPECTION BURNER

REMOVE THE BURNER

Next: p1572, !f1573

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1574, !f1575

INSPECTION FLUE

Next: !p1576, !f1577

INSPECTION ELECTRODE SPARK GAP

CAREFULLY REMOVE BURNER FROM BOILER

Next: p1580, ?1582, ?1584

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1586, !f1587

INSPECTION FLUE

Next: !p1588, !f1589

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p1676, !f1677

INSPECTION CONDENSATE

Next: p2768, !f1680

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p1683, !f1684

INSPECTION FLUE

Next: p1685, !f1686

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3413, !f1688

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p1689, !f1690

INSPECTION BURNER

REMOVE THE BURNER

Next: !p1691, !f1692

INSPECTION SPARK OUTPUT

REMOVE THE HT LEAD F

Next: p1555, f1800

RESISTANCE HARNESS SPARK GENERATOR INPUT

REMOVE CONNECTOR FROM SPARK GENERATOR
PULL X1 AND X2 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p1803, !f1804

RESISTANCE ELECTRODE SPARK HARNESS

DISCONNECT BOTH ENDS OF THE SPARK (HT) LEAD

Next: !p1805, !f1806

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1842, !f1843

RESISTANCE ELECTRODE SENSE HARNESS

DISCONNECT FLAME SENSE LEAD FROM THE ELECTRODE
REMOVE CONNECTOR X2 FROM THE PCB

Next: p1844, f2847

INSPECT FLAME DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2454, !f1847

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p1855, !f1856

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3588, !f1858

RESISTANCE ELECTRODE SENSE HARNESS

DISCONNECT FLAME SENSE LEAD FROM THE ELECTRODE
REMOVE CONNECTOR X2 FROM THE PCB

Next: p1965, f2850

INSPECT FLAME DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p1967, !f1968

INSPECTION CONDENSATE

Next: p1969, !f1970

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p2468, !f1972

INSPECTION CH CONTROL KNOB

Next: p3501, !f2125

INSPECT FLAME DETECTION ELECTRODE

REMOVE FLAME DETECTION ELECTRODE FROM ITS HOUSING

Next: p2163, !f2164

TIGHTNESS TEST INSTALLATION

Next: p2165, !f2166

OBSERVATION FAULT CODE RESET (L6)

Next: !p2167, !f2168

INSPECTION SYSTEM PRESSURE AND RISE

Next: p3038, ?3033, ?3035

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p2504, !f2181

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: !p2283, !f2284

INSPECTION SYSTEM PRESSURE AND RISE

Next: p3006, ?3001, ?3003

VOLTAGE MAINS POWER SUPPLY AT TERMINAL BLOCK

GAIN ACCESS TO INCOMING MAINS TERMINAL BLOCK (USE INSULATION MAT AS NECESSARY)

Next: p2392, f2366

RESISTANCE FUSE F2 (APPLIANCE)

Next: p2371, f2372

RESISTANCE PCB INTEGRAL FUSE

Next: !p2375, f2376

VOLTAGE MAINS POWER SUPPLY AT PCB

GAIN ACCESS TO PCB (

Next: p2365, !f2402

OBSERVATION WHICH DEMAND IS SHOWING

Next: p3822, f3457

OBSERVATION DISCONNECT OPENTHERM (WEATHER COMP FITTED)

REMOVE THE WIRES (OR LINK) AT TERMINALS MARKED "OPENTHERM"

Next: p3844, !f3843

INSPECTION BURNER

REMOVE THE BURNER

Next: p2455, !f2456

INSPECTION SPARK ELECTRODE

REMOVE THE BURNER FROM THE BOILER

Next: p2457, !f2458

INSPECTION FLUE

Next: !p2459, !f2460

INSPECTION BURNER

REMOVE THE BURNER

Next: p2469, !f2470

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p2471, !f2472

INSPECTION SPARK ELECTRODE

REMOVE THE BURNER FROM THE BOILER

Next: p2473, !f2474

INSPECTION FLUE

Next: !p2475, !f2476

INSPECTION SELECTOR SWITCH KNOB

Next: !p2480, !f2481

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p2488, !f2489

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3717, !f2491

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p2502, !f2503

RESISTANCE FAN

DISCONNECT THE 3 PIN POWER CONNECTOR FROM THE FAN

Next: !p2546, !f2547

RESISTANCE HARNESS AND SPARK GENERATOR

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p3712, f2550

OBSERVATION DISCONNECT PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AND MAKE SAFE

Next: !p981, f2561

FAULT CODES

Next: !p2656, !f2657

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1558, ?2764, ?2766

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p1679, !f2780

RESISTANCE HARNESS FAN POWER

DISCONNECT MAINS VOLTAGE PLUG FROM FAN
PULL X1 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: !p2845, !f2846

INSPECTION SYSTEM PRESSURE AND RISE

Next: p2068, ?2920, ?2953

INSPECTION SYSTEM PRESSURE AND RISE

Next: p3617, ?2955, ?2958

INSPECTION SYSTEM PRESSURE AND RISE

Next: p3633, ?2976, ?2978

RESISTANCE LOW WATER PRESSURE SWITCH AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X6 FROM PCB

Next: !p2993, f2994

INSPECT LOW WATER PRESSURE SENSOR (BLOCKAGE)

ISOLATE BOILER FROM THE HEATING CIRCUIT AND DRAIN BOILER
REMOVE LOW WATER PRESSURE SENSOR

Next: !p2997, !f2998

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p3007, !f3008

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3009, !f3010

OBSERVATION PUMP RUNS

Next: p3011, f3012

PUMP LIMPET TEST

Next: p3017, !f3018

INSPECTION ISOLATION VALVE FLOW AND RETURN

Next: p3019, !f3020

INSPECTION EXTERNAL BYPASS

Next: p3021, !f3022

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTR

Next: !p3023, !f3709

INSPECTION ISOLATION VALVE FLOW AND RETURN

Next: p3342, !f3197

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p3041, !f3198

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3669, !f3199

INSPECTION EXTERNAL BYPASS

Next: p3039, !f3412

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: p1687, ?3419, ?3421

PUMP LIMPET TEST

Next: p1464, !f3451

RESISTANCE SENSOR NO FLOW / PRIMARY AND HARNESS

GAIN ACCESS TO PCB
DISCONNECT PLUG X7 FROM PCB

Next: !p3460, !f3461

BYPASS EXTERNAL CONTROLS

PLACE A WIRE LINK BE

Next: !p3497, f3498

GAS RATE

Next: p1854, ?3554, ?3556

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3594, !f3593

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3559, !f3560

INSPECTION CONDENSATE

Next: p3561, !f3562

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3563, !f3564

INSPECTION BURNER

REMOVE THE BURNER

Next: p3565, !f3566

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p3567, !f3568

INSPECTION FLUE

Next: !p3569, !f3570

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3558, !f3585

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3589, !f3590

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT WIRE MARK

Next: !p3660, !f3592

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p3595, !f3596

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3597, !f3598

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3599, !f3600

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT WIRE MARK

Next: p3603, !f3602

INSPECTION INJECTOR

REMOVE GAS INJECTOR FROM THE FAN VENTURI

Next: p3604, !f3605

INSPECTION CONDENSATE

Next: p3606, !f3607

INSPECTION FAN MECHANICAL

REMOVE THE FAN

Next: p3608, !f3609

INSPECTION BURNER

REMOVE THE BURNER

Next: p3610, !f3611

INSPECTION HEAT EXCHANGER PRIMARY (FLUE WAYS)

REMOVE THE BURNER FROM THE BOILER

Next: p3612, !f3613

INSPECTION FLUE

Next: !p3614, !f3615

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p3618, !f3619

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: p3620, !f3621

PUMP LIMPET TEST

Next: p3625, !f3623

INSPECTION CONDENSATE

Next: p3626, !f3627

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3630, !f3629

PUMP LIMPET TEST

Next: p3634, !f3635

INSPECTION ISOLATION VALVE FLOW AND RETURN

Next: p3636, !f3637

INSPECTION EXTERNAL BYPASS

Next: p3640, !f3638

INSPECTION INTERNAL BYPASS

DRAIN BOILER PRIMARY CIRCUIT
TWIST AND LIFT / PRISE OUT INTERNAL BYPASS

Next: !p3668, !f3642

EXPANSION VESSEL PRESSURE

SYSTEM PRESSURE DISCHARGED

Next: !p3646, !f3647

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p3652, !f3653

OBSERVATION PUMP RUNS

Next: p3670, f3671

PUMP LIMPET TEST

Next: p3676, !f3677

TEMPERATURE DIFFERENTIAL FLOW & RETURN

CH TEMPERATURE CONTR

Next: p3690, !f3707

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p3684, ?3686, ?3688

OBSERVATION BOILER MODULATION (OVERHEAT)

ATTACH TEMPERATURE CLAMP TO FLOW PIPE ON LEFT HAND SIDE OF BOILER

Next: p3678, ?3697, ?3699

INSPECTION SUMP AND FLUE MANIFOLD

REMOVE SUMP INSPECTION COVER

Next: !p3701, ?3703, ?3705

RESISTANCE OPENTHERM LINK AND HARNESS

DISCONNECT PLUG X8 FROM PCB
ENSURE LINK ON "OPENTHERM" TERMINALS IS STILL FITTED

Next: p3722, !f3715

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3718, !f3719

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT WIRE MARK

Next: !p3720, !f3721

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3723, !f3724

OBSERVATION DISCONNECT OUTDOOR SENSOR

DISCONNECT WIRE MARK

Next: !p3725, !f3726

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3728, !f3729

VOLTAGE SWITCH LIVE 2 FOR DHW

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: !p3730, f3731

VOLTAGE SWITCH LIVE 2 FOR DHW (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p3734, !f3735

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p3737, !f3738

VOLTAGE SWITCH LIVE 2 FOR DHW

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: p3739, f3740

VOLTAGE EXTERNAL CONTROLS (DHW DEMAND)

Next: !p3745, !f3746

VOLTAGE SWITCH LIVE 2 FOR DHW (HW OFF ISOLATED)

DISCONNECT HW OFF WI

Next: !p3743, !f3744

OBSERVATION FAN OR PUMP NOT RUNNING

Next: p130, ?3762, ?3764

VOLTAGE FAN / PUMP AT PCB

GAIN ACCESS TO PCB (

Next: !p3766, !f3767

VOLTAGE FAN / PUMP AT PCB

GAIN ACCESS TO PCB (

Next: p3782, !f3783

OBSERVATION DISCONNECT PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AND MAKE SAFE

Next: !p3784, f3785

VOLTAGE PUMP SPEED CONTROL

DISCONNECT PUMP SPEE

Next: p3796, !f3797

RESISTANCE HARNESS PUMP SPEED CONTROL

DISCONNECT PUMP SPEED CONTROL AT PUMP
PULL CONNECTOR X5 BACK SLIGHTLY TO EXPOSE TEST POINTS

Next: !p3798, !f3799

OBSERVATION IS WEATHER COMPENSATION FITTED

Next: p2434, f3832

VOLTAGE SWITCH LIVE 2 FOR DHW (NO DEMAND)

GAIN ACCESS TO PCB (USE INSULATION MAT AS REQUIRED)

Next: !p3845, f3846

INFORMATION Y PLAN WIRING DIAGRAM

Next: !p3852, !f3853

INSPECTION SPARK OUTPUT

REMOVE THE HT LEAD F

Next: !p509, f495

RESISTANCE HARNESS SPARK GENERATOR INPUT

REMOVE CONNECTOR FROM SPARK GENERATOR
PULL X1 AND X2 BACK SLIGHTLY TO EXPOSE TEST PINS

Next: p505, !f502

RESISTANCE ELECTRODE SPARK HARNESS

DISCONNECT BOTH ENDS OF THE SPARK (HT) LEAD

Next: !p506, !f507

RESISTANCE SENSOR NO FLOW / PRIMARY

REMOVE THE ELECTRICAL CONNECTOR FROM THE NO FLOW / PRIMARY SENSOR ATTACHED TO THE HEAT EXCHANGER

Next: p838, !f998

RESISTANCE SENSOR RETURN

REMOVE CONNECTOR FROM RETURN SENSOR

Next: !p572, !f997

System Information

  • Total Tests: 604
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control