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 105 HE

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

BAXI COMBI 105 HE

Next: &539, !f17

HOT WATER FLOW RATE

Next: &1279, f1721

DHW BURNER IGNITION

SLACKEN THE UPPER TE

Next: &7, ?61, ?63, ?65, ?1501

HOT WATER BURNER ESTABLISHED

SLACKEN THE UPPER TE

Next: &9, ?94, ?96, ?98, ?1626

HOT WATER OPERATION

SELECTOR SWITCH TO D

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

BURNER MODULATION ON HOT WATER DEMAND

SET FLOW RATE AT TAP

Next: &472, f157

CENTRAL HEATING OPERATION

SELECTOR SWITCH TO D

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

SYSTEM PRESSURE RISE

SELECTOR SWITCH TO D

Next: &14, !f193

CENTRAL HEATING MODULATION

SLACKEN THE UPPER TE

Next: &15, f341

RE-IGNITION DELAY

SELECTOR SWITCH TO D

Next: &16, ?1861, ?1863

PUMP OVERRUNS

SELECTOR SWITCH TO D

Next: &nff, !f196

CENTRAL HEATING IGNITION

SLACKEN THE UPPER TE

Next: &12, ?1837, ?1839

FAULT CODES

Next: &nff, !f930

CHOICE OF DIAGNOSTICS

PLEASE SELECT FROM O

Next: &3, !f929

60 DEGREE LIGHT

Next: &nff, f941

70 DEGREE LIGHT

Next: &nff, f1008

80 DEGREE LIGHT

Next: &nff, f1013

30 AND 40 LIGHTS

Next: &nff, f1413

FAN RUNS ON HOT WATER DEMAND

SELECTOR SWITCH TO D

Next: &6, ?1109, ?1111

OBSERVATION MAINS LED ILLUMINATED

ENSURE THE SELECTOR SWITCH IS IN HEATING AND HOT WATER MODE

Next: &1294, ?1280, ?1282

DEMAND LIGHT LIT WITH TAP RUNNING

TURN HOT WATER TAP O

Next: &1322, ?1295, ?1297, ?1781

PUMP RUNNING ON DEMAND

SELECTOR SWITCH TO D

Next: &1108, ?1323, ?1325

30 + 50 DEGREE LIGHTS

BLANK PAGE

Next: &nff, f1561

50 DEGREE LIGHT

Next: &nff, f1423

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK, HEADER FOR FUSE INVESTIGATION

Next: &nff, f1799

SETTING THE MULTIMETER TO DIODE TEST

THE IMAGES BELOW SHO

Next: &nff, !f1828

FAULT CODE 80

SENSOR - TEMPERATURE

Next: End

CH OPERATION

SENSOR - TEMPERATURE

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PCB

Next: End

DHW FAN RUNS

THERMOSTAT - LIMIT

Next: End

BURNER PRESSURE NOT RAMPING UP

SENSOR - TEMPERATURE

Next: End

CH SPINDLE NOT MAKING60 DEGREE LIGHT

SYSTEM PRESSURE

Next: End

FAN DOES NOT RUN60 DEGREE LIGHT

PUMP

Next: End

DHW FAN RUNS60 DEGREE LIGHT

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW TOO COOL

SENSOR - TEMPERATURE

Next: End

PCB - CONTROL KNOB ALIGNMENT

PCB - CONTROL KNOB ALIGNMENT

Next: End

DHW OPERATION

MANIFOLD - BURNER

Next: End

DHW OP NOISE NO TIMER

PCB

Next: End

DHW OP NOISE

TIMER LINK (NO CLOCK)

Next: End

NO CLOCK IN VOLTS DHW OP

PCB

Next: End

DHW OP

TIMER (CLOCK)

Next: End

NO POWER TO EXTERNAL CONTROLS

Next: End

DHW PUMP RUNS

SERVICE KIT - DIAPHRAGM DHW

Next: End

DHW PUMP RUNS

PIPE - PRESSURE - POSITIVE / NEGATIVE

Next: End

DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

NO DEMAND REC

MICROSWITCH ASSEMBLY - FLOW VALVE

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

SWITCH SELECTOR

Next: End

DHW FAN RUNS

AIR PRESSURE SWITCH TUBES

Next: End

DHW FAN RUNS

VENTURI

Next: End

DHW BURNER IGNITION

SWITCH - PRESSURE

Next: End

DHW BURNER IGNITION NO SPARKING APS WIRES

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

NO SPARK

PCB

Next: End

OVERHEAT THERMOSTAT RESISTANCE

LEAD - IGNITION ELECTRODE

Next: End

NO SPARK

SPARK GAP

Next: End

DHW BURNER IGNITION

AIR PRESSURE SWITCH TUBES

Next: End

DHW BURNER IGNITION

FLUE

Next: End

BAFFLES OUT

FLUE

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

FAULT CODE 30AND40

THERMOSTAT - LIMIT

Next: End

FAULT CODE 50 FAN DOES NOT RUN

AIR PRESSURE SWITCH TUBES

Next: End

FAULT CODE 50 FAN DOES NOT RUN

VENTURI

Next: End

FAULT CODE 50 NOT PROVING IN N/O

SWITCH - PRESSURE

Next: End

FAULT CODE 50 FAN RUNS

AIR PRESSURE SWITCH TUBES

Next: End

FAULT CODE 50

FLUE

Next: End

FAULT CODE 50 NO SPARKING APS WIRES

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

DHW BURNER ESTABLISHED MODULATING SOLENOID

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

GAS VALVE TOOK PCB OUT

PCB AND GAS VALVE

Next: End

BOILER AND RADS ONLY GET WARM

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 2

FILTER RETURN

Next: End

BOILER TO TEMP RADS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 3

FILTER RETURN

Next: End

PUMP PROVING 2

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 4

FILTER RETURN

Next: End

OVERHEAT

TAP - ISOLATION - FLOW / RETURN

Next: End

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

AIR PRESSURE SWITCH TUBES

Next: End

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

VENTURI

Next: End

FAULT CODE 30 + 50

FAN

Next: End

FAN DOES NOT RUN

SENSOR - TEMPERATURE

Next: End

CH SPINDLE NOT MAKING

SYSTEM PRESSURE

Next: End

PUMP PROVING SWITCH

TAP - ISOLATION - FLOW / RETURN

Next: End

FAN DOES NOT RUN

PUMP

Next: End

RESTRICTED OR BLOCKED

FILTER RETURN

Next: End

DHW FAN RUNS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAN NOT RUNNING

SWITCH SELECTOR

Next: End

FAULT CODE 50

PCB

Next: End

NOT MAKING APS

HEAT EXCHANGER - PRIMARY - FLUE WAYS

Next: End

DHW BURNER IGNITION DROPPING OUT

SWITCH - PRESSURE

Next: End

DHW BURNER IGNITION DROPPING OUT

AIR PRESSURE SWITCH TUBES

Next: End

NOT MAKING APS DROPPING OUT

HEAT EXCHANGER - PRIMARY - FLUE WAYS

Next: End

DHW BURNER IGNITION DROPPING OUT

FLUE

Next: End

VOLTAGE DROPPING TO FAN

PCB

Next: End

VOLTAGE DROPPING TO FAN 2

PCB

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

50 DEGREE FAULT LIGHT

HEAT EXCHANGER - PRIMARY - FLUE WAYS

Next: End

BLOCKED CAUSING FLOW SWITCH TO NOT MAKE

PIPE ASSEMBLY - BYPASS

Next: End

BLOCKED CAUSING FLOW SWITCH NOT TO MAKE 2

PIPE ASSEMBLY - BYPASS

Next: End

POOR FLOW RATE

WATER SUPPLY PRESSURE

Next: End

POOR SUPPLY

TAP - ISOLATION - DHW

Next: End

DHW FLOW RATE

FILTER - DHW

Next: End

DHW FLOW RATE

FILTER - DHW

Next: End

NOT OPENING TO CH PROPERLY

HYDRAULIC OUTLET ASSEMBLY

Next: End

FAULT CODE 70

CABLE - LOW VOLTAGE

Next: End

DHW SENSOR

CABLE - LOW VOLTAGE

Next: End

DHW FAN RUNS - HW SENSOR

CABLE - LOW VOLTAGE

Next: End

RESTRICTED WATERWAYS

SECONDARY HEAT EXCHANGER

Next: End

OVERHEAT INVESTIGATION

GAS VALVE

Next: End

RESTRICTED OR BLOCKED 5

FILTER RETURN

Next: End

RESTRICTED WATERWAYS 2

SECONDARY HEAT EXCHANGER

Next: End

EARTH LEAKAGE

CABLE - GAS VALVE / IGNITER

Next: End

EARTH LEAKAGE 2

CABLE - GAS VALVE / IGNITER

Next: End

EARTH LEAKAGE 3

CABLE - GAS VALVE / IGNITER

Next: End

EARTH LEAKAGE 4

CABLE - GAS VALVE / IGNITER

Next: End

EARTH LEAKAGE 5

CABLE - GAS VALVE / IGNITER

Next: End

BLOWING FUSE

PUMP

Next: End

BLOWING FUSE

FAN

Next: End

BLOWING FUSE

GAS VALVE

Next: End

BLOWING FUSE

CABLE - GAS VALVE / IGNITER

Next: End

BLOWING FUSE 2

CABLE - GAS VALVE / IGNITER

Next: End

BLANK FOR SETTING METER TO DIODE TEST

Z DUMMY

Next: End

DHW PUMP RUNS

FUSE 2A 250V

Next: End

BLOWN

FUSE MAINS

Next: End

NO VOLTAGE TO EXTERNAL CONTROLS

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 CH

PCB - CONTROL KNOB ALIGNMENT

Next: End

FAULT CODE 80

SWITCH SELECTOR

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

SYSTEM PRESSURE

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

TAP - ISOLATION - FLOW / RETURN

Next: End

CH NOISY DHW OK

PUMP

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

PUMP

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

SENSOR - TEMPERATURE

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

GAS VALVE

Next: End

RESTRICTED OR BLOCKED 580 DEG OVERHEAT

FILTER RETURN

Next: End

CH NOISY DHW OK

PIPE ASSEMBLY - BYPASS

Next: End

FAULT CODE 80

SECONDARY HEAT EXCHANGER

Next: End

FAULT CODE 70

SWITCH SELECTOR

Next: End

FAULT CODE 70 - FAULTING DURING OPERATION

SENSOR - TEMPERATURE

Next: End

SYSTEM PRESSURE VESSEL

EXPANSION VESSEL

Next: End

PUMP OVERRUNS

PCB

Next: End

FAULT CODE 30 + 40DHW PUMP RUNS

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 30 + 40DHW PUMP RUNS

PIPE - PRESSURE - POSITIVE / NEGATIVE

Next: End

FAULT CODE 30 + 40DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

FAULT CODE 30 + 40EARTH LEAKAGE 2 3

CABLE - GAS VALVE / IGNITER

Next: End

FAULT CODE 80 DHW PUMP RUNS

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 80 DHW PUMP RUNS

PIPE - PRESSURE - POSITIVE / NEGATIVE

Next: End

FAULT CODE 80 DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

FAULT CODE 80 EARTH LEAKAGE 2 3

CABLE - GAS VALVE / IGNITER

Next: End

FAULT CODE 30 + 40 DHW DEMAND ENDS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAULT CODE 80 DHW DEMAND ENDS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

FAULT CODE 60 NO PUMP

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

FAULT CODE 60 NO PUMP

SWITCH SELECTOR

Next: End

FAULT CODE 60

PCB

Next: End

DHW LOW PRESSURE GAS

GAS VALVE COMPENSATION TUBE

Next: End

CH IGNITION

GAS VALVE COMPENSATION TUBE

Next: End

OVERHEAT INVESTIGATION

THERMOSTAT - OVERHEAT FLUE

Next: End

EARTH LEAKAGE 6

CABLE - GAS VALVE / IGNITER

Next: End

BURNER PRESSURE EXC

GAS VALVE COMPENSATION TUBE

Next: End

SPARK NO GAS

GAS VALVE COMPENSATION TUBE

Next: End

FAN RUNS THEN STOPS

THERMOSTAT - OVERHEAT FLUE

Next: End

FAULT CODE 30AND40

THERMOSTAT - OVERHEAT FLUE

Next: End

AUTO FROST

SENSOR - TEMPERATURE

Next: End

DHW MODULATION

SENSOR - TEMPERATURE

Next: End

CH MODULATION

SENSOR - TEMPERATURE

Next: End

DHW BURNER ESTABLISHED

ELECTRODE - IGNITION - FRONT

Next: End

FLAME SENSE POSITION

FLAME SENSE POSITION

Next: End

LOCKING OUT

TRAP - CONDENSATE

Next: End

BURNER IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

BAFFLES OUT

TRAP - CONDENSATE

Next: End

BAFFLES OUT

HEAT EXCHANGER - PRIMARY - FLUE WAYS

Next: End

DHW OPERATION

PIPE ASSEMBLY - BYPASS

Next: End

DHW BURNER IGNITION

GAS INLET PRESSURE

Next: End

BURNER IGNITION PRESSURE LOW OR DIES OUT

GAS INLET PRESSURE

Next: End

DHW BURNER ESTABLISHED

SENSOR - TEMPERATURE

Next: End

FIREING WITH NO DEMAND

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW BURNER ESTABLISHED

LEAD - SENSING ELECTRODE

Next: End

CHOICE OF DIAGNOSTICS

Z DUMMY

Next: End

SPARK GAS PRESENT NO IGNITION

SPARK GAP

Next: End

FOR FAULT CODES

Z DUMMY

Next: End

FAULT CODE 80

CABLE - LOW VOLTAGE

Next: End

MECHANICAL FAILURE

GAS VALVE

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

GAS VALVE

Next: End

DHW FAN RUNS

FAN

Next: End

FAN DOES NOT RUN60 DEGREE LIGHT

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

DHW FAN RUNS60 DEGREE LIGHT

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

FAN DOES NOT RUN60 DEGREE LIGHT

HYDRAULIC OUTLET ASSEMBLY

Next: End

POOR HW

PCB

Next: End

HEAT EXCHANGER PRIMARY

HEAT EXCHANGER - PRIMARY

Next: End

NO HEATING DHW DIAG

EXT CONTROLS/ROOM THERMOSTAT

Next: End

NO HEATING

PCB

Next: End

NO HEATING 2

PCB

Next: End

MAINS LED NOT ILLUMINATED

PCB

Next: End

SELECTOR SWITCH

SWITCH SELECTOR

Next: End

DHW PUMP RUNS

CABLE - PCB INPUT

Next: End

DHW PUMP RUNS

VALVE - DHW FLOW (SPINDLE)

Next: End

DHW DEMAND ENDS

VALVE - DHW FLOW (SPINDLE)

Next: End

DHW DEMAND ENDS

SERVICE KIT - DIAPHRAGM DHW

Next: End

SERVICE KIT

SERVICE KIT - DIAPHRAGM DHW

Next: End

DHW DEMAND LIGHT STUCK ON

PCB

Next: End

DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

MICROSWITCH ASSEMBLY - FLOW VALVE

Next: End

DHW PUMP RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

SENSOR CH

CABLE - LOW VOLTAGE

Next: End

DHW FAN RUNS

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

DHW FAN RUNS

SWITCH - PRESSURE

Next: End

SPARK GENERATOR NO SPARK

CABLE - GAS VALVE / IGNITER

Next: End

DHW BURNER IGNITION

ELECTRODE - IGNITION

Next: End

DHW BURNER IGNITION

FAN

Next: End

DHW BURNER IGNITION

VENTURI

Next: End

NO SPARK

SECONDARY HEAT EXCHANGER

Next: End

NO SPARKING

WASHER 58 DIA - FRONT BEND

Next: End

NO SPARKING

FLUE CLAMP

Next: End

MECHANICAL 2

GAS VALVE

Next: End

FAULT 1

CABLE - GAS VALVE / IGNITER

Next: End

BAFFLES OUT

SECONDARY HEAT EXCHANGER

Next: End

FAULT CODE 30 + 40

PCB

Next: End

FAULT CODE 50 APS N/O WIRES

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

FAULT CODE 50 NOT PROVING IN N/C

SWITCH - PRESSURE

Next: End

FAULT CODE 50 DOES NOT RUN

FAN

Next: End

FAULT CODE 60

FAN

Next: End

FAULT CODE 50 FAN RUNS

VENTURI

Next: End

FAULT CODE 50

SECONDARY HEAT EXCHANGER

Next: End

FAULT CODE 50

WASHER 58 DIA - FRONT BEND

Next: End

FAULT CODE 50

FLUE CLAMP

Next: End

FAULT CODE 50 NO SPARK

PCB

Next: End

NO IGNITION NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

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

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

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

SWITCH - PRESSURE

Next: End

FAULT CODE 30 + 50

PCB

Next: End

NO POWER TO FAN

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

DHW MODULATION

PCB

Next: End

DHW FAN RUNS - CH SENSOR

CABLE - LOW VOLTAGE

Next: End

FAN DOES NOT RUN

SERVICE KIT - DIAPHRAGM - COMBI - PRIMARY

Next: End

DHW FAN RUNS

HYDRAULIC OUTLET ASSEMBLY (CH SPINDLE)

Next: End

FAN DOES NOT RUN

HYDRAULIC OUTLET ASSEMBLY

Next: End

DHW FAN RUNS

PCB

Next: End

NO POWER TO FAN 2

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

DHW BURNER IGNITION DROPPING OUT

FAN

Next: End

DHW BURNER IGNITION DROPPING OUT

VENTURI

Next: End

NO SPARK DROPPING OUT

SECONDARY HEAT EXCHANGER

Next: End

NO SPARKING DROPPING OUT

WASHER 58 DIA - FRONT BEND

Next: End

NO SPARKING DROPPING OUT

FLUE CLAMP

Next: End

FAN DOES NOT RUN

HEAT EXCHANGER - PRIMARY

Next: End

FAN DOES NOT RUN60 DEGREE LIGHT

HEAT EXCHANGER - PRIMARY

Next: End

DHW FLOW RATE

HEAT EXCHANGER 16 PLATES - DHW

Next: End

DHW TEMPERATURE LOW RADIATORS COLD

HEAT EXCHANGER 16 PLATES - DHW

Next: End

CHBOILER5 TO TEMP RADS COLD

VALVE - DHW FLOW (SPINDLE)

Next: End

DHW

HYDRAULIC OUTLET ASSEMBLY

Next: End

FAULT CODE 70

SENSOR - TEMPERATURE

Next: End

DHW PUMP RUNS

SENSOR - TEMPERATURE

Next: End

DHW FAN RUNS

SENSOR - TEMPERATURE

Next: End

RESTRICTED OR BLOCKED

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION

PCB

Next: End

RESTRICTED OR BLOCKED

HEAT EXCHANGER 16 PLATES - DHW

Next: End

RESTRICTED WATERWAYS

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION

OVERHEAT

Next: End

MISCENAEOUS FAULT

PCB

Next: End

EARTH LEAKAGE

GAS VALVE

Next: End

MISCENAEOUS FAULT 2

PCB

Next: End

EARTH LEAKAGE 2

GAS VALVE

Next: End

MISCENAEOUS FAULT 3

PCB

Next: End

EARTH LEAKAGE 3

GAS VALVE

Next: End

MISCENAEOUS FAULT 4

PCB

Next: End

EARTH LEAKAGE 4

GAS VALVE

Next: End

MISCENAEOUS FAULT 5

PCB

Next: End

EARTH LEAKAGE 5

GAS VALVE

Next: End

BLOWING FUSE

CABLE - SELECTOR SWITCH/PUMP

Next: End

BLOWING FUSE

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

BLOWING FUSE

PCB FUSE INVESTIGATION

Next: End

BLANK FOR FUSE INVESTIGATION

Z DUMMY

Next: End

DHW PUMP RUNS

Next: End

BLANK FOR FUSE INVESTIGATION 2

Z DUMMY

Next: End

CH IGNITION

EXT CONTROLS/ROOM THERMOSTAT

Next: End

CH IGNITION

PCB

Next: End

NO IGNITION CLOCK OK

PCB

Next: End

NOT RAMPING UP FOR CH

PCB

Next: End

RE-IGNITION DELAY

PCB

Next: End

NOT RE FIRING

PCB

Next: End

FAULT CODE 80

PCB

Next: End

OVERHEATING80 DEG OVERHEAT

HEAT EXCHANGER 16 PLATES - DHW

Next: End

FAULT CODE 80 NO FAULT OVERHEAT

SENSOR - TEMPERATURE

Next: End

FAULT CODE 80

HEAT EXCHANGER - PRIMARY

Next: End

FAULT CODE 70

PCB

Next: End

FAULT CODE 70

Z BLANK FOR FUSE INVESTIGATION

Next: End

FAULT CODE 30 + 40DHW DEMAND ENDS

VALVE - DHW FLOW (SPINDLE)

Next: End

FAULT CODE 30 + 40DHW DEMAND ENDS

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 30 + 40SERVICE KIT

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 30 + 40 - DHW STUCK ON

PCB

Next: End

FAULT CODE 30 + 40NO DHW DEMAND

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 30 + 40DHW PUMP RUNS

VALVE - DHW FLOW (SPINDLE)

Next: End

FAULT CODE 30 + 40MAINS LED FLASHING 2 3

PCB

Next: End

FAULT CODE 30 + 40EARTH LEAKAGE 2 3

GAS VALVE

Next: End

FAULT CODE 80 DHW DEMAND ENDS

VALVE - DHW FLOW (SPINDLE)

Next: End

FAULT CODE 80 DHW DEMAND ENDS

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 80 SERVICE KIT

SERVICE KIT - DIAPHRAGM DHW

Next: End

FAULT CODE 80 - DHW STUCK ON

PCB

Next: End

FAULT CODE 80 NO DHW DEMAND

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 80 DHW PUMP RUNS

VALVE - DHW FLOW (SPINDLE)

Next: End

FAULT CODE 80 MAINS LED FLASHING 2 3

PCB

Next: End

FAULT CODE 80 EARTH LEAKAGE 2 3

GAS VALVE

Next: End

FAULT CODE 30 + 40 DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 80 DHW DEMAND ENDS

CABLE - LOW VOLTAGE

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

FAULT CODE 60DHW PUMP RUNS

PCB

Next: End

FAULT CODE 60

Z BLANK FOR FUSE INVESTIGATION

Next: End

TRIPPING EARLY

THERMOSTAT - LIMIT

Next: End

EARTH LEAKAGE 6

GAS VALVE

Next: End

FAN RUNS 10 SECONDS THEN STOPS

PCB

Next: End

MINIMUM SET WRONG ON MODUREG

GAS VALVE

Next: End

OVERHEAT THERMOSTAT

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

FAULT CODE 30AND40

CABLE - FAN / PRESSURE SWITCH OVERHEAT EXHAUST

Next: End

FAN STOPS

FLUE THERMOSTAT (RESET)

Next: End

FAULT CODE 30AND40

FLUE THERMOSTAT (RESET)

Next: End

AUTO FROST

PCB

Next: End

CH MODULATION

PCB

Next: End

CH NOISY DHW OK

Next: End

DHW BURNER ESTABLISHED

PCB

Next: End

DHW OPERATION

HEAT EXCHANGER 16 PLATES - DHW

Next: End

DHW BURNER IGNITION

MANIFOLD - BURNER

Next: End

FAULT CODE 60

PUMP

Next: End

Fan does not run

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p1110

Fan runs then stops

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p1112

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1170

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1172

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1174

MAINS LED FLASHING

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p1771

MAINS LED NOT ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p1283

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1296

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1298

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1315

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1317

PUMP PULSES ON AND OFF

CHARACTERISTIC TEST FROM PUMP RUNNING ON DEMAND

Next: p1788

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM PUMP RUNNING ON DEMAND

Next: p1326

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p698

VENTURI DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1378

CONDENSING HEAT EXCHANGER BLOCKED OR RESTRICTED

Next: !p1380

HEAT EXCHANGER SEAL ON ELBOW DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1382

FLUE CLAMP OR SEAL DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1384

DHW temperature low, radiators cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p1181

DHW temperature low, radiators hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: !p1738

VENTURI DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1454

CONDENSING HEAT EXCHANGER BLOCKED OR RESTRICTED

Next: !p1456

HEAT EXCHANGER SEAL ON ELBOW DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1458

FLUE CLAMP OR SEAL DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1460

BURNER IGNITES BUT BURNER PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p2075

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1597

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1599

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1601

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

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p1627

BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1503

BOILER UP TO TEMPERATURE RADIATORS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p1402

VENTURI DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1669

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

CONDENSING HEAT EXCHANGER BLOCKED OR RESTRICTED

Next: !p1671

HEAT EXCHANGER SEAL ON ELBOW DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1673

FLUE CLAMP OR SEAL DAMAGED

CHARACTERISTIC TEST FROM INSPECTION FLUE COMPONENTS

Next: !p1675

BOILER CONTINUES TO HEAT PAST 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1757

BOILER OVERHEATS BELOW 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: p2065

HOT WATER LIGHT FLASHES WITH DEMAND

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1783

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH IGNITION

Next: p1841

BURNER IGNITES BUT DOES NOT BEHAVE AS DESCRIBED

CHARACTERISTIC TEST FROM CH IGNITION

Next: p2032

NO RE IGNITION DELAY

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1862

APPLIANCE / SYSTEM COOL AND DOES NOT RE IGNITE

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1864

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1946

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1951

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1953

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1959

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1975

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1980

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1982

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1988

Fires with no demand

CHARACTERISTIC TEST FROM CH OPERATION

Next: p839

NO SPARK PRESENT

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p1356

Sparking present OK, ZERO OR LOW GAS PRESSURE PRESENT

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p751

SPARK AND GAS PRESSURE PRESENT BUT NO IGNITION

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p66

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM CH OPERATION (FOR HEAT EX DIAG)

Next: p1192

BOILER KETTLES

CHARACTERISTIC TEST FROM CH OPERATION (FOR HEAT EX DIAG)

Next: p703

Burner ignition pressure low or dies out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p761

Burner ignites but baffles out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p110

Burner ignitES, sparkING continues, boiler goes to lockout

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED (HIGH FLAME)

Next: p669

06/06/2018 11:45:02 1805_1_50_1 20/07/2018 13:57:41

06/07/2018 11:08:15

Next: End

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1902, f1010

RESISTANCE HARNESS DHW

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

Next: !p1740, !f1739

HEATING THERMISTOR AND HARNESS RESISTANCE

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1865, f1014

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p1016, !f1015

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1076, !f1077

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: p1115, !f1116

CHECK FOR TRAPPED AIR AND SYSTEM WATER PRESSURE

Next: p1525, !f1164

TIMER LINK IN VOLTS INPUT

{GAINPCBACS}
SELE

Next: p1200, !f1201

VOLTAGE TO EXTERNAL CONTROLS (FROM BOILER)

{GAINPCBACS}
SELE

Next: !p1209, !f1210

MAINS POWER SUPPLY

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: p1286, f1832

FUSE (2 AMP) RESISTANCE

REMOVE FUSE FROM FUSE HOLDER LOCATED IN THE MAIN TERMINAL BLOCK

Next: !p1290, f1829

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1301, !f1302

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p1313, ?1314, ?1316

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p1320, !f1321

PRIMARY FLOW SWITCH OC

REMOVE THE RED LEADS FROM THE PUMP PROVING MICROSWITCH AND MAKE SAFE

Next: p1329, f1330

CH SPINDLE RETRACTED

Next: !p1331, f1332

INSPECT PUMP PROVING DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: !p1333, !f1334

RESISTANCE HARNESS DHW

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

Next: !p1741, !f1742

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p1341, !f1342

RESISTANCE APS AT APS

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p1350, f1351

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1352, !f1353

RESISTANCE HARNESS APS (N/O)

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

Next: p1361, !f1362

VOLTAGE SUPPLY TO SPARK GENERATOR

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAXIMUM

Next: p1365, !f1366

VOLTAGE GAS VALVE AT PCB

{GAINPCBACS}
DHW TEMPERATURE SELECTOR TO MAXIMUM

Next: !p1388, f1498

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL
DHW TEMPERATURE SELECTOR TO MAX

Next: p1469, f1415

OVERHEAT AND FLUE THERMOSTAT HARNESS RESISTANCE

REMOVE CONNECTOR A2 FROM THE PCB

Next: !p1416, f1417

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: p2048, !f1419

FAN RUNS ON HOT WATER DEMAND

SELECTOR SWITCH TO D

Next: p1677, f1425

AIR PRESSURE SWITCH

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1426, f1427

RESISTANCE APS AT APS

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p1428, f1429

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1430, !f1431

RESISTANCE HARNESS APS (N/O)

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

Next: !p1462, !f1463

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p1499, !f1500

RESISTANCE AIR PRESSURE SWITCH & HARNESS (NC)

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1572, f1563

RESISTANCE APS AT APS (NC)

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

Next: !p1564, f1565

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1566, !f1567

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: !p158, !f350

VOLTAGE FAN AT PCB

{GAINPCBACS}
SELE

Next: !p1576, f1577

HEATING THERMISTOR AND HARNESS RESISTANCE

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1578, f1579

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p1580, !f1581

RESISTANCE HARNESS DHW

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

Next: !p1743, !f1744

CHECK FOR TRAPPED AIR AND SYSTEM WATER PRESSURE

Next: p1588, !f1589

VOLTAGE FAN AT PCB 50 DEGREE LIGHT

{GAINPCBACS}
SELE

Next: !p1609, !f1610

WATER SUPPLY TO PREMISES

TURN ON A COLD WATER TAP

Next: p1723, !f1722

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1731, f1745

INSPECT 3-WAY VALVE OPERATION

DISCHARGE AND DRAIN THE HOT WATER CIRCUIT

Next: !p1734, !f1735

INSPECTION RECUPERATOR HEAT EXCHANGER WATERWAYS

PRIMARY WATER CIRCUIT DRAINED AND DISCHARGED
REMOVE THE FLOW AND RETURN PIPES TO THE RECUPERATOR

Next: !p1746, !f1747

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1766, f1767

INSPECTION RECUPERATOR HEAT EXCHANGER WATERWAYS

PRIMARY WATER CIRCUIT DRAINED AND DISCHARGED
REMOVE THE FLOW AND RETURN PIPES TO THE RECUPERATOR

Next: !p1768, !f1769

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1774, !f1775

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1779, !f1780

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1786, !f1787

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1791, !f1792

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1796, !f1797

RESISTANCE PUMP AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A4 FROM THE PCB

Next: p1800, f1801

RESISTANCE PUMP FUSE INVESTIGATION

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

Next: !p1802, !f1803

RESISTANCE FAN FUSE INVESTIGATION

DISCONNECT LIVE AND NEUTRAL LEADS FROM FAN

Next: !p1806, !f1807

FUSE FURTHER INVESTIGATION (APPLIANCE)

Next: !p1830, !f1831

RESISTANCE FUSE MAINS

GAIN ACCESS TO THE MAINS FUSE FOR THE APPLIANCE

Next: !p1833, f1834

FUSE FURTHER INVESTIGATION (MAINS)

Next: !p1835, !f1836

VOLTAGE TO EXTERNAL CONTROLS (FROM BOILER)

{GAINPCBACS}
SELE

Next: !p1844, !f1845

TIMER LINK IN VOLTS INPUT

{GAINPCBACS}
SELE

Next: p1848, !f1849

TEST SELECTOR SWITCH (LOCKOUT / RESET POSITION)

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH

Next: !p1868, !f1869

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1893, f1899

INSPECTION RECUPERATOR HEAT EXCHANGER WATERWAYS

PRIMARY WATER CIRCUIT DRAINED AND DISCHARGED
REMOVE THE FLOW AND RETURN PIPES TO THE RECUPERATOR

Next: !p1900, !f1901

TEST SELECTOR SWITCH (LOCKOUT / RESET POSITION)

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH

Next: !p1905, !f1906

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p1949, ?1950, ?1952

DHW DEMAND

Next: !p1962, f1963

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1964, !f1965

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1972, !f1973

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATED DHW COLD FE

Next: !p1978, ?1979, ?1981

DHW DEMAND

Next: !p1991, f1992

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1993, !f1994

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p2001, !f2002

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p2004, !f2005

RESISTANCE DHW MICROSWITCH

DISCONNECT LEADS FROM DHW MICROSWITCH ASSEMBLY

Next: !p2007, !f2008

PRIMARY FLOW SWITCH OC

REMOVE THE RED LEADS FROM THE PUMP PROVING MICROSWITCH AND MAKE SAFE

Next: p2010, f2011

CH SPINDLE RETRACTED

Next: !p2012, f2013

INSPECT PUMP PROVING DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: !p2014, !f2015

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p2072, !f2073

RESET FLUE THERMOSTAT

Next: !p2100, !f2092

RESET FLUE THERMOSTAT

Next: !p2101, !f2099

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p342, !f351

PUMP RUNNING ON DEMAND (60 DEGREE)

SELECTOR SWITCH TO D

Next: p1160, f942

PUMP VOLTS

{GAINPCBACS}
SELE

Next: !p943, f2009

GAS RATE

Next: p164, f1075

MODULATING SOLENOID VOLTAGE

SELECTOR SWITCH TO D

Next: !p1088, !f1091

GAS INLET PRESSURE

SLACKEN THE LOWER TE

Next: p683, !f693

INSPECTION FLUE

Next: !p1391, !f1390

AIR PRESSURE SWITCH

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1119, f1349

OVERHEAT AND FLUE THERMOSTAT HARNESS RESISTANCE

REMOVE CONNECTOR A2 FROM THE PCB

Next: p2069, f1114

FLUE THERMOSTAT RESISTANCE

REMOVE ONE CONNECTOR FROM FLUE THERMOSTAT

Next: !p2087, f2090

FAN VOLTS

SELECTOR SWITCH TO O

Next: !p1125, f1575

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1464, !f1159

PUMP PROVING SWITCH SPINDLE

ENSURE THERE IS NO DEMAND FOR EITHER CH OR DHW

Next: p1161, f1162

CH DEMAND MICROSWITCH OPERATION

REMOVE THE RED LEADS

Next: p2018, !f1176

PUMP LIMPET

Next: p1165, !f1166

INSPECTION CH DIFFERENTIAL VALVE

APPLIANCE DRAINED AND DISCHARGED

Next: p1538, ?1169, ?1171, ?1173

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p1183, f1730

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1185, !f1184

INSPECTION PCB CONTROL KNOBS

{GAINPCBACS}

Next: p1187, !f1186

INSPECTION BURNER MANIFOLD

REMOVE THE BURNER ASSEMBLY

Next: !p1189, !f1188

VOLTAGE FROM EXTERNAL CONTROLS (TO BOILER)

{GAINPCBACS}
SELE

Next: p1197, f1208

CLOCK FITTED

Next: p1198, f1199

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1204, !f1205

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1230, !f1203

CLOCK SWITCH RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1229, !f1207

POWER TO CONTROL BOARD

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: !p1284, f1285

SELECTOR SWITCH SUPPLY VOLTAGE

SELECTOR SWITCH TO OFF POSITION

Next: !p1288, f1289

OPERATION DIFFERENTIAL VALVE DHW

{GAINPCBACS}

Next: p1311, f1312

DHW DEMAND

Next: p1299, f1300

HOT WATER MICROSWITCH OPERATION

REMOVE THE HOT WATER MICRO SWITCH FROM THE BOILER

Next: p1776, !f1308

INSPECT HOT WATER FLOW SENSING PIPES

HOT WATER CIRCUIT DRAINED AND DISCHARGED

Next: p1303, !f1304

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1305, !f1306

RESISTANCE DHW MICROSWITCH AND HARNESS

DISCONNECT CONNECTOR A5 FROM THE PCB

Next: !p1318, f1319

PUMP VOLTS

{GAINPCBACS}
SELE

Next: !p1327, f1328

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1335, f1336

HEATING THERMISTOR AND HARNESS RESISTANCE

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1339, f1340

TEST SELECTOR SWITCH (LOCKOUT / RESET POSITION)

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH

Next: p1793, !f1344

VENTURI

REMOVE THE FAN ASSEMBLY FROM THE BOILER

Next: !p1354, !f1355

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1357, !f1358

OBSERVATION SPARKING WITH APS PROVEN

DISCONNECT THE RIGHT HAND TUBE(+VE) FROM THE VENTURI AND CONNECT THE AIR PRESSURE SWITCH CHARGE KIT.

Next: p1359, f1360

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1611, !f1372

SPARK GENERATOR (OUTPUT)

REMOVE THE LEAD FROM

Next: p1363, f1364

SPARK ELECTRODE GAP

REMOVE THE INNER COMBUSTION COVER TO GAIN ACCESS TO THE BURNER

Next: !p1369, !f1370

RESISTANCE ELECTRODE LEAD

Next: !p1367, !f1368

INSPECTION FLUE

Next: p1373, !f1374

INSPECTION FLUE SEAL AND COMPONENTS

REMOVE THE TWO FLUE CLAMPS AND THE CONDENSING HEAT EXCHANGER ELBOW

Next: !p1375, ?1377, ?1379, ?1381, ?1383

VOLTAGE GAS VALVE AT GAS VALVE

{GAINPCBACS}
SELE

Next: !p1386, f1387

INSPECTION DHW SPINDLE

Next: p1518, f1733

PUMP LIMPET TEST

Next: p1522, !f1406

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1436, !f1437

FAN VOLTS 50 DEGREE LIGHT

SELECTOR SWITCH TO O

Next: !p1434, f1608

VENTURI

REMOVE THE FAN ASSEMBLY FROM THE BOILER

Next: !p1432, !f1433

OBSERVATION SPARKING WITH APS PROVEN

DISCONNECT THE RIGHT HAND TUBE(+VE) FROM THE VENTURI AND CONNECT THE AIR PRESSURE SWITCH CHARGE KIT.

Next: p1446, f1461

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1700, !f1448

INSPECTION FLUE

Next: p1449, !f1450

INSPECTION FLUE SEAL AND COMPONENTS

REMOVE THE TWO FLUE CLAMPS AND THE CONDENSING HEAT EXCHANGER ELBOW

Next: !p1451, ?1453, ?1455, ?1457, ?1459

RESISTANCE MODULATING SOLENOID

REMOVE THE BLACK LEADS FROM THE MODULATING SOLENOID

Next: p765, !f1468

INSPECTION PRESSURE SYSTEM

Next: p1541, !f1471

PUMP LIMPET

Next: p1472, !f1473

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1474, !f1475

HEATING THERMISTOR AND HARNESS RESISTANCE

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1749, !f1477

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1049, !f1513

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1515, !f1516

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1403, !f1521

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1523, !f1524

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1163, !f1537

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1718, !f1540

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1909, !f1553

VENTURI

REMOVE THE FAN ASSEMBLY FROM THE BOILER

Next: !p1568, !f1569

RESISTANCE FAN

DISCONNECT LIVE AND NEUTRAL LEADS FROM THE FAN

Next: !p1573, !f1574

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1582, f1583

PUMP PROVING SWITCH SPINDLE

ENSURE THERE IS NO DEMAND FOR EITHER CH OR DHW

Next: p1586, f1587

CH DEMAND MICROSWITCH OPERATION

REMOVE THE RED LEADS

Next: p1604, !f1605

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1590, !f1591

PUMP LIMPET

Next: p1592, !f1593

INSPECTION CH DIFFERENTIAL VALVE

APPLIANCE DRAINED AND DISCHARGED

Next: p1594, ?1596, ?1598, ?1600

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1715, !f1603

TEST SELECTOR SWITCH (LOCKOUT / RESET POSITION)

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH

Next: !p1606, !f1607

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1371, !f1625

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}

Next: p1628, !f1676

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1659, !f1630

PUMP LIMPET TEST

Next: p1514, !f170

INSPECT AIR PRESSURE SWITCH TUBES

REMOVE THE AIR PRESSURE SENSING TUBE FROM THE BOILER

Next: p1660, !f1661

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1662, !f1663

INSPECTION FLUE

Next: p1664, !f1665

INSPECTION FLUE SEAL AND COMPONENTS

REMOVE THE TWO FLUE CLAMPS AND THE CONDENSING HEAT EXCHANGER ELBOW

Next: !p1666, ?1668, ?1670, ?1672, ?1674

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}

Next: p1424, !f1699

PUMP LIMPET TEST

Next: p187, !f188

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1447, !f1714

INSPECT INTEGRAL BYPASS

BOILER DRAINED AND DISCHARGED

Next: !p1716, !f1717

INSPECT INTEGRAL BYPASS

BOILER DRAINED AND DISCHARGED

Next: !p1719, !f1720

COLD WATER INLET VALVE

Next: p1724, !f1725

DHW INLET FILTER

DHW CIRCUIT OF APPLIANCE DRAINED AND DISCHARGED

Next: p1726, !f1727

COLD WATER INLET FILTER / FLOW RESTRICTOR

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1728, !f1729

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p1750, f1765

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1752, !f1751

OBSERVATION RUN BOILER UP TO TEMPERATURE

CH TEMPERATURE SELEC

Next: p1762, ?1756, ?1758

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1770, !f1763

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1772, f1773

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1777, f1778

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1784, f1785

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1789, f1790

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1794, f1795

RESISTANCE FAN AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1820, f1805

RESISTANCE GAS VALVE FUSE INVESTIGATION

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: p1821, !f1822

DIODE TEST GAS VALVE HARNESS FUSE INVESTIGATION

REMOVE THE CONNECTOR

Next: p1823, !f1824

RESISTANCE GAS VALVE HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A1 FROM THE PCB

Next: !p1825, !f1826

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1856, !f1857

VOLTAGE FROM EXTERNAL CONTROLS (TO BOILER)

{GAINPCBACS}
SELE

Next: p1842, f1843

CLOCK FITTED

Next: p1846, f1847

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1852, !f1853

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1850, !f1851

CLOCK SWITCH RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1854, !f1855

INSPECTION PCB CONTROL KNOBS

{GAINPCBACS}

Next: !p1858, !f1859

OBSERVATION BOILER RESET (CH SENSOR)

DHW TEMPERATURE SELECTOR TO MAX

Next: p1866, f1867

INSPECTION PRESSURE SYSTEM

Next: p1870, !f1871

INSPECT INTEGRAL BYPASS

BOILER DRAINED AND DISCHARGED

Next: !p414, !f190

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1872, !f1873

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1874, ?1974, ?1987

PUMP LIMPET

Next: p1887, !f1888

RESISTANCE DHW SENSOR AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1889, !f1890

TEMPERATURE DIFFERENTIAL DHW

ATTACH TEMPERATURE P

Next: p1891, f1892

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1895, !f1896

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1897, !f1898

OBSERVATION BOILER RESET (DHW SENSOR)

Next: p1903, f1904

OBSERVATION RUN BOILER ON DHW

DHW TEMPERATURE SELECTOR TO MAX

Next: !p1907, !f1908

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1470, ?1945, ?1958

OPERATION DIFFERENTIAL VALVE DHW

{GAINPCBACS}

Next: p1947, f1948

RESISTANCE DHW MICROSWITCH AND HARNESS

DISCONNECT CONNECTOR A5 FROM THE PCB

Next: !p1956, f2003

HOT WATER MICROSWITCH OPERATION

REMOVE THE HOT WATER MICRO SWITCH FROM THE BOILER

Next: p1960, f1961

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1970, f1971

INSPECT HOT WATER FLOW SENSING PIPES

HOT WATER CIRCUIT DRAINED AND DISCHARGED

Next: p1966, !f1967

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1968, !f1969

OPERATION DIFFERENTIAL VALVE DHW

{GAINPCBACS}

Next: p1976, f1977

RESISTANCE DHW MICROSWITCH AND HARNESS

DISCONNECT CONNECTOR A5 FROM THE PCB

Next: !p1985, f2006

HOT WATER MICROSWITCH OPERATION

REMOVE THE HOT WATER MICRO SWITCH FROM THE BOILER

Next: p1989, f1990

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1999, f2000

INSPECT HOT WATER FLOW SENSING PIPES

HOT WATER CIRCUIT DRAINED AND DISCHARGED

Next: p1995, !f1996

WATER INLET VENTURI

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1997, !f1998

TEST SELECTOR SWITCH (LOCKOUT / RESET POSITION)

REMOVE RED AND BLUE LEADS FROM THE SELECTOR SWITCH

Next: !p2016, !f2017

OBSERVATION BOILER OPERATION (60 DEGREE)

DHW TEMPERATURE SELECTOR TO MAX

Next: !p2019, !f2020

INSPECTION COMPENSATION PIPE

Next: p764, !f2031

INSPECTION COMPENSATION PIPE

Next: p1840, !f2038

FLUE THERMOSTAT RESISTANCE

REMOVE ONE CONNECTOR FROM FLUE THERMOSTAT

Next: !p2097, f2096

FLUE THERMOSTAT RESISTANCE - OPERATION

REMOVE ONE CONNECTOR FROM FLUE THERMOSTAT

Next: !p2066, !f2067

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p2074, f2071

INSPECTION COMPENSATION PIPE

Next: !p2076, !f2077

INSPECTION COMPENSATION PIPE

Next: p1385, !f2086

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p339, !f340

SPARK ELECTRODE GAP

REMOVE THE INNER COMBUSTION COVER TO GAIN ACCESS TO THE BURNER

Next: !p92, !f93

FLAME SENSE ELECTRODE

Next: p661, !f662

FLAME SENSE POSITION

REMOVE THE INNER COMBUSTION COVER TO GAIN ACCESS TO THE BURNER

Next: p663, !f664

FLAME SENSE LEAD

Next: !p681, !f911

OBSERVATION RECTIFICATION TRAP DISCONNECTED

REMOVE THE WHITE WIRE FROM THE CONDENSATE TRAP ASSEMBLY AND MAKE SAFE

Next: p660, !f677

CONDENSATE TRAP CLEAR

REMOVE THE CONDENSATE TRAP

Next: p687, !f694

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p111, !f695

CENTRAL HEATING OPERATION CHECK

FLOW AND RETURN VALVES FULLY OPEN
CH THERMOSTAT SET TO MAX

Next: !p736, ?700, ?702

INSPECT INTEGRAL BYPASS

BOILER DRAINED AND DISCHARGED

Next: !p1190, !f718

GAS INLET PRESSURE

SLACKEN THE LOWER TE

Next: p2078, !f752

GAS INLET PRESSURE

SLACKEN THE LOWER TE

Next: p2021, !f763

HEATING THERMISTOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1153, !f766

MODULATING SOLENOID VOLTAGE

SELECTOR SWITCH TO D

Next: !p1083, !f1086

HOT WATER MICROSWITCH OPERATION

REMOVE THE HOT WATER MICRO SWITCH FROM THE BOILER

Next: p338, !f843

System Information

  • Total Tests: 643
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control