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 105E

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

BAXI COMBI 105E

G.C. NUMBER 47 075 0

Next: &539, !f17

DHW FLOW RATE

Next: &889, f1280

DHW BURNER IGNITION

ATTACH U-GAUGE TO GA

Next: &7, ?61, ?63, ?65, ?1182

DHW BURNER ESTABLISHED (HIGH FLAME)

ATTACH U-GAUGE TO GA

Next: &9, ?94, ?96, ?98, ?1217

DHW OPERATION

SELECTOR SWITCH TO D

Next: &10, ?137, ?139, ?141, ?1621

DHW MODULATION

SET FLOW RATE AT TAP

Next: &472, f157

CH OPERATION

SELECTOR SWITCH TO D

Next: &13, ?163, ?165, ?167, ?336

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO D

Next: &14, !f193

CH MODULATION

ATTACH A U-GAUGE TO

Next: &15, f341

RE-IGNITION DELAY

SELECTOR SWITCH TO D

Next: &16, ?1426, ?1428

PUMP OVERRUNS

SELECTOR SWITCH TO D

Next: &nff, !f196

CH IGNITION

ATTACH U-GAUGE TO GA

Next: &12, ?1402, ?1404

FAULT CODES

Next: &nff, !f536

CHOICE OF DIAGNOSTICS

PLEASE SELECT FROM O

Next: &3, !f540

DHW FAN RUNS

SELECTOR SWITCH TO D

Next: &6, ?563, ?565

50 DEGREE LIGHT

OUTSIDE MODEL

Next: &nff, f787

60 DEGREE LIGHT

OUTSIDE MODEL

Next: &nff, f811

70 DEGREE LIGHT

OUTSIDE MODEL

Next: &nff, f835

80 DEGREE LIGHT

OUTSIDE MODEL

Next: &nff, f841

30 + 40 DEGREE LIGHTS

OUTSIDE MODEL

Next: &nff, f847

30 + 50 DEGREE LIGHTS

OUTSIDE MODEL

Next: &nff, f1157

DHW DEMAND LIGHT

TURN HOT WATER TAP O

Next: &904, ?857, ?859, ?1335

OBSERVATION MAINS LED ILLUMINATED

ENSURE THE SELECTOR SWITCH IS IN HEATING AND HOT WATER MODE

Next: &856, ?890, ?892

DHW PUMP RUNS

SELECTOR SWITCH TO D

Next: &562, ?905, ?907

HEADER FOR FUSE INVESTIGATION

Next: &nff, f1370

SETTING THE MULTIMETER TO DIODE TEST

THE IMAGES BELOW SHO

Next: &nff, !f1401

NO DEMAND REC

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW BURNER ESTABLISHED

ELECTRODE - IGNITION - FRONT

Next: End

NO SPARK

SPARK GAP

Next: End

DHW BURNER ESTABLISHED

LEAD - SENSING ELECTRODE

Next: End

FAULT CODE 60 NO PUMP

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

FAULT CODE 60 PUMP RUNS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAULT CODE 60 NO PUMP

SELECTOR SWITCH

Next: End

DHW BURNER ESTABLISHED MODUREG RESISTANCE

GAS VALVE

Next: End

OVERHEAT INVESTIGATION

SYSTEM PRESSURE

Next: End

OVERHEAT INVESTIGATION

PUMP

Next: End

OVERHEAT INVESTIGATION

SENSOR - TEMPERATURE

Next: End

OVERHEAT INVESTIGATION

SENSOR - TEMPERATURE

Next: End

FAULT CODE 50 APS N/C WIRE

CABLE - FAN / PRESSURE SWITCH

Next: End

BOILER AND RADIATORS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 2

RETURN FILTER

Next: End

BOILER TO TEMP RADS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

PUMP PROVING SWITCH 2

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 4

RETURN FILTER

Next: End

OVERHEAT INVESTIGATION

TAP - ISOLATION - FLOW / RETURN

Next: End

DHW BURNER ESTABLISHED

SENSOR - TEMPERATURE

Next: End

FAULT CODE 50 FAN DOES NOT RUN 30 AND 50 DEGREE FAULT CODE

PIPE - PRESSURE SWITCH

Next: End

FAULT CODE 50 FAN DOES NOT RUN 30 AND 50 DEGREE FAULT CODE

VENTURI - PRESSURE SENSING

Next: End

FAULT CODE 30 + 50

FAN

Next: End

RESTRICTED OR BLOCKED 3

RETURN FILTER

Next: End

GAS VALVE TOOK PCB OUT

PCB AND GAS VALVE

Next: End

GAS VALVE TOOK PCB OUT 2

PCB AND GAS VALVE

Next: End

DHW FAN RUNS

SENSOR - TEMPERATURE

Next: End

DHW FAN RUNS

SENSOR - TEMPERATURE

Next: End

FAN RUNS

SYSTEM PRESSURE

Next: End

PUMP PROVING SWITCH

TAP - ISOLATION - FLOW / RETURN

Next: End

CH SPINDLE

PUMP

Next: End

RESTRICTED OR BLOCKED

RETURN FILTER

Next: End

DHW FAN RUNS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

LOCK OUT RESET

SELECTOR SWITCH

Next: End

FAULT CODE 50

PCB

Next: End

NO SPARK

HEAT EXCHANGER - PRIMARY

Next: End

LOW POWER TO FAN ASSEMBLY

PCB

Next: End

FAULTY

SWITCH - AIR PRESSURE

Next: End

FAULTY

PIPE - PRESSURE SWITCH

Next: End

POOR AIR FLOW

HEAT EXCHANGER - PRIMARY

Next: End

RESTRICTED OR BLOCKED

VENTURI - PRESSURE SENSING

Next: End

RESTRICTED OR BLOCKED

FLUE

Next: End

POOR AIR FLOW 2

HEAT EXCHANGER - PRIMARY

Next: End

LOW POWER TO FAN ASSEMBLY 2

PCB

Next: End

RESTRICTED OR BLOCKED

PIPE ASSEMBLY - BYPASS

Next: End

RESTRICTED OR BLOCKED 2

PIPE ASSEMBLY - BYPASS

Next: End

DHW FAN RUNS

THERMOSTAT LIMIT

Next: End

FILTER

FILTER - DHW

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR/FILTER

Next: End

INSUFFICIENT

WATER SUPPLY

Next: End

POOR DHW

HEAT EXCHANGER - PRIMARY

Next: End

NOT OPENING TO CH

HYDRAULIC OUTLET ASSEMBLY

Next: End

FAULT CODE 70

CABLE - LOW VOLTAGE

Next: End

DHW SENSOR

CABLE - LOW VOLTAGE

Next: End

OVERHEAT INVESTIGATION

GAS VALVE

Next: End

RESTRICTED OR BLOCKED 5

RETURN FILTER

Next: End

OVERHEATING

HEAT EXCHANGER - PRIMARY

Next: End

EARTH LEAKAGE

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

EARTH LEAKAGE 2

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

EARTH LEAKAGE 3

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

EARTH LEAKAGE 4

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

EARTH LEAKAGE 5

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

BLOWING FUSE

PUMP

Next: End

FUSE BLOWING

FAN

Next: End

BLOWING FUSE

GAS VALVE

Next: End

FAULTY DIODES

GAS VALVE LEAD

Next: End

FAULTY DIODES

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

SHORTED

GAS VALVE LEAD

Next: End

SHORTED

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

BLOWN

FUSE (MAINS)

Next: End

DHW PUMP RUNS

FUSE 2A 250V

Next: End

BLANK FOR SETTING METER TO DIODE SETTING

Z BLANK FOR FUSE INVESTIGATION

Next: End

NO IGNITION

SELECTOR SWITCH

Next: End

CH IGNITION NO IGNITION TIMER LINK

PCB

Next: End

CH IGNITION

TIMER LINK (NO CLOCK)

Next: End

NO CLOCK IN VOLTS

PCB

Next: End

NO IGNITION

TIMER (CLOCK)

Next: End

NOT RAMPING UP ON CH

SENSOR - TEMPERATURE

Next: End

NOT RAMPING UP ON CH

THERMOSTAT CONTROLS

Next: End

FAULT CODE 80

SELECTOR SWITCH

Next: End

FAULT CODE 70

SELECTOR SWITCH

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

SYSTEM PRESSURE

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

TAP - ISOLATION - FLOW / RETURN

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

PUMP

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

SENSOR - TEMPERATURE

Next: End

OVERHEATING80 DEG OVERHEAT

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

GAS VALVE

Next: End

DHW DEMAND ENDSFAULT CODE 30 + 40

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW PUMP RUNSFAULT CODE 30 + 40

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

DHW PUMP RUNSFAULT CODE 30 + 40

PIPE - PRESSURE - NEGATIVE / POSITIVE

Next: End

DHW VENTURIFAULT CODE 30 + 40

HYDRAULIC VENTURI ASSEMBLY

Next: End

NO DEMAND RECFAULT CODE 30 + 40

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

EARTH LEAKAGE 2FAULT CODE 30 + 40

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

RESTRICTED OR BLOCKED 580 DEG OVERHEAT

RETURN FILTER

Next: End

FAULT CODE 70 - FAULTING DURING OPERATION

SENSOR - TEMPERATURE

Next: End

DHW RUNS HOT COLD

PUMP

Next: End

DHW RUNS HOT COLD

SENSOR - TEMPERATURE

Next: End

DHW RUNS HOT COLD

SENSOR - TEMPERATURE

Next: End

DHW NOISY

PUMP

Next: End

FAULT CODE 60

PCB

Next: End

DHW RUNS HOT COLD

HEAT EXCHANGER - PRIMARY

Next: End

FAULT CODE 80DHW PUMP RUNS

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

FAULT CODE 80DHW PUMP RUNS

PIPE - PRESSURE - NEGATIVE / POSITIVE

Next: End

FAULT CODE 80DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

FAULT CODE 80NO DEMAND REC

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAULT CODE 80

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

FAULT CODE 80DHW DEMAND ENDS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW IGNITION

GAS VALVE COMPENSATION TUBE

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

BURNER IGNITION PRESSURE LOW OR DIES OUT

GAS INLET PRESSURE

Next: End

CH OPERATION

SENSOR - TEMPERATURE

Next: End

CH IGNITION

GAS VALVE COMPENSATION TUBE

Next: End

EARTH LEAKAGE 6

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

BURNER PRESSURE EXC

GAS VALVE COMPENSATION TUBE

Next: End

SPARK NO GAS

GAS VALVE COMPENSATION TUBE

Next: End

CH NOISY DHW OK

PUMP

Next: End

CH NOISY DHW OK

PIPE ASSEMBLY - BYPASS

Next: End

SYSTEM PRESSURE VESSEL

EXPANSION VESSEL

Next: End

PUMP OVERRUNS

PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

FLAME SENSE POSITION

FLAME SENSE POSITION

Next: End

AUTO FROST

SENSOR - TEMPERATURE

Next: End

DHW MODULATION

SENSOR - TEMPERATURE

Next: End

CH MODULATION

SENSOR - TEMPERATURE

Next: End

FOR FAULT CODES

DUMMY FOR OBJECTS

Next: End

CHOICE OF DIAGNOSTICS

DUMMY FOR OBJECTS

Next: End

DHW FAN RUNS

PIPE - PRESSURE SWITCH

Next: End

DHW FAN RUNS

VENTURI - PRESSURE SENSING

Next: End

DHW BURNER ESTABLISHED BURNER IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

HEAT EXCHANGER - PRIMARY

Next: End

DHW FAN RUNS

FLUE

Next: End

BURNER PRESSURE LOW

SENSOR - TEMPERATURE

Next: End

TEMP LOW RADS COLD

SENSOR - TEMPERATURE

Next: End

DHW COLD RADS COLD

THERMOSTAT CONTROLS

Next: End

DHW OPERATION

MANIFOLD - BURNER

Next: End

DHW OPERATION

PIPE ASSEMBLY - BYPASS

Next: End

NO IGNITION2

SELECTOR SWITCH

Next: End

CH IGNITION NO IGNITION TIMER LINK2

PCB

Next: End

CH IGNITION2

TIMER LINK (NO CLOCK)

Next: End

NO CLOCK IN VOLTS2

PCB

Next: End

NO IGNITION2

TIMER (CLOCK)

Next: End

FAULT CODE 50 FAN DOES NOT RUN

PIPE - PRESSURE SWITCH

Next: End

FAULT CODE 50 FAN DOES NOT RUN

VENTURI - PRESSURE SENSING

Next: End

FAULT CODE 50 NOT PROVING IN N/O

SWITCH - AIR PRESSURE

Next: End

FAULT CODE 50 FAN RUNS

PIPE - PRESSURE SWITCH

Next: End

FAULT CODE 50 FAN RUNS

VENTURI - PRESSURE SENSING

Next: End

FAULT CODE 50

FLUE

Next: End

FAULT CODE 60

SYSTEM PRESSURE

Next: End

FAULT CODE 60

PUMP

Next: End

FAULT CODE 80

SENSOR - TEMPERATURE

Next: End

FAULT CODE 30 + 40

THERMOSTAT LIMIT

Next: End

DHW DEMAND ENDS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW PUMP RUNS

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

DHW PUMP RUNS

SENSOR - TEMPERATURE

Next: End

DHW PUMP RUNS

SELECTOR SWITCH

Next: End

SPARK GAS PRESENT NO IGNITION

SPARK GAP

Next: End

DHW BURNER IGNITION

SWITCH - AIR PRESSURE

Next: End

DHW BURNER IGNITION NO SPARKING APS WIRES

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

PIPE - PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

VENTURI - PRESSURE SENSING

Next: End

DHW BURNER IGNITION

FLUE

Next: End

NO SPARK

PCB

Next: End

OVERHEAT THERMOSTAT RESISTANCE

LEAD - IGNITION ELECTRODE

Next: End

NO SPARK COMBINED SPG

PCB

Next: End

NO SPARK COMBINED SPG

LEAD - IGNITION ELECTRODE

Next: End

DHW BURNER IGNITION

GAS INLET PRESSURE

Next: End

DHW PUMP RUNS

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

DHW PUMP RUNS

PIPE - PRESSURE - NEGATIVE / POSITIVE

Next: End

DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

MECHANICAL 2

GAS VALVE

Next: End

FAULT CODE 60

HYDRAULIC OUTLET ASSEMBLY

Next: End

FAULT CODE 60 NO PUMP

PUMP

Next: End

FAULT CODE 60 PUMP DOES NOT RUN

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAULT CODE 60 PUMP DOES NOT RUN

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

DHW BURNER IGNITION NO SPARK

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

FAULT CODE 50 NO SPARK

PCB

Next: End

NO IGNITION SPARKING PRESENT

GAS VALVE LEAD (SPARK GENERATOR)

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

FAULT CODE 50 APS N/O WIRES 30 AND 50 DEGREE FAULT CODE

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 50 NOT PROVING IN N/C 30 AND 50 DEGREE FAULT CODE

SWITCH - AIR PRESSURE

Next: End

FAULT CODE 30 + 50

PCB

Next: End

FAULT 1

GAS VALVE LEAD

Next: End

NO IGNITON NO OUTPUT FROM PCB - SEPARATE SPARK GEN

PCB

Next: End

NO IGNITION NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

DHW FAN RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

FAN RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

DHW FAN RUNS

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

DHW FAN RUNS

PCB

Next: End

NO POWER TO FAN

CABLE - FAN / PRESSURE SWITCH

Next: End

NO POWER TO FAN 2

CABLE - FAN / PRESSURE SWITCH

Next: End

POOR AIR FLOW

FAN

Next: End

FAULT CODE 60

HEAT EXCHANGER - PRIMARY

Next: End

BLOCKED NO FAN

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT STAT SECTION

CABLE - FAN / PRESSURE SWITCH

Next: End

OVERHEAT STAT SECTION 2

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 30 + 40

PCB

Next: End

DHW FLOW RATE

HEAT EXCHANGER 16 PLATES - DHW

Next: End

PASSING TO RADS

HYDRAULIC OUTLET ASSEMBLY

Next: End

DHW TEMPERATURE LOW RADIATORS COLD

HEAT EXCHANGER 16 PLATES - DHW

Next: End

CHBOILER5 TO TEMP RADS COLD

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

FAULT CODE 70

SENSOR - TEMPERATURE

Next: End

DHW PUMP RUNS

SENSOR - TEMPERATURE

Next: End

OVERHEAT INVESTIGATION

PCB

Next: End

OUT OF CALIBRATION CUTTING OUT EARLY

THERMOSTAT LIMIT

Next: End

OVERHEAT INVESTIGATION

OVERHEAT

Next: End

OVERHEATING

HEAT EXCHANGER 16 PLATES - DHW

Next: End

MAINS LED FLASHING

PCB

Next: End

EARTH LEAKAGE

GAS VALVE

Next: End

MAINS LED FLASHING 2

PCB

Next: End

EARTH LEAKAGE 2

GAS VALVE

Next: End

MAINS LED FLASHING 3

PCB

Next: End

EARTH LEAKAGE 3

GAS VALVE

Next: End

MAINS LED FLASHING 4

PCB

Next: End

EARTH LEAKAGE 4

GAS VALVE

Next: End

MAINS LED FLASHING 5

PCB

Next: End

EARTH LEAKAGE 5

GAS VALVE

Next: End

FAULT CODE 60DHW PUMP RUNS

PCB

Next: End

EARTH LEAKAGE

GAS VALVE LEAD

Next: End

EARTH LEAKAGE 2

GAS VALVE LEAD

Next: End

EARTH LEAKAGE 3

GAS VALVE LEAD

Next: End

EARTH LEAKAGE 4

GAS VALVE LEAD

Next: End

EARTH LEAKAGE 5

GAS VALVE LEAD

Next: End

FUSE BLOWING

CABLE SELECTOR SWITCH / PUMP

Next: End

BLOWING FUSE

CABLE - FAN / PRESSURE SWITCH

Next: End

PCB BLOWING FUSE 2

PCB FUSE INVESTIGATION

Next: End

PCB BLOWING FUSE

PCB FUSE INVESTIGATION

Next: End

DHW PUMP RUNS

Next: End

FUSE INVESTIGATION

Z BLANK FOR FUSE INVESTIGATION

Next: End

FUSE INVESTIGATION (APPLIANCE)

Z BLANK FOR FUSE INVESTIGATION

Next: End

CH IGNITION

EXT CONTROLS OR LINK

Next: End

NO IGNITION

PCB

Next: End

NO IGNITION CLOCK OK

PCB

Next: End

NOT RAMPING UP ON CH

PCB

Next: End

RE-IGNITION DELAY

PCB

Next: End

NOT RE FIRING FOR CH

PCB

Next: End

FAULT CODE 80

PCB

Next: End

FAULT CODE 70

PCB

Next: End

OVERHEATING80 DEG OVERHEAT

HEAT EXCHANGER 16 PLATES - DHW

Next: End

DHW DEMAND ENDSFAULT CODE 30 + 40

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

DHW DEMAND ENDSFAULT CODE 30 + 40

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

SERVICE KITFAULT CODE 30 + 40

VALVE - DHW FLOW

Next: End

DHW DEMAND LIGHT STUCK ONFAULT CODE 30 + 40

PCB

Next: End

DHW DEMAND ENDSFAULT CODE 30 + 40

CABLE - LOW VOLTAGE

Next: End

DHW MODULATION

PCB

Next: End

DHW PUMP RUNSFAULT CODE 30 + 40

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

MAINS LED FLASHING 2FAULT CODE 30 + 40

PCB

Next: End

EARTH LEAKAGE 2FAULT CODE 30 + 40

GAS VALVE

Next: End

EARTH LEAKAGE 2FAULT CODE 30 + 40

GAS VALVE LEAD

Next: End

FAULT CODE 80 NO FAULT OVERHEAT

SENSOR - TEMPERATURE

Next: End

DHW RUNS HOT COLD

PCB

Next: End

DHW RUNS HOT COLD

HEAT EXCHANGER 16 PLATES - DHW

Next: End

FAULT CODE 60

Z BLANK FOR FUSE INVESTIGATION

Next: End

FAULT CODE 70

Z BLANK FOR FUSE INVESTIGATION

Next: End

FAULT CODE 80DHW PUMP RUNS

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

FAULT CODE 80MAINS LED FLASHING

PCB

Next: End

FAULT CODE 80 EARTH LEAKAGE

GAS VALVE

Next: End

FAULT CODE 80EARTH LEAKAGE

GAS VALVE LEAD

Next: End

FAULT CODE 80DHW DEMAND END

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

FAULT CODE 80DHW DEMAND ENDS

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

FAULT CODE 80SERVICE KIT

VALVE - DHW FLOW

Next: End

FAULT CODE 80 DHW DEMAND LIGHT STUCK ON

PCB

Next: End

FAULT CODE 80DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

MODULATING SOLENOID

GAS VALVE

Next: End

EARTH LEAKAGE 6

GAS VALVE

Next: End

EARTH LEAKAGE 6

GAS VALVE LEAD

Next: End

FAN RUNS THEN STOPS

PCB

Next: End

MINIMUM SET WRONG ON MODUREG

GAS VALVE

Next: End

DHW BURNER ESTABLISHED

PCB

Next: End

AUTO FROST

PCB

Next: End

CH MODULATION

PCB

Next: End

DHW OPERATION

HEAT EXCHANGER 16 PLATES - DHW

Next: End

CH NOISY DHW OK

Next: End

DHW FAN RUNS

SWITCH - AIR PRESSURE

Next: End

DHW FAN RUNS

FAN

Next: End

DHW BURNER ESTABLISHED BURNER IGNITES BUT BAFFLES OUT

GAS VALVE

Next: End

DHW COLD RADS COLD

PCB

Next: End

DHW OPERATION

HEAT EXCHANGER - PRIMARY

Next: End

CH IGNITION2

EXT CONTROLS OR LINK

Next: End

NO IGNITION2

PCB

Next: End

NO IGNITION CLOCK OK2

PCB

Next: End

FAULT CODE 50 APS N/O WIRES

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 50 NOT PROVING IN N/C

SWITCH - AIR PRESSURE

Next: End

FAULT CODE 50 DOES NOT RUN

FAN

Next: End

FAULT CODE 50 RUNNING SLOW

FAN

Next: End

FAULT CODE 60 PUMP RUNS

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

FAULT CODE 60 PUMP RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

FAULT CODE 80

CABLE - LOW VOLTAGE

Next: End

DHW DEMAND ENDS

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

DHW DEMAND ENDS

DIAPHRAGM - PRESSURE DIFFERENTIAL VALVE

Next: End

SERVICE KIT

VALVE - DHW FLOW

Next: End

DHW DEMAND LIGHT STUCK ON

PCB

Next: End

DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

MAINS LED NOT ILLUMINATED

PCB

Next: End

SELECTOR SWITCH

SELECTOR SWITCH

Next: End

DHW PUMP RUNS

CABLE - PCB INPUT

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

DHW BURNER IGNITION

MANIFOLD - BURNER

Next: End

SENSOR CH

CABLE - LOW VOLTAGE

Next: End

DHW FAN RUNS APS WIRES

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

ELECTRODE - IGNITION - FRONT

Next: End

DHW BURNER IGNITION

FAN

Next: End

DHW BURNER IGNITION

IGNITOR C/W LEAD

Next: End

DHW PUMP RUNS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW PUMP RUNS

VALVE - DHW FLOW (DHW SPINDLE)

Next: End

BURNER IGNITES BUT BURNER PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p1736

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1202

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1204

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1206

BURNER IGNITES PRESSURE STARTS TO RAMP UP BUT THEN DROPS OUT AND RE IGNITES

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p1218

BOILER CONTINUES TO HEAT PAST 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1313

BOILER OVERHEATS BELOW 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1315

HOT WATER LIGHT FLASHES WITH DEMAND

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1337

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p352

DHW TEMPERATURE LOW RADIATORS REMAIN COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p622

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH IGNITION

Next: p1406

BURNER IGNITES BUT PRESSURE DOES NOT BEHAVE AS DESCRIBED

CHARACTERISTIC TEST FROM CH IGNITION

Next: p1718

DHW TEMPERATURE LOW RADIATORS HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p1292

NO RE IGNITION DELAY

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1427

APPLIANCE AND SYSTEM COOL AND DOES NOT RE FIRE

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1429

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1566

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1571

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1573

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1597

DHW RUNS HOT COLD

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1622

BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1102

BOILER UP TO TEMPERATURE RADIATORS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p166

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1656

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1675

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1680

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1682

Fires with no demand

CHARACTERISTIC TEST FROM CH OPERATION

Next: p338

Fan does not run

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p564

Fan runs then stops

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p1264

NO SPARKING PRESENT

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p940

Sparking present, ZERO OR LOW GAS PRESSURE PRESENT

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p978

Sparking, gas PRESENT BUT NO IGNITION

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p66

BOILER STILL NOISY

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: p1629

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH IGNITION

Next: p766

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p825

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p827

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1023

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p858

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p991

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p877

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p879

MAINS LED FLASHING

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p1325

MAINS LED NOT ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p893

PUMP PULSES ON AND OFF

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p1342

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p908

PRESSURE LOW OR DIES OUT

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p1700

Burner ignites but baffles out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p603

BURNER IGNITES, SPARK CONTINUES, BOILER GOES TO LOCKOUT

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p99

05/06/2018 13:33:45 1805_1_50_1 20/07/2018 13:55:54

06/07/2018 11:07:50

Next: End

MAINS LED FLASHING#############

PCB

Next: End

VOLTAGE GAS VALVE AT PCB COMBINED SPARK GEN

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAXIMUM

Next: !p1085, f1179

PUMP VOLTS DHW

{GAINPCBACS}
SELE

Next: !p1025, f1026

PRIMARY FLOW SWITCH OC

REMOVE THE RED LEADS FROM THE CH DIFFERENTIAL
PRESSURE SWITCH AND MAKE SAFE

Next: p1047, f1028

CH SPINDLE RETRACTED

Next: !p1029, f1030

CH DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: !p1031, !f1032

RESISTANCE HARNESS APS (N/O)

{GAINPCBACS}
DISCONNECT A2 FROM THE PCB
DISCONNECT THE BLUE WIRE FROM THE APS

Next: !p1076, !f1077

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: p1082, f1019

RESISTANCE AIR PRESSURE SWITCH & HARNESS (NC)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p1168, f1159

RESISTANCE APS AT APS (NC)

DISCONNECT THE LEADS FROM THE AIR PRESSURE SWITCH, MAKE A NOTE OF CONNECTIONS

Next: !p1160, f1161

AIR PRESSURE SWITCH TUBES

Next: p1162, !f1163

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p1177, !f1178

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p1180, !f1181

VOLTAGE FAN AT PCB

{GAINPCBACS}
SELE

Next: !p1213, f1186

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1187, !f1188

INSPECTION SYSTEM PRESSURE

Next: p1193, !f1194

VOLTAGE FAN AT PCB 50 DEGREE LIGHT

{GAINPCBACS}
SELE

Next: !p1215, !f1216

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: !p1272, !f1271

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

REMOVE CONNECTOR A2 FROM THE PCB

Next: !p1279, f849

WATER SUPPLY TO PREMISES

TURN ON A COLD WATER TAP

Next: p1286, !f1291

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1294, !f1295

INSPECTION 3 WAY VALVE OPERATION

DISCHARGE AND DRAIN THE HOT WATER CIRCUIT

Next: !p1297, !f1298

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1321, !f1322

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1328, f1354

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1333, f1357

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1340, f1360

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1345, f1363

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1350, f1366

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1355, !f1356

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1358, !f1359

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1361, !f1362

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1364, !f1365

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1367, !f1368

RESISTANCE PUMP AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A4 FROM THE PCB

Next: p1372, f1371

RESISTANCE PUMP FUSE INVESTIGATION

REMOVE THE COVER FROM THE PUMP ASSEMBLY
REMOVE THE WIRES FROM THE PUMP ASSEMBLY

Next: !p1373, !f1374

RESISTANCE FAN FUSE INVESTIGATION

DISCONNECT LIVE AND NEUTRAL LEADS FROM THE FAN

Next: !p1377, !f1378

DIODE TEST GAS VALVE HARNESS FUSE INVESTIGATION (COMBINED)

REMOVE THE CONNECTOR

Next: p1385, !f1386

RESISTANCE FUSE MAINS

GAIN ACCESS TO THE MAINS FUSE FOR THE APPLIANCE

Next: !p1393, f1394

FUSE FURTHER INVESTIGATION (MAINS)

Next: !p1395, !f1396

FUSE FURTHER INVESTIGATION (APPLIANCE)

Next: !p1398, !f1399

EXTERNAL CONTROLS/RTC INPUT

{GAINPCBACS}
SELE

Next: !p1409, !f1410

TIMER LINK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1413, !f1414

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1433, !f1434

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1438, !f1439

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1553, !f1554

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p1569, ?1570, ?1572

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: !p158, !f350

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p1576, !f1577

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1600, !f1601

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1610, f1611

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1612, !f1613

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1636, !f1641

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1659, !f1660

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1669, f1670

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1671, !f1672

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p1678, ?1679, ?1681

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p1685, !f1686

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1731, f1732

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: !p1733, !f1734

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p342, !f351

AIR PRESSURE SWITCH TUBES

Next: p571, !f572

EXTERNAL CONTROLS/RTC INPUT

{GAINPCBACS}
SELE

Next: !p769, !f770

TIMER LINK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p773, !f774

DHW FAN RUNS

SELECTOR SWITCH TO D

Next: p1241, f789

RESISTANCE HARNESS AND APS (N/C)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p790, f791

AIR PRESSURE SWITCH RESISTANCE

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p792, f793

AIR PRESSURE SWITCH TUBES

Next: p794, !f795

DHW PUMP RUNS (60 DEGREE)

SELECTOR SWITCH TO D

Next: p812, f1024

SYSTEM WATER PRESSURE

Next: p1121, !f819

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1435, f837

RESISTANCE HARNESS DHW SENSOR

REMOVE CONNECTOR A5 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DHW THERMISTOR

Next: !p1299, !f1300

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1430, f843

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p844, !f845

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL
DHW TEMPERATURE SELECTOR TO MAX

Next: p1062, f1275

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: !p1274, !f851

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p875, ?876, ?878

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p886, !f885

MAINS POWER SUPPLY

Next: p896, f1392

FUSE (2 AMP) RESISTANCE

REMOVE FUSE FROM FUSE HOLDER LOCATED IN THE MAIN TERMINAL BLOCK

Next: !p900, f1397

PRIMARY FLOW SWITCH OC

REMOVE THE RED LEADS FROM THE CH DIFFERENTIAL
PRESSURE SWITCH AND MAKE SAFE

Next: p911, f912

CH SPINDLE RETRACTED

Next: !p987, f914

CH DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: !p915, !f916

RESISTANCE HARNESS DHW SENSOR

REMOVE CONNECTOR A5 FROM THE PCB
REMOVE THE CONNECTOR FROM THE DHW THERMISTOR

Next: !p1301, !f1302

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p923, !f924

AIR PRESSURE SWITCH RESISTANCE

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p939, f570

RESISTANCE HARNESS APS (N/O)

{GAINPCBACS}
DISCONNECT A2 FROM THE PCB
DISCONNECT THE BLUE WIRE FROM THE APS

Next: p945, !f946

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: p968, f973

SPARK GENERATOR (INPUT) COMBINED SPARK GEN

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAXIMUM

Next: p974, !f975

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p994, !f995

FLAME SENSE LEAD

Next: p310, !f103

VOLTAGE GAS VALVE AT GAS VALVE

{GAINPCBACS}
SELE

Next: !p1018, f1078

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1353, !f1049

RESISTANCE MODULATING SOLENOID

REMOVE THE BLACK LEADS FROM THE MODULATING SOLENOID

Next: p226, !f1061

INSPECTION PRESSURE SYSTEM

Next: p1137, !f1064

PUMP LIMPET

Next: p1065, !f1066

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1067, !f1068

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1304, !f1070

VOLTAGE GAS VALVE AT PCB SEPARATE SPARK GEN

{GAINPCBACS}
SELE

Next: !p1175, f1176

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p164, !f1108

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1110, !f1111

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p175, !f1118

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1120, !f1171

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p818, !f1133

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1258, !f1136

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1440, !f1149

VENTURI

Next: !p1164, !f1165

RESISTANCE FAN

DISCONNECT LIVE AND NEUTRAL LEADS FROM THE FAN

Next: !p1169, !f1170

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1189, !f1190

CH SPINDLE

SELECTOR SWITCH IN O

Next: p1191, f1192

CH DEMAND MICROSWITCH OPERATION

REMOVE THE RED LEADS FROM THE CH DIFFERENTIAL PRESSURE SWITCH AND MAKE SAFE

Next: p1209, !f1210

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1195, !f1196

PUMP LIMPET

Next: p1197, !f1198

INSPECTION CH DIFFERENTIAL VALVE

DRAIN APPLIANCE PRIM

Next: p1199, ?1201, ?1203, ?1205

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1261, !f1208

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1211, !f1212

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}

Next: p1224, !f1225

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p957, !f1223

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1226, !f1227

AIR PRESSURE SWITCH TUBES

Next: p1228, !f1229

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1230, !f1231

VENTURI

Next: p1232, !f1233

FLUE

Next: !p1234, !f1235

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p806, !f1240

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}

Next: p788, !f1257

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p1259, !f1260

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p1262, !f1263

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1728, f1269

DHW INLET FILTER

DHW CIRCUIT OF APPLIANCE DRAINED AND DISCHARGED.

Next: p1287, !f1288

DHW FLOW RESTRICTOR/FILTER

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1289, !f1290

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p1306, f1320

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1308, !f1307

OBSERVATION RUN BOILER UP TO TEMPERATURE

CH TEMPERATURE SELEC

Next: p1317, ?1312, ?1314

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1319, !f1318

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1326, f1327

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1331, f1332

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1338, f1339

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1343, f1344

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1348, f1349

RESISTANCE FAN AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1375, f1376

RESISTANCE GAS VALVE FUSE INVESTIGATION

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: p1379, !f1380

OBSERVATION IS SEPARATE SPARK GENERATOR FITTED

IS THE SINGLE COMBIN

Next: p1381, f1382

DIODE TEST GAS VALVE HARNESS FUSE INVESTIGATION (SEPARATE)

REMOVE THE CONNECTOR

Next: p1383, !f1384

RESISTANCE GAS VALVE HARNESS FUSE INVESTIGATION SEPARATE SPARK GEN)

REMOVE CONNECTOR A1 FROM THE PCB

Next: !p1391, !f1388

RESISTANCE GAS VALVE HARNESS FUSE INVESTIGATION COMBINED SPARK GEN)

REMOVE CONNECTOR A1 FROM THE PCB

Next: !p1389, !f1390

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1421, !f1423

EXTERNAL CONTROLS/RTC OUTPUT

{GAINPCBACS}
SELE

Next: p1407, f1408

CLOCK FITTED

Next: p1411, f1412

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1417, !f1418

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1415, !f1416

CLOCK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB
SET CLOCK TO OFF POSITION

Next: !p1419, !f1420

INSPECTION PCB THERMOSTAT CONTROLS

Next: !p1422, !f1424

OBSERVATION BOILER RESET (CH SENSOR)

DHW TEMPERATURE SELECTOR TO MAX

Next: p1474, f1432

OBSERVATION BOILER RESET (DHW SENSOR)

Next: p1618, f1437

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1063, ?1565, ?1596

INSPECTION PRESSURE SYSTEM

Next: p1475, !f1476

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1477, !f1478

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1479, ?1655, ?1674

PUMP LIMPET

Next: p1492, !f1493

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1550, !f1495

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p1551, f1552

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1615, !f1556

OPERATION DIFFERENTIAL VALVE DHW

Next: p1567, f1568

RESISTANCE DHW MICROSWITCH AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p1574, f1575

DHW DEMAND

Next: p1598, f1599

DHW DEMAND MICROSWITCH OPERATION

REMOVE THE GREEN LEADS FROM THE DHW FLOW PRIORITY PRESSURE SWITCH

Next: p1606, !f1607

DHW SENSING PIPES

BOILER DRAINED AND DISCHARGED

Next: p1602, !f1603

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1604, !f1605

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1608, f1609

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1616, !f1617

OBSERVATION RUN BOILER ON DHW

DHW TEMPERATURE SELECTOR TO MAX

Next: !p1640, !f1620

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1623, !f1628

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1624, !f1627

PUMP LIMPET TEST

Next: p1626, !f1625

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: !p1634, f1635

PUMP LIMPET TEST

Next: p763, !f1633

PUMP LIMPET TEST

Next: p169, !f170

DHW DEMAND

Next: p1657, f1658

DHW DEMAND MICROSWITCH OPERATION

REMOVE THE GREEN LEADS FROM THE DHW FLOW PRIORITY PRESSURE SWITCH

Next: p1665, !f1666

DHW SENSING PIPES

BOILER DRAINED AND DISCHARGED

Next: p1661, !f1662

DHW SPINDLE

Next: p1113, f1296

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1663, !f1664

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1667, f1668

OPERATION DIFFERENTIAL VALVE DHW

Next: p1676, f1677

RESISTANCE DHW MICROSWITCH AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p1683, f1684

PUMP LIMPET TEST

Next: p187, !f188

INSPECTION COMPENSATION PIPE

Next: p95, !f1699

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1109, !f172

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p1687, !f1714

INSPECTION COMPENSATION PIPE

Next: p1405, !f1724

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1735, f1730

INSPECTION COMPENSATION PIPE

Next: !p1737, !f1738

INSPECTION COMPENSATION PIPE

Next: p1017, !f1753

PUMP LIMPET TEST

Next: p1116, !f197

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p414, !f190

MODULATING SOLENOID VOLTAGE

{GAINPCBACS}
SELE

Next: !p1717, !f228

FLAME SENSE POSITION

Next: !p311, !f312

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p339, !f340

CH OPERATION

SELECTOR SWITCH TO D

Next: !p353, ?759, ?761

RESISTANCE HARNESS AND APS (N/C)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p569, f933

FAN VOLTS

SELECTOR SWITCH TO O

Next: !p575, f1184

VENTURI

Next: !p573, !f574

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p604, !f605

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p606, !f607

INSPECTION FLUE

Next: !p608, !f609

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1055, !f619

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p623, f1293

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p625, !f626

INSPECTION PCB THERMOSTAT CONTROLS

Next: p627, !f628

INSPECTION BURNER MANIFOLD

REMOVE BURNER ASSEMBLY

Next: !p629, !f630

SPARK ELECTRODE GAP

Next: !p92, !f93

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p764, !f765

EXTERNAL CONTROLS/RTC OUTPUT

{GAINPCBACS}
SELE

Next: p767, f768

CLOCK FITTED

Next: p771, f772

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p777, !f778

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p775, !f776

CLOCK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB
SET CLOCK TO OFF POSITION

Next: !p779, !f780

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p800, !f801

FAN VOLTS 50 DEGREE LIGHT

SELECTOR SWITCH TO O

Next: !p798, f1214

VENTURI

Next: !p796, !f797

OBSERVATION SPARKING WITH APS PROVEN

CONNECT THE AIR PRESSURE SWITCH CHARGE KIT TO +VE CONNECTION ON THE AIR PRESSURE SWITCH.

Next: p802, f1075

AIR PRESSURE SWITCH TUBES

Next: p804, !f805

VENTURI

Next: p1236, !f807

FLUE

Next: !p808, !f809

CH SPINDLE

SELECTOR SWITCH IN O

Next: p816, f817

CH DEMAND MICROSWITCH OPERATION

REMOVE THE RED LEADS FROM THE CH DIFFERENTIAL PRESSURE SWITCH AND MAKE SAFE

Next: p830, !f1045

PUMP LIMPET

Next: p820, !f821

INSPECTION CH DIFFERENTIAL VALVE

DRAIN APPLIANCE PRIM

Next: p1134, ?824, ?826, ?828

OBSERVATION BOILER OPERATION (60 DEGREE)

DHW TEMPERATURE SELECTOR TO MAX

Next: !p1638, !f1639

OPERATION DIFFERENTIAL VALVE DHW

Next: p873, f874

RESISTANCE DHW MICROSWITCH AND HARNESS

{GAINPCBACS}
DISCONNECT CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p880, f883

POWER TO CONTROL BOARD

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: !p894, f895

SELECTOR SWITCH VOLTAGE

SELECTOR SWITCH TO OFF POSITION

Next: !p898, f899

PUMP VOLTS DHW

{GAINPCBACS}
SELE

Next: !p909, f910

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p917, f918

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p921, f922

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: p1347, !f926

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p941, !f942

OBSERVATION SPARKING WITH APS PROVEN

CONNECT THE AIR PRESSURE SWITCH CHARGE KIT TO +VE CONNECTION ON THE AIR PRESSURE SWITCH.

Next: p943, f944

AIR PRESSURE SWITCH TUBES

Next: p955, !f956

SPARK GENERATOR (OUTPUT)

REMOVE THE LEAD FROM

Next: p947, f961

SPARK ELECTRODE GAP

Next: !p953, !f1022

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p610, !f116

VENTURI

Next: p1219, !f958

FLUE

Next: !p959, !f960

SPARK GENERATOR (INPUT) SEPARATE SPARK GEN

{GAINPCBACS}
SELE

Next: p969, !f970

ELECTRODE LEAD

REMOVE THE ELECTRODE LEAD

Next: !p971, !f972

ELECTRODE LEAD

REMOVE THE ELECTRODE LEAD

Next: !p1046, !f977

GAS INLET PRESSURE

ATTACH U-GAUGE TO GA

Next: p1739, !f980

FLAME SENSE ELECTRODE

Next: p100, !f101

DHW DEMAND

Next: p992, f993

DHW DEMAND MICROSWITCH OPERATION

REMOVE THE GREEN LEADS FROM THE DHW FLOW PRIORITY PRESSURE SWITCH

Next: p1330, !f1001

DHW SENSING PIPES

BOILER DRAINED AND DISCHARGED

Next: p996, !f997

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p998, !f999

System Information

  • Total Tests: 639
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control