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:

FERROLI MODENA 80E

WARNING - IMPORTA

Next: &2, *

NO FAULT FOUND

Next: nff

FERROLI MODENA 80E

{ISOLATEMAINSPOWER}<

Next: &445, !f3

FAULT DETAILS

Next: &nff, ?7, ?9, ?13, ?302

JUMPER SETTINGS

{ISOLATEMAINSPOWER}
GAIN ACCESS TO THE PCB (USE INSULATION MAT AS NECESSARY)

Next: &5, !f446

FROST PROTECTION INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FROST PROTECTION INVESTIGATION

Next: &nff, f680

FUSE INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f880

FAULT 3

CH SENSOR

Next: End

FAULT 4

CH SENSOR

Next: End

FAULT 3

FAN SCROLL

Next: End

FAULT 3

AIR PRESSURE SWITCH TUBES

Next: End

FAULT 3

VENTURI

Next: End

ADJ FAULT 3

GAS VALVE

Next: End

FAULT 2

FLUE (INTAKE)

Next: End

FAULT 3

BURNER

Next: End

FAULT 2

HEAT EXCHANGER GAS/WATER - FLUEWAYS

Next: End

FAULT 1

DHW SENSOR

Next: End

FAULT 4

GAS INLET PRESSURE

Next: End

TEMP SENSE DHW FUNCTION FAULT 1

PCB

Next: End

FAULT 2

INJECTORS

Next: End

FAULT 1

FLOW RESTRICTOR

Next: End

FAULT 2

DHW SENSOR

Next: End

FAULT 1

DHW INLET FILTER

Next: End

FAULT 3

DHW SENSOR

Next: End

REDIRECT 1

REDIRECT 1

Next: o271-f255, *

FAULT 1

DHW JUMPER

Next: End

ADJ FAULT 4

GAS VALVE

Next: End

ADJ FAULT 5

GAS VALVE

Next: End

FAULT 3

INJECTORS

Next: End

FAULT 1

ELECTRICAL SAFETY CHECKS

Next: End

PUMP FUNCTION 1

PCB

Next: End

FAULT 1

PUMP HARNESS

Next: End

FAULT 2

PUMP

Next: End

JUMPERS

JUMPERS

Next: End

FAULT 1

Next: End

FAULT 1

CH SENSOR

Next: End

FAULT 2

GAS INLET PRESSURE

Next: End

FAULT 2

CH SENSOR

Next: End

FAULT 2

FAN SCROLL

Next: End

FAULT 2

AIR PRESSURE SWITCH TUBES

Next: End

FAULT 2

VENTURI

Next: End

FAULT 2

ELECTRODE FLAME SENSE

Next: End

ADJ FAULT 2

GAS VALVE

Next: End

FAULT 3

FLUE (INTAKE)

Next: End

FAULT 2

BURNER

Next: End

ADJ FAULT 1

GAS VALVE

Next: End

FAN VOLT FUNCTION FAULT 1

PCB

Next: End

FAULT 1

FAN SCROLL

Next: End

FAULT 1

AIR PRESSURE SWITCH TUBES

Next: End

FAULT 1

VENTURI

Next: End

FAULT 1

HEAT EXCHANGER GAS/WATER - FLUEWAYS

Next: End

FAULT 1

DHW LIMIT THERMOSTAT

Next: End

FAULT 1 NOT IGNITING

ELECTRODE FLAME SENSE

Next: End

NO VOLTAGE TO FLOW SWITCH

PCB

Next: End

FAULTY

HARNESS

Next: End

NORMAL OPERATION

FROST PROTECTION

Next: End

FROST PROTECTION

CH SENSOR

Next: End

FROST PROTECTION

DHW SENSOR

Next: End

NO VOLTAGE TO APS

PCB

Next: End

APS SECTION

HARNESS

Next: End

MFAULT 5

AIR PRESSURE SWITCH TUBES

Next: End

MFAULT 5

VENTURI

Next: End

FLUE 2

FLUE

Next: End

RESTRICTED / BLOCKED

HEAT EXCHANGER GAS/WATER - FLUEWAYS

Next: End

DIRTY / RESTRICTED

FAN SCROLL

Next: End

SYSTEM PRESSURE SWITCH

SYSTEM PRESSURE SWITCH

Next: End

DAMAGING SENSOR

WATER LEAK

Next: End

CAUSING DROPPING OUT

CH SENSOR

Next: End

CORRODED OR DAMAGED

KIT HARNESS SENSORS

Next: End

CORRODED OR DAMAGED 2

KIT HARNESS SENSORS

Next: End

CAUSING DROPPING OUT

DHW SENSOR

Next: End

SFAULT 1NOT IGNITING

GAS VALVE

Next: End

NO AC TO GAS VALVE

PCB

Next: End

NO DC TO GAS VALVE

PCB

Next: End

SFAULT 3NOT IGNITING

GAS INLET PRESSURE

Next: End

SFAULT 1NOT IGNITING

ELECTRODE IGNITION

Next: End

SFAULT 4NOT IGNITING

BURNER

Next: End

FAN SECTION

HARNESS

Next: End

FAULT 3

Next: End

FAULT 47

AIR PRESSURE SWITCH TUBES

Next: End

FAULT 47

VENTURI

Next: End

FLUE

FLUE

Next: End

FAULT 2

CH LIMIT THERMOSTAT

Next: End

BLANK FOR FUSE INVESTIGATION

Z REDIRECTS

Next: End

BLOWING FUSE

GAS VALVE

Next: End

BLOWING FUSE

PUMP

Next: End

FAULT 3 NO CH ONLY

Next: End

FAULT 1

CH LIMIT THERMOSTAT

Next: End

FAULT 5

CH SENSOR

Next: End

BLANK FOR MAINS FUSE INVESTIGATION

Z REDIRECTS

Next: End

STUCK ON

Next: End

STUCK ON

TIME CLOCK

Next: End

NOT RESPONDING TO CH

PCB

Next: End

NO POWER TO TIMER

PCB

Next: End

NO POWER TO TIMER 2

PCB

Next: End

NOT RESPONDING TO CH 2

PCB

Next: End

FLUE 3

FLUE

Next: End

CH NOISYPUMP FUNCTION 1

PCB

Next: End

CH NOISYFAULT 1

PUMP HARNESS

Next: End

CH NOISYFAULT 2

PUMP

Next: End

CH NOISYFAULT 1

Next: End

CH NOISY OVERGASSED

GAS VALVE

Next: End

CH NOISY

CH SENSOR

Next: End

PCB PUMP OVERRUN

PCB (PUMP OVERRUN)

Next: End

FAULT 3

FAN ASSEMBLY

Next: End

FAN VOLT FUNCTION FAULT 3

PCB

Next: End

FAULT 3

AIR PRESSURE SWITCH

Next: End

FAULT 3

FLUE

Next: End

FAULT 2

GAS VALVE

Next: End

FAULT 1

HEAT EXCHANGER GAS/WATER

Next: End

TEMP SENSE DHW FUNCTION FAULT 2

PCB

Next: End

FAULT 2

HEAT EXCHANGER GAS/WATER

Next: End

DHW TEMP CONTROL FUNCTION FAULT 1

PCB

Next: End

FAULT 3

HEAT EXCHANGER GAS/WATER

Next: End

FAULT 1

PUMP

Next: End

FAULT 1

Next: End

TEMP SENSE PRIMARY FUNCTION 1

PCB

Next: End

FAULT 1

Next: End

FAULT 4

FAN ASSEMBLY

Next: End

FAULT 1

GAS INLET PRESSURE

Next: End

FAULT 2

FAN ASSEMBLY

Next: End

FAN VOLT FUNCTION FAULT 2

PCB

Next: End

FAULT 2

AIR PRESSURE SWITCH

Next: End

FLAME SENSE FUNCTION 2

PCB

Next: End

FAULT 1

FAN ASSEMBLY

Next: End

FAULT 1

AIR PRESSURE SWITCH

Next: End

FAULT 1

FLUE

Next: End

MGAS VALVE FUNCTION FAULT 2

PCB

Next: End

FLAME SENSE FUNCTION 1 NOT IGNITING

PCB

Next: End

FAULT 1

FLOW SWITCH ASSEMBLY

Next: End

MFAULT 5

AIR PRESSURE SWITCH

Next: End

DROPPING OUT

PCB

Next: End

GAS VALVE SECTION

HARNESS

Next: End

SFAULT 1NOT IGNITING

GAS VALVE

Next: End

SFAULT 1NOT IGNITING

INJECTORS

Next: End

EXCESSIVE RESISTANCE

FAN ASSEMBLY

Next: End

EXTERNAL CONTROLS SECTION

Next: End

CH FUNCTION FAULT 4

PCB

Next: End

FAULT 47

AIR PRESSURE SWITCH

Next: End

BLOWN

FUSE PCB

Next: End

GAS VALVE SECTION FUSE

HARNESS

Next: End

PCB BLOWING FUSE

PCB

Next: End

PUMP SECTION BLOWING FUSE

HARNESS

Next: End

EXTERNAL CONTROLS SECTION NO CH ONLY

Next: End

CH FUNCTION FAULT 2

PCB

Next: End

BLOWN

FUSE (MAINS INPUT)

Next: End

FROST PROTECTION INCORRECTLY

PCB

Next: End

FROST PROTECTION INCORRECTLY 2

PCB

Next: End

STUCK ON 2

Next: End

TIMER SECTION AND EXTERNAL CONTROLS

Next: End

FAULT 2

TIME CLOCK

Next: End

FAULT 2 2

TIME CLOCK

Next: End

TIMER SECTION AND EXTERNAL CONTROLS 2

Next: End

LIFTING OFF

BURNER

Next: End

CH NOISYFAULT 1

PUMP

Next: End

CH NOISY - NOT SHUTTING DOWN

PCB

Next: End

CH NOISYFAULT 1

Next: End

FAN DOES NOT RUN WITH A DEMAND FOR DHW OR CH DEMAND

CHARACTERISTIC TEST FROM FAULT DETAILS

Next: p785

Fan does not run

CHARACTERISTIC TEST FROM BOILER FIRES RADS DO NOT HEAT

Next: p889

Boiler does not react to DHW demand

CHARACTERISTIC TEST FROM BOILER FIRES AND ESTABLISHES DHW COOL

Next: p214

DHW too hot

CHARACTERISTIC TEST FROM BOILER FIRES AND ESTABLISHES DHW COOL

Next: p216

Kettling, noisy operation

CHARACTERISTIC TEST FROM BOILER FIRES AND ESTABLISHES DHW COOL

Next: p269

FAN RUNS BUT BURNER DOES NOT IGNITE AND ESTABLISH ON BOTH DHW AND CH

CHARACTERISTIC TEST FROM FAULT DETAILS

Next: p303

CH noisy operation

CHARACTERISTIC TEST FROM BOILER FIRES RADS DO NOT HEAT

Next: p950

Burner ignites, sparking ceases but burner baffles, lifts off or dies

CHARACTERISTIC TEST FROM BOILER FIRES AND ESTABLISHES DHW COOL

Next: p508

Burner lifts off

CHARACTERISTIC TEST FROM WHAT EFFECT OCCURRED

Next: p512

Burner pressure dies away

CHARACTERISTIC TEST FROM WHAT EFFECT OCCURRED

Next: !p514

Unable to determine actual type of burner outage

CHARACTERISTIC TEST FROM WHAT EFFECT OCCURRED

Next: p516

Burner ignites, establishes, shuts down and attempts to re-ignite

CHARACTERISTIC TEST FROM BURNER ESTABLISHES

Next: p58

Fan runs but sparking does not occur

CHARACTERISTIC TEST FROM WHERE DOES THE FAULT LIE

Next: p631

BURNER IGNITES AND SPARKING CONTINUES UNTIL BURNER SHUTS DOWN

CHARACTERISTIC TEST FROM WHERE DOES THE FAULT LIE

Next: p649

FAN RUNS SPARKING PRESENT BUT BURNER DOES NOT IGNITE

CHARACTERISTIC TEST FROM WHERE DOES THE FAULT LIE

Next: p749

Fault only on central heating

CHARACTERISTIC TEST FROM FAULT DETAILS

Next: p8

Fault only on hot water

CHARACTERISTIC TEST FROM FAULT DETAILS

Next: p10

05/02/2018 15:22:04 1801_1_50_1 06/03/2018 13:34:15

07/02/2018 11:20:39

Next: End

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p133, f134

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: !p135, !f136

FAN SCROLL CONDITION

{ISOLATEMAINSPOWER}

Next: p139, !f140

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p247, !f248

DHW INLET FILTER

{ISOLATEMAINSPOWER}
MAINS WATER SUPPLY OFF
APPLIANCE DRAINED AND DISCHARGED

Next: !p260, !f261

PUMP VOLTS

{ISOLATEMAINSPOWER}<

Next: p37, !f38

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: !p48, !f47

MAINS POWER SUPPLY

{ISOLATEMAINSPOWER}
GAIN ACCESS TO INCOMING MAINS TERMINAL STRIP

Next: p856, f484

MAINS POWER SUPPLY FUSE

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE APPLIANCE MAINS POWER SUPPLY I.E. FUSED SPUR

Next: !p485, f913

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p521, f522

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: !p523, !f524

FAN SCROLL CONDITION

{ISOLATEMAINSPOWER}

Next: p527, !f528

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p549, !f550

FAN SCROLL CONDITION

{ISOLATEMAINSPOWER}

Next: p553, !f554

VOLTAGE DC SUPPLY TO FLOW SWITCH

CH TEMPERATURE SWITCH TO MINIMUM
DHW TEMPERATURE SWITCH TO MAXIMUM

Next: p675, !f676

TEMPERATURE APPLIANCE

{ISOLATEMAINSPOWER}

Next: p682, !f681

VOLTAGE APS SUPPLY

EXTERNAL CONTROLS CA

Next: p712, !f713

GAS VALVE RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE THE CONNECTOR PLUG FROM THE GAS VALVE

Next: !p771, !f770

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p779, !f780

RESISTANCE FAN HARNESS

{ISOLATEMAINSPOWER}<

Next: !p812, !f813

OBSERVATION INTEGRAL TIMER FITTED

Next: !p840, f927

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p848, !f849

FURTHER INVESTIGATION FUSE

Next: !p877, !f878

RESISTANCE GAS VALVE AND HARNESS AND TO EARTH

{ISOLATEMAINSPOWER}
REMOVE THE 4 WIRE CONNECTOR FROM X6 ON THE PCB

Next: p881, f883

RESISTANCE PUMP

{ISOLATEMAINSPOWER}
REMOVE COVER FROM PUMP ASSEMBLY

Next: !p887, !f888

RESISTANCE GAS VALVE AND TO EARTH

{ISOLATEMAINSPOWER}
REMOVE THE CONNECTOR PLUG FROM THE GAS VALVE

Next: !p884, !f885

OBSERVATION INTEGRAL TIMER FITTED

Next: !p894, f937

FURTHER INVESTIGATION FUSE MAINS

Next: !p914, !f915

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}
DISCONNECT EXTERNAL CONTROLS AND MAKE SAFE

Next: !p921, f923

RESISTANCE INTEGRAL TIMER - FIRING WITH NO DEMAND

{ISOLATEMAINSPOWER}<

Next: !p924, !f925

RESISTANCE TIMER DEMAND

{ISOLATEMAINSPOWER}
REMOVE WIRES FROM TERMINALS 3 AND 5 ON TIMER AND MAKE SAFE
TIMER SET TO ON

Next: p931, f934

VOLTAGE AC TIMER

Next: !p935, !f936

RESISTANCE TIMER DEMAND

{ISOLATEMAINSPOWER}
REMOVE WIRES FROM TERMINALS 3 AND 5 ON TIMER AND MAKE SAFE
TIMER SET TO ON

Next: p938, f939

VOLTAGE AC TIMER

Next: !p940, !f941

PUMP VOLTS

{ISOLATEMAINSPOWER}<

Next: p953, !f954

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: !p971, !f972

IS DHW OPERATION SATISFACTORY?

CH TEMPERATURE SWITCH TO MINIMUM
DHW TEMPERATURE SWITCH TO MAXIMUM

Next: p223, ?213, ?215, ?268, ?507

FAN RUNS HIGH SPEED

EXTERNAL CONTROLS CA

Next: p131, f132

AIR PRESSURE SWITCH PROVED (VOLTAGE AT PCB)

{ISOLATEMAINSPOWER}<

Next: p137, f138

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p145, !f146

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p141, !f142

VENTURI AIR FLOW

{ISOLATEMAINSPOWER}

Next: !p143, !f144

FLUE (INTAKE)

Next: p147, !f148

BURNER

{ISOLATEMAINSPOWER}

Next: p149, !f150

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: !p151, !f152

BURNER ESTABLISH

EXTERNAL CONTROLS CA

Next: p22, ?57

DHW FLOW RATE

Next: p254, f255

DHW FLOW RATE

Next: p263, !f270

BOILER TEMPERATURE

EXTERNAL CONTROLS CA

Next: p24, f46

DHW FLOW RATE

Next: p242, !f253

PUMP RUNS

EXTERNAL CONTROLS CA

Next: p41, f36

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (BLUE WIRES) FROM THE DHW SENSOR

Next: p243, !f244

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p245, f246

GAS RATE

Next: !p251, !f252

GAS VALVE VOLTAGE (DHW)

{ISOLATEMAINSPOWER}<

Next: !p249, !f250

VOLTAGE DC FROM FLOW SWITCH

{ISOLATEMAINSPOWER}<

Next: p256, f674

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (BLUE WIRES) FROM THE DHW SENSOR

Next: !p258, !f259

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (BLUE WIRES) FROM THE DHW SENSOR

Next: p272, !f266

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p281, !f282

DHW JUMPER SETTING

{ISOLATEMAINSPOWER}

Next: p275, !f274

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: !p280, !f277

GAS RATE

Next: !p283, !f284

DHW AND CH OPERATION

CH TEMPERATURE SWITC

Next: p733, ?629, ?642, ?652

PUMP HARNESS

{ISOLATEMAINSPOWER}

Next: !p39, !f40

PUMP LIMPET TEST (CH)

Next: p42, !f43

EXTERNAL BYPASS

Next: !p44, !f45

FAN VOLTAGE

{ISOLATEMAINSPOWER}<

Next: !p497, f482

EXTERNAL CONTROLS RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR X4 FROM THE PCB

Next: p841, f835

HOW IS THE BURNER REACTING?

EXTERNAL CONTROLS CA

Next: p509, ?511, ?513, ?515

FAN RUNS HIGH SPEED

EXTERNAL CONTROLS CA

Next: p547, f548

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p541, !f542

GAS INLET PRESSURE

{ISOLATEMAINSPOWER}<

Next: p517, !f518

FAN RUNS HIGH SPEED

EXTERNAL CONTROLS CA

Next: p519, f520

AIR PRESSURE SWITCH PROVED (VOLTAGE AT PCB)

{ISOLATEMAINSPOWER}<

Next: p525, f526

FLAME SENSE ELECTRODE AND GAP

{ISOLATEMAINSPOWER}

Next: p533, !f534

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p529, !f530

VENTURI AIR FLOW

{ISOLATEMAINSPOWER}

Next: !p531, !f532

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p535, !f536

FLUE

Next: p537, !f538

BURNER

{ISOLATEMAINSPOWER}

Next: !p539, !f540

FLUE

Next: !p947, !f948

AIR PRESSURE SWITCH PROVED (VOLTAGE AT PCB)

{ISOLATEMAINSPOWER}<

Next: p551, f552

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: !p559, !f560

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p555, !f556

VENTURI AIR FLOW

{ISOLATEMAINSPOWER}

Next: !p557, !f558

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: p130, !f126

DHW LIMIT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE THE BLUE WIRE FROM THE CH LIMIT THERMOSTAT

Next: p632, !f633

AIR PRESSURE SWITCH PROVED (VOLTAGE AT PCB)

{ISOLATEMAINSPOWER}<

Next: !p634, f704

FLAME SENSE ELECTRODE AND GAP

{ISOLATEMAINSPOWER}

Next: !p650, !f651

VOLTAGE AC GAS VALVE

{ISOLATEMAINSPOWER}<

Next: p772, !f773

RESISTANCE HARNESS DHW FLOW SWITCH

{ISOLATEMAINSPOWER}<

Next: !p677, !f678

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: p683, !f684

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (BLUE WIRES) FROM THE DHW SENSOR

Next: p916, !f685

RESISTANCE HARNESS APS

{ISOLATEMAINSPOWER}<

Next: p715, !f714

AIR PRESSURE SWITCH TUBES

{ISOLATEMAINSPOWER}

Next: p716, !f717

VENTURI AIR FLOW

{ISOLATEMAINSPOWER}

Next: p722, !f719

FLUE

Next: !p720, !f721

FAN SCROLL CONDITION

{ISOLATEMAINSPOWER}

Next: p727, !f732

HEAT EXCHANGER FLUE WAYS

{ISOLATEMAINSPOWER}

Next: p718, !f731

RESISTANCE LOW PRESSURE SWITCH

{ISOLATEMAINSPOWER}<

Next: p737, !f736

RESISTANCE HARNESS CH SENSOR

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR X4 FROM THE PCB
REMOVE CONNECTOR FROM CH SENSOR

Next: p740, !f743

INSPECTION WATER LEAK FROM LOW PRESSURE SWITCH

{ISOLATEMAINSPOWER}

Next: p735, !f739

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: p744, !f742

RESISTANCE HARNESS DHW SENSOR

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR X4 FROM THE PCB
REMOVE CONNECTOR FROM CH SENSOR

Next: p745, !f746

DHW SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (BLUE WIRES) FROM THE DHW SENSOR

Next: !p747, !f748

RESISTANCE GAS VALVE AND HARNESS

{ISOLATEMAINSPOWER}<

Next: p654, f769

VOLTAGE DC GAS VALVE

{ISOLATEMAINSPOWER}<

Next: p776, !f774

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p777, f778

SPARK ELECTRODE AND GAP

{ISOLATEMAINSPOWER}

Next: p781, !f782

BURNER

{ISOLATEMAINSPOWER}

Next: !p783, !f784

RESISTANCE FAN AND HARNESS

{ISOLATEMAINSPOWER}
REMOVE 6 WIRE CONNECTOR FROM X6 ON PCB

Next: p451, f811

CH OPERATION

EXTERNAL CONTROLS CA

Next: p15, ?20, ?449

OBSERVATION LINK EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: p483, !f834

CH LIMIT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE THE BLUE WIRE FROM THE CH LIMIT THERMOSTAT

Next: p842, !f855

AIR PRESSURE SWITCH (N/O)

{ISOLATEMAINSPOWER}
REMOVE THE BROWN WIRE FROM THE AIR PRESSURE SWITCH

Next: !p846, f847

VENTURI AIR FLOW

{ISOLATEMAINSPOWER}

Next: p850, !f851

FLUE

Next: !p852, !f853

RESISTANCE FUSE PCB

{ISOLATEMAINSPOWER}
REMOVE THE FUSE FROM THE PCB

Next: p814, f876

RESISTANCE PUMP AND HARNESS AND TO EARTH

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR X3 FROM THE PCB

Next: !p886, f882

OBSERVATION LINK EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}<

Next: p890, !f891

EXTERNAL CONTROLS RESISTANCE

{ISOLATEMAINSPOWER}
REMOVE CONNECTOR X4 FROM THE PCB

Next: p908, f893

CH LIMIT THERMOSTAT

{ISOLATEMAINSPOWER}
REMOVE THE BLUE WIRE FROM THE CH LIMIT THERMOSTAT

Next: p909, !f910

CH SENSOR RESISTANCE

{ISOLATEMAINSPOWER}
DISCONNECT THE PLUG CONNECTOR (RED WIRES) FROM THE CH SENSOR

Next: !p911, !f912

OBSERVATION INTEGRAL TIMER FITTED

Next: p917, f918

OBSERVATION DISCONNECT EXTERNAL CONTROLS

{ISOLATEMAINSPOWER}
DISCONNECT EXTERNAL CONTROLS AND MAKE SAFE

Next: !p919, !f920

TIME CLOCK/TIME CLOCK LINK

{ISOLATEMAINSPOWER}<

Next: !p932, !f933

TIME CLOCK/TIME CLOCK LINK

{ISOLATEMAINSPOWER}<

Next: !p942, !f943

PUMP RUNS

EXTERNAL CONTROLS CA

Next: p951, f952

PUMP LIMPET TEST (CH)

Next: p961, !f958

PUMP HARNESS

{ISOLATEMAINSPOWER}

Next: !p955, !f956

EXTERNAL BYPASS

Next: p966, !f960

BURNER PRESSURE

{ISOLATEMAINSPOWER}<

Next: p957, !f965

BOILER TEMPERATURE (SHUT OFF AT MAX)

EXTERNAL CONTROLS CA

Next: p973, f970

OBSERVATION PUMP OVERRUN

EXTERNAL CONTROLS CA

Next: !p974, !f975

System Information

  • Total Tests: 309
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control