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 INSTANT 80E

GLOBALLY REPLACED

Next: &1, *

APPLIANCE APPEARS SATISFACTORY.

Next: nff

BAXI COMBI INSTANT 80E


REMOVAL OF THE F

Next: &1023, !f17

DHW FLOW RATE

Next: &1278, f1508

DHW FAN RUNS

SELECTOR SWITCH TO D

Next: &6, ?35, ?37

DHW BURNER IGNITION

ATTACH PRESSURE GAUG

Next: &7, ?61, ?63, ?65, ?1475

DHW BURNER ESTABLISHED

ATTACH PRESSURE GAUG

Next: &9, ?94, ?96, ?98, ?1520

DHW OPERATION

SELECTOR SWITCH TO D

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

DHW MODULATION

SET FLOW RATE AT TAP

Next: &475, 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 PRESSURE GAUG

Next: &15, f341

RE-IGNITION DELAY

SELECTOR SWITCH TO D

Next: &16, ?1662, ?1664

PUMP OVERRUNS

SELECTOR SWITCH TO D

Next: &nff, !f196

DHW PREHEAT

SELECTOR SWITCH TO D

Next: &883, f1477

CH IGNITION

ATTACH PRESSURE GAUG

Next: &12, ?1553, ?1555

FAULT CODES

Next: &nff, !f968

50 DEGREE LIGHT

BLANK PAGE

Next: &nff, f1215

60 DEGREE LIGHT

BLANK PAGE

Next: &nff, f988

70 DEGREE LIGHT

BLANK PAGE

Next: &nff, f1012

80 DEGREE LIGHT

BLANK PAGE

Next: &nff, f1018

CHOICE OF DIAGNOSTICS

Next: &3, !f1024

30 + 50 DEGREE LIGHTS

BLANK PAGE

Next: &nff, f1393

30 + 40 DEGREE LIGHTS

BLANK PAGE

Next: &nff, f1241

OBSERVATION MAINS LED ILLUMINATED

SELECTOR SWITCH IN CH AND DHW POSITION

Next: &1293, ?1279, ?1281

DHW DEMAND LIGHT

TURN HOT WATER TAP O

Next: &1319, ?1294, ?1296, ?1616

DHW PUMP RUNS

SELECTOR SWITCH TO D

Next: &5, ?1320, ?1322

HEADER FOR FUSE INVESTIGATION

NOT USED

Next: &nff, f1629

SETTING THE MULTIMETER TO DIODE TEST

THE IMAGES BELOW SHO

Next: &nff, !f1660

DHW BURNER ESTABLISHED

ELECTRODE - IGNITION - FRONT

Next: End

FAULT CODE 80

SENSOR- TEMPERATURE

Next: End

CHOICE OF DIAGNOSTICS

Z DUMMY

Next: End

DHW BURNER ESTABLISHED

LEAD- SENSING ELECTRODE

Next: End

DHW BURNER IGNITION

SWITCH - AIR PRESSURE

Next: End

DHW BURNER IGNITION

PIPE - PRESSURE SWITCH

Next: End

DHW BURNER IGNITION

VENTURI - PRESSURE SENSING

Next: End

DHW BURNER IGNITION

FLUE

Next: End

DHW BURNER ESTABLISHED

SENSOR- TEMPERATURE

Next: End

NO SPARK

PCB

Next: End

OVERHEAT THERMOSTAT RESISTANCE

LEAD - IGNITION ELECTRODE

Next: End

NO SPARK

SPARK GAP

Next: End

DHW BURNER IGNITION NO SPARKING APS WIRES

CABLE - FAN / PRESSURE SWITCH

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 30 + 40

THERMOSTAT - LIMIT

Next: End

DHW PUMP RUNS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

DHW PUMP RUNS

PIPE - POSITIVE / NEGATIVE PRESSURE

Next: End

DHW VENTURI

HYDRAULIC VENTURI ASSEMBLY

Next: End

DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

DHW PUMP RUNS

SWITCH - SELECTOR

Next: End

DHW PUMP RUNS

SENSOR- TEMPERATURE

Next: End

DHW PUMP RUNS

DIAPHRAGM - PRESSURE - THERMOSTAT

Next: End

FAULT CODE 60

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 50 APS N/C WIRE

CABLE - FAN / PRESSURE SWITCH

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

DHW BURNER ESTABLISHED MODUREG RESISTANCE

GAS VALVE

Next: End

GAS VALVE BLOWING PCB

PCB AND GAS VALVE

Next: End

FAULT CODE 30 AND 50 DEGREE LIGHT

PIPE - PRESSURE SWITCH

Next: End

FAULT CODE 30 AND 50 DEGREE LIGHT

VENTURI - PRESSURE SENSING

Next: End

FAULT CODE 30 + 50

FAN

Next: End

OVERHEATING

TAP - ISOLATION - FLOW / RETURN

Next: End

PUMP PROVING SWITCH

TAP - ISOLATION - FLOW / RETURN

Next: End

BOILER TO TEMP RADS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

BOILER AND RADS COOL

TAP - ISOLATION - FLOW / RETURN

Next: End

RESTRICTED OR BLOCKED 2

FILTER RETURN

Next: End

RESTRICTED OR BLOCKED 3

FILTER RETURN

Next: End

RESTRICTED OR BLOCKED 4

FILTER RETURN

Next: End

PREHEAT

PCB LINK A10 AND A11

Next: End

PUMP NOT RUNNING PREHEAT

PCB LINK A10 AND A11

Next: End

DHW FAN RUNS

THERMOSTAT - LIMIT

Next: End

FILTER

FILTER - DHW INLET

Next: End

DHW FLOW RATE

DHW FLOW RESTRICTOR/FILTER

Next: End

INSUFFICIENT

WATER SUPPLY

Next: End

DROPPING OUT

SWITCH - AIR PRESSURE

Next: End

INADEQUATE OR DROPPING

PCB

Next: End

DROPPING OUT

PIPE - PRESSURE SWITCH

Next: End

BURNER DROPPING OUT

HEAT EXCHANGER - PRIMARY

Next: End

AIR FLOW DROPPING OUT

FLUE

Next: End

AIR FLOW DROPPING OUT

VENTURI - PRESSURE SENSING

Next: End

LOW OR FLUCTUATING VOLTAGE TO FAN

PCB

Next: End

CH IGNITION

SWITCH - SELECTOR

Next: End

CH IGNITION NO IGNITION TIMER LINK

PCB

Next: End

CH IGNITION

TIMER LINK

Next: End

NO CLOCK IN VOLTS

PCB

Next: End

NO IGNITION

TIMER (CLOCK)

Next: End

NOT RAMPING UP

SENSOR- TEMPERATURE

Next: End

NOT RAMPING UP ON CH

THERMOSTAT CONTROLS

Next: End

DHW SENSOR

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 70

CABLE - LOW VOLTAGE

Next: End

POOR DHW

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION

GAS VALVE

Next: End

RESTRICTED OR BLOCKED 5

FILTER RETURN

Next: End

OVERHEATING

HEAT EXCHANGER - PRIMARY

Next: End

EARTH LEAKAGE 2

CABLE - GAS VALVE/IGNITER

Next: End

EARTH LEAKAGE 3

CABLE - GAS VALVE/IGNITER

Next: End

BLOWING FUSE

GAS VALVE

Next: End

BLOWING FUSE

CABLE - GAS VALVE/IGNITER

Next: End

BLOWING FUSE

MOTOR - 3 - WAY -VALVE

Next: End

BLOWING FUSE

FAN

Next: End

BLOWING FUSE

PUMP

Next: End

BLOWING FUSE 2

CABLE - GAS VALVE/IGNITER

Next: End

BLOWN

FUSE MAINS

Next: End

DHW PUMP RUNS

FUSE 2A 250V

Next: End

BLANK FOR SETTING METER TO DIODE

Z DUMMY

Next: End

NO PREHEAT

THERMOSTAT CONTROLS

Next: End

NO DEMAND

THERMOSTAT CONTROLS

Next: End

WATER LEAK

DIVERTER VALVE BODY AND HEAD

Next: End

FAN NOT RUNNING FAULT CODE

PCB LINK A10 AND A11

Next: End

ELECTRICAL SAFETY CHECKS

ELECTRICAL SAFETY CHECKS

Next: End

BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PUMP

Next: End

NO DEMAND 2

THERMOSTAT CONTROLS

Next: End

CH OPERATION

SENSOR- TEMPERATURE

Next: End

DHW SENSOR 2

CABLE - LOW VOLTAGE

Next: End

DHW FAN RUNS

SENSOR- TEMPERATURE

Next: End

FAN RUNS

SYSTEM PRESSURE

Next: End

PUMP PROVING SWITCH 2

TAP - ISOLATION - FLOW / RETURN

Next: End

CH SPINDLE

PUMP

Next: End

RESTRICTED OR BLOCKED

FILTER RETURN

Next: End

DHW FAN RUNS

CABLE - LOW VOLTAGE

Next: End

LOCK OUT RESET

SWITCH - SELECTOR

Next: End

EARTH LEAKAGE

CABLE - GAS VALVE/IGNITER

Next: End

STUCK IN PRE HEAT

THERMOSTAT CONTROLS

Next: End

EARTH LEAKAGE 2 3

CABLE - GAS VALVE/IGNITER

Next: End

EARTH LEAKAGE 3 3

CABLE - GAS VALVE/IGNITER

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

OVERHEAT INVESTIGATION80 DEG OVERHEAT

PUMP

Next: End

80 DEG OVERHEAT

SENSOR - TEMPERATURE

Next: End

OVERHEATING80 DEG OVERHEAT

HEAT EXCHANGER - PRIMARY

Next: End

OVERHEAT INVESTIGATION80 DEG OVERHEAT

GAS VALVE

Next: End

RESTRICTED OR BLOCKED 580 DEG OVERHEAT

FILTER RETURN

Next: End

FAULT CODE 70

SWITCH - SELECTOR

Next: End

FAULT CODE 70 - FAULTING DURING OPERATION

SENSOR - TEMPERATURE

Next: End

DHW OPERATION DHW COOL RADS HOT

CABLE - 3-WAY VALVE MOTOR

Next: End

CH OPERATION UP TO TEMP RADS COOL

CABLE - 3-WAY VALVE MOTOR

Next: End

FAULT CODE 60

PIPE ASSEMBLY - BYPASS

Next: End

FAULT CODE 60 - FAULT REOCCURS

PCB

Next: End

CH NOISY DHW OK

PUMP

Next: End

FAULT CODE 30 + 40 DHW DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

CH OPERATION CH NOISY DHW OK

PIPE ASSEMBLY - BYPASS

Next: End

FAULT CODE 30 + 40DHW PUMP RUNS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

FAULT CODE 30 + 40DHW PUMP RUNS

PIPE - POSITIVE / NEGATIVE PRESSURE

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 DEMAND ENDS

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 80 DHW PUMP RUNS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

SYSTEM PRESSURE RISE

VESSEL - EXPANSION WITH STORAGE

Next: End

FAULT CODE 80 DHW PUMP RUNS

PIPE - POSITIVE / NEGATIVE PRESSURE

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

PUMP OVERRUNS

PCB

Next: End

FAULT CODE 80

VALVE - 3 WAY ASSEMBLY

Next: End

FAULT CODE 80 DIVERTER

PCB

Next: End

FAULT CODE 80

CABLE - 3-WAY VALVE MOTOR

Next: End

FAULT CODE 30 + 40

VALVE - 3 WAY ASSEMBLY

Next: End

FAULT CODE 30 + 40 FAULT CODE 80 DIVERTER

PCB

Next: End

FAULT CODE 30 + 40 FAULT CODE 80

CABLE - 3-WAY VALVE MOTOR

Next: End

DHW IGNITION

GAS VALVE COMPENSATION TUBE

Next: End

DHW BURNER ESTABLISHED BURNER IGNITION PRESSURE LOW OR DIES OUT

GAS INLET PRESSURE

Next: End

CH IGNITION

GAS VALVE COMPENSATION TUBE

Next: End

EARTH LEAKAGE 5

CABLE - GAS VALVE/IGNITER

Next: End

BURNER PRESSURE EXC

GAS VALVE COMPENSATION TUBE

Next: End

SPARK NO GAS

GAS VALVE COMPENSATION TUBE

Next: End

HIGH FLAME NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

FLAME SENSE POSITION

FLAME SENSE GAP

Next: End

CH OPERATION FIRES WITH NO DEMAND

SENSOR- TEMPERATURE

Next: End

DHW MODULATION

SENSOR - TEMPERATURE

Next: End

CH MODULATION

SENSOR- TEMPERATURE

Next: End

DHW TEMPERATURE LOW RADIATORS HOT

PCB

Next: End

DHW FAN RUNS

PIPE - PRESSURE SWITCH

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PCB

Next: End

CH OPERATION

VALVE - 3 WAY ASSEMBLY

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

PUMP

Next: End

DHW FAN RUNS

VENTURI - PRESSURE SENSING

Next: End

LETTING BY

PRESSURE DIFFERENTIAL ASSEMBLY

Next: End

DHW BURNER ESTABLISHED

HEAT EXCHANGER - PRIMARY

Next: End

DHW BURNER ESTABLISHED BURNER IGNITES BUT BAFFLES OUT

GAS INLET PRESSURE

Next: End

DHW FAN RUNS

FLUE

Next: End

BURNER PRESSURE LOW

SENSOR - TEMPERATURE

Next: End

DHW COLD RADS COLD

THERMOSTAT CONTROLS

Next: End

DHW COLD RADS COLD

SENSOR - TEMPERATURE

Next: End

DHW OPERATION

MANIFOLD - BURNER

Next: End

DHW OPERATION

PIPE ASSEMBLY - BYPASS

Next: End

CH IGNITION2

SWITCH - SELECTOR

Next: End

CH IGNITION NO IGNITION TIMER LINK2

PCB

Next: End

CH IGNITION2

TIMER LINK

Next: End

NO CLOCK IN VOLTS2

PCB

Next: End

NO IGNITION2

TIMER (CLOCK)

Next: End

SPARK GAS PRESENT NO IGNITION

SPARK GAP

Next: End

DHW BURNER IGNITION

GAS INLET PRESSURE

Next: End

FAULT CODES PAGE

Z DUMMY

Next: End

FAULT CODE 60

SYSTEM PRESSURE

Next: End

FAULT CODE 60 LIMPET

PUMP

Next: End

FAULT CODE 60

DIAPHRAGM - PRESSURE - THERMOSTAT

Next: End

FAULT CODE 60

VALVE - 3 WAY ASSEMBLY (CH SPINDLE)

Next: End

FAULT CODE 60

VALVE - 3 WAY ASSEMBLY

Next: End

DHW BURNER IGNITION

FAN

Next: End

DHW FAN RUNS APS WIRES

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 80

CABLE - LOW VOLTAGE

Next: End

DHW BURNER IGNITION

IGNITOR C/W LEAD

Next: End

DHW BURNER IGNITION

ELECTRODE - IGNITION

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

MAINS LED NOT ILLUMINATED

PCB

Next: End

SELECTOR SWITCH

SWITCH - SELECTOR

Next: End

DHW PUMP RUNS

CABLE - PCB INPUT

Next: End

NO DHW DEMAND

CABLE - LOW VOLTAGE

Next: End

DHW PUMP RUNS

VALVE - DIFFERENTIAL - DHW (SPINDLE)

Next: End

DHW DEMAND ENDS

VALVE - DIFFERENTIAL - DHW (SPINDLE)

Next: End

DHW DEMAND ENDS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

SERVICE KIT

VALVE - DIFFERENTIAL - DHW

Next: End

CH IGNITION

PCB

Next: End

DHW PUMP RUNS

PUMP

Next: End

DHW PUMP RUNS

VALVE - 3 WAY ASSEMBLY (CH SPINDLE)

Next: End

SENSOR CH

CABLE - LOW VOLTAGE

Next: End

DHW PUMP RUNS

CABLE - LOW VOLTAGE

Next: End

FAULT CODE 50 NO SPARK

PCB

Next: End

STICKING JAMMING DHW SPINDLE

PRESSURE DIFFERENTIAL ASSEMBLY

Next: End

NO IGNITION NO OUTPUT FROM IGNITION BOARD

PCB

Next: End

FAULT CODE 30 AND 50 DEGREE LIGHT

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 30 AND 50 DEGREE LIGHT

SWITCH - AIR PRESSURE

Next: End

FAULT CODE 30 + 50

PCB

Next: End

CH OPERATION BOILER AND RADIATORS PROVIDE INSUFFICIENT HEAT

PCB

Next: End

BOILER TO TEMPERATURE RADIATORS COLD

Next: End

OVERHEAT SECTION

CABLE - FAN / PRESSURE SWITCH

Next: End

OVERHEAT SECTION 2

CABLE - FAN / PRESSURE SWITCH

Next: End

FAULT CODE 30 + 40

PCB

Next: End

DHW FLOW RATE

HEAT EXCHANGER 20 PLATES - DHW

Next: End

POOR AIRFLOW

FAN

Next: End

CH IGNITION

EXT CONTROLS / LINK

Next: End

CH IGNITION 2

PCB

Next: End

NO IGNITION CLOCK OK

PCB

Next: End

NOT RAMPING UP ON CH

PCB

Next: End

DHW PUMP RUNS

SENSOR - TEMPERATURE

Next: End

DHW MODULATION

PCB

Next: End

FAULT CODE 70

SENSOR - TEMPERATURE

Next: End

DHW TEMPERATURE LOW RADIATORS COLD

HEAT EXCHANGER 20 PLATES - DHW

Next: End

OVERHEAT INVESTIGATION

PCB

Next: End

TRIPPING EARLY

THERMOSTAT - LIMIT

Next: End

OVERHEAT INVESTIGATION

OVERHEAT

Next: End

OVERHEATING

HEAT EXCHANGER 20 PLATES - DHW

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

BLOWING FUSE

CABLE - 3-WAY VALVE MOTOR

Next: End

BLOWING FUSE

CABLE - FAN / PRESSURE SWITCH

Next: End

BLOWING FUSE

CABLE - SELECTOR SWITCH/PUMP

Next: End

BLOWING FUSE

PCB FUSE INVESTIGATION

Next: End

DHW PUMP RUNS

Next: End

BLANK FOR FUSE INVESTIGATION

Z DUMMY

Next: End

BLANK FOR FUSE INVESTIGATION 2

Z DUMMY

Next: End

RE-IGNITION DELAY

PCB

Next: End

RE IGNITION DELAY 2

PCB

Next: End

DHW PREHEAT

PCB

Next: End

FAULT CODE 60

PCB

Next: End

FAULT CODE 50 NO VOLTAGE TO FAN

PCB

Next: End

NO POWER TO FAN

CABLE - FAN / PRESSURE SWITCH

Next: End

DHW FAN RUNS

SENSOR - TEMPERATURE

Next: End

RESTRICTED STOPPING FAN RUNNING

VALVE - 3 WAY ASSEMBLY

Next: End

FAN RUNS

VALVE - 3 WAY ASSEMBLY (CH SPINDLE)

Next: End

DHW FAN RUNS

DIAPHRAGM - PRESSURE - THERMOSTAT

Next: End

BLOCKED NO FAN

HEAT EXCHANGER - PRIMARY

Next: End

DHW FAN RUNS

PCB

Next: End

NO POWER TO FAN 2

CABLE - FAN / PRESSURE SWITCH

Next: End

MAINS LED FLASHING

PCB

Next: End

EARTH LEAKAGE

GAS VALVE

Next: End

MAINS LED FLASHING 2 3

PCB

Next: End

EARTH LEAKAGE 2 3

GAS VALVE

Next: End

MAINS LED FLASHING 3 3

PCB

Next: End

EARTH LEAKAGE 3 3

GAS VALVE

Next: End

FAULT CODE 80

PCB

Next: End

OVERHEATING80 DEG OVERHEAT

HEAT EXCHANGER 20 PLATES - DHW

Next: End

FAULT CODE 80 NO FAULT OVERHEAT

SENSOR- TEMPERATURE

Next: End

FAULT CODE 70

PCB

Next: End

FAULT CODE 70

Z BLANK FOR FUSE INVESTIGATION

Next: End

DHW OPERATION

MOTOR - 3 - WAY -VALVE

Next: End

CH OPERATION

MOTOR - 3 - WAY -VALVE

Next: End

FAULT CODE 60

HEAT EXCHANGER - PRIMARY

Next: End

FAULT CODE 60

Z BLANK FOR FUSE INVESTIGATION

Next: End

FAULT CODE 30 + 40DHW DEMAND ENDS

VALVE - DIFFERENTIAL - DHW (SPINDLE)

Next: End

FAULT CODE 30 + 40DHW DEMAND ENDS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

FAULT CODE 30 + 40SERVICE KIT

VALVE - DIFFERENTIAL - DHW

Next: End

FAULT CODE 30 + 40STICKING JAMMING DHW SPINDLE

PRESSURE DIFFERENTIAL ASSEMBLY

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 - DIFFERENTIAL - DHW (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 - DIFFERENTIAL - DHW (SPINDLE)

Next: End

FAULT CODE 80 DHW DEMAND ENDS

DIAPHRAGM - DHW/DIFF - INSTANT

Next: End

FAULT CODE 80 SERVICE KIT

VALVE - DIFFERENTIAL - DHW

Next: End

FAULT CODE 80 STICKING JAMMING DHW SPINDLE

PRESSURE DIFFERENTIAL ASSEMBLY

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 - DIFFERENTIAL - DHW (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 80

MOTOR - 3 - WAY -VALVE

Next: End

FAULT CODE 30 + 40 FAULT CODE 80

MOTOR - 3 - WAY -VALVE

Next: End

DHW BURNER ESTABLISHED MECHANICAL FAILURE

GAS VALVE

Next: End

EARTH LEAKAGE 5

GAS VALVE

Next: End

FAN RUNS THEN STOPS

PCB

Next: End

MINIMUM SET WRONG ON MODUREG

GAS VALVE

Next: End

DHW BURNER ESTABLISHED

PCB

Next: End

CH OPERATION FIRES WITH NO DEMAND

PCB

Next: End

CH MODULATION

PCB

Next: End

DHW OPERATION

HEAT EXCHANGER 20 PLATES - DHW

Next: End

DHW FAN RUNS

FAN

Next: End

CH NOISY DHW OK

Next: End

DHW OPERATION

VALVE - 3 WAY ASSEMBLY

Next: End

DHW FAN RUNS

SWITCH - AIR PRESSURE

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 / LINK

Next: End

DHW BURNER IGNITION

MANIFOLD - BURNER

Next: End

CH IGNITION 22

PCB

Next: End

NO IGNITION CLOCK OK2

PCB

Next: End

FAULT 1

CABLE - GAS VALVE/IGNITER

Next: End

MECHANICAL 2

GAS VALVE

Next: End

FAULT CODE 60

PUMP

Next: End

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1002

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1004

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM INSPECTION CH DIFFERENTIAL VALVE

Next: !p1006

MAINS LED FLASHING

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p1769

MAINS LED NOT ILLUMINATED

CHARACTERISTIC TEST FROM OBSERVATION MAINS LED ILLUMINATED

Next: p1282

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1295

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1297

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1314

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1316

PUMP PULSES ON AND OFF

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p1623

PUMP DOES NOT RUN

CHARACTERISTIC TEST FROM DHW PUMP RUNS

Next: p1323

DHW noisy operation

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p352

ALL DIFFERENTIAL VALVE COMPONENTS OK

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1389

DHW temperature low, radiators cold

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p599

DHW temperature low, radiators hot

CHARACTERISTIC TEST FROM DHW OPERATION

Next: p508

BURNER IGNITES BUT BURNER PRESSURE EXCESSIVE

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p2068

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

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED

Next: p1525

BOILER DOES NOT RESPOND TO CH DEMAND

CHARACTERISTIC TEST FROM CH IGNITION

Next: p1557

BURNER IGNITES BUT PRESSURE DOES NOT BEHAVE AS DESCRIBED

CHARACTERISTIC TEST FROM CH IGNITION

Next: p2054

BOILER CONTINUES TO HEAT PAST 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1597

BOILER OVERHEATS BELOW 85 DEGREES

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1599

HOT WATER LIGHT FLASHES WITH DEMAND

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1774

BOILER AND RADIATORS ONLY GET WARM

CHARACTERISTIC TEST FROM CH OPERATION

Next: p164

BOILER UP TO TEMPERATURE RADIATORS COOL

CHARACTERISTIC TEST FROM CH OPERATION

Next: p522

NO RE IGNITION DELAY

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1663

APPLIANCE/SYSTEM COOL, BOILER DOES NOT RE-IGNITE

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: !p1665

CH noisy, DHW OK

CHARACTERISTIC TEST FROM CH OPERATION

Next: p168

DIFFERENTIAL WATERWAYS BLOCKED

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1750

SPINDLE CORRODED OR SEIZED

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1752

DIAPHRAGM SPLIT OR WORN

CHARACTERISTIC TEST FROM OBSERVATION RUN BOILER UP TO TEMPERATURE

Next: !p1754

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1881

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1886

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1888

ALL DIFFERENTIAL VALVE COMPONENTS OK

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1890

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1894

HOT WATER LIGHT REMAINS ON WITH TAP TURNED OFF

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1910

DIAPHAGM WORN AND / OR DAMAGED

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1915

DIFFERENTIAL VALVE - STUFFING BOX LEAKING

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1917

ALL DIFFERENTIAL VALVE COMPONENTS OK

CHARACTERISTIC TEST FROM INSPECTION DIFFERENTIAL VALVE DHW

Next: !p1919

HOT WATER LIGHT DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM DHW DEMAND LIGHT

Next: p1923

Fires with no demand

CHARACTERISTIC TEST FROM CH OPERATION

Next: p338

Fan does not run

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p36

Fan runs then stops

CHARACTERISTIC TEST FROM DHW FAN RUNS

Next: p1486

No sparkING PRESENT

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p1129

Sparking OK, ZERO OR LOW gas PRESSURE present

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p956

Sparking OK, gas PRESSURE present BUT no ignition

CHARACTERISTIC TEST FROM DHW BURNER IGNITION

Next: p66

BOILER STILL NOISY

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: p912

BOILER DOES NOT REACT TO CH DEMAND

CHARACTERISTIC TEST FROM RE-IGNITION DELAY

Next: p915

PRESSURE LOW OR DIES OUT

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED

Next: p2038

Burner ignites but baffles out

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED

Next: p110

BURNER IGNITES, SPARK CONTINUES, BOILER GOES TO LOCKOUT

CHARACTERISTIC TEST FROM DHW BURNER ESTABLISHED

Next: p99

03/07/2018 09:14:32 1807_1_50_1 20/07/2018 13:56:50

06/07/2018 11:17:04

Next: End

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1859, f1014

RESISTANCE HARNESS DHW

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

Next: !p1581, !f1582

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1791, f1020

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p1200, !f1022

AIR PRESSURE SWITCH RESISTANCE

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p1199, f40

RESISTANCE HARNESS APS (N/O)

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

Next: p1203, !f1214

SPARK GENERATOR (INPUT)

SELECTOR SWITCH TO D

Next: p1206, !f1207

OBSERVATION FAN RUNS PREHEAT

SELECTOR SWITCH TO D

Next: p1538, f1217

RESISTANCE HARNESS AND APS (N/C)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p1218, f1219

AIR PRESSURE SWITCH RESISTANCE

DISCONNECT THE BLUE LEAD FROM THE AIR PRESSURE SWITCH

Next: !p1220, f1221

AIR PRESSURE SWITCH TUBES

Next: p1222, !f1223

OBSERVATION BOILER RESET

ENSURE APPLIANCE IS COOL

Next: p1366, f1502

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: !p1506, !f1246

MAINS POWER SUPPLY

Next: p1285, f1651

FUSE F1 RESISTANCE

REMOVE FUSE AND HOLDER LOCATED IN THE MAIN TERMINAL BLOCK

Next: !p1289, f1656

DHW DEMAND

REMOVE DHW MICRO SWITCH HEAD

Next: !p1300, f1301

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1302, !f1303

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATE DHW COLD FEED TO BOILER
DRAIN DHW SYSTEM
REMOVE DHW DIFFERENTIAL VALVE FROM BOILER

Next: !p1312, ?1313, ?1315, ?1388

CH DEMAND MICRO SWITCH OPEN CIRCUIT

DISCONNECT CONNECTOR A5 FROM THE PCB

Next: p1326, f1327

CH SPINDLE RETRACTED

SELECTOR SWITCH IN OFF POSITION
REMOVE THE CH DIFFERENTIAL PRESSURE SWITCH MICRO SWITCH

Next: !p1355, f1329

CH DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: !p1330, !f1352

RESISTANCE HARNESS DHW

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

Next: !p1576, !f1577

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p1338, !f1350

RESISTANCE HARNESS APS (N/O)

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

Next: !p1360, !f1361

RESISTANCE GAS VALVE

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: !p1391, !f1392

RESISTANCE AIR PRESSURE SWITCH & HARNESS (NC)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p1404, f1395

RESISTANCE APS AT APS (NC)

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

Next: !p1396, f1397

AIR PRESSURE SWITCH TUBES

Next: p1398, !f1399

INSPECTION PCB LINK A10 AND A11

{GAINPCBACS}

Next: p1666, !f1479

INSPECTION PCB LINK A10 AND A11

{GAINPCBACS}

Next: p1669, !f1485

OVERHEAT THERMOSTAT RESISTANCE

REMOVE MOULDED PLUG FROM OVERHEAT THERMOSTAT

Next: !p1500, !f1499

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

REMOVE CONNECTOR A2 FROM THE PCB

Next: !p1507, f1244

WATER SUPPLY TO PREMISES

TURN ON A COLD WATER TAP

Next: p1514, !f1519

EXTERNAL CONTROLS/RTC INPUT

{GAINPCBACS}
SELE

Next: !p1560, !f1561

TIMER LINK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1564, !f1565

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: !p158, !f350

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1586, !f1585

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1607, !f1608

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1621, !f1622

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1626, !f1627

RESISTANCE PUMP AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A4 FROM THE PCB

Next: p1630, f1637

RESISTANCE PUMP FUSE INVESTIGATION

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

Next: !p1646, !f1647

RESISTANCE FAN FUSE INVESTIGATION

DISCONNECT LIVE AND NEUTRAL LEADS FROM THE FAN

Next: !p1644, !f1645

RESISTANCE DIVERTER VALVE HEAD FUSE INVESTIGATION

REMOVE ELECTRICAL CONNECTOR FROM DIVERTER VALVE HEAD

Next: !p1642, !f1643

RESISTANCE FUSE MAINS

GAIN ACCESS TO THE MAINS FUSE FOR THE APPLIANCE

Next: !p1652, f1653

FUSE FURTHER INVESTIGATION (MAINS)

Next: !p1654, !f1655

FUSE FURTHER INVESTIGATION (APPLIANCE)

Next: !p1657, !f1658

VOLTAGE FAN AT PCB PREHEAT

{GAINPCBACS}
DHW PREHEAT SELECTOR TO MAX POSITION
ENSURE APPLIANCE IS COOL

Next: !p1701, f1696

INSPECTION PCB LINK A10 AND A11

{GAINPCBACS}

Next: p1697, !f1698

VOLTAGE FAN AT PCB

{GAINPCBACS}
SELE

Next: !p1761, f1732

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1733, f1734

RESISTANCE HARNESS DHW

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

Next: !p1735, !f1736

INSPECTION SYSTEM PRESSURE

Next: p1741, !f1742

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1772, !f1773

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1784, !f1785

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1789, !f1790

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1794, !f1795

TEMPERATURE DIFFERENTIAL CH

ATTACH FGA TEMPERATU

Next: !p1819, !f1820

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1862, !f1863

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATE DHW COLD FEED TO BOILER
DRAIN DHW SYSTEM
REMOVE DHW DIFFERENTIAL VALVE FROM BOILER

Next: !p1884, ?1885, ?1887, ?1889

DHW DEMAND

REMOVE DHW MICRO SWITCH HEAD

Next: !p1897, f1898

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1899, !f1900

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1907, !f1908

INSPECTION DIFFERENTIAL VALVE DHW

ISOLATE DHW COLD FEED TO BOILER
DRAIN DHW SYSTEM
REMOVE DHW DIFFERENTIAL VALVE FROM BOILER

Next: !p1913, ?1914, ?1916, ?1918

DHW DEMAND

REMOVE DHW MICRO SWITCH HEAD

Next: !p1926, f1927

DHW DIAPHRAGM

BOILER DRAINED AND DISCHARGED

Next: p1928, !f1929

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p1936, !f1937

DIVERTER VALVE VOLTAGE

{GAINPCBACS}
SELE

Next: p1968, !f1969

DIVERTER VALVE VOLTAGE

{GAINPCBACS}
SELE

Next: p2019, !f2020

EARTH LEAKAGE CHECK GAS VALVE DISCONNECTED

REMOVE THE CONNECTOR FROM THE GAS VALVE

Next: !p2065, !f2066

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p342, !f351

AIR PRESSURE SWITCH TUBES

Next: p51, !f52

DIVERTER VALVE VOLTAGE

{GAINPCBACS}
SELE

Next: p1866, !f512

DIVERTER VALVE VOLTAGE

{GAINPCBACS}
SELE

Next: p1869, !f526

EXTERNAL CONTROLS/RTC INPUT

{GAINPCBACS}
SELE

Next: !p918, !f919

TIMER LINK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p922, !f923

VOLTAGE GAS VALVE AT PCB

SELECTOR SWITCH TO D

Next: !p962, f1390

OBSERVATION PUMP RUNS PREHEAT

SELECTOR SWITCH TO D

Next: p989, f990

VOLTAGE PUMP PREHEAT

{GAINPCBACS}
SELE

Next: !p991, f1483

SYSTEM WATER PRESSURE

Next: p1420, !f996

FLAME SENSE LEAD

Next: p310, !f103

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p111, !f769

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p767, !f768

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1130, !f1131

OBSERVATION SPARKING WITH APS PROVEN

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

Next: p1132, f1202

AIR PRESSURE SWITCH TUBES

Next: p1144, !f1145

VENTURI

Next: p1146, !f1147

FLUE

Next: !p1148, !f1149

SPARK GENERATOR (OUTPUT)

REMOVE THE LEAD FROM

Next: p1204, f1205

SPARK ELECTRODE GAP

Next: !p1210, !f1211

ELECTRODE LEAD

REMOVE THE ELECTRODE LEAD

Next: !p1208, !f1209

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1228, !f1229

VOLTAGE FAN PREHEAT

DHW PREHEAT SELECTOR TO MAX POSITION
ENSURE APPLIANCE IS COOL

Next: !p1226, f1690

VENTURI

Next: !p1224, !f1225

OBSERVATION SPARKING WITH APS PROVEN

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

Next: p1230, f1359

AIR PRESSURE SWITCH TUBES

Next: p1232, !f1233

VENTURI

Next: p1234, !f1235

FLUE

Next: !p1236, !f1237

POWER TO CONTROL BOARD

{GAINPCBACS}
SELECTOR SWITCH TO DHW POSITION

Next: !p1283, f1284

SELECTOR SWITCH VOLTAGE

SELECTOR SWITCH TO OFF POSITION

Next: !p1287, f1288

OPERATION DIFFERENTIAL VALVE DHW

REMOVE DHW MICRO SWITCH HEAD

Next: p1310, f1311

DHW DEMAND MICRO SWITCH OPERATION

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1781, f1299

DHW SENSING PIPES

DHW ISOLATED AND DISCHARGED

Next: p1304, !f1305

INSPECTION FILTER AND VENTURI CARTRIDGE

DHW ISOLATED AND DISCHARGED
REMOVE THE FILTER/VENTURI CARTRIDGE FROM THE RIGHT HAND HYDRO BLOCK

Next: !p1306, !f1307

RESISTANCE DHW MICROSWITCH AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p1317, !f1318

PUMP VOLTS DHW

{GAINPCBACS}
SELE

Next: !p1324, f1325

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1332, f1333

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1336, f1337

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: p1786, !f1349

INSPECTION PRESSURE SYSTEM

Next: p1407, !f1375

PUMP LIMPET

Next: p1368, !f1376

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1369, !f1377

CH SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1589, !f1378

RESISTANCE MODULATING SOLENOID

REMOVE THE BLACK LEADS FROM THE MODULATING SOLENOID

Next: p226, !f1386

VENTURI

Next: !p1400, !f1401

RESISTANCE FAN

DISCONNECT LIVE AND NEUTRAL LEADS FROM THE FAN

Next: !p1405, !f1406

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1825, !f1419

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p995, !f1432

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p527, !f1437

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p169, !f1442

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1460, !f1461

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1463, !f1464

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: p1873, !f1467

RESISTANCE OVERHEAT THERMOSTAT AND HARNESS

REMOVE CONNECTOR A2 FROM THE PCB

Next: p2062, f1497

DHW INLET FILTER

DHW CIRCUIT OF APPLIANCE DRAINED AND DISCHARGED.

Next: p1515, !f1516

DHW FLOW RESTRICTOR/FILTER

DHW ISOLATED, DRAINED AND DISCHARGED

Next: !p1517, !f1518

RESISTANCE AIR PRESSURE SWITCH WITH KIT

DISCONNECT LEADS FROM THE AIR PRESSURE SWITCH NOTING THE CONNECTIONS

Next: p1529, !f1523

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}
DHW PREHEAT SELECTOR TO MAX POSITION

Next: p1521, !f1528

AIR PRESSURE SWITCH TUBES

Next: p1530, !f1531

PRIMARY HEAT EXCHANGER FLUE WAYS

Next: p1532, !f1533

INSPECTION FLUE

Next: p1534, !f1535

VENTURI

Next: !p1536, !f1537

VOLTAGE FAN AT PCB AIR FLOW

{GAINPCBACS}
DHW PREHEAT SELECTOR TO MAX POSITION

Next: p1216, !f1552

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1572, !f1573

EXTERNAL CONTROLS/RTC OUTPUT

{GAINPCBACS}
SELE

Next: p1558, f1559

CLOCK FITTED

Next: p1562, f1563

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p1568, !f1569

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p1566, !f1567

CLOCK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB
SET CLOCK TO OFF POSITION

Next: !p1570, !f1571

INSPECTION PCB THERMOSTAT CONTROLS

Next: !p1574, !f1575

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p1592, f1591

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1593, !f1594

OBSERVATION RUN BOILER UP TO TEMPERATURE

CH TEMPERATURE SELEC

Next: p1601, ?1596, ?1598

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1606, !f1603

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1619, f1620

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1624, f1625

RESISTANCE FAN AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A2 FROM THE PCB

Next: p1677, f1638

RESISTANCE DIVERTER VALVE AND HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A8 FROM THE PCB
REMOVE DIVERTER VALVE HEAD FROM BODY

Next: p1634, f1639

DIODE TEST GAS VALVE HARNESS FUSE INVESTIGATION

REMOVE THE CONNECTOR

Next: p1648, !f1641

RESISTANCE GAS VALVE FUSE INVESTIGATION

DISCONNECT CONNECTOR PLUG FROM GAS VALVE

Next: p1632, !f1640

PUMP LIMPET TEST

Next: p1438, !f170

RESISTANCE GAS VALVE HARNESS FUSE INVESTIGATION

REMOVE CONNECTOR A1 FROM THE PCB

Next: !p1649, !f1650

INSPECTION PCB THERMOSTAT CONTROLS

Next: !p1667, !f1668

INSPECTION PCB THERMOSTAT CONTROLS

Next: !p1670, !f1676

INSPECTION WATER INGRESS TO DIVERTER VALVE HEAD

REMOVE DIVERTER VALVE HEAD FROM BODY

Next: p1631, !f1689

PUMP LIMPET TEST

Next: p187, !f188

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1459, !f172

INSPECTION PCB THERMOSTAT CONTROLS

Next: !p1699, !f1700

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p1737, !f1738

CH SPINDLE

SELECTOR SWITCH IN O

Next: p1739, f1740

CH DEMAND MICRO SWITCH OPERATION

REMOVE DHW MICROSWIT

Next: p1757, !f1758

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1743, !f1744

PUMP LIMPET

Next: p1745, !f1746

INSPECTION CH DIFFERENTIAL VALVE

DRAIN APPLIANCE PRIM

Next: p1747, ?1749, ?1751, ?1753

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1755, !f1756

SELECTOR SWITCH (LOCKOUT/RESET)

REMOVE RED AND BLUE

Next: !p1759, !f1760

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1770, f1771

INSPECTION PCB THERMOSTAT CONTROLS

Next: p1618, !f1780

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1782, f1783

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1787, f1788

OBSERVATION BOILER RESET (CH SENSOR)

DHW TEMPERATURE SELECTOR TO MAX

Next: p1792, f1793

INSPECTION PRESSURE SYSTEM

Next: p1796, !f1797

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p1798, !f1799

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1938, ?1909, ?1922

PUMP LIMPET

Next: p1813, !f1814

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1815, !f1816

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p1817, f1818

PRESSURE BURNER MAXIMUM AND MINIMUM

ATTACH PRESSURE GAUG

Next: p1821, !f1822

INSPECTION FILTER RETURN

APPLIANCE PRIMARY WA

Next: !p1823, !f1824

DHW DEMAND LIGHT (OVERHEAT)

TURN HOT WATER TAP O

Next: p1972, ?1880, ?1893

OBSERVATION BOILER RESET (DHW SENSOR)

Next: p1860, f1861

OBSERVATION RUN BOILER ON DHW

DHW TEMPERATURE SELECTOR TO MAX

Next: !p1864, !f1865

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR A8 FROM THE PCB
DISCONNECT PLUG FROM DIVERTER VALVE

Next: !p1867, !f1868

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR A8 FROM THE PCB
DISCONNECT PLUG FROM DIVERTER VALVE

Next: !p1870, !f1872

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p414, !f190

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p1875, !f1876

OBSERVATION BOILER OPERATION (60 DEGREE)

DHW TEMPERATURE SELECTOR TO MAX

Next: !p1878, !f1879

OPERATION DIFFERENTIAL VALVE DHW

REMOVE DHW MICRO SWITCH HEAD

Next: p1882, f1883

RESISTANCE DHW MICROSWITCH AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p1891, !f1892

DHW DEMAND MICRO SWITCH OPERATION

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1895, f1896

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1905, f1906

DHW SENSING PIPES

DHW ISOLATED AND DISCHARGED

Next: p1901, !f1902

INSPECTION FILTER AND VENTURI CARTRIDGE

DHW ISOLATED AND DISCHARGED
REMOVE THE FILTER/VENTURI CARTRIDGE FROM THE RIGHT HAND HYDRO BLOCK

Next: !p1903, !f1904

OPERATION DIFFERENTIAL VALVE DHW

REMOVE DHW MICRO SWITCH HEAD

Next: p1911, f1912

RESISTANCE DHW MICROSWITCH AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB
DHW TAPS OFF

Next: !p1920, !f1921

DHW DEMAND MICRO SWITCH OPERATION

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1924, f1925

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p1934, f1935

DHW SENSING PIPES

DHW ISOLATED AND DISCHARGED

Next: p1930, !f1931

INSPECTION FILTER AND VENTURI CARTRIDGE

DHW ISOLATED AND DISCHARGED
REMOVE THE FILTER/VENTURI CARTRIDGE FROM THE RIGHT HAND HYDRO BLOCK

Next: !p1932, !f1933

DIVERTER VALVE HEAD

SELECTOR SWITCH TO D

Next: p1952, f1967

DIVERTER VALVE BODY

REMOVE DIVERTER VALVE HEAD

Next: p1800, !f1966

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR A8 FROM THE PCB
DISCONNECT PLUG FROM DIVERTER VALVE

Next: !p1970, !f1971

DIVERTER VALVE HEAD

SELECTOR SWITCH TO D

Next: p1994, f2018

DIVERTER VALVE BODY

REMOVE DIVERTER VALVE HEAD

Next: p1367, !f2016

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR A8 FROM THE PCB
DISCONNECT PLUG FROM DIVERTER VALVE

Next: !p2021, !f2022

INSPECTION COMPENSATION PIPE

Next: p95, !f2037

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p2025, !f2052

INSPECTION COMPENSATION PIPE

Next: p1556, !f2060

EARTH LEAKAGE CHECK GAS VALVE AND HARNESS

Next: !p2067, f2064

INSPECTION COMPENSATION PIPE

Next: !p2069, !f2070

INSPECTION COMPENSATION PIPE

Next: p960, !f2079

MODULATING SOLENOID VOLTAGE

SELECTOR SWITCH TO D

Next: !p2053, !f228

FLAME SENSE GAP

Next: !p311, !f312

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: !p339, !f340

CH OPERATION

SELECTOR SWITCH TO D

Next: !p353, ?908, ?910

RESISTANCE HARNESS AND APS (N/C)

{GAINPCBACS}
DISCONNECT CONNECTOR A2 FROM THE PCB

Next: p39, f1193

FAN VOLTS

SELECTOR SWITCH TO O

Next: !p41, f1702

DIVERTER VALVE HEAD

SELECTOR SWITCH TO D

Next: !p516, f510

VENTURI

Next: !p765, !f54

DIVERTER VALVE HEAD

SELECTOR SWITCH TO D

Next: p523, f524

DIVERTER VALVE BODY

REMOVE DIVERTER VALVE HEAD

Next: p1433, !f528

PUMP LIMPET TEST

Next: p1462, !f530

PRESSURE DIFFERENTIAL ASSEMBLY (NON RETURN VALVE)

SET FLOW RATE TO APP

Next: p838, !f603

SPARK ELECTRODE GAP

Next: !p92, !f93

INSPECTION FLUE

Next: !p772, !f771

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p1380, !f827

DHW SENSOR RESISTANCE AND HARNESS

REMOVE CONNECTOR A5 FROM THE PCB

Next: p831, !f835

INSPECTION PCB THERMOSTAT CONTROLS

Next: p833, !f834

INSPECTION BURNER INJECTORS

REMOVE BURNER ASSEMBLY

Next: !p836, !f847

TEMPERATURE DIFFERENTIAL DHW

ATTACH FGA TEMPERATU

Next: p830, f1583

BYPASS CHECK

BOILER DRAINED AND DISCHARGED

Next: !p913, !f914

EXTERNAL CONTROLS/RTC OUTPUT

{GAINPCBACS}
SELE

Next: p916, f917

CLOCK FITTED

Next: p920, f921

CLOCK IN VOLTS INPUT

SELECTOR SWITCH TO D

Next: p926, !f927

TIMER LINK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB

Next: !p924, !f925

CLOCK RESISTANCE

DISCONNECT CONNECTOR A3 FROM THE PCB
SET CLOCK TO OFF POSITION

Next: !p928, !f929

CH SENSOR RESISTANCE

REMOVE CONNECTOR FROM CH THERMISTOR

Next: p819, !f116

GAS INLET PRESSURE

ATTACH PRESSURE GAUG

Next: p2071, !f958

VOLTAGE GAS VALVE AT GAS VALVE

{GAINPCBACS}
SELE

Next: !p964, f961

CH SPINDLE

SELECTOR SWITCH IN O

Next: p993, f994

FLAME SENSE ELECTRODE

Next: p100, !f101

CH DEMAND MICRO SWITCH OPERATION

REMOVE DHW MICROSWIT

Next: p1877, !f1353

PUMP LIMPET

Next: p997, !f998

INSPECTION CH DIFFERENTIAL VALVE

DRAIN APPLIANCE PRIM

Next: p1465, ?1001, ?1003, ?1005

System Information

  • Total Tests: 628
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control