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:

BAXI COMBI HE PLUS

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

CASE OFF

Next: &2813, !f2

OBSERVATION SPARKING PRESENT

Next: &74, f2932

OBSERVATION BURNER IGNITION AND ESTABLISH

Next: &2982, ?75, ?77, ?79, ?1911

OPERATION CH

CLICK Next: &nff, ?118, ?124, ?2928

DIAGNOSTIC OPTION

Next: &2882, !f588

HEADER FOR REVERSED POLARITY FAULT

HEADER FOR REVERSED POLARITY FAULT CODE - OUTSIDE MODEL

Next: &nff, f613

HEADER FOR PCB FAULT

HEADER FOR PCB FAULT CODES - OUTSIDE MODEL

Next: &nff, !f632

HEADER FOR INSUFFICIENT VOLTAGE FAULT

HEADER FOR INSUFFICIENT VOLTAGE FAULT CODE - OUTSIDE MODEL

Next: &nff, f3532

HEADER FOR LOW VOLTAGE HARNESS FAULT

HEADER FOR LOW VOLTAGE HARNESS FAULT CODE - OUTSIDE MODEL

Next: &nff, f1499

OBSERVATION FAN RUNS

ENSURE THE APPLIANCE IS COOL

Next: &68, f2726

FUSE FURTHER INVESTIGATION

HEADER FOR FUSE INVESTIGATION

Next: &nff, f1027

HEADER FOR FAN FAULT

HEADER FOR FAN FAULT CODE - OUTSIDE MODEL

Next: &nff, f2133

HEADER FOR INTERMITTENT IGNITION INVESTIGATION

HEADER FOR INTERMITTENT IGNITION LOCKOUT INVESTIGATION - OUTSIDE MODEL

Next: &nff, f2234

OBSERVATION STANDBY

ENSURE NO DEMANDS

Next: &587, ?2792, ?2794, ?2815

OBSERVATION PUMP RUNS

RUNT HOT WATER TAP AT 2 L/MIN

Next: &939, f2821

OBSERVATION JUMPER SET UP

THE 2 JUMPERS (BLUE

Next: &2694, !f2814

OPERATION DHW

Next: &117, ?2823, ?2854, ?2856, ?2858

FLOW RATE DHW

Next: &2791, f2883

HEADER FOR FLOW THERMISTOR FAULT

HEADER FOR FLOW THERMISTOR FAULT CODE - OUTSIDE MODEL

Next: &nff, f3376

HEADER FOR RETURN THERMISTOR FAULT

HEADER FOR RETURN THERMISTOR FAULT - OUTSIDE MODEL

Next: &nff, f3383

OBSERVATION PREHEAT SATISFIES

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE AS INDICATED BY THE RED ARROW

Next: &3154, ?2983, ?2985

HEADER FOR OVERHEAT FAULT

HEADER FOR OVERHEAT FAULT CODE - OUTSIDE MODEL

Next: &nff, f3030

OBSERVATION CH DEMAND RECOGNISED

SUMMER/WINTER SWITCH SET TO WINTER (SWITCH PRESSED IN)

Next: &2822, ?3190, ?3192

HEADER FOR DRY FIRE FAULT

HEADER FOR DRY FIRE FAULT CODE - OUTSIDE MODEL

Next: &nff, f3390

HEADER FOR DHW FLOW SWITCH FAULT

HEADER FOR DHW FLOW SWITCH FAULT CODE - OUTSIDE MODEL

Next: &nff, f3583

INFORMATION JUMPERS

Next: &nff, !f3689

INFORMATION JUMPERS (CH OUTPUT)

AS STANDARD ALL 3 AP

Next: &nff, !f3691

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f3840

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f3842

HEADER FOR QADAI FLOW THERMISTOR RESISTANCE

OK TO BE BLANK

Next: &nff, f3844

HEADER FOR QADAI RETURN THERMISTOR RESISTANCE

OK TO BE BLANK

Next: &nff, f3848

HEADER FOR QADAI GAS VALVE RESISTANCE

OK TO BE BLANK

Next: &nff, f3852

HEADER FOR QADAI GAS VALVE VOLTAGE

OK TO BE BLANK

Next: &nff, f3856

HEADER FOR QADAI FAN RESISTANCE

OK TO BE BLANK

Next: &nff, f3860

HEADER FOR QADAI DIVERTER VALVE RESISTANCE

OK TO BE BLANK

Next: &nff, f3864

HEADER FOR QADAI DIVERTER VALVE VOLTAGE (CH)

OK TO BE BLANK

Next: &nff, f3868

HEADER FOR QADAI DIVERTER VALVE VOLTAGE (DHW)

OK TO BE BLANK

Next: &nff, f3874

HEADER FOR QADAI PUMP RESISTANCE

OK TO BE BLANK

Next: &nff, f3884

HEADER FOR QADAI EMC PUMP VOLTAGE

OK TO BE BLANK

Next: &nff, f3885

INCORRECT GAP PREVENTING RECTIFICATION

KIT - ELECTRODE

Next: End

RESTRICTED PREVENTING RECTIFICATION

FLUE

Next: End

RESTRICTED OR BLOCKED PREVENTING RECTIFICATION

PIPE 5MM

Next: End

RESTRICTED PREVENTING RECTIFICATION

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

CONDENSATE TRAP SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

WEAK OR SLOW POOR CIRCULATION ON HEATING CIRCUIT

PUMP

Next: End

CODING RESISTORS FAULTY

HARNESS HIGH / LOW VOLTAGE

Next: End

SOLENOID GONE PREVENTING OPENING

KIT - VALVE MULTIFUNCTIONAL

Next: End

RESTRICTED PREVENTING GAS VALVE OPENING

PIPE - FEED - BURNER

Next: End

RESTRICTED OR BLOCKED STOPPING GAS VALVE OPENING

PIPE 5MM

Next: End

INCORRECT GAP CAUSING POOR IGNITION

KIT - ELECTRODE

Next: End

FAULTY CAUSING POOR IGNITON

KIT - ELECTRODE - 1 SHORT AND 2 LONG

Next: End

FAULTY CAUSING POOR IGNITION

KIT - ELECTRODE - 3 SHORT WIRES

Next: End

POOR CONDITION CAUSING POOR IGNITION

HARNESS IGNITION (3 SHORT WIRES)

Next: End

FAULTY CAUSING POOR IGNITION

KIT - ELECTRODE (NO WIRES)

Next: End

POOR CONDITION CAUSING POOR IGNITION

HARNESS IGNITION

Next: End

RESTRICTED OR DAMAGED CASUING POOR IGNITION

BURNER ASSEMBLY

Next: End

LOW CAUSING POOR IGNITION

GAS INLET PRESSURE

Next: End

RESTRICTED CAUSING POOR IGNITION

PIPE - FEED - BURNER

Next: End

RESTRICTED OR BLOCKED CAUSING POOR IGNITION

PIPE 5MM

Next: End

SHORTED

PUMP

Next: End

CASE OFF

Z BLANKS

Next: End

FAN SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

SHORTED SOLENOID

KIT - VALVE MULTIFUNCTIONAL

Next: End

BACKED UP PREVENTING GAS VALVE OPENING

KIT - CONDENSATE TRAP

Next: End

BACKED UP CAUSING POOR IGNITION

KIT - CONDENSATE TRAP

Next: End

BACKED UP PREVENTING IGNTION

KIT - CONDENSATE TRAP

Next: End

RESTRICTED OR DAMAGED PREVENTING IGNITION

VENTURI

Next: End

RESTRICTED OR BLOCKED STOPPING IGNITION

PIPE 5MM

Next: End

INCORRECT GAP PREVENTING IGNITION

KIT - ELECTRODE

Next: End

FAULTY PREVENTING IGNITON

KIT - ELECTRODE - 1 SHORT AND 2 LONG

Next: End

FAULTY PREVENTING IGNITION

KIT - ELECTRODE - 3 SHORT WIRES

Next: End

POOR CONDITION STOPPING IGNITION

HARNESS IGNITION (3 SHORT WIRES)

Next: End

FAULTY PREVENTING IGNITION

KIT - ELECTRODE (NO WIRES)

Next: End

POOR CONDITION STOPPING SPARKING

HARNESS IGNITION

Next: End

RESTRICTED OR DAMAGED PREVENTING IGNITION

BURNER ASSEMBLY

Next: End

BACKED UP CAUSING BAFFLING

KIT - CONDENSATE TRAP

Next: End

RESTRICTED OR BLOCKED BAFFLING

PIPE 5MM

Next: End

RESTRICTED OR DAMAGED CAUING BAFFLING

VENTURI

Next: End

LEAKING CAUSING BAFFLING

SEAL COMBUSTION

Next: End

RESTRICTED CAUSING BAFFLING

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

SHORTING TO EARTH

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

SHORTED TO EARTH

THERMOSTAT - OVERHEAT (FAN)

Next: End

SHORTED TO EARTH

THERMOSTAT - OVERHEAT (FLOW)

Next: End

FAN SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

NO VOLTAGE TO FAN HALL SENSOR

CONTROL - ELECTRONIC

Next: End

FAN FAULT - HALL SENSOR

FAN

Next: End

FAN SECTION 2

HARNESS HIGH / LOW VOLTAGE

Next: End

SEIZED FAULT CODE

FAN

Next: End

RESISTANCE INCORRECT FAULT CODE

FAN

Next: End

SEALS BREACHED OR RESTRICTED BAFFLING

FLUE

Next: End

RESTRICTED REAR FLUEWAYS CAUSING BAFFLING

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

RESTRICTED OR DAMAGED PREVENTING RECTIFICATION

BURNER ASSEMBLY

Next: End

RESTRICTED READ FLUEWAYS PREVENTING RECTIFICATION

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

LOW CAUSING INTERMITTENT IGNITION

GAS INLET PRESSURE

Next: End

FAULTY CAUSING INTERMITTENT IGNITION

KIT - ELECTRODE - 1 SHORT AND 2 LONG

Next: End

PARTIALLY RESTRICTED OR BLOCKED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

KIT - CONDENSATE TRAP

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

PIPE 5MM

Next: End

RESTRICTED OR BREACHED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

FLUE

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

VENTURI

Next: End

RESTRICTED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

PIPE - FEED - BURNER

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION 1 SHORT WIRE 2 LONG

BURNER ASSEMBLY

Next: End

FAULTY FAUSING INTERMITTENT IGNITION

KIT - ELECTRODE - 3 SHORT WIRES

Next: End

POOR CONDITION CAUSING INTERMITTENT IGNITION

HARNESS IGNITION (3 SHORT WIRES)

Next: End

PARTIALLY RESTRICTED OR BLOCKED CAUSING INTERMITTENT IGNITION 3 SHORT WIRES

KIT - CONDENSATE TRAP

Next: End

RESTRICTED OR DAMAGED CAUSIGN INTERMITTENT IGNITION 3 SHORT WIRES

PIPE 5MM

Next: End

RESTRICTED OR BREACHED CAUSING INTERMITTENT IGNITION 3 SHORT WIRES

FLUE

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION 3 SHORT WIRES

VENTURI

Next: End

RESTRICTED CAUSING INTERMITTENT IGNITON 3 SHORT WIRES

PIPE - FEED - BURNER

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION 3 SHORT WIRES

BURNER ASSEMBLY

Next: End

FAULTY CAUSING INTERMITTENT IGNITION

KIT - ELECTRODE (NO WIRES)

Next: End

POOR CONDITION CAUSING INTERMITTENT IGNITION

HARNESS IGNITION

Next: End

PARTIALLY RESTRICTED OR BLOCKED CAUSING INTERMITTENT IGNITION

KIT - CONDENSATE TRAP

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION

PIPE 5MM

Next: End

RESTRICTED OR BREACHED CAUSING INTERMITTENT IGNITION

FLUE

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION

VENTURI

Next: End

RESTRICTED CAUSING INTERMITTENT IGNITION

PIPE - FEED - BURNER

Next: End

RESTRICTED OR DAMAGED CAUSING INTERMITTENT IGNITION

BURNER ASSEMBLY

Next: End

FAULTY CAUSING INTERMITTENT IGNITION 2

KIT - ELECTRODE - 1 SHORT AND 2 LONG

Next: End

FAULTY CAUSING INTERMITTENT IGNITION 2

KIT - ELECTRODE - 3 SHORT WIRES

Next: End

POOR CONDITION CAUSING INTERMITTENT IGNITION 2

HARNESS IGNITION (3 SHORT WIRES)

Next: End

FAULTY CAUSING INTERMITTENT IGNITION 2

KIT - ELECTRODE (NO WIRES)

Next: End

POOR CONDITION CAUSING INTERMITTENT IGNITION 2

HARNESS IGNITION

Next: End

RECTIFICATION SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

PRIMARY FLOW SWITCH SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

BLOWN

FUSE (PCB)

Next: End

FAULT CODES 2

Z BLANKS

Next: End

JUMPER SET UP

Z BLANKS

Next: End

WEAK OR SLOW POOR CIRCULATION POOR DHW OUTPUT

PUMP

Next: End

LOW CAUSING POOR OUTPUT

GAS INLET PRESSURE

Next: End

FAN SECTION 3

HARNESS HIGH / LOW VOLTAGE

Next: End

SEIZED

FAN

Next: End

RESISTANCE INCORRECT

FAN

Next: End

NOT RECOGNISING HALL SENSOR

CONTROL - ELECTRONIC

Next: End

FAN NEUTAL FAULT

CONTROL - ELECTRONIC

Next: End

INSUFFICIENT

COLD WATER SUPPLY

Next: End

PARTIALLY OR FULLY CLOSED

INLET VALVE - DHW

Next: End

RESTRICTED / BLOCKED

FILTER - CH (DHW)

Next: End

NOT MAKING

FLOW SWITCH DHW

Next: End

FIRING FOR DHW WITH NO DEMAND

TAP OPEN OR LEAKING DHW DRAW OFF

Next: End

STUCK MADE

FLOW SWITCH DHW

Next: End

RESTRICTED / BLOCKED DHW SIDE

KIT - PLATE HEAT EXCHANGER

Next: End

OUT OF CALIBRATION TRIGGERING FROST PROTECTION

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

NO CHARGE

EXPANSION TANK - ALTENIC

Next: End

OUT OF CALIBRATION STOPPING SPARKING

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

CODING RESISTORS FAULTY CAUSING WRONG OUTPUT

HARNESS HIGH / LOW VOLTAGE

Next: End

RESTRICTED REDUCING OUTPUT

FLUE

Next: End

RESTRICTED REDUCING OUTPUT

VENTURI

Next: End

RESTRICTED CAUSING POOR OUTPUT

PIPE - FEED - BURNER

Next: End

DIRTY REDUCING APPLIANCE OUTPUT

FAN

Next: End

RESTRICTED CAUSING LOW OUTPUT

BURNER ASSEMBLY

Next: End

RESTRICTED CAUSING POOR OUTPUT

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

REAR FLUEWAYS RESTRICTED CAUSING POOR OUTPUT

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

NO OUTPUT

FILTER - ELECTRICAL

Next: End

OUT OF CALIBRATION CAUSING POOR DHW OPERATION

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

NO VOLTAGE TO DIVERTER FOR PREHEAT OPERATION

CONTROL - ELECTRONIC

Next: End

DIVERTER VALVE SECTION PREHEAT OPERATION

HARNESS HIGH / LOW VOLTAGE

Next: End

PREVENTING PREHEAT FROM COMPLETING OR MAKING IT COME ON TOO OFTEN

TAP OPEN OR LEAKING DHW DRAW OFF

Next: End

STICKING AFTER DEMAND

FLOW SWITCH DHW

Next: End

OUT OF CALIBRATION AFFECTING PREHEAT

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

TRIPPED AND WIONT RESET

THERMOSTAT - OVERHEAT (FLOW)

Next: End

TRIPPED AND WONT RESET

THERMOSTAT - OVERHEAT (FAN)

Next: End

OUT OF CALIBRATION READING HOT WHEN NOT

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

WEAK OR SLOW CAUSING OVERHEAT

PUMP

Next: End

LEAKING CAUSING OVERHEAT

SEAL COMBUSTION

Next: End

OUT OF CALIBRATION CAUSING POOR DHW OPERATION

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

POOR DHW DUE TO PASSING MIXER

EXTERNAL MIXING

Next: End

CLOSED TOO MUCH (DHW OPERATION)

Next: End

RESTRICTED / BLOCKED (DHW OPERATION)

FILTER - CH

Next: End

NO VOLTAGE TO DIVERTER FOR DHW OPERATION

CONTROL - ELECTRONIC

Next: End

DIVERTER VALVE SECTION DHW OPERATION

HARNESS HIGH / LOW VOLTAGE

Next: End

OUT OF CALIBRATION CAUSING DHW TOO HOT

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

OUT OF CALIBRATION CAUSING DHW TOO HOT

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

CLOSED TOO MUCH PREVENTING CH CIRCULATION

Next: End

WEAK OR SLOW PREVENTING PRIMARY FLOW SWITCH FROM MAKING ON CH

PUMP

Next: End

RESTRICTED / BLOCKED STOPPING FLOW SWITCH ON CH

FILTER - CH

Next: End

WEAK OR SLOW PREVENTING PRIMARY FLOW SWITCH FROM MAKING

PUMP

Next: End

OUT OF CALIBRATION CAUSING DHW HOT AND COLD

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

OUT OF CALIBRATION CAUSING DHW HOT AND COLD

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

WEAK OR SLOW POOR CIRCULATION DHW RUNS HOT AND COLD

PUMP

Next: End

CLOSED TOO MUCH (DHW OPERATION) HOT AND COLD

Next: End

RESTRICTED / BLOCKED (DHW OPERATION) HOT AND COLD

FILTER - CH

Next: End

PARTIALLY OR FULLY CLOSED PREVENTING PRIMARY FLOW SWITCH MAKING

FLOW/RETURN VALVE

Next: End

OPEN TOO MUCH POOR CH OPERATION

Next: End

NO VOLTAGE TO DIVERTER FOR CH OPERATION

CONTROL - ELECTRONIC

Next: End

DIVERTER VALVE SECTION CH

HARNESS HIGH / LOW VOLTAGE

Next: End

RESTRICTED / BLOCKED POOR CH OPERATION

FILTER - CH

Next: End

NOT MOVING TO CH POSITION (SEIZED / STIFF)

VALVE BODY

Next: End

GAS VALVE HAS DAMAGED PCB

PCB + GAS VALVE

Next: End

OUT OF RANGE CAUSING FAULT CODE

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

STUCK IN FLOW THERMISTOR LOCKOUT

CONTROL - ELECTRONIC

Next: End

OUT OF RANGE CAUSING FAULT CODE

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

STUCK IN RETURN THERMISTOR LOCKOUT

CONTROL - ELECTRONIC

Next: End

NO POWER TO PUMP DRY FIRE FAULT CODE

CONTROL - ELECTRONIC

Next: End

WEAK OR SLOW PREVENTING PRIMARY FLOW SWITCH FROM MAKING FRY FIRE

PUMP

Next: End

FLOW SWITCH SECTION FOR DRY FIRE FAULT

HARNESS HIGH / LOW VOLTAGE

Next: End

STUCK IN DRY FIRE LOCKOUT

CONTROL - ELECTRONIC

Next: End

OUT OF CALIBRATION CAUSING OVERHEAT

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

CLOSED TOO MUCH OVERHEAT INVESTIGATION

Next: End

RESTRICTED / BLOCKED OVERHEAT INVESTIGATION

FILTER - CH

Next: End

OUT OF CALIBRATION CAUSING OVERHEAT

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

TRIPPING EARLY

THERMOSTAT - OVERHEAT (FLOW)

Next: End

INCORRECT PUMP OVERRUN OPERATION

CONTROL - ELECTRONIC

Next: End

DIVERTER VALVE SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

SHORTING TO EARTH

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

SHORTED

FILTER - ELECTRICAL

Next: End

STUCK IN LOW VOLTAGE LOCKOUT

CONTROL - ELECTRONIC

Next: End

LOW INPUT VOLTAGE

Next: End

PARTIALLY CLOSED ALLOWING PRIMARY FLOW SWITCH TO MAKE BUT AFFECTING CH OPERATION

FLOW/RETURN VALVE

Next: End

SHORTED

TIMER - ELECTROMECHANICAL

Next: End

BLOWN

FUSE (MAINS)

Next: End

STUCK IN DHW FLOW SWITCH FAULT

CONTROL - ELECTRONIC

Next: End

FAULT CODE

FLOW SWITCH DHW

Next: End

LOW PREVENTING RECTIFICATION

GAS INLET PRESSURE

Next: End

RESTRICTED PREVENTING IGNITION

FLUE

Next: End

JUMPER INFORMATION

Z BLANKS

Next: End

JUMPER INFORMATION CH

Z BLANKS

Next: End

OUT OF CALBRATION CAUSING POOR CH OPERATION

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

OUT OF CALIBRATION CAUSING POOR CH OPERATION

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

NOT RECOGNISING HALL SENSOR WHITE LABEL

CONTROL - ELECTRONIC

Next: End

FAN NEUTAL FAULT WHITE LABEL

CONTROL - ELECTRONIC

Next: End

NOT RECOGNISING HALL SENSOR WHITE LABEL FAN FAULT CODE

CONTROL - ELECTRONIC

Next: End

FAN NEUTAL FAULT WHITE LABEL FAN FAULT CODE

CONTROL - ELECTRONIC

Next: End

NOT RECOGNISING HALL SENSOR FAN FAULT CODE

CONTROL - ELECTRONIC

Next: End

FAN NEUTAL FAULT FAN FAULT CODE

CONTROL - ELECTRONIC

Next: End

NO VOLTAGE TO FAN HALL SENSOR (WHITE LABEL)

CONTROL - ELECTRONIC

Next: End

FAN FAULT - HALL SENSOR (WHITE LABEL)

FAN

Next: End

WEAK OR SLOW PREVENTING PRIMARY FLOW SWITCH FROM MAKING FRY FIRE WHITE LABEL

PUMP

Next: End

FLOW SWITCH SECTION FOR DRY FIRE FAULT WHITE LABEL

HARNESS HIGH / LOW VOLTAGE

Next: End

WRONG GAP OR DAMAGED PREVENTING SPARKING

KIT - ELECTRODE

Next: End

FAULTY CAUSING NO SPARK

KIT - ELECTRODE - 1 SHORT AND 2 LONG

Next: End

FAULTY PREVENTING SPARKING

KIT - ELECTRODE - 3 SHORT WIRES

Next: End

POOR CONDITION STOPPING SPARKING

HARNESS IGNITION (3 SHORT WIRES)

Next: End

FAULTY PREVENTING SPARKING

KIT - ELECTRODE (NO WIRES)

Next: End

POOR CONDITION PREVENTING SPARKING

HARNESS IGNITION

Next: End

JUMPER INFORMATION IGNITION

Z BLANKS

Next: End

PARTIALLY CLOSED CAUSING OVERHEAT ISSUES

FLOW/RETURN VALVE

Next: End

NOT GIVING DEMAND (ADDITONAL CONTROLS)

TIMER - ELECTROMECHANICAL

Next: End

NOT GIVING DEMAND

Next: End

NOT GIVING DEMAND

TIMER - ELECTROMECHANICAL

Next: End

NO SPARKING

KIT - VALVE MULTIFUNCTIONAL

Next: End

INTERMITTENT IGNITION

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

INTERMITTENT IGNITION 1

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

INTERMITTENT IGNITION 2

HEAT EXCHANGER PRIMARY FLUE WAYS

Next: End

LITE DIAGNOSTIC

Z BLANKS

Next: End

BLANK FOR QADAI

Z REDIRECT

Next: End

QADAI

THERMISTOR - FLOW TEMPERATURE - RED (RETURN)

Next: End

QADAI

KIT - VALVE MULTIFUNCTIONAL

Next: End

QADAI

CONTROL - ELECTRONIC

Next: End

QADAI

FAN

Next: End

QADAI

VALVE - PLASTIC - DIVERTER

Next: End

DIVERTER VALVE VOLTAGE CH

CONTROL - ELECTRONIC

Next: End

DIVERTER VALVE VOLTAGE DHW

CONTROL - ELECTRONIC

Next: End

QADAI RESISTANCE

PUMP

Next: End

QADAI VOLTAGE

PUMP

Next: End

QADAI

THERMISTOR - FLOW TEMPERATURE - RED

Next: End

SHORTING OUT PREVENTING RECTIFICATION

KIT - CONDENSATE TRAP

Next: End

DIAGNOSTIC OPTION

Z BLANKS

Next: End

REVERSED POLARITY

Next: End

GENERAL ERROR

CONTROL - ELECTRONIC

Next: End

LOW CAUSING BAFFLING

GAS INLET PRESSURE

Next: End

NOT RECTIFYING

CONTROL - ELECTRONIC

Next: End

STUCK IN LOW VOLTAGE HARNESS LOCKOUT

CONTROL - ELECTRONIC

Next: End

LOW PREVENTING IGNTIION

GAS INLET PRESSURE

Next: End

GAS VALVE SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

NOT OPENING

KIT - VALVE MULTIFUNCTIONAL

Next: End

GENERATING WEAK SPARK CAUSING POOR IGNITION 1 SHORT 2 LONG

CONTROL - ELECTRONIC

Next: End

GENERATING WEAK SPARK CAUSING POOR IGNITION 3 SHORT

CONTROL - ELECTRONIC

Next: End

GENERATING WEAK SPARK CAUSING POOR IGNITION

CONTROL - ELECTRONIC

Next: End

SHORTED BLOWING FUSE

FAN

Next: End

GAS VALVE SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

GENERATING WEAK OR NO SPARK 1 SHORT WIRE 2 LONG

CONTROL - ELECTRONIC

Next: End

GENERATING WEAK OR NO SPARK 3 SHORT

CONTROL - ELECTRONIC

Next: End

GENERATING WEAK OR NO SPARK PREVENTING IGNITION

CONTROL - ELECTRONIC

Next: End

WRONG MIX CAUSING BAFFLING

KIT - VALVE MULTIFUNCTIONAL

Next: End

PCB BLOWING FUSE

PCB - FUSE INVESTIGATION

Next: End

FLOW THERMISTOR SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

OVERHEAT SECTION SHORTED TO EARTH

HARNESS HIGH / LOW VOLTAGE

Next: End

NOT RECOGNISING HALL SENSOR FAULT CODE

CONTROL - ELECTRONIC

Next: End

NOT POWERING FAN FAULT CODE

CONTROL - ELECTRONIC

Next: End

NO SPARKING 1 SHORT 2 LONG INTERMITTENT IGNITION

CONTROL - ELECTRONIC

Next: End

NO SPARKING 3 SHORT INTERMITTENT IGNITION

CONTROL - ELECTRONIC

Next: End

NO SPARKING INTERMITTENT IGNITION

CONTROL - ELECTRONIC

Next: End

PCB FUSE FURTHER INVESTIGATION

Z BLANKS

Next: End

FAULT CODES

Z BLANKS

Next: End

POOR DHW OPERATION (OUTPUT)

CONTROL - ELECTRONIC

Next: End

NOT RUNNING

PUMP

Next: End

PUMP SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

NOT POWERING FAN

CONTROL - ELECTRONIC

Next: End

ELECTRICAL FAULT PREVENTING RUNNING

FAN

Next: End

NO POWER TO PUMP

CONTROL - ELECTRONIC

Next: End

STUCK IN DHW DEMAND

CONTROL - ELECTRONIC

Next: End

DHW FLOW SWITCH SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

RESTRICTED / BLOCKED

FLOW SWITCH DHW

Next: End

DHW FLOW SWITCH SECTION OPEN CIRCUIT

HARNESS HIGH / LOW VOLTAGE

Next: End

CORRECT OPERATION

FROST PROTECTION - NORMAL OPERATION

Next: End

FIRING FOR FROST PROTECTION INCORRECTLY

CONTROL - ELECTRONIC

Next: End

BLOCKED

PIPE - BOILER FLOW (EXPANSION VESSEL PIPE)

Next: End

NOT PROVIDING CORRECT OUTPUT (TOO LOW)

CONTROL - ELECTRONIC

Next: End

FAULTY NOT POWERING UP

CONTROL - ELECTRONIC

Next: End

MAINS SUPPLY SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

PASSING TO CH DURING PREHEAT

VALVE BODY

Next: End

NOT MOTORING PREHEAT

VALVE - PLASTIC - DIVERTER

Next: End

INCORRECT PREHEAT CONTROL

CONTROL - ELECTRONIC

Next: End

OVERHEAT WIRING SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

STUCK IN OVERHEAT LOCKOUT

CONTROL - ELECTRONIC

Next: End

RESTRICTED / BLOCKED PRIMARY SIDE

KIT - PLATE HEAT EXCHANGER

Next: End

RESTRICTED / BLOCKED POOR DHW

HEAT EXCHANGER PRIMARY WATERWAYS

Next: End

NOT RECOGNISING CH DEMAND

CONTROL - ELECTRONIC

Next: End

EXTERNAL CONTROLS SECTION TO PCB

Next: End

PASSING TO CH DURING DHW OPERATION

VALVE BODY

Next: End

NOT MOTORING PREHEAT DHW OPERATION

VALVE - PLASTIC - DIVERTER

Next: End

NOT CONTROLLING DHW MAXIMUM TEMPERATURE CORRECTLY

CONTROL - ELECTRONIC

Next: End

NOT MAKING ON CH

FLOW SWITCH PRIMARY CIRCUIT

Next: End

NOT MAKING

FLOW SWITCH PRIMARY CIRCUIT

Next: End

POOR DHW OPERATION (HOT AND COLD)

CONTROL - ELECTRONIC

Next: End

RESTRICTED / BLOCKED PRIMARY SIDE 2

KIT - PLATE HEAT EXCHANGER

Next: End

RESTRICTED / BLOCKED POOR DHW 2

HEAT EXCHANGER PRIMARY WATERWAYS

Next: End

NOT MOTORING TO CH POSITION

VALVE - PLASTIC - DIVERTER

Next: End

PROBELM WITH RADIATOR CIRCUIT

Next: End

NO VOLTAGE TO GAS VALVE

CONTROL - ELECTRONIC

Next: End

HARNESS TO GAS VALVE HAS DAMAGED PCB

PCB + HARNESS

Next: End

FLOW THERMISTOR SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

FLOW THERMISTOR

BOILER RESET

Next: End

RETURN THERMISTOR SECTION

HARNESS HIGH / LOW VOLTAGE

Next: End

RETURN THERMISTOR

BOILER RESET

Next: End

NOT RUNNING DRY FIRE

PUMP

Next: End

PUMP SECTION DRY FIRE

HARNESS HIGH / LOW VOLTAGE

Next: End

NOT MAKING DRY FIRE

FLOW SWITCH PRIMARY CIRCUIT

Next: End

DRY FIRE

BOILER RESET

Next: End

RESTRICTED / BLOCKED PRIMARY SIDE OVERHEAT INVESTIGATION

KIT - PLATE HEAT EXCHANGER

Next: End

RESTRICTED / BLOCKED POOR OVERHEAT INVESTIGATION

HEAT EXCHANGER PRIMARY WATERWAYS

Next: End

NO FAULT FOUND

OVERHEAT

Next: End

TEMPERATURE CONTROL FAULTY ALLOWING EXCESSIVE HEAT

CONTROL - ELECTRONIC

Next: End

SHORTED

VALVE - PLASTIC - DIVERTER

Next: End

RETURN THERMISTOR SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

MAINS SUPPLY LOW

BOILER RESET

Next: End

TRIPPING EARLY

THERMOSTAT - OVERHEAT (FAN)

Next: End

PUMP SECTION SHORTED

HARNESS HIGH / LOW VOLTAGE

Next: End

SHORTED

TIMER - ELECTROMECHANICAL (HARNESS)

Next: End

NO MAINS POWER IN

Next: End

MAINS FUSE FURTHER INVESTIGATION

Z BLANKS

Next: End

DHW FLOW SWITCH

BOILER RESET

Next: End

DHW FLOW SWITCH SECTION FAULT CODE

HARNESS HIGH / LOW VOLTAGE

Next: End

WRONG MIX CAUSING POOR IGNITION

KIT - VALVE MULTIFUNCTIONAL

Next: End

POOR CIRCULATION PREVENTING FLOW SWITCH MAKING DHW

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE

PRESSURE GAUGE - ALTENIC 962

Next: End

POOR CIRCULATION PREVENTING FLOW SWITCH MAKING CH

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 2

PRESSURE GAUGE - ALTENIC 962

Next: End

POOR CIRCULATION CAUSING POOR DHW OUTPUT

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 3

PRESSURE GAUGE - ALTENIC 962

Next: End

POOR CIRCULATION CAUSING DHW TO RUN HOT AND COLD

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 4

PRESSURE GAUGE - ALTENIC 962

Next: End

POOR CIRCULATION PREVENTING FLOW SWITCH MAKING DHW DRY FIRE

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 5

PRESSURE GAUGE - ALTENIC 962

Next: End

POOR CIRCULATION CAUSING OVERHEAT

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 6

PRESSURE GAUGE - ALTENIC 962

Next: End

OPENING BUT WRONG MIX SO NOT IGNITING

KIT - VALVE MULTIFUNCTIONAL

Next: End

POOR CH OPERATION (OUTPUT)

CONTROL - ELECTRONIC

Next: End

ELECTRICAL FAULT PREVENTING RUNNING WHITE LABEL

FAN

Next: End

ELECTRICAL FAULT PREVENTING RUNNING WHITE LABEL FAN FAULT CODE

FAN

Next: End

ELECTRICAL FAULT PREVENTING RUNNING FAN FAULT CODE

FAN

Next: End

NOT RECOGNISING HALL SENSOR FAULT CODE (WHITE LABEL)

CONTROL - ELECTRONIC

Next: End

POOR CIRCULATION PREVENTING FLOW SWITCH MAKING DHW DRY FIRE WHITE LABEL

AIR / AUTO AIR VENT / DE-AERATOR / SYSTEM PRESSURE

Next: End

NOT REFLECTING SYSTEM PRESSURE 5 WHITE LABEL

PRESSURE GAUGE - ALTENIC 962

Next: End

NOT MAKING DRY FIRE WHITE LABEL

FLOW SWITCH PRIMARY CIRCUIT

Next: End

NO SPARKING 1 SHORT 2 LONG

CONTROL - ELECTRONIC

Next: End

NO SPARKING 3 SHORT

CONTROL - ELECTRONIC

Next: End

NO SPARKING

CONTROL - ELECTRONIC

Next: End

OPEN CIRCUIT ON SWITCHED CONNECTIONS

TIMER - ELECTROMECHANICAL (HARNESS)

Next: End

NOT GIVING DEMAND 2

Next: End

OPEN CIRCUIT ON SWITCHED CONNECTIONS 2

TIMER - ELECTROMECHANICAL (HARNESS)

Next: End

NO SPARKING - GAS VALVE

HARNESS HIGH / LOW VOLTAGE

Next: End

NO FAULT FOUND 3 SHORT WIRES

INTERMITTENT IGNITION INVESTIGATION

Next: End

NO FAULT FOUND 1 SHORT WIRE 2 LONG

INTERMITTENT IGNITION INVESTIGATION

Next: End

NO FAULT FOUND

INTERMITTENT IGNITION INVESTIGATION

Next: End

FLOW THERMISTOR RESISTANCE

RESULT AS EXPECTED

Next: End

RETURN THERMISTOR RESISTANCE

RESULT AS EXPECTED

Next: End

GAS VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

GAS VALVE VOLTAGE

RESULT AS EXPECTED

Next: End

FAN RESISTANCE

RESULT AS EXPECTED

Next: End

DIVERTER VALVE RESISTANCE

RESULT AS EXPECTED

Next: End

PUMP RESISTANCE

RESULT AS EXPECTED

Next: End

PUMP VOLTAGE

RESULT AS EXPECTED

Next: End

DV VOLTAGE CH

RESULT AS EXPECTED

Next: End

DV VOLTAGE DHW

RESULT AS EXPECTED

Next: End

STUCK IN REVERSED POLARITY LOCKOUT

CONTROL - ELECTRONIC

Next: End

BOILER TO TEMPERATURE, RADIATORS COOL

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3540

BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM OPERATION CH

Next: p3692

NO DROP OR VERY MINOR DROP IN THE STANDING PRESSURE OBSERVED

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: p2018

INLET PRESSURE DROPS BELOW 17MB

CHARACTERISTIC TEST FROM PRESSURE GAS INLET AND DROP

Next: !p1777

BURNER IGNITES BUT IGNITION POOR (HEAVY / DELAYED / EXPLOSIVE / SLOW)

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p3592

ELECTRODE HAS 3 SHORT WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p1921

ELECTRODE HAS 1 SHORT WIRE AND 2 LONG WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p1923

ELECTRODE HAS 3 SHORT WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2080

ELECTRODE HAS 1 SHORT WIRE AND 2 LONG WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2082

ELECTRODE HAS 3 SHORT WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2506

ELECTRODE HAS 1 SHORT WIRE AND 2 LONG WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2508

ELECTRODE HAS 3 SHORT WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2627

ELECTRODE HAS 1 SHORT WIRE AND 2 LONG WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p2629

NO LEDS ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION STANDBY

Next: p2796

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM OBSERVATION STANDBY

Next: p2795

BOILER FIRES WITH NO DEMAND

CHARACTERISTIC TEST FROM OBSERVATION STANDBY

Next: p2816

TEMPERATURE RISE UNSATISFACTORY - RADIATORS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3275

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p2855

TEMPERATURE RISE UNSATISFACTORY - RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3205

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p3313

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CH

Next: p2929

RADIATORS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OBSERVATION PREHEAT SATISFIES

Next: p2984

PREHEAT DOES NOT SWITCH OFF OR COMES ON TOO FREQUENTLY - RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM OBSERVATION PREHEAT SATISFIES

Next: p3017

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION CH DEMAND RECOGNISED

Next: p3194

PUMP RUNS FOR 1 MINUTE EVERY 3 MINUTES

CHARACTERISTIC TEST FROM OBSERVATION CH DEMAND RECOGNISED

Next: p3220

BOILER CONTINUES TO HEAT PAST MAXIMUM TEMPERATURE

CHARACTERISTIC TEST FROM TEMPERATURE MAXIMUM OPERATION OVERHEAT

Next: !p3467

BOILER OVERHEATS BEFORE REACHING MAXIMUM TEMPERATURE

CHARACTERISTIC TEST FROM TEMPERATURE MAXIMUM OPERATION OVERHEAT

Next: p3470

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3630

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3632

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3635

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3637

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3640

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3642

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3645

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3647

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3650

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3652

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3655

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3657

SYSTEM PRESSURE INCORRECT OR AIR PRESENT

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3736

PRESSURE GAUGE DOES NOT REFLECT INCREASE IN PRESSURE

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE / AIR

Next: !p3738

ELECTRODE HAS 3 SHORT WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p3751

ELECTRODE HAS 1 SHORT WIRE AND 2 LONG WIRES

CHARACTERISTIC TEST FROM OBSERVATION TYPE OF ELECTRODE FITTED

Next: p3753

Burner does not ignite

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p76

Burner ignites BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p367

Burner igniteS, SPARKING CEASES but flame baffles out or dies away

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p80

10/07/2023 08:14:32 2304_1_50_1 29/11/2023 12:58:36

11/08/2023 07:33:37

Next: End

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE 6 PIN PLUG FROM THE PCB

Next: p1028, f1042

RESISTANCE GAS VALVE

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p2003, !f2002

RESISTANCE HARNESS FAN - FUSE INVESTIGATION

REMOVE THE CONNECTOR FROM THE FAN
REMOVE THE 3 PIN CONNECTOR FROM THE PCB

Next: !p2000, !f2001

RESISTANCE PUMP

DISCONNECT WIRES FROM PUMP

Next: !p3557, !f1999

RESISTANCE LOW VOLTAGE HARNESS RESISTORS

HINGE DOWN THE PCB HOUSING
REMOVE 8 WAY CONNECTOR FROM PCB

Next: !p1500, !f1501

RESISTANCE GAS VALVE

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1785, !f1786

INSPECTION SPARK ELECTRODES & EARTH GAP

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p1916, !f1917

INSPECTION SPARK ELECTRODES & EARTH GAP

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p2075, !f2076

RESISTANCE THERMISTOR FLOW TO EARTH

REMOVE THE RED WIRES FROM THE FLOW THERMISTOR

Next: !p2125, !f2126

RESISTANCE FAN OVERHEAT THERMOSTAT TO EARTH

REMOVE THE WIRES FROM THE FAN OVERHEAT THERMOSTAT

Next: p2127, !f2128

OBSERVATION FAN RUNS

ENSURE THE APPLIANCE IS COOL

Next: p2135, f2142

RESISTANCE HARNESS FAN

REMOVE THE CONNECTOR

Next: p2143, !f2144

RESISTANCE FAN AND HARNESS

REMOVE FAN CONNECTOR (RED AND BLUE WIRES) FROM THE PCB

Next: !p2149, !f2150

PRESSURE GAS INLET - INTERMITTENT

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2405, !f2293

OBSERVATION TYPE OF ELECTRODE FITTED

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p2625, ?2626, ?2628

RESISTANCE PRIMARY FLOW SWITCH

DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p2727, f3231

SOCKET AND SEE VOLTAGE INPUT CHECK

GAIN ACCESS TO THE K

Next: p2799, f3577

FURTHER INVESTIGATION FUSE

Next: !p2807, !f2808

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO THE PUMP ELECTRICAL CONNECTIONS

Next: !p2861, f2862

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p2863, f2864

RESISTANCE DHW FLOW SWITCH AND HARNESS

REMOVE THE 5 PIN CONNECTOR FROM THE PCB
RUN THE HOT WATER TAP AT 2 L/MIN

Next: !p2894, f2895

RESISTANCE FAN AND HARNESS

REMOVE FAN CONNECTOR (RED AND BLUE WIRES) FROM THE PCB

Next: !p2876, !f2877

INSPECTION ISOLATION VALVE DHW

Next: p2884, !f2889

RESISTANCE DHW FLOW SWITCH

DISCONNECT THE INLIN

Next: !p2906, !f2897

RESISTANCE DHW FLOW SWITCH AND HARNESS (DHW ISOLATED)

REMOVE THE 5 PIN CON

Next: p2900, !f2901

TEMPERATURE APPLIANCE

ATTACH TEMPERATURE CLAMP TO THE FLOW PIPE AS INDICATED BY THE RED ARROW

Next: !p2908, f2909

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: !p2910, !f2911

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: p3731, !f2952

RESISTANCE LOW VOLTAGE HARNESS RESISTORS

HINGE DOWN THE PCB HOUSING
REMOVE 8 WAY CONNECTOR FROM PCB

Next: p2959, !f2960

VOLTAGE DIVERTER VALVE AT PCB (DHW)

{GAINPCBACS}

Next: p2993, !f2994

OBSERVATION BOILER RESET OVERHEAT

ENSURE BOILER IS COOL

Next: p3446, f3032

RESISTANCE OVERHEAT THERMOSTAT CIRCUIT

REMOVE THE SIX PIN CONNECTOR FROM THE PCB

Next: p3033, f3034

RESISTANCE OVERHEAT THERMOSTAT

REMOVE THE BLACK WIRES FROM THE OVERHEAT THERMOSTAT

Next: p3035, !f3036

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: !p3131, f3185

INSPECTION EXTERNAL BYPASS

Next: p3186, !f3187

VOLTAGE CH DEMAND AT INCOMING TERMINAL STRIP

GAIN ACCESS TO INCOMING TERMINAL STRIP AS NECESSARY

Next: !p3197, f3198

OBSERVATION INTEGRAL TIMER FITTED

Next: p3199, !f3803

VOLTAGE DIVERTER VALVE AT PCB (DHW)

{GAINPCBACS}

Next: p3208, !f3209

INSPECTION SYSTEM PRESSURE / AIR

Next: p3232, ?3629, ?3631

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: !p3336, f3337

INSPECTION EXTERNAL BYPASS

Next: p3338, !f3339

VOLTAGE DIVERTER VALVE AT PCB (CH)

{GAINPCBACS}

Next: p3359, !f3360

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE 6 PIN PLUG FROM THE PCB

Next: !p3372, f3373

RESISTANCE GAS VALVE

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p3374, !f3375

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE 8 WAY CONNECTOR FROM PCB

Next: p3377, f3378

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: !p3379, !f3380

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE 8 WAY CONNECTOR FROM PCB

Next: p3384, f3385

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: !p3386, !f3387

OBSERVATION PUMP RUNS

RUNT HOT WATER TAP AT 2 L/MIN

Next: p3405, f3391

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO THE PUMP ELECTRICAL CONNECTIONS

Next: !p3392, f3393

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p3394, !f3402

INSPECTION SYSTEM PRESSURE / AIR

Next: p3408, ?3649, ?3651

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: !p3438, f3439

INSPECTION EXTERNAL BYPASS

Next: p3440, !f3441

RESISTANCE DIVERTER VALVE HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p3502, !f3503

RESISTANCE THERMISTOR RETURN TO EARTH

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: !p3513, !f3514

SOCKET AND SEE VOLTAGE INPUT CHECK

GAIN ACCESS TO THE K

Next: p3533, !f3537

RESISTANCE INTEGRAL TIMER

REMOVE THE WIRES FROM TERMINALS 1 AND 2 ON THE INTEGRAL TIMER

Next: !p3575, !f3576

RESISTANCE FUSE MAINS

ACCESS THE APPLIANCES 3A FUSE

Next: !p3578, f3579

FURTHER INVESTIGATION MAINS FUSE

Next: !p3580, !f3581

RESISTANCE DHW FLOW SWITCH AND HARNESS FOR FAULT CODE

REMOVE THE 5 PIN CONNECTOR FROM THE PCB

Next: p3584, f3587

RESISTANCE DHW FLOW SWITCH FOR FAULT CODE

DISCONNECT THE INLINE CONNECTOR TO THE DHW FLOW SWITCH

Next: !p3588, !f3589

VOLTAGE PCB FAN SENSOR (WHITE LABEL)

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p3704, !f3705

VOLTAGE PCB FAN SENSOR (WHITE LABEL)

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p3711, !f3712

VOLTAGE PCB FAN SENSOR (WHITE LABEL)

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p3727, !f3728

INSPECTION SYSTEM PRESSURE / AIR

Next: p3734, ?3735, ?3737

RESISTANCE INTEGRAL TIMER (DEMAND)

REMOVE THE WIRES FROM TERMINALS 3 AND 4 ON THE INTEGRAL TIMER
TIMER SET TO ON

Next: !p3800, !f3801

RESISTANCE INTEGRAL TIMER (DEMAND)

REMOVE THE WIRES FROM TERMINALS 3 AND 4 ON THE INTEGRAL TIMER
TIMER SET TO ON

Next: !p3808, !f3809

RESISTANCE GAS VALVE

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p3828, !f3829

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE 8 WAY CONNECTOR FROM PCB

Next: !p3845, !f3894

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE 8 WAY CONNECTOR FROM PCB

Next: !p3849, !f3850

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE 6 PIN PLUG FROM THE PCB

Next: !p3853, !f3854

VOLTAGE GAS VALVE

Next: !p3857, !f3858

RESISTANCE FAN AND HARNESS

REMOVE FAN CONNECTOR (RED AND BLUE WIRES) FROM THE PCB

Next: !p3861, !f3862

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB

Next: !p3865, !f3866

VOLTAGE DIVERTER VALVE AT PCB (CH)

{GAINPCBACS}

Next: !p3892, !f3872

VOLTAGE DIVERTER VALVE AT PCB (DHW)

{GAINPCBACS}

Next: !p3893, !f3877

RESISTANCE PUMP

DISCONNECT WIRES FROM PUMP

Next: !p3888, !f3889

VOLTAGE PUMP AT PUMP

GAIN ACCESS TO THE PUMP ELECTRICAL CONNECTIONS

Next: !p3890, !f3891

SOCKET AND SEE VOLTAGE INPUT CHECK

GAIN ACCESS TO THE K

Next: !p614, !f623

RESISTANCE FAN AND HARNESS

REMOVE FAN CONNECTOR (RED AND BLUE WIRES) FROM THE PCB

Next: p1030, f1043

RESISTANCE PUMP AND HARNESS

REMOVE 7 WAY CONNECTOR FROM THE PCB

Next: p3489, f1045

LIMPET TEST PUMP

Next: p3356, !f148

INSPECTION DETECTION ELECTRODE

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: p404, !f1255

INSPECTION FLUE

Next: p1274, !f1275

INSPECTION CASE PRESSURE PIPE

Next: p2163, !f1277

INSPECTION FLUEWAYS

REMOVE INNER PANEL

Next: p1278, !f1279

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p1280, !f2170

VOLTAGE GAS VALVE

Next: p1779, f3371

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE 6 PIN PLUG FROM THE PCB

Next: p1783, f1784

INSPECTION INJECTOR PIPE

Next: !p1787, !f1788

INSPECTION CASE PRESSURE PIPE

Next: p1778, !f1801

INSPECTION CASE PRESSURE PIPE

Next: p1913, !f1976

OBSERVATION SPARKING AT ELECTRODE

REMOVE THE TOP TWO S

Next: p1914, f1915

INSPECTION BURNER ASSEMBLY

Next: p1971, !f1935

OBSERVATION TYPE OF ELECTRODE FITTED

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p1918, ?1920, ?1922

RESISTANCE SPARK ELECTRODE (NO WIRES)

DISCONNECT THE LEADS

Next: p1930, !f1931

RESISTANCE SPARK ELECTRODE (3 SHORT)

DISCONNECT THE LEADS

Next: p1926, !f1927

RESISTANCE SPARK ELECTRODE (1 SHORT 2 LONG)

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: !p1924, !f1925

RESISTANCE HARNESS SPARK ELECTRODE (3 SHORT)

Next: !p1928, !f1929

RESISTANCE HARNESS SPARK ELECTRODE (NO WIRES)

Next: !p1932, !f1933

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2033, !f1969

INSPECTION INJECTOR PIPE

Next: !p3626, !f1973

INSPECTION CONDENSATE PIPE

Next: p1789, !f2032

INSPECTION CONDENSATE PIPE

Next: p1912, !f2063

INSPECTION CONDENSATE PIPE

Next: p2068, !f2067

INSPECTION FAN ASSEMBLY AIR INTAKE

Next: p2069, !f2070

INSPECTION CASE PRESSURE PIPE

Next: p3658, !f2072

OBSERVATION SPARKING AT ELECTRODE

REMOVE THE TOP TWO S

Next: p2073, f2074

INSPECTION BURNER ASSEMBLY

Next: !p3687, !f2093

OBSERVATION TYPE OF ELECTRODE FITTED

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p2077, ?2079, ?2081

RESISTANCE SPARK ELECTRODE (NO WIRES)

DISCONNECT THE LEADS

Next: p2089, !f2090

RESISTANCE SPARK ELECTRODE (3 SHORT)

DISCONNECT THE LEADS

Next: p2085, !f2086

RESISTANCE SPARK ELECTRODE (1 SHORT 2 LONG)

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: !p2083, !f2084

RESISTANCE HARNESS SPARK ELECTRODE (3 SHORT)

Next: !p2087, !f2088

RESISTANCE HARNESS SPARK ELECTRODE (NO WIRES)

Next: !p2091, !f2092

INSPECTION CONDENSATE PIPE

Next: p2099, !f2098

INSPECTION CASE PRESSURE PIPE

Next: p2100, !f2101

INSPECTION FAN ASSEMBLY AIR INTAKE

Next: p2110, !f2102

FGA COMBUSTION SEALS INTEGRITY

Next: p2155, !f2112

INSPECTION FLUEWAYS

REMOVE INNER PANEL

Next: p2113, !f2114

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p2115, !f2162

RESISTANCE THERMISTOR FLOW AND HARNESS TO EARTH

REMOVE 8 PIN CONNECTOR FROM PCB

Next: p3504, f2122

RESISTANCE SAFETY CIRCUIT TO EARTH

REMOVE THE 6 PIN CONNECTOR FROM THE PCB

Next: !p2124, f2123

RESISTANCE OVERHEAT THERMOSTAT TO EARTH

REMOVE THE BLACK WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p2131, !f2130

RESISTANCE HARNESS FAN LOW VOLTAGE

REMOVE THE FAN CONNECTOR
REMOVE THE 6 WAY CONNECTOR FROM THE PCB

Next: p3719, !f2137

VOLTAGE PCB FAN SENSOR

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p2138, !f2139

VOLTAGE PCB FAN SENSOR (FAN RUNNING)

RECONNECT FAN CONNECTOR AT THE FAN IF YOU HAVE NOT ALREADY DONE SO

Next: !p2140, !f2141

INSPECTION FAN FREE

UNDO THE TWO WING NUTS AND LOWER THE FAN ASSEMBLY

Next: p2145, !f2146

OBSERVATION FAN

{GAINPCBACS}
REMO

Next: p3708, f2148

INSPECTION FLUE

Next: p2111, !f2161

INSPECTION BURNER ASSEMBLY

Next: p1276, !f2169

OBSERVATION SPARKING AT ELECTRODE - INTERMITTENT

REMOVE THE TOP TWO S

Next: p2640, f2624

OBSERVATION TYPE OF ELECTRODE FITTED

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p2504, ?2505, ?2507

INSPECTION ELECTRODE (NO WIRES) - INTERMITTENT IGNITION

DISCONNECT THE LEADS FROM THE ELECTRODES AND CAREFULLY REMOVE THEM FROM THE COMBUSTION BOX DOOR.

Next: p2539, !f2540

INSPECTION ELECTRODE (3 SHORT WIRES) - INTERMITTENT IGNITION

DISCONNECT THE LEADS

Next: p2523, !f2524

INSPECTION ELECTRODE (1 SHORT WIRE AND 2 LONG WIRES) - INTERMITTENT IGNITION

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: p2509, !f2510

INSPECTION CONDENSATE PIPE

Next: p2511, !f2512

INSPECTION CASE PRESSURE PIPE

Next: p2513, !f2514

INSPECTION FLUE

Next: p2515, !f2516

VENTURI AIR INTAKE - INTERMITTENT

Next: p2517, !f2518

INSPECTION INJECTOR PIPE

Next: p2519, !f2520

INSPECTION BURNER ASSEMBLY

Next: p3833, !f2522

RESISTANCE HARNESS SPARK ELECTRODE (3 SHORT) - INTERMITTENT

Next: p2525, !f2526

INSPECTION CONDENSATE PIPE

Next: p2527, !f2528

INSPECTION CASE PRESSURE PIPE

Next: p2529, !f2530

INSPECTION FLUE

Next: p2531, !f2532

VENTURI AIR INTAKE - INTERMITTENT

Next: p2533, !f2534

INSPECTION INJECTOR PIPE

Next: p2535, !f2536

INSPECTION BURNER ASSEMBLY

Next: p3830, !f2538

RESISTANCE HARNESS SPARK ELECTRODE (NO WIRES) - INTERMITTENT

Next: p2541, !f2542

INSPECTION CONDENSATE PIPE

Next: p2543, !f2544

INSPECTION CASE PRESSURE PIPE

Next: p2545, !f2546

INSPECTION FLUE

Next: p2547, !f2548

VENTURI AIR INTAKE - INTERMITTENT

Next: p2549, !f2550

INSPECTION INJECTOR PIPE

Next: p2551, !f2552

INSPECTION BURNER ASSEMBLY

Next: p3836, !f2554

RESISTANCE SPARK ELECTRODE (NO WIRES)

DISCONNECT THE LEADS

Next: p2636, !f2637

RESISTANCE SPARK ELECTRODE (3 SHORT)

DISCONNECT THE LEADS

Next: p2632, !f2633

RESISTANCE SPARK ELECTRODE (1 SHORT 2 LONG)

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: !p2630, !f2631

RESISTANCE HARNESS SPARK ELECTRODE (3 SHORT)

Next: !p2634, !f2635

RESISTANCE HARNESS SPARK ELECTRODE (NO WIRES)

Next: !p2638, !f2639

RESISTANCE RECTIFICATION HARNESS - INTERMITTENT

DISCONNECT THE RECTI

Next: p2503, !f2693

RESISTANCE HARNESS FLOW SWITCH

REMOVE THE 5 PIN CONNECTOR FROM THE PCB
DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p2869, !f2758

FAULT CODES

Next: !p2811, !f2812

VOLTAGE MAINS INTO PCB

{GAINPCBACS}

Next: p2797, f2798

RESISTANCE FUSE (PCB)

REMOVE FUSE FROM THE PCB HOUSING AND ITS HOLDER

Next: !p2980, f2806

VOLTAGE EMC FILTER OUTPUT

SLIDE BACK THE RUBBE

Next: !p2981, !f2975

OBSERVATION WHICH DEMAND IS SHOWING

Next: p2817, f2907

RESISTANCE DHW FLOW SWITCH AND HARNESS (NO DEMAND)

REMOVE THE 5 PIN CONNECTOR FROM THE PCB

Next: !p2898, f2899

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: p3063, !f2977

LIMPET TEST PUMP

Next: p2830, !f2831

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p3088, !f2833

GAS RATE

Next: !p2834, f2958

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: p3212, !f3214

RESISTANCE HARNESS FAN

REMOVE THE CONNECTOR

Next: p2870, !f2871

INSPECTION FAN FREE

UNDO THE TWO WING NUTS AND LOWER THE FAN ASSEMBLY

Next: p2872, !f2873

OBSERVATION FAN

{GAINPCBACS}
REMO

Next: p3697, f2875

VOLTAGE PCB FAN SENSOR

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p2878, !f2879

RESISTANCE PCB NEUTRAL FOR FAN

REMOVE THE FAN CONNECTOR

Next: !p2880, !f2881

OBSERVATION COLD WATER SUPPLY

Next: p2885, !f2888

INSPECTION DHW FILTER

DHW ISOLATED AND DRAINED
REMOVE THE FILTER FROM THE DHW INLET CONNECTION ON THE BOILER CHASSIS

Next: p2886, !f2890

INSPECTION PLATE HEAT EXCHANGER

ISOLATE AND DRAIN TH

Next: !p2904, !f2905

RESISTANCE DHW FLOW SWITCH (NO DEMAND)

DISCONNECT THE INLINE CONNECTOR TO THE DHW FLOW SWITCH

Next: !p2902, !f2903

PRESSURE EXPANSION VESSEL

APPLIANCE PRIMARY CIRCUIT DRAINED

Next: !p2930, !f2931

INSPECTION FLUE

Next: p2961, !f2962

VENTURI AIR INTAKE

Next: p2963, !f2964

INSPECTION INJECTOR PIPE

Next: p2965, !f2966

INSPECTION FAN SCROLL

UNDO THE TWO WING NUTS AND LOWER THE FAN ASSEMBLY

Next: p2967, !f2968

INSPECTION BURNER ASSEMBLY

Next: p2969, !f2970

INSPECTION FLUEWAYS

REMOVE INNER PANEL

Next: p2971, !f2972

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p2973, !f2974

INSPECTION DIVERTER VALVE HEAD (DHW POSITION)

Next: !p2991, f2992

RESISTANCE DIVERTER VALVE HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p2995, !f2996

OBSERVATION ISOLATE DHW PREHEAT NOW SATISFIES

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE AS INDICATED BY THE RED ARROW

Next: p3020, !f3019

RESISTANCE DHW FLOW SWITCH AND HARNESS (NO DEMAND)

REMOVE THE 5 PIN CONNECTOR FROM THE PCB

Next: p3021, !f3022

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: !p3028, !f3024

LIMPET TEST PUMP

Next: p3041, !f3042

RESISTANCE THERMISTOR FLOW AND HARNESS OVERHEAT

REMOVE 8 WAY CONNECTOR FROM PCB

Next: !p3039, !f3040

RESISTANCE FAN OVERHEAT THERMOSTAT

REMOVE THE WIRES FROM THE FAN OVERHEAT THERMOSTAT

Next: !p3037, !f3038

FGA COMBUSTION SEALS INTEGRITY

Next: p3429, !f3044

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: p2826, !f3087

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: p3109, f3108

TEMPERATURE COMPARISON OF HOT WATER - EXTERNAL MIXING TEST

Next: p2832, !f3129

INSPECTION CH FILTER

PRIMARY SYSTEM WATER

Next: !p3188, !f3189

INSPECTION EXTERNAL BYPASS

Next: p3216, !f3227

VOLTAGE CH DEMAND AT PCB

{GAINPCBACS}

Next: !p3195, f3196

OBSERVATION ADDITIONAL EXTERNAL CONTROLS FITTED

Next: p3794, f3807

INSPECTION DIVERTER VALVE HEAD (DHW POSITION)

Next: !p3206, f3207

RESISTANCE DIVERTER VALVE HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: !p3210, !f3211

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: !p3213, !f3215

LIMPET TEST PUMP

Next: p3218, !f3228

INSPECTION CH FILTER

PRIMARY SYSTEM WATER

Next: !p3225, !f3230

INSPECTION ISOLATION VALVES CH

Next: p3217, !f3350

INSPECTION SYSTEM PRESSURE / AIR

Next: p3193, ?3634, ?3636

LIMPET TEST PUMP

Next: !p3233, !f3234

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: p3237, !f3238

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: p3239, !f3240

LIMPET TEST PUMP

Next: p3333, !f3242

INSPECTION SYSTEM PRESSURE / AIR

Next: p2825, ?3639, ?3641

INSPECTION SYSTEM PRESSURE / AIR

Next: p3236, ?3644, ?3646

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: !p3334, f3335

INSPECTION CH FILTER

PRIMARY SYSTEM WATER

Next: !p3340, !f3341

INSPECTION EXTERNAL BYPASS

Next: p119, !f3354

INSPECTION DIVERTER VALVE HEAD (CH POSITION)

Next: p3363, f3358

RESISTANCE DIVERTER VALVE HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB
REMOVE THE CONNECTOR FROM THE DIVERTER VALVE

Next: p3364, !f3362

INSPECTION CH FILTER

PRIMARY SYSTEM WATER

Next: !p3367, !f3368

INSPECTION DIVERTER VALVE BODY

REMOVE THE DIVERTER VALVE MOTOR FROM THE BODY

Next: !p3365, !f3369

OBSERVATION BOILER RESET THERMISTORS

Next: !p3381, !f3382

OBSERVATION BOILER RESET THERMISTORS

Next: !p3388, !f3389

RESISTANCE PRIMARY FLOW SWITCH

DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p3406, f3407

RESISTANCE HARNESS FLOW SWITCH

REMOVE THE 5 PIN CONNECTOR FROM THE PCB
DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p3426, !f3413

LIMPET TEST PUMP

Next: !p3410, !f3411

OBSERVATION BOILER RESET DRY FIRE

Next: !p3427, !f3428

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: p3430, !f3431

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: p3435, !f3444

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE CLAMPS TO THE FLOW AND RETURN PIPEWORK AS INDICATED BY THE RED ARROWS

Next: p3477, f3437

INSPECTION CH FILTER

PRIMARY SYSTEM WATER

Next: !p3442, !f3443

TEMPERATURE MAXIMUM OPERATION OVERHEAT

ATTACH A TEMPERATURE CLAMP TO THE FLOW PIPE AS INDICATED BY THE RED ARROW

Next: !p3465, ?3466, ?3468

INSPECTION SYSTEM PRESSURE / AIR

Next: p3765, ?3654, ?3656

RESISTANCE OVERHEAT THERMOSTAT

REMOVE THE BLACK WIRES FROM THE OVERHEAT THERMOSTAT

Next: !p3539, !f3472

OBSERVATION PUMP OVERRUN

Next: p3445, !f3488

RESISTANCE DIVERTER VALVE AND HARNESS

REMOVE THE 7 PIN CONNECTOR FROM THE PCB

Next: p3515, f3501

RESISTANCE THERMISTOR RETURN AND HARNESS TO EARTH

REMOVE 8 PIN CONNECTOR FROM PCB

Next: p2121, f3512

RESISTANCE EMC FILTER

SLIDE BACK THE RUBBE

Next: p3558, !f3531

OBSERVATION BOILER RESET LOW MAINS VOLTAGE

Next: !p3535, !f3536

INSPECTION ISOLATION VALVES CH

Next: p3351, !f3556

RESISTANCE INTEGRAL TIMER AND HARNESS

REMOVE THE WIRES FRO

Next: p2120, f3574

OBSERVATION BOILER REST DHW FLOW SWITCH

Next: !p3585, !f3586

OBSERVATION PCB IGNITION JUMPER


AT THE START OF

Next: p1940, !f3764

INSPECTION FLUE

Next: p2071, !f3684

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p388, !f368

RESISTANCE THERMISTOR FLOW

REMOVE THE RED WIRES FROM THE THERMISTOR

Next: p3693, !f3694

RESISTANCE THERMISTOR RETURN

REMOVE THE BLUE WIRES FROM THE RETURN THERMISTOR

Next: !p3695, !f3696

OBSERVATION WHICH PCB VERSION IS FITTED

INSPECT THE BACK OF THE PCB.
WHAT COLOUR IS THE LABEL?

Next: p2874, f3703

RESISTANCE PCB NEUTRAL FOR FAN

REMOVE THE FAN CONNECTOR

Next: !p3706, !f3707

OBSERVATION WHICH PCB VERSION IS FITTED

INSPECT THE BACK OF THE PCB.
WHAT COLOUR IS THE LABEL?

Next: p3709, f3710

VOLTAGE PCB FAN SENSOR

{GAINPCBACS}
DISCONNECT FAN CONNECTOR AT THE FAN AND MAKE SAFE

Next: p3715, !f3716

RESISTANCE PCB NEUTRAL FOR FAN

REMOVE THE FAN CONNECTOR

Next: !p3713, !f3714

RESISTANCE PCB NEUTRAL FOR FAN

REMOVE THE FAN CONNECTOR

Next: !p3717, !f3718

OBSERVATION WHICH PCB VERSION IS FITTED

INSPECT THE BACK OF THE PCB.
WHAT COLOUR IS THE LABEL?

Next: p2136, f3726

VOLTAGE PCB FAN SENSOR FAN RUNNING (WHITE LABEL)

RECONNECT FAN CONNECTOR AT THE FAN IF YOU HAVE NOT ALREADY DONE SO

Next: !p3729, !f3730

RESISTANCE PRIMARY FLOW SWITCH

DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p3732, f3733

RESISTANCE HARNESS FLOW SWITCH

REMOVE THE 5 PIN CONNECTOR FROM THE PCB
DISCONNECT THE FLOW SWITCH AT THE INLINE CONNECTOR

Next: p3745, !f3742

LIMPET TEST PUMP

Next: !p3739, !f3740

INSPECTION SPARK ELECTRODES & EARTH GAP

REMOVE THE SPARK ELECTRODE ASSEMBLY

Next: p3810, !f3747

OBSERVATION TYPE OF ELECTRODE FITTED

PLEASE SELECT WHICH TYPE OF ELECTRODE IS FITTED TO THE APPLIANCE.

Next: p3748, ?3750, ?3752

RESISTANCE SPARK ELECTRODE (NO WIRES)

DISCONNECT THE LEADS

Next: p3760, !f3761

RESISTANCE SPARK ELECTRODE (3 SHORT)

DISCONNECT THE LEADS

Next: p3756, !f3757

RESISTANCE SPARK ELECTRODE (1 SHORT 2 LONG)

CAREFULLY REMOVE THE ELECTRODE ASSEMBLY FROM
THE COMBUSTION BOX DOOR

Next: !p3754, !f3755

RESISTANCE HARNESS SPARK ELECTRODE (3 SHORT)

Next: !p3758, !f3759

RESISTANCE HARNESS SPARK ELECTRODE (NO WIRES)

Next: !p3762, !f3763

INSPECTION ISOLATION VALVES CH

Next: p3031, !f3793

RESISTANCE INTEGRAL TIMER AND HARNESS (DEMAND)

REMOVE THE WIRES FRO

Next: !p3802, f3799

RESISTANCE GAS VALVE AND HARNESS

REMOVE THE 6 PIN PLUG FROM THE PCB

Next: p3746, f3827

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p3831, !f3832

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p3834, !f3835

INSPECTION HEAT EXCHANGER REAR FLUE WAYS

REMOVE INNER PANEL,

Next: !p3837, !f3838

OBSERVATION CONDENSATE TRAP DISCONNECTED - BURNER ESTABLISHES?

DISCONNECT THE LEAD FROM THE CONDENSE TRAP AT THE INLINE SPADE CONNECTOR AND MAKE SAFE

Next: p1241, !f403

RESISTANCE RECTIFICATION HARNESS

DISCONNECT THE RECTI

Next: p1273, !f1282

PRESSURE GAS INLET AND DROP

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2066, ?1774, ?1776

PRESSURE GAS INLET

ATTACH PRESSURE GAUGE TO THE INLET PRESSURE TEST POINT

Next: p2097, !f82

System Information