XSol Diagnostic System

Interactive Test Sequence Navigator

Welcome to the XSol Diagnostic System

This system provides interactive diagnostic tests with proper sequence navigation based on the decoded .seq file logic.

Start Diagnostic Sequence

or choose a specific test below:

WORCESTER GREENSTAR JUNIOR (HAS ON/OFF SWITCH AND A.P.S.)

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY

Next: nff

WORCESTER GREENSTAR JUNIOR


CASE REMOVAL<

Next: &2507, !f2

DHW FLOW RATE

Next: &2314, f2478

DHW OPERATION

Next: &148, ?96, ?98, ?100, ?102, ?671, ?2089

CH OPERATION

CH TEMPERATURE CONTROL SET TO MAX

Next: &183, ?149, ?151, ?715

PUMP OVERRUN

CH TEMPERATURE CONTROL SET TO MAX

Next: &185, !f184

SYPHON OPERATION

Next: &nff, !f186

DHW BURNER IGNITION & ESTABLISH

TURN HOT WATER TAP O

Next: &1826, ?318, ?322, ?986, ?1509, ?3355

ENHANCED FAULT CODES


&NB

Next: &1052, !f467

TYPE OF DIAGNOSTIC PROCEDURE

PLEASE SELECT FROM O

Next: &2286, !f471

MAXIMUM OUTPUT MODE

INSTRUCTIONS TO S

Next: &nff, !f701

FURTHER INVESTIGATION OVERHEAT

NOT USED

Next: &nff, f911

POWER UP

ON/OFF SWITCH ON

Next: &5, f1053

FURTHER INVESTIGATION FUSE BLOWN

NOT USED

Next: &nff, f2147

FAN PRESSURE TEST

ATTACH PRESSURE GAUG

Next: &1833, f2807

INLET PRESSURE MAX OUTPUT

ATTACH PRESSURE GAU

Next: &1835, !f1834

COMBUSTION ANALYSIS MAX AND MIN

UNCLIP DIVERTER VALVE HEAD FROM THE BODY AND LEAVE IN A SAFE POSITION

Next: &2294, ?1836, ?1838

CH OPERATION PERFORMANCE TEST FAIL

OUTSIDE OF MODEL

Next: &nff, f1880

OPERATIONAL SEQUENCE

NOT USED

Next: &466, !f2288

CH DEMAND

CH TEMPERATURE CONTROL SET TO MAX
ENSURE BOILER IS NOT UP TO TEMPERATURE

Next: &95, f2301

PUMP RUNS PREHEAT

ENSURE PRIMARY HEAT EXCHANGER IS BELOW 40°C (TO ENSURE A DEMAND FOR PREHEAT)

Next: &2331, f3161

INSPECTION INTERNAL BOILER

Next: &317, !f2332

INTERNAL FAULT

NOT USED

Next: &nff, f2335

VOLATILE LOCK OUT

NOT USED

Next: &nff, f3316

BURNER SEAL CHECK FOR OVERHEAT

OUTSIDE MODEL

Next: &nff, f2501

INFORMATION PREHEAT


1. THIS APPLI

Next: &470, !f2508

INFORMATION FAN PCB REMOVAL

Next: &nff, !f3571

INFORMATION FAN DEMAND VOLTAGE

THE PWM OR (DEMAND/S

Next: &nff, !f3796

BURNER BAFFLES OUT

FLUE

Next: End

BLOWN STAND BY MODE AT POWER UP

FUSE (FUSED SPUR)

Next: End

LED AT POWER UP

PCB

Next: End

FAN DOES NOT RUN

Z DIRECTION

Next: End

BLOWN STANDBY MODE

FUSE - MAINS

Next: End

BLOWN STANDBY MODE

FUSE

Next: End

FURTHER IN VESTIGATION F2

Z DIRECTION

Next: End

BURNER IGNITION

TRANSFORMER

Next: End

DHW SENSOR

SENSOR - TEMPERATURE - DHW

Next: End

PRIMARY TEST

INLET PRESSURE

Next: End

PUMP OVERRUN

PCB

Next: End

SYPHON

SYPHON

Next: End

TURBINE

HARNESS - MAINS

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE - DHW

Next: End

FAN VOLTAGE PCB

PCB

Next: End

FAN DOES NOT RUN

CABLE FAN CONNECTOR ASSEMBLY

Next: End

OVERHEAT

LIMITER 120°C - TEMPERATURE

Next: End

OVERHEAT 2

LIMITER - TEMPERATURE

Next: End

ELECTRICAL SAFETY

ELECTRICAL SAFETY CHECKS

Next: End

HEAT EXCHANGER NOISY

PUMP

Next: End

DHW COOL

PUMP

Next: End

PUMP PULSES

SYSTEM PRESSURE

Next: End

PULSES ON OFF

PUMP

Next: End

PUMP PULSES 2

SENSOR - CONTROL

Next: End

PUMP PULSES 2

SENSOR - TEMPERATURE - DHW

Next: End

BAFFLES OUT

TUBE GAS SUPPLY

Next: End

FUSE FURTHER INVESTIGATION

FLOW SENSOR ASSEMBLY

Next: End

PUMP - DHW COOL RADS COOLPUMP RUNNING PRE TEST OVERHEAT

PCB

Next: End

DHW COOL RADS COOLPUMP RUNNING PRE TEST OVERHEAT

CABLE - PUMP

Next: End

OVERHEAT

HEAT EXCHANGER ASSEMBLY

Next: End

GAS VALVE BURNER IGNITESFURTHER INVESTIGATION

HARNESS - MAINS

Next: End

FURTHER INVESTIGATION FUSE F1

PUMP

Next: End

FURTHER INVESTIGATION

TRANSFORMER

Next: End

FURTHER INVESTIGATION FUSE F1 FURTHER INVESTIGATION

PUMP

Next: End

FURTHER INVESTIGATION FURTHER INVESTIGATION

TRANSFORMER

Next: End

OPERATIONAL SEQUENCE

DIRECTION CHOICE OR CONTINUE

Next: End

FURTHER INVESTIGATION

GAS VALVE

Next: End

PUMP PULSING

HEAT EXCHANGER ASSEMBLY

Next: End

HEAT EXCHANGER NOISY

HEAT EXCHANGER ASSEMBLY

Next: End

INTERNAL CLOCK2DHW NOISY

PCB

Next: End

EXTERNAL CONTROLS INPUT (DHW)DHW NOISY

Next: End

FAN DOES NOT RUN

SENSOR - CONTROL

Next: End

NO IGNITION

WATER LEAK

Next: End

INTERNAL FAULT

Z DIRECTION

Next: End

COMBUSTION INCORRECT

TUBE GAS SUPPLY

Next: End

DROPS OUT MIN MODE

TUBE GAS SUPPLY

Next: End

CH PERFORMANCE FAIL

TUBE GAS SUPPLY

Next: End

DHW FLOW RATE

MAINS WATER SUPPLY

Next: End

BURNER SEAL FOR OVERHEAT

FLUE / BURNER SEALS

Next: End

INFORMATION PREHEAT

Z DIRECTION

Next: End

INTERNAL CLOCKDHW NOISY

PCB

Next: End

BURNER DOES NOT ESTABLISH

SYPHON

Next: End

DHW COOL RADS HOT DIVERTER MOTOR SWITCHING

PCB

Next: End

FAN DOES NOT RUN

CODE PLUG

Next: End

BOILER UP TO TEMP RADS DO NOT HEAT DIVERTER MOTOR SWITCHING

PCB

Next: End

DHW COOL RADS HOT DIVERTER MOTOR SUPPLY

PCB

Next: End

DHW COOL RADS HOT

HARNESS - STEPPER MOTOR

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT DIVERTER MOTOR SUPPLY

PCB

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT

HARNESS - STEPPER MOTOR

Next: End

DOES NOT ESTABLISH - FLAME SENSE SHORTING TO EARTH

HARNESS - MAINS

Next: End

BURNER BAFFLES OUT 1

FLUE

Next: End

BAFFLES OUT 2

TUBE GAS SUPPLY

Next: End

BURNER BAFFLES OUT

BURNER

Next: End

DOES NOT ESTABLISH

TUBE GAS SUPPLY

Next: End

FLAME SENSE BURNER IGNITES

HARNESS - MAINS

Next: End

BURNER IGNITES

ELECTRODE

Next: End

DOES NOT ESTABLISH 2

BURNER

Next: End

FAN PRESSURE TEST

SYPHON

Next: End

FAN PRESSURE TEST

TUBE GAS SUPPLY

Next: End

PRIMARY PRE TEST FAN PRESSURE

BURNER

Next: End

DHW COOL RADS COOL

EXTERNAL MIXING

Next: End

FAN DOES NOT RUN

EXTERNAL MIXING

Next: End

OVERHEAT

SENSOR - TEMPERATURE - DHW

Next: End

OVERHEAT

SENSOR - CONTROL

Next: End

FUSE INVESTIGATION

TIMER - MECHANICAL - MT10

Next: End

FAN RUNS

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FAN REDUCES STOPS

FLUE

Next: End

BURNER IGNITES

SYPHON

Next: End

BURNER IGNITES

INLET PRESSURE

Next: End

BURNER IGNITES

LEAD - IGNITION

Next: End

BURNER DOES NOT IGNITE

TUBE GAS SUPPLY

Next: End

BURNER IGNITES

ELECTRODE

Next: End

DOES NOT IGNITE PRESSURE DROPS

BURNER

Next: End

DOES NOT IGNITE

PRIMARY HEAT EXCHANGER

Next: End

DOES NOT IGNITE

SENSOR - TEMPERATURE - DHW

Next: End

BURNER DOES NOT IGNITE

FLUE

Next: End

DOES NOT IGNITE 2

TUBE GAS SUPPLY

Next: End

BURNER DOES NOT IGNITE

BURNER

Next: End

DOES NOT IGNITE

TUBE GAS SUPPLY

Next: End

BURNER DOES NOT IGNITE

HARNESS - MAINS

Next: End

NO VOLTAGE 1

PCB AND GAS VALVE

Next: End

BURNER DOES NOT IGNITE

PCB-HARNESS (MAIN)

Next: End

BURNER DOES NOT IGNITE 2

PCB-HARNESS (MAIN)

Next: End

DHW TOO COOL

HEAT EXCHANGER ASSEMBLY

Next: End

DHW TOO COOL 2

SENSOR - TEMPERATURE - DHW

Next: End

DHW TO COOL

SENSOR - CONTROL

Next: End

BURNER DOES NOT IGNITE NO DROPFAN RUNS OVERHEAT 1

LIMITER 120°C - TEMPERATURE

Next: End

BURNER DOES NOT IGNITE NO DROP

LIMITER - TEMPERATURE

Next: End

BURNER DOES NOT IGNITE NO DROP

SWITCH - AIR PRESSURE

Next: End

FAN RUNS

LIMITER 120°C - TEMPERATURE

Next: End

BURNER IGNITION

LIMITER - TEMPERATURE

Next: End

FAN RUNS

SWITCH - AIR PRESSURE

Next: End

FAN RUNS OVERHEAT 1

LIMITER 120°C - TEMPERATURE

Next: End

FLUE OVERHEAT

BURNER

Next: End

FLUE OVERHEAT

PRIMARY HEAT EXCHANGER

Next: End

FAN RUNS OVERHEAT 1

SWITCH - AIR PRESSURE

Next: End

DHW FLOW RATE

ISOLATION VALVES

Next: End

STUCK IN DHW NO HEAT TO RADS

DIVERTER VALVE ASSEMBLY

Next: End

PUMP DOES NOT RUN

SENSOR - CONTROL

Next: End

PUMP DOES NOT RUN

SENSOR - TEMPERATURE - DHW

Next: End

PREHEAT

CABLE - PUMP

Next: End

PREVENTING PREHEAT

DT20 / DT20RF

Next: End

PUMP DOES NOT RUN DT20

SENSOR - CONTROL

Next: End

PUMP DOES NOT RUN DT20

SENSOR - TEMPERATURE - DHW

Next: End

PREHEAT DT20

CABLE - PUMP

Next: End

DOES NOT ESTABLISH

BURNER

Next: End

BURNER IGNITES BUT NOT ESTABLISH

FLUE

Next: End

FAN PRESSURE PRIMARY TEST

FLUE

Next: End

CH PERFORMANCE FAIL 2

TUBE GAS SUPPLY

Next: End

CH OP PT FAIL FAN PRESSURE FAIL

BURNER

Next: End

CH OP PT FAIL FAN PRESSURE FAIL

FLUE

Next: End

FAN RUNS1 FAULT CODE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FAN VOLTAGE PCB1 FAULT CODE

PCB

Next: End

FAN DOES NOT RUN1 FAULT CODE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FAN DOES NOT RUNFAULT CODE

CODE PLUG

Next: End

FAN DOES NOT RUN 1FAULT CODE

SENSOR - CONTROL

Next: End

VOLATILE LOCKOUTFAULT CODE

SENSOR - TEMPERATURE - DHW

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT - LOW PRESSURE

SYPHON

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

FLUE

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT 3

TUBE GAS SUPPLY

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

BURNER

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT WRONG COMBUSTION

TUBE GAS SUPPLY

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT WRONG COMBUSTION DROPS MINIMUM

TUBE GAS SUPPLY

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT - POOR SPARK

PCB

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

SYPHON

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

INLET PRESSURE

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT- HIGH RESIST

LIMITER - TEMPERATURE (CORROSION)

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT 2

TUBE GAS SUPPLY

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

ELECTRODE

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

LEAD - IGNITION

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

HARNESS - MAINS

Next: End

INFORMATION FAN PCB REMOVAL

Z DIRECTION

Next: End

FURTHER INVESTIGATION FUSE F1

FAN

Next: End

FUSE INVESTIGATION - INCOMPATIBLE

FAN

Next: End

FURTHER INVESTIGATION FUSE F1 FURTHER INVESTIGATION

FAN

Next: End

FUSE INVESTIGATION SIT - INCOMPATIBLE

FAN

Next: End

FAN RUNS

FAN

Next: End

DOES NOT RUN

FAN

Next: End

FAN DOES NOT RUN - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FAN VOLTAGE PCB - NEW STYLE FAN

PCB

Next: End

FAN RUNS - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

BETWEEN 125 VAC AND 135 VAC

CABLE FAN CONNECTOR ASSEMBLY

Next: End

ABOVE 135 VAC

CABLE FAN CONNECTOR ASSEMBLY

Next: End

STSLOW THEN TO TO HIGH SPEED

CABLE FAN CONNECTOR ASSEMBLY

Next: End

BETWEEN 125 VAC AND 135 VAC - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

ABOVE 135 VAC - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

STSLOW THEN TO TO HIGH SPEED - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

BELOW 124 VAC

FAN

Next: End

SLOW THEN TO HIGH SPEED

FAN

Next: End

FAN RUNS1 FAULT CODE

FAN

Next: End

VOLATILE LOCKOUT FAN RUNS 1 - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT FAN RUNS 1 - NEW STYLE FAN

PCB

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT BETWEEN 125 VAC AND 135 VAC - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT ABOVE 135 VAC - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT STSLOW THEN TO TO HIGH SPEED - NEW STYLE

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT BETWEEN 125 VAC AND 135 VAC

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT ABOVE 135 VAC

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED

FAN

Next: End

VOLATILE LOCKOUT STSLOW THEN TO TO HIGH SPEED

CABLE FAN CONNECTOR ASSEMBLY

Next: End

VOLATILE LOCKOUT BELOW 124 VAC

FAN

Next: End

DOES NOT RUN1 FAULT CODE

FAN

Next: End

240V ON ALL FAN CONNECTIONS

PCB

Next: End

240V ON ALL FAN CONNECTIONS 2

PCB

Next: End

240V ON ALL FAN CONNECTIONS 3

PCB

Next: End

240V ON ALL FAN CONNECTIONS 4

PCB

Next: End

BLANK FOR FAN DEMAND VOLTAGE INFORMATION

Z DIRECTION

Next: End

DOES NOT ESTABLISH

INLET PRESSURE

Next: End

FAULT CODES

ENHANCED FAULT CODES

Next: End

FOR TYPE DIAG PROCEDURE

DIRECTION CHOICE OR CONTINUE

Next: End

DHW TOO COOL

SENSOR - TEMPERATURE - DHW

Next: End

HOT THEN COLD

HEAT EXCHANGER - PLATE

Next: End

DHW HOT THEN COLD

SENSOR - CONTROL

Next: End

DHW HOT THEN COLD

PUMP

Next: End

MAXIMUM OUTPUT INSTRUCTIONS

MAXIMUM OUTPUT INSTRUCTIONS

Next: End

EXPANSION VESSEL

EXPANSION VESSEL

Next: End

DHW COOL

SYSTEM PRESSURE

Next: End

DHW NOISY

SYSTEM PRESSURE

Next: End

DHW HOT THEN COLD

SYSTEM PRESSURE

Next: End

CH NOISY

PUMP

Next: End

CH NOISY

SENSOR - CONTROL

Next: End

CH NOISY

SYSTEM PRESSURE

Next: End

RADS DO NOT HEAT

SYSTEM PRESSURE

Next: End

RADS DO NOT HEAT

PUMP

Next: End

RADS DO NOT HEAT

ISOLATION VALVES

Next: End

OVERHEAT

SYSTEM PRESSURE

Next: End

OVERHEAT

PUMP

Next: End

RADS COLD

VALVE - BYPASS

Next: End

BURNER BAFFLES OUT

SYPHON

Next: End

BURNER BAFFLES OUT

INLET PRESSURE

Next: End

BURNER BAFFLES OUT

GAS VALVE

Next: End

SUPPLY FAULT AT POWER UP

Next: End

FURTHER INVESTIGATION FUSED SPUR

Z DIRECTION

Next: End

DHW COOL RADIATORS HOT

DIVERTER VALVE ASSEMBLY

Next: End

FURTHER INVESTIGATION LED PCB FAULT TO FAN RUNS BURNER IGNITES AND ESTABLISHES

Z DIRECTION

Next: End

FURTHER INVESTIGATION F1

Z DIRECTION

Next: End

FURTHER INVESTIGATION F3

Z DIRECTION

Next: End

BLOWN STANDBY MODE AT POWER UP

FUSE

Next: End

TRANSFORMER

PCB

Next: End

OVERHEAT

PCB

Next: End

DHW TOO HOT

PCB

Next: End

DHW TOO HOT

HARNESS - MAINS

Next: End

CH NOISY

PCB

Next: End

CH NOISY

HEAT EXCHANGER ASSEMBLY

Next: End

CH NOISY

Next: End

FAN SIGNAL

PCB

Next: End

FLOW SENSOR FAN RUNS 2

HARNESS - MAINS

Next: End

DHW SENSOR FAN DOES NOT RUN

HARNESS - MAINS

Next: End

FAN DOES NOT RUN

PCB

Next: End

FAN RUNSOVERHEAT

SWITCH - AIR PRESSURE

Next: End

PUMP PULSES

HEAT EXCHANGER - PLATE

Next: End

DHW COOL RADIATORS COOLPUMP RUNNING PRE TEST OVERHEAT

PUMP

Next: End

OVERHEAT

HEAT EXCHANGER - PLATE

Next: End

FURTHER INVESTIGATION FUSE F1

CABLE - PUMP

Next: End

FURTHER INVESTIGATION FUSE F1

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FURTHER INVESTIGATION FUSE F1 FURTHER INVESTIGATION

CABLE - PUMP

Next: End

FURTHER INVESTIGATION FUSE F1 FURTHER INVESTIGATION

CABLE FAN CONNECTOR ASSEMBLY

Next: End

FURTHER INVESTIGATION FURTHER INVESTIGATION

PCB (FUSE INVESTIGATION)

Next: End

FURTHER INVESTIGATION 1

GAS VALVE

Next: End

GAS VALVE BURNER IGNITES 1FURTHER INVESTIGATION

HARNESS - MAINS

Next: End

CH OPERATION DHWDHW NOISY

HEATING CONTROLS

Next: End

EXTERNAL CONTROLS RETURNDHW NOISY

Next: End

CH OPERATION (DHW)DHW NOISY

HEATING CONTROLS

Next: End

INTERNAL FAULT

DIRECTION CHOICE OR CONTINUE

Next: End

CO2 SETTINGS INCORRECT

GAS VALVE SETTING RETEST

Next: End

DROPS OUT ON MINIMUM

GAS VALVE SETTING

Next: End

CH OP PT FAIL

GAS VALVE SETTING RETEST

Next: End

FLOW RATE

HEAT EXCHANGER - PLATE

Next: End

FLOW RATE

FLOW SENSOR ASSEMBLY

Next: End

FLOW RATE

FILTER - INSERT - DHW

Next: End

FLOW RATE

FLOW REGULATOR

Next: End

FLOW RATE

NOZZLE

Next: End

OVERHEAT OCCURED

NORMAL OPERATION

Next: End

FLAME SENSE BURNER IGNITES DOES NOT ESTABLISH

PCB

Next: End

FLAME SENSE

PCB

Next: End

DHW COOL RADS HOT ELECTRICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

BOILER REACHES TEMP RADS DO NOT HEAT ELECTRICAL FAULT

MOTOR - DIVERTER VALVE

Next: End

SHORTING TO EARTH

ELECTRODE

Next: End

BAFFLES OUT

MEMBRANE

Next: End

BAFFLES OUT

FAN

Next: End

BURNER BAFFLES OUT

PRIMARY HEAT EXCHANGER

Next: End

BURNER DOES NOT ESTABLISH

GAS VALVE

Next: End

FAN PRESSURE TEST

MEMBRANE

Next: End

FAN PRESSURE TEST

FAN

Next: End

ELECTRICAL

FLOW SENSOR ASSEMBLY

Next: End

FURTHER INVESTIGATION

PCB (FUSE INVESTIGATION)

Next: End

FAN REDUCES STOPS

SWITCH - AIR PRESSURE

Next: End

NOT IGNITING WITH DROP

MEMBRANE

Next: End

NOT IGNITING WITH DROP

FAN

Next: End

BURNER DOES NOT IGNITE

GAS VALVE

Next: End

NOT IGNITING NO DROP

MEMBRANE

Next: End

NOT IGNITING NO DROP

FAN

Next: End

BURNER DOES NOT IGNITE2

PRIMARY HEAT EXCHANGER

Next: End

BURNER DOES NOT IGNITE 2

GAS VALVE

Next: End

VOLTAGE GAS VALVE 1

PCB

Next: End

VOLTAGE GAS VALVE

PCB

Next: End

NO VOLTAGE

PCB AND GAS VALVE

Next: End

DHW COOL RADIATORS COOL

HEAT EXCHANGER - PLATE

Next: End

DHW COOL RADS COOL PRESSURE OK

HARNESS - MAINS

Next: End

DHW TOO COOL 2

PCB

Next: End

BURNER DOES NOT IGNITE NO DROP OVERHEAT

HARNESS - MAINS

Next: End

DOES NOT IGNITE - OPEN CIRCUIT

LIMITER - TEMPERATURE (CORROSION)

Next: End

APS/FLUE/OH

HARNESS - MAINS

Next: End

OVERHEAT INVESTIGATION

LIMITER - TEMPERATURE (CORROSION)

Next: End

BURNER IGNITION OVERHEAT 1

LIMITER - TEMPERATURE

Next: End

APS/FLUE/OH OVERHEAT 1

HARNESS - MAINS

Next: End

DOES NOT IGNITE - HIGH RESIST

LIMITER - TEMPERATURE (CORROSION)

Next: End

PUMP DOES NOT RUN

HARNESS - MAINS

Next: End

PREHEAT

PCB

Next: End

PUMP DOES NOT RUN 2

HARNESS - MAINS

Next: End

PREHEAT

PUMP

Next: End

PUMP DOES NOT RUN DT20

HARNESS - MAINS

Next: End

PREHEAT DT20

PCB

Next: End

PUMP DOES NOT RUN 2 DT20

HARNESS - MAINS

Next: End

PREHEAT DT20

PUMP

Next: End

BURNER DOES NOT IGNITE

MEMBRANE

Next: End

BURNER DOES NOT IGNITE

FAN

Next: End

BURNER DOES NOT EST

PRIMARY HEAT EXCHANGER

Next: End

PRIMARY PRE TEST FAN PRESSURE

PRIMARY HEAT EXCHANGER

Next: End

CH OP PT FAIL FAN PRESSURE FAIL

PRIMARY HEAT EXCHANGER

Next: End

DOES NOT REACT TO DH DEMAND CH DEMAND 1

TIMER

Next: End

FAN DOES NOT RUN1 FAULT CODE

PCB

Next: End

FAN DOES NOT RUNFAULT CODE

HARNESS - MAINS

Next: End

FAN DOES NOT RUN 1FAULT CODE

PCB

Next: End

VOLATILE LOCKOUTFAULT CODE

HARNESS - MAINS

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT NO DROP

MEMBRANE

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT NO DROP

FAN

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT 2

PRIMARY HEAT EXCHANGER

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

GAS VALVE SETTING RETEST

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

GAS VALVE SETTING

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT

NO FAULT INTERMITTENT IGNITION

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT WITH DROP

MEMBRANE

Next: End

DHW BURNER IGNITION ESTABLISH - INTERMITTENT DROP

FAN

Next: End

FUSE INVESTIGATION

FAN PCB

Next: End

FUSE INVESTIGATION SIT

FAN PCB

Next: End

FAN RUNS

FAN PCB

Next: End

DOES NOT RUN

FAN PCB

Next: End

FAN DOES NOT RUN - NEW STYLE FAN

PCB

Next: End

DOES NOT RUN - NEW STYLE

FAN

Next: End

FAN RUNS - NEW STYLE

FAN

Next: End

FAN REDUCES AND STOPS - NEW STYLE

PCB

Next: End

BELOW 124 VAC - NEW STYLE

FAN

Next: End

BELOW 124 VAC

FAN PCB

Next: End

SLOW THEN TO HIGH SPEED - NEW STYLE

FAN

Next: End

SLOW THEN TO HIGH SPEED

FAN PCB

Next: End

FAN REDUCES AND STOPS

PCB

Next: End

FAN RUNS1 FAULT CODE

FAN PCB

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE FAN

PCB

Next: End

VOLATILE LOCKOUT FAN RUNS 1- NEW STYLE

FAN

Next: End

VOLATILE LOCKOUT FAN RUNS - NEW STYLE

FAN

Next: End

VOLATILE LOCKOUT FAN REDUCES AND STOPS - NEW STYLE

PCB

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED - NEW STYLE

FAN

Next: End

VOLATILE LOCKOUT BELOW 124 VAC - NEW STYLE

FAN

Next: End

VOLATILE LOCKOUT FAN REDUCES AND STOPS

PCB

Next: End

VOLATILE LOCKOUT SLOW THEN TO HIGH SPEED

FAN PCB

Next: End

VOLATILE LOCKOUT BELOW 124 VAC

FAN PCB

Next: End

DOES NOT RUN1 FAULT CODE

FAN PCB

Next: End

DHW HOT THEN COLD

PCB

Next: End

HEAT EXCHANGER NOISY

HEAT EXCHANGER - PLATE

Next: End

EXCESSIVE SYSTEM PRESSURE

HOSE - FLEXIBLE

Next: End

RADS DO NOT HEAT

Next: End

GAS VALVE OVERHEAT 1

PCB

Next: End

DHW COOL, RADIATORS HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p101

DHW TOO HOT

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1810

BOILER NOISY

CHARACTERISTIC TEST FROM CH OPERATION

Next: p779

FAN RUNS BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p2896

BOILER REACHES TEMPERATURE, RADIATORS DO NOT HEAT

CHARACTERISTIC TEST FROM CH OPERATION

Next: p796

CO2 SETTINGS INCORRECT

CHARACTERISTIC TEST FROM COMBUSTION ANALYSIS MAX AND MIN

Next: p2433

BURNER DROPS OUT IN MINIMUM MODE

CHARACTERISTIC TEST FROM COMBUSTION ANALYSIS MAX AND MIN

Next: p2437

TEMPERATURE DIFFERENTIAL INCORRECT LOCAL NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN

Next: !p1871

DIFFERENTIAL OK SYSTEM NOISE

CHARACTERISTIC TEST FROM DIFFERENTIAL FLOW RETURN

Next: !p1873

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p1907

BOILER FIRES FOR DHW THEN SHUTS DOWN WITH PUMP PULSING ON/OFF

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p2090

FLOW SENSOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p2492

INLET FILTER BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p2494

FLOW REGULATOR BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p2496

NOZZLES BLOCKED AND/OR IN POOR CONDITION

CHARACTERISTIC TEST FROM CHECK FLOW COMPONENTS

Next: !p2498

VOLTAGE PRESENT ON TEST 1 BUT DOES NOT DROP OR FLUCTUATES

CHARACTERISTIC TEST FROM RECTIFICATION VOLTAGE

Next: p2748

VOLTAGE ABSENT ON TEST 1

CHARACTERISTIC TEST FROM RECTIFICATION VOLTAGE

Next: p2648

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2684

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2686

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2815

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2817

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p3775

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2973

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p2975

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3073

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3075

FLUE STAT CORRODED, DAMAGED, OR MOISTURE PRESENT

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: !p3141

RESISTANCE NOT AS EXPECTED

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: p3108

FLUE STAT CORRODED, DAMAGED, OR MOISTURE PRESENT

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: !p3116

RESISTANCE NOT AS EXPECTED

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: p3119

FLUE STAT CORRODED, DAMAGED, OR MOISTURE PRESENT

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: !p3127

RESISTANCE NOT AS EXPECTED

CHARACTERISTIC TEST FROM RESISTANCE SAFETY CIRCUIT

Next: p3130

BURNER IGNITES SMOOTHLY, BUT DOES NOT ESTABLISH

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p319

FAN DOES NOT RUN

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p1632

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3224

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3226

VOLATILE LOCKOUT DISPLAYED WITHIN 10 SECONDS

CHARACTERISTIC TEST FROM OBSERVATION BLUE LED - FAULT CODE

Next: p3319

VOLATILE LOCKOUT DISPLAYED AFTER MORE THAN 20 SECONDS, FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION BLUE LED - FAULT CODE

Next: p3701

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p3324

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p3783

BURNER DOES NOT IGNITE SMOOTHLY / INTERMITTENT IGNITION

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p3421

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3433

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3435

BURNER DROPS OUT IN MINIMUM MODE

CHARACTERISTIC TEST FROM COMBUSTION ANALYSIS MAX AND MIN

Next: p3441

CO2 SETTINGS INCORRECT

CHARACTERISTIC TEST FROM COMBUSTION ANALYSIS MAX AND MIN

Next: p3443

FAN MEMBRANE DAMAGED OR WORN

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3515

FAN STIFF TO TURN OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION FAN MEMBRANE

Next: !p3517

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p3635

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p3771

VOLTAGE ABOVE 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p3648

VOLTAGE BETWEEN 124 VAC AND 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p3650

VOLTAGE ABOVE 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p3666

VOLTAGE BETWEEN 110 VAC AND 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p3663

240 VOLTS ABSENT BETWEEN PURPLE/BROWN

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: !p3728

240 VOLTS PRESENT BETWEEN PURPLE/BROWN BUT OTHERS NOT AS ABOVE

CHARACTERISTIC TEST FROM VOLTAGE FAN (AT PCB)

Next: p3789

VOLTAGE ABOVE 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p3743

VOLTAGE BETWEEN 110 VAC AND 120 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB) - NEW STYLE

Next: p3745

VOLTAGE ABOVE 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p3755

VOLTAGE BETWEEN 124 VAC AND 135 VAC

CHARACTERISTIC TEST FROM FAN VOLTAGE CONTROL (PCB)

Next: p3757

DHW RUNS HOT THEN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p761

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM CH OPERATION

Next: p716

HEAT EXCHANGER NOISY

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p720

DHW TOO COOL, RADIATORS COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p733

BURNER IGNITES BUT BAFFLES OR IS NOISY

CHARACTERISTIC TEST FROM DHW BURNER IGNITION & ESTABLISH

Next: p987

22/02/2022 13:32:12 2202_1_50_1 01/06/2022 12:29:43

03/05/2022 13:56:40

Next: End

VOLTAGE MAINS POWER INPUT TO APPLIANCE

{GAINPCBACS}

Next: p1054, f1055

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p1056, f1057

FUSE FURTHER INVESTIGATION

Next: !p1058, !f1059

FUSE F1

REMOVE CONTROL BOX COVER IF NECESSARY

Next: p1635, f1636

FUSE FURTHER INVESTIGATION F1

Next: !p1637, !f1638

FUSE FURTHER INVESTIGATION F3

Next: !p1641, !f1642

FUSE FURTHER INVESTIGATION F2

Next: !p1645, !f1646

DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p1813, !f1814

FAN PRESSURE TEST

ATTACH PRESSURE GAUG

Next: p2446, f3252

VOLTS TO TURBINE

Next: p2846, f1891

HARNESS CONTINUITY (TURBINE)

BREAK THE INLINE CON

Next: !p1892, !f1893

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: !p1896, !f2330

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p1900, !f1901

VOLTAGE DIVERTER VALVE AT PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p2663, !f2636

RESISTANCE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p1990, !f1991

RESISTANCE FLOW SWITCH DHW

SEPARATE DHW FLOW SENSOR HARNESS (INLINE CONNECTOR)

Next: p2244, !f2163

PUMP VOLTAGE

{GAINPCBACS}

Next: p2201, !f2202

DIFFERENTIAL PRIMARY HEAT EXCHANGER

CH TEMPERATURE CONTR

Next: !p2218, !f2219

RESISTANCE SIT GAS VALVE AND HARNESS - FURTHER INVESTIGATION

REMOVE ST9 CONNECTOR

Next: p2273, f2270

RESISTANCE GAS VALVE HARNESS

REMOVE THE CONNECTOR

Next: !p2285, !f2254

RESISTANCE PUMP

DISCONNECT THE PUMP CONNECTOR
ENSURE PUMP SPEED SELECTOR IS SET TO POSITION 3

Next: !p2259, !f2260

RESISTANCE FAN

DISCONNECT FAN CONNECTOR AT FAN

Next: !p2263, f3592

RESISTANCE - SIT GAS VALVE SOLENOIDS

REMOVE THE TWO CONNECTORS FROM THE GAS VALVE

Next: !p2289, !f2290

RESISTANCE PUMP

DISCONNECT THE PUMP CONNECTOR
ENSURE PUMP SPEED SELECTOR IS SET TO POSITION 3

Next: !p2276, !f2277

RESISTANCE FAN

DISCONNECT FAN CONNECTOR AT FAN

Next: !p2280, f3597

INTERNAL OR EXTERNAL CONTROLS

Next: p2302, f2303

EXTERNAL CONTROLS VOLTAGE (RETURN)

{GAINPCBACS}
EXTERNAL CONTROLS CALLING FOR HEAT

Next: p2304, f2305

EXTERNAL CONTROL VOLTAGE (SEND)

Next: !p2306, !f2307

EXTERNAL CONTROL VOLTAGE (SEND)

Next: !p2312, !f2313

INTERNAL FAULT RESET

Next: !p2336, !f2337

OBSERVATION COLD MAINS FLOW RATE

Next: p3142, !f2499

INSPECTION SEAL INTEGRITY

Next: !p2505, !f2506

VOLTAGE DIVERTER VALVE AT PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p2668, !f2660

INSPECTION HARNESS ELECTRODE SENSE

DISCONNECT THE CONNECTOR FROM THE FLAME SENSE
ELECTRODE AT THE TOP OF THE APPLIANCE

Next: !p2674, !f2675

INSPECTION FLUE

Next: p2677, !f2678

CONDENSATE PIPE

Next: p3234, !f2809

RESISTANCE SAFETY CIRCUIT

DISCONNECT CONNECTOR

Next: p2982, ?3115, ?3117

RESISTANCE SAFETY CIRCUIT

DISCONNECT CONNECTOR

Next: p3062, ?3104, ?3106

INSPECTION FLUE

Next: p3066, !f3067

OBSERVATION GAS VALVE

Next: p3083, f3084

RESISTANCE - SIT GAS VALVE SOLENOIDS

REMOVE THE TWO CONNECTORS FROM THE GAS VALVE

Next: p3085, !f3086

RESISTANCE GAS VALVE HARNESS

REMOVE THE CONNECTOR

Next: !p3091, !f3092

DIFFERENTIAL PRIMARY HEAT EXCHANGER

CH TEMPERATURE CONTR

Next: !p3096, !f3097

DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p3100, !f3101

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: p3135, !f3136

OBSERVATION DT20 OR DT20RF FITTED

Next: p3175, f3188

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR

Next: p3178, f3179

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: !p3180, !f3181

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p3184, !f3185

OBSERVATION DISCONNECT DT20 PUMP RUNS?

REMOVE THE PROGRAMMER FROM THE FACIA OF THE APPLIANCE
REMOVE THE CONNECTOR FROM THE PCB

Next: p3190, !f3189

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR

Next: p3193, f3194

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: !p3195, !f3196

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p3199, !f3200

INSPECTION FLUE

Next: p3221, !f3231

INSPECTION FLUE

Next: p3260, !f3268

OBSERVATION BLUE LED - FAULT CODE

PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)

Next: p3738, ?3318, ?3320

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: !p3337, !f3338

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p3341, !f3342

CONDENSATE PIPE

Next: p3424, !f3425

OBSERVATION FAN TYPE

Next: p3593, !f3596

OBSERVATION FAN TYPE

Next: p3598, !f3601

VOLTAGE FAN (AT PCB) - NEW STYLE

MOVE CONNECTOR ST5 U

Next: p3633, ?3634, ?3636

OBSERVATION FAN TYPE

Next: p3645, f3657

FAN VOLTAGE CONTROL (PCB) - NEW STYLE

{GAINPCBACS}
MOVE CONNECTOR ST5 TO EXPOSE TERMINALS ON PCB

Next: p3670, ?3659, ?3661

VOLTAGE FAN (AT PCB) - NEW STYLE

MOVE CONNECTOR ST5 U

Next: p3726, ?3727, ?3729

FAN VOLTAGE CONTROL (PCB) - NEW STYLE

{GAINPCBACS}
MOVE CONNECTOR ST5 TO EXPOSE TERMINALS ON PCB

Next: p3741, ?3742, ?3744

BOILER RESET - OVERHEAT

ENSURE BOILER HAS COOLED

Next: p923, f912

RESISTANCE SAFETY CIRCUIT

DISCONNECT CONNECTOR

Next: !p913, ?3126, ?3128

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: !p106, f1935

FAN RUNS DHW DEMAND

Next: p1060, !f1139

FURTHER INVESTIGATION LED PROBLEM

Next: !p1072, !f1073

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p822, !f812

VOLTAGE AT PCB

{GAINPCBACS}

Next: p1633, f1634

INSPECTION CODE PLUG

LOWER THE FACIA PANEL

Next: p1887, !f2657

FUSE F3

REMOVE CONTROL BOX C

Next: p1639, f1640

FUSE F2

REMOVE CONTROL BOX C

Next: p1643, f1644

TRANSFORMER RESISTANCE

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: !p1647, !f1648

RUN BOILER TO MAX TEMP-DOES OVERHEAT OCCUR

ATTACH TEMPERATURE CLAMP TO FLOW PIPE
SET BOILER TEMPERATURE CONTROL TO MAX

Next: !p1789, f1989

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: !p1811, f1812

DIFFERENTIAL FLOW RETURN

TEMPERATURE CONTROL SET TO MAXIMUM
ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES

Next: !p1869, ?1870, ?1872

VOLTS FROM TURBINE

TURN HOT WATER TAP ON AND SET FLOW RATE TO APPROX. 3 LITRES PER MINUTE

Next: p1888, f1889

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR

Next: p1894, f1895

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: p3602, f1899

VOLTAGE FAN (AT PCB)

MOVE CONNECTOR ST5 U

Next: p1902, ?1906, ?2892

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p1910, !f1911

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3627, !f1913

RESISTANCE FLUE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: !p1992, !f1993

PUMP LIMPET TEST

Next: p703, !f2036

PUMP LIMPET TEST

Next: p3093, !f2050

INSPECTION PRESSURE SYSTEM

Next: p2091, !f2092

PUMP LIMPET TEST

Next: p2093, !f2094

DIFFERENTIAL PRIMARY HEAT EXCHANGER

CH TEMPERATURE CONTR

Next: p2095, !f2298

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: p2113, !f2114

DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: !p2115, !f2116

INSPECTION GAS SUPPLY TUBE

Next: p992, !f2134

PUMP RUNNING

Next: p924, f2200

PUMP HARNESS CONTINUITY

REMOVE THE ELECTRICAL CONNECTOR FROM THE PUMP AND
THE PUMP CONNECTOR ST4 FROM THE PCB

Next: !p2203, !f2204

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE C

Next: p1788, f2217

OBSERVATION GAS VALVE

Next: p2245, f2246

RESISTANCE PRETTLE GAS VALVE AND HARNESS - FURTHER INVESTIGATION

REMOVE ST9 CONNECTOR

Next: p2256, f2252

RESISTANCE PUMP AND HARNESS

REMOVE THE PUMP CONNECTOR ST4 FROM THE PCB
ENSURE PUMP SPEED SELECTOR IS SET TO POSITION 3

Next: p2257, f2258

RESISTANCE FAN AND HARNESS

DISCONNECT FAN CONNECTOR ST5 FROM THE PCB

Next: p2261, f2262

RESISTANCE TRANSFORMER

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: p2885, !f2266

RESISTANCE PUMP AND HARNESS

REMOVE THE PUMP CONNECTOR ST4 FROM THE PCB
ENSURE PUMP SPEED SELECTOR IS SET TO POSITION 3

Next: p2274, f2275

RESISTANCE FAN AND HARNESS

DISCONNECT FAN CONNECTOR ST5 FROM THE PCB

Next: p2278, f2279

RESISTANCE TRANSFORMER

REMOVE THE BACK PLATE OF THE CONTROL BOX AND THE TRANSFORMER FROM THE PCB

Next: !p2282, !f2283

EXTERNAL CONTROLS VOLTAGE (RETURN)

{GAINPCBACS}
EXTERNAL CONTROLS CALLING FOR HEAT

Next: !p2310, f2311

INTERNAL CLOCK

ANY EXTERNAL CH CONT

Next: !p3272, !f2551

INSPECTION GAS SUPPLY TUBE

Next: !p2434, !f2436

INSPECTION GAS SUPPLY TUBE

Next: !p2438, !f2439

INSPECTION GAS SUPPLY TUBE

Next: !p2447, !f2448

CHECK FLOW COMPONENTS

ISOLATE AND DRAIN TH

Next: !p2490, ?2491, ?2493, ?2495, ?2497

CONDENSATE PIPE

Next: p2689, !f2560

FAN PRESSURE TEST (IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p2561, f3209

RECTIFICATION VOLTAGE

{GAINPCBACS}

Next: !p2569, ?2571, ?2573

RESISTANCE HARNESS ELECTRODE SENSE TO EARTH

DISCONNECT CONNECTER

Next: !p2649, f2673

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p2664, !f2665

DIVERTER VALVE HARNESS CONTINUITY

DISCONNECT ST17 CONN

Next: !p2666, !f2667

VOLTAGE DIVERTER MOTOR SUPPLY PCB

NO DEMAND
PREHEAT SWITCHED OFF (ECO BUTTON ILLUMINATED)
REMOVE CONNECTOR ST17 FROM PCB

Next: p2669, !f2670

DIVERTER VALVE HARNESS CONTINUITY

DISCONNECT ST17 CONN

Next: !p2671, !f2672

INSPECTION GAS SUPPLY TUBE

Next: p2679, !f2680

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p2681, ?2683, ?2685

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p2687, !f2688

INSPECTION GAS SUPPLY TUBE

Next: p2559, !f2717

ELECTRODE SENSE HARNESS

DISCONNECT FLAME SEN

Next: p2749, !f2750

ELECTRODE SENSE

REMOVE THE ELECTRODE ASSEMBLY

Next: p2751, !f2752

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p2753, !f2754

INSPECTION GAS SUPPLY TUBE

Next: p2810, !f2811

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p2812, ?2814, ?2816

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p3251, !f2819

TEMPERATURE DHW AT BOILER

Next: p2048, !f2845

OBSERVATION ISOLATE DHW

Next: !p2847, !f2848

PRIMARY SENSOR (HIGH FLAME)

DISCONNECT PLUG (RE

Next: p2865, !f2882

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: p2205, !f2881

RESISTANCE MECHANICAL TIMER (MT 10)

Next: !p2886, !f2887

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3630, !f2895

SPARKING PRESENT TEST

REMOVE SPARK LEADS F

Next: p2897, f2898

CONDENSATE PIPE

Next: p2922, !f2923

AIR PRESSURE SWITCH (DEMAND)

Next: p2907, f3644

INSPECTION FLUE

Next: !p2920, !f2921

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p2924, !f2925

PRESSURE GAS INLET DROP

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p2926, f3043

ELECTRODE SPARK HARNESS

REMOVE THE IGNITION HARNESS CONNECTION FROM THE
ELECTRODES TOP OF THE BURNER AND FROM THE PCB

Next: p2966, !f2967

INSPECTION GAS SUPPLY TUBE

Next: p2968, !f2969

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p2970, ?2972, ?2974

INSPECTION SPARK ELECTRODE

REMOVE THE ELECTRODE ASSEMBLY

Next: p2976, !f2977

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: p2978, !f2979

INSPECTION HEAT EXCHANGER

REMOVE FAN/MANIFOLD

Next: !p2980, !f2981

RESISTANCE DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: p2899, !f2999

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
REMOVE THE GAS VALVE CONNECTORS FROM THE GAS VALVE AND MAKE SAFE

Next: p3063, f3082

FAN PRESSURE TEST (IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p3064, f3065

INSPECTION GAS SUPPLY TUBE

Next: p3078, !f3079

INSPECTION GAS SUPPLY TUBE

Next: p3068, !f3069

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p3070, ?3072, ?3074

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p3076, !f3077

RESISTANCE GAS VALVE HARNESS

REMOVE THE CONNECTOR

Next: !p3080, !f3081

RESISTANCE - PRETTLE GAS VALVE SOLENOID MAIN AND HARNESS

REMOVE ST9 CONNECTOR

Next: !p3089, f3090

RESISTANCE GAS VALVE HARNESS

REMOVE THE CONNECTOR

Next: !p3087, !f3088

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE C

Next: p3094, f3095

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: p3098, f3099

RESISTANCE SENSOR TEMP FLOW

DISCONNECT PLUG (RE

Next: !p3102, !f3103

RESISTANCE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3109, !f3110

RESISTANCE FLUE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3111, !f3112

RESISTANCE AIR PRESSURE SWITCH

DISCONNECT ONE OF THE ORANGE LEADS FROM THE AIR PRESSURE SWITCH.

Next: !p3113, !f3114

RESISTANCE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3120, !f3121

RESISTANCE FLUE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3122, !f3123

RESISTANCE AIR PRESSURE SWITCH

DISCONNECT ONE OF THE ORANGE LEADS FROM THE AIR PRESSURE SWITCH.

Next: !p3124, !f3125

RESISTANCE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3131, !f3132

RESISTANCE FLUE OH STAT

DISCONNECT ONE OF THE ORANGE LEADS FROM THE OVERHEAT STAT

Next: p3133, f3134

RESISTANCE AIR PRESSURE SWITCH

DISCONNECT ONE OF THE ORANGE LEADS FROM THE AIR PRESSURE SWITCH.

Next: !p3139, !f3140

INSPECTION HEAT EXCHANGER

REMOVE FAN/MANIFOLD

Next: !p3137, !f3138

INSPECTION DHW ISOLATION VALVE

Next: p2489, !f3153

INSPECTION DIVERTER VALVE PADDLE

REMOVE THE DIVERTER VALVE ACTUATOR FROM THE DIVERTER VALVE BODY

Next: p805, !f3160

VOLTS TO PUMP (PREHEAT)

{GAINPCBACS}
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 40°C (TO ENSURE A DEMAND FOR PREHEAT)

Next: p3176, f3177

PUMP HARNESS CONTINUITY

REMOVE THE ELECTRICAL CONNECTOR FROM THE PUMP AND
THE PUMP CONNECTOR ST4 FROM THE PCB

Next: !p3186, !f3187

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: !p3182, f3183

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p2558, !f393

VOLTS TO PUMP (PREHEAT)

{GAINPCBACS}
ENSURE PRIMARY HEAT EXCHANGER IS BELOW 40°C (TO ENSURE A DEMAND FOR PREHEAT)

Next: p3191, f3192

PUMP HARNESS CONTINUITY

REMOVE THE ELECTRICAL CONNECTOR FROM THE PUMP AND
THE PUMP CONNECTOR ST4 FROM THE PCB

Next: !p3201, !f3202

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: !p3197, f3198

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p3222, ?3223, ?3225

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p3233, !f3228

INSPECTION FLUE

Next: p2808, !f3249

INSPECTION GAS SUPPLY TUBE

Next: p3261, !f3262

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p3270, !f3264

INSPECTION CODE PLUG

LOWER THE FACIA PANEL

Next: p3333, !f3334

VOLTAGE FAN (AT PCB)

MOVE CONNECTOR ST5 U

Next: p3322, ?3323, ?3325

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p3329, !f3330

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3768, !f3328

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3722, !f3332

RESISTANCE SENSOR TEMP FLOW AND HARNESS

DISCONNECT CONNECTOR

Next: p3335, f3336

RESISTANCE DHW SENSOR AND HARNESS

DISCONNECT CONNECTOR

Next: !p3339, f3340

FAN PRESSURE TEST

ATTACH PRESSURE GAUG

Next: p3470, f3423

COMBUSTION ANALYSIS MAX AND MIN

UNCLIP DIVERTER VALVE HEAD FROM THE BODY AND LEAVE IN A SAFE POSITION

Next: p3438, ?3440, ?3442

INSPECTION FLUE

Next: p3426, !f3427

INSPECTION GAS SUPPLY TUBE

Next: p3428, !f3429

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: p3430, ?3432, ?3434

BURNER INSPECTION

REMOVE FAN/MANIFOLD ASSEMBLY
REMOVE THE BURNER/BAFFLES ASSEMBLY

Next: !p3436, !f3437

SPARKING PRESENT TEST

REMOVE SPARK LEADS F

Next: p3448, !f3449

INSPECTION GAS SUPPLY TUBE

Next: !p3446, !f3447

INSPECTION GAS SUPPLY TUBE

Next: !p3444, !f3445

CONDENSATE PIPE

Next: p3505, !f3451

INLET PRESSURE MAX OUTPUT

ATTACH PRESSURE GAU

Next: p3422, !f3503

INSPECTION FLUE OH STAT

Next: p3506, !f3507

INSPECTION GAS SUPPLY TUBE

Next: p3522, !f3509

INSPECTION ELECTRODES

REMOVE THE ELECTRODE ASSEMBLY

Next: p3510, !f3511

INSPECTION FAN MEMBRANE

REMOVE FAN ASSEMBLY FROM APPLIANCE

Next: !p3512, ?3514, ?3516

ELECTRODE SENSE HARNESS

DISCONNECT FLAME SEN

Next: p3536, !f3551

ELECTRODE SPARK HARNESS

REMOVE THE IGNITION HARNESS CONNECTION FROM THE
ELECTRODES TOP OF THE BURNER AND FROM THE PCB

Next: p3508, !f3550

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3594, !f3595

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3599, !f3600

OBSERVATION FAN TYPE

Next: p1898, f3623

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3628, !f3629

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3631, !f3632

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p3640, !f3641

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3638, !f3639

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3642, !f3643

FAN VOLTAGE CONTROL (PCB)

{GAINPCBACS}
MOVE CONNECTOR ST5 TO EXPOSE TERMINALS ON PCB

Next: p3646, ?3647, ?3649

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3676, !f3656

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3681, !f3654

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3687, !f3652

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3664, !f3665

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3680, !f3668

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3671, !f3672

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3677, !f3678

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3682, !f3683

OBSERVATION FAN TYPE

Next: p3321, f3725

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3723, !f3724

VOLTAGE FAN (PCB DEMAND)

DISCONNECT ELECTRICA

Next: p3733, !f3734

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3731, !f3732

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3735, !f3736

OBSERVATION FAN TYPE

Next: p3739, f3740

FAN VOLTAGE CONTROL (PCB)

{GAINPCBACS}
MOVE CONNECTOR ST5 TO EXPOSE TERMINALS ON PCB

Next: p3752, ?3754, ?3756

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3750, !f3751

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3748, !f3749

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3746, !f3747

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3764, !f3765

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: p3760, !f3761

RESISTANCE FAN HARNESS

DISCONNECT CONNECTOR FROM THE FAN ASSEMBLY

Next: !p3758, !f3759

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3762, !f3763

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3766, !f3767

INSPECTION FAN

REMOVE PCB FROM FAN ASSEMBLY (FOR INSTRUCTIONS CLICK HERE)

Next: !p3769, !f3770

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p3637, !f3782

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p2893, !f3781

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p3326, !f3793

VOLTAGE MAINS GND PWM AND HALL

REMOVE THE CONNECTOR

Next: p3730, !f3794

DHW SENSOR

REMOVE YELLOW WIRES FROM DHW SENSOR

Next: p678, !f674

DIFFERENTIAL PLATE HEAT EX

ATTACH TEMPERATURE C

Next: !p675, !f677

PRIMARY SENSOR (HIGH FLAME)

DISCONNECT PLUG (RE

Next: p673, !f682

PUMP LIMPET TEST

Next: p672, !f697

CH OPERATION

CH TEMPERATURE CONTROL SET TO MAX

Next: !p704, !f2300

INSPECTION VESSEL PRESSURE

CLOSE FLOW AND RETURN ISOLATION VALVES
DISCHARGE PRIMARY SYSTEM WATER

Next: !p718, !f719

INSPECTION PRESSURE SYSTEM

Next: p2009, !f760

INSPECTION PRESSURE SYSTEM

Next: p2827, !f759

INSPECTION PRESSURE SYSTEM

Next: p683, !f771

PUMP LIMPET TEST

Next: p775, !f776

PRIMARY SENSOR (HIGH FLAME)

DISCONNECT PLUG (RE

Next: p1868, !f778

INSPECTION PRESSURE SYSTEM

Next: p774, !f785

INSPECTION PRESSURE SYSTEM

Next: p152, !f804

PUMP LIMPET TEST

Next: p815, !f811

BYPASS (INTERNAL)

ENSURE RADS ARE OPEN AND WATER CAN CIRCULATE AROUND THE SYSTEM
USE AN FGA TEMPERATURE PROBE

Next: !p834, !f934

DIVERTER VALVE ACTUATOR OPERATION

REMOVE THE DIVERTER

Next: p3154, f2658

INSPECTION PRESSURE SYSTEM

Next: p2185, !f925

PUMP LIMPET TEST

Next: p2849, !f926

CONDENSATE PIPE

Next: p989, !f988

INLET PRESSURE

ATTACH PRESSURE GAUGE TO INLET PRESSURE TEST POINT ON GAS VALVE

Next: p990, !f991

FAN PRESSURE TEST (IGNITION)

ATTACH PRESSURE GAUGE TO FAN PRESSURE TEST POINT

Next: p2130, f2676

INSPECTION FLUE

Next: !p1020, !f1011

System Information

  • Total Tests: 694
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control