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:

VAILLANT ECOFIT PURE AND SUSTAIN

GLOBALLY REPLACED

Next: &1, *

NO FAULT FOUND

Next: nff

CASE REMOVAL

Next: &3, !f2

START UP DISPLAY

ENSURE NO DEMANDS

Next: &91, ?576, ?587, ?591, ?1042

SELF CHECK AND APPLIANCE SET UP

ENSURE NO DEMANDS

Next: &135, ?195, ?197, ?199, ?1024

TYPE OF DIAGNOSTIC PROCEDURE

Next: &137, !f136

FLOW RATE DHW

Next: &150, f138

OBSERVATION FAN RUNS DHW

TURN HOT WATER TAP ON WITH A FLOW RATE OF 4 L/MIN

Next: &230, ?151, ?153

OBSERVATION BURNER IGNITION AND ESTABLISH

BOILER DHW THERMOSTAT SETTING TO MAX

Next: &440, ?234, ?236, ?429

OBSERVATION BOILER RESPONDS TO CH DEMAND

BOILER CH THERMOSTAT SETTING TO MAX

Next: &461, f441

OPERATION DHW

Next: &475, ?463, ?465, ?467, ?469, ?867

OPERATION CENTRAL HEATING

Next: &864, ?476, ?478, ?480

DIAGNOSTIC CODES GUIDE

Next: &nff, !f625

HEADER FOR FLOW THERMISTOR FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f627

HEADER FOR RETURN THERMISTOR FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f633

HEADER FOR F70 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f639

HEADER FOR F75 AND F22 FAULT CODE

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f643

HEADER FOR F73 AND F74

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f672

HEADER FOR F64, F71, F84 AND F85

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f678

OVERHEAT INVESTIGATION

Next: &nff, f702

HEADER FOR F89

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f743

HEADER FOR F61 AND F88

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f769

HEADER FOR F49

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f775

HEADER FOR F86

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f781

HEADER FOR FAULT CODE CON OR ERR

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f789

HEADER FOR F67 AND F87

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f795

HEADER FOR F62 AND F27

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f800

HEADER FOR F29

INTENTIONALLY BLANK HEADER FOR FAULT CODE

Next: &nff, f808

FAULT CODE HISTORY GUIDE

RESET THE APPLIANCE

Next: &nff, !f848

HEADER FOR FUSE INVESTIGATION

INTENTIONALLY BLANK HEADER FOR FUSE INVESTIGATION

Next: &nff, f850

OPERATION PUMP OVERRUN

Next: &nff, !f865

INSPECTION FAN INTAKE - OUTSIDE MODEL SEE BUILD AND DEVELOPMENT

REMOVE THE AIR INTAKE DUCT FROM THE FAN ASSEMBLY

Next: &nff, !f1009

USER DISPLAY GUIDE

THE USER DISPLAY ON

Next: &nff, !f1029

CALLING UP THE FAULT CODE HISTORY

Next: &nff, !f1036

INFORMATION FOR OBSERVATION ADJUSTMENT DSN DISPLAY OPERATES

THE PCB'S OPERATING

Next: &nff, !f1047

QUICK ACCESS DATA AND INFORMATION

THE TABLE BELOW SHOW

Next: &nff, !f1049

LITE DIAGNOSTIC

DIAGNOSIS RELIES ON

Next: &nff, !f1051

HEADER FOR QADAI FLOW THERMISTOR

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1053

HEADER FOR QADAI RETURN THERMISTOR

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1057

HEADER FOR QADAI DIVERTER VALVE VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1061

HEADER FOR QADAI DIVERTER VALVE RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1065

HEADER FOR QADAI DHW FLOW TURBINE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1069

HEADER FOR QADAI GAS VALVE VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1073

HEADER FOR QADAI GAS VALVE RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1077

HEADER FOR QADAI PUMP RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1081

HEADER FOR QADAI AC VOLTAGE TO PUMP

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1085

HEADER FOR QADAI PUMP DC VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1089

HEADER FOR QADAI FAN AC VOLTAGE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1093

HEADER FOR QADAI FAN AC RESISTANCE

INTENTIONALLY BLANK - HEADER FOR QADAI

Next: &nff, f1097

RESTRICTED OR BLOCKED / PERFORATED

FLUE

Next: End

WARPED / DISTORTED OR DAMAGED

BURNER

Next: End

RESTRICTED OR BLOCKED FLUEWAYS

HEAT EXCHANGER

Next: End

AIR INTAKE RESTRICTED OR BLOCKED

FAN C/W COMBUSTION CHAMBER COVER

Next: End

MIXING WATER

PLUMBING ISSUE

Next: End

OUT OF CALIBRATION FROST PROTECTION

SENSOR

Next: End

OUT OF CALIBRATION FROST PROTECTION

SENSOR

Next: End

SHOWING SPANNER

PCB

Next: End

FOR USER DISPLAY GUIDE

Z DIRECTION CHOICE OR CONTINUE

Next: End

PUMP RUNNING CONTINUOUSLY

PCB

Next: End

PUMP SPEED CONTROL SECTION 4

HARNESS WIRING

Next: End

CALLING UP FAULT CODE HISTORY

Z REDIRECTION

Next: End

SHORTED 2

FLOW SENSOR

Next: End

FAULTY SECTION TO DHW TURBINE (SHORTED)

HARNESS WIRING

Next: End

CORRUPTED SOFTWARE DB15046 & DB15117

PCB

Next: End

BLANK INFORMATION PAGE FOR DSN ADJUSTMENT

Z REDIRECTION

Next: End

BLANK FOR QADAI

Z REDIRECTION

Next: End

BLANK FOR LITE DIAGNOSTIC

Z REDIRECTION

Next: End

QADAI

SENSOR

Next: End

QADAI

SENSOR

Next: End

QADAI VOLTAGE TO DIVERTER MOTOR

PCB

Next: End

QADAI

VALVE - DIVERTER

Next: End

QADAI

FLOW SENSOR

Next: End

QADAI GAS VALVE TOP SOLENOID VOLTAGE

PCB

Next: End

QADAI

GAS CONTROL VALVE

Next: End

QADAI

PUMP MOTOR

Next: End

QADAI NO POWER TO PUMP

PCB

Next: End

QADAI NO DC TO PUMP

PCB

Next: End

QADAI NO AC VOLTAGE TO FAN

PCB

Next: End

QADAI

FAN C/W COMBUSTION CHAMBER COVER

Next: End

BLANK FOR TYPE OF DIAGNOSITC PROCEDURE

Z REDIRECTION

Next: End

POOR

COLD WATER SUPPLY

Next: End

OFF OR PARTIALLY OFF

VALVES - HYDRAULIC

Next: End

RESTRICTED OR BLOCKED

FILTER

Next: End

RESTRICTED OR BLOCKED

FLOW SENSOR

Next: End

NO POWER TO FAN

HARNESS - WIRING - FAN

Next: End

FAULTY 2

HARNESS - WIRING

Next: End

NO DEMAND TO RUN FAN

SENSOR

Next: End

NO DEMAND TO RUN FAN

SENSOR

Next: End

FAULTY SECTION TO DHW TURBINE

HARNESS WIRING

Next: End

FAN DOES NOT RUN

THERMISTOR FITMENT

Next: End

READING STUCK

SENSOR

Next: End

CASE OFF

Z REDIRECTION

Next: End

FAULTY

HARNESS - WIRING

Next: End

NO PERMANENT DC VOLTAGE TO FAN

PCB

Next: End

FAN CIRCUITRY RUNNING CONTINUOUSLY

FAN C/W COMBUSTION CHAMBER COVER

Next: End

SELF TEST 3

PCB

Next: End

PUMP RUNNING CONTINUOUSLY

THERMISTOR FITMENT

Next: End

READING STUCK 2

SENSOR

Next: End

FAULTY GROUND

FAN C/W COMBUSTION CHAMBER COVER

Next: End

RESTRICTED OR BLOCKED

SYPHON

Next: End

LOW

GAS INLET PRESSURE

Next: End

RESTRICTED OR BLOCKED / POORLY SEALED

DUCT - AIR INLET

Next: End

RESTRICTED OR BLOCKED / POORLY SEALED 2

DUCT - AIR INLET

Next: End

RESTRICTED OR BLOCKED

FLUE

Next: End

RESTRICTED / BLOCKED

BURNER

Next: End

WARPED OR HIGH RESISTANCE

ELECTRODE IGNITION AND SENSING

Next: End

SECTION TO SPARK GENERATOR 2

HARNESS - WIRING - HEAT ENGINE

Next: End

RESTRICTED OR BLOCKED FLUEWAYS 2

HEAT EXCHANGER

Next: End

NO SPARK OR WARPED

ELECTRODE IGNITION AND SENSING

Next: End

FAULTY 3

HARNESS - WIRING

Next: End

SECTION TO SPARK GENERATOR

HARNESS - WIRING - HEAT ENGINE

Next: End

RESTRICTED OR BLOCKED / [POORLY SEALED 3

DUCT - AIR INLET

Next: End

RESTRICTED OR BLOCKED 2

FLUE

Next: End

RESTRICTED OR BLOCKED 2

BURNER

Next: End

RESTRICTED OR BLOCKED FLUEWAYS 3

HEAT EXCHANGER

Next: End

GAS VALVE DAMAGED PCB

GAS CONTROL VALVE AND PCB

Next: End

LOW 2

GAS INLET PRESSURE

Next: End

RESTRICTED OR BLOCKED 2

SYPHON

Next: End

FAULTY 3 FAULT CODE

HARNESS - WIRING

Next: End

READING STUCK

SENSOR

Next: End

READING STUCK 2

SENSOR

Next: End

CH DOES NOT RESPOND

PCB

Next: End

CH DOES NOT RESPOND 1

PCB

Next: End

CH DOES NOT RESPOND 2

PCB

Next: End

CH DOES NOT RESPOND 4

PCB

Next: End

CH DOES NOT RESPOND 3

PCB

Next: End

INCORRECT OR NO VOLTAGES TO DIVERTER VALVE

PCB

Next: End

DIVERTER VALVE SECTION FAULTY

HARNESS WIRING

Next: End

NO CHARGE

EXPANSION VESSEL

Next: End

OUT OF CALIBRATION

SENSOR

Next: End

OUT OF CALIBRATION

SENSOR

Next: End

NOT READING FOR DHW

THERMISTOR FITMENT

Next: End

INCORRECTLY SET

PARAMETER - HEATING POWER

Next: End

OUT OF CALIBRATION 2

SENSOR

Next: End

OUT OF CALIBRATION 2

SENSOR

Next: End

SYSTEM BLOCKAGE

Next: End

OPEN TOO MUCH

Next: End

WEAK OR SLOW

PUMP MOTOR

Next: End

INCORRECT OR NO VOLTAGES TO DIVERTER VALVE CH

PCB

Next: End

DIVERTER VALVE SECTION FAULTY CH

HARNESS WIRING

Next: End

CLOSED OR ONLY PARTIALLY OPEN

VALVES - HYDRAULIC AND VALVE - SERVICE

Next: End

LOW 3

GAS INLET PRESSURE

Next: End

POOR DHW

THERMISTOR FITMENT

Next: End

OUT OF CALIBRATION 3

SENSOR

Next: End

OUT OF CALIBRATION 3

SENSOR

Next: End

RESTRICTED WATERWAYS

HEAT EXCHANGER

Next: End

RESTRICTED OR BLOCKED

FILTER

Next: End

POOR DHW 2

THERMISTOR FITMENT

Next: End

OUT OF CALIBRATION 3 2

SENSOR

Next: End

OUT OF CALIBRATION 3 2

SENSOR

Next: End

WEAK OR SLOW 3

PUMP MOTOR

Next: End

RESTRICTED OR BLOCKED 2

FILTER

Next: End

WEAK OR SLOW 2

PUMP MOTOR

Next: End

SET INCORRECTLY LOW OUTPUT

PARAMETER DSN

Next: End

RESTRICTED WATERWAYS 2

HEAT EXCHANGER

Next: End

LOW

SYSTEM PRESSURE

Next: End

BLANK FOR FAULT CODES 2

Z REDIRECTION

Next: End

NO DISPLAY

FUSE (FUSED SPUR)

Next: End

NO DISPLAY

FUSE PCB

Next: End

NO DISPLAY

PCB

Next: End

SHORTED CAUSING BLANK DISPLAY

SENSOR - PRESSURE

Next: End

SHORTED

FLOW SENSOR

Next: End

SPEED CONTROL SHORTED

PUMP MOTOR

Next: End

FAULTY

HARNESS WIRING

Next: End

FAULTY 4

HARNESS - WIRING

Next: End

BLANK FOR HEATING POWER DIAGNOSTIC CODES

Z REDIRECTION

Next: End

FAULT CODE

SENSOR

Next: End

FAULT CODE

SENSOR

Next: End

INCORRECTLY SET

PARAMETER DSN

Next: End

NO POWER TO PUMP

PCB

Next: End

FAULTY

HARNESS - WIRING

Next: End

LOW OR AIR PRESENT

SYSTEM PRESSURE

Next: End

WEAK OR SLOW 4

PUMP MOTOR

Next: End

NO PUMP SPEED CONTROL POWER

PCB

Next: End

PUMP SPEED CONTROL SECTION

HARNESS WIRING

Next: End

RESTRICTED OR BLOCKED 3

FILTER

Next: End

FAULTY SECTION TO PRESSURE SENSOR

HARNESS WIRING

Next: End

VOLTAGE TO PRESSURE SENSOR

PCB

Next: End

FAULT CODE THERMISTOR ISSUES

SENSOR

Next: End

FAULT CODE THERMISTOR ISSUES

SENSOR

Next: End

FAULT CODE F64 AND F71

THERMISTOR FITMENT

Next: End

OVERHEAT

THERMISTOR FITMENT

Next: End

SYSTEM PRESSURE

SYSTEM PRESSURE

Next: End

WEAK OR SLOW OVERHEAT

PUMP MOTOR

Next: End

OVERHEAT

PCB

Next: End

OVERHEAT

SENSOR

Next: End

OVERHEAT

SENSOR

Next: End

NO POWER TO PUMP OVERHEAT

PCB

Next: End

FAULTY OVERHEAT

HARNESS - WIRING

Next: End

OVERHEAT

HEAT EXCHANGER

Next: End

OVERHEAT

FILTER

Next: End

FAULT CODE

HARNESS - WIRING

Next: End

PUMP SPEED CONTROL SECTION 2

HARNESS WIRING

Next: End

PUMP SPEED CONTROL SECTION 3

HARNESS WIRING

Next: End

FAULT CODE 2

HARNESS - WIRING

Next: End

FAULT CODE

GAS CONTROL VALVE

Next: End

F49 FAULT CODE

PCB

Next: End

FAULT CODE

EBUS CONTROLS

Next: End

MISSING

LINK

Next: End

FAULT CODE F86

UNDERFLOOR HEATING CONTROLS

Next: End

CONNECTION FAULT CODE

PCB

Next: End

FAULT CODE F87

ELECTRODE IGNITION AND SENSING

Next: End

ERROR CODE

HARNESS WIRING

Next: End

FAULT CODE F62 AND F27

ELECTRODE IGNITION AND SENSING

Next: End

PASSING WITH FAN PRESSURE

GAS CONTROL VALVE

Next: End

PASSING WITH NO FAN PRESSURE

GAS CONTROL VALVE

Next: End

FAULT CODE F29

DUCT - AIR INLET

Next: End

FAULT CODE F29

ELECTRODE IGNITION AND SENSING

Next: End

FAULT CODE F29

HARNESS - WIRING - HEAT ENGINE

Next: End

FAULT CODE F29

FLUE

Next: End

FAULT CODE F29

BURNER

Next: End

FAULT CODE F29

HEAT EXCHANGER

Next: End

FAULT CODE F29

SYPHON

Next: End

FAULT CODE F29

GAS INLET PRESSURE

Next: End

BLANK FOR FAULT CODE HISTORY

Z REDIRECTION

Next: End

FUSE INVESTIGATION

HARNESS - WIRING

Next: End

FUSE INVESTIGATION

HARNESS - WIRING - FAN

Next: End

BOILER FIRES SELF TEST

PCB

Next: End

FAULTY PUMP OVERRUN

PCB

Next: End

FAULT PUMP OVERRUN 2

PCB

Next: End

POOR DHW S53/54

THERMISTOR FITMENT

Next: End

OUT OF CALIBRATION S53/54

SENSOR

Next: End

OUT OF CALIBRATION S53/54

SENSOR

Next: End

WEAK OR SLOW S53/54

PUMP MOTOR

Next: End

RESTRICTED WATERWAYS S53/54

HEAT EXCHANGER

Next: End

RESTRICTED OR BLOCKED S53/54

FILTER

Next: End

LOW FAN PRESSURE AT MAX

SYPHON

Next: End

LOW FAN PRESSURE

FLUE

Next: End

LOW FAN PRESSURE

BURNER

Next: End

LOW FAN PRESSURE

HEAT EXCHANGER

Next: End

RESTRICTED OR BLOCKED POOR DHW

DUCT - AIR INLET

Next: End

AIR IN BOILER

SYSTEM PRESSURE

Next: End

AIR IN BOILER 2

SYSTEM PRESSURE

Next: End

AIR IN BOILER 3

SYSTEM PRESSURE

Next: End

CAUSING BLANK DISPLAY

VALVE - DIVERTER

Next: End

LEAKING

FLUE PIPE GASKETS

Next: End

BAFFLING WRONG MIX

GAS CONTROL VALVE

Next: End

POOR DHW

PCB

Next: End

NOT RECOGNISING DEMAND

FLOW SENSOR

Next: End

CORRECTLY ACTIVATED

FROST PROTECTION

Next: End

SPANNER IN DISPLAY

MAINTENANCE INTERVAL SURPASSED

Next: End

NOT RESPONDING TO SPEED SIGNAL

PUMP MOTOR

Next: End

DHW NOT RECOGNISED

PCB

Next: End

HARD RESET PCB

HARD RESET PCB

Next: End

FLOW THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

RETURN THERMISTOR SATISFACTORY

RESULT AS EXPECTED

Next: End

PCB VOLTAGE TO DIVERTER VALVE

RESULT AS EXPECTED

Next: End

DIVERTER VALVE MOTOR

RESULT AS EXPECTED

Next: End

DHW FLOW TURBINE

RESULT AS EXPECTED

Next: End

PCB GAS VALVE VOLTAGE TOP SOLENOID

RESULT AS EXPECTED

Next: End

GAS VALVE TOP SOLENOID

RESULT AS EXPECTED

Next: End

PUMP

RESULT AS EXPECTED

Next: End

PCB POWER TO PUMP AC

RESULT AS EXPECTED

Next: End

PCB DC POWER TO PUMP

RESULT AS EXPECTED

Next: End

QADAI PCB AC VOLTAGE TO FAN

RESULT AS EXPECTED

Next: End

FAN AC RESISTANCE

RESULT AS EXPECTED

Next: End

RESTRICTED OR BLOCKED DHW SIDE

HEAT EXCHANGER 18 PLATES

Next: End

NOT RUNNING WITH DEMAND

FAN C/W COMBUSTION CHAMBER COVER

Next: End

NO 240 AC TO FAN

PCB

Next: End

FAULTY FAN SECTION

HARNESS - WIRING - HEAT ENGINE

Next: End

NO DEMAND TO RUN FAN

PCB

Next: End

DHW NOT RECOGNISED 2

PCB

Next: End

FAULTY FAN SECTION 2

HARNESS - WIRING - HEAT ENGINE

Next: End

SELF TEST

EBUS CONTROLS

Next: End

BOILER FIRES SELF TEST

Next: End

PUMP RUNNING CONTINUOUSLY 2

PCB

Next: End

FAN RUNNING CONTINUOUSLY

PCB

Next: End

NOT RECOGNISING FLAME

PCB

Next: End

NOT ESTABLISHING WRONG MIX

GAS CONTROL VALVE

Next: End

RESTRICTED OR BLOCKED

PIPE - FLUE

Next: End

RESTRICTED OR BLOCKED 2

DRAIN - CONDENSATE (SUMP)

Next: End

RESTRICTED OR BLOCKED

FLUE PIPE GASKETS

Next: End

NOT RECTIFYING

IGNITOR

Next: End

LOW FAN PRESSURE

FAN C/W COMBUSTION CHAMBER COVER

Next: End

NO POWER TO SPARK GENERATOR

PCB

Next: End

FAULTY HALL SENSOR

FAN C/W COMBUSTION CHAMBER COVER

Next: End

FAULTY FAN SECTION 3

HARNESS - WIRING - HEAT ENGINE

Next: End

NO SPARK

IGNITOR

Next: End

NOT IGNITING WRONG MIX

GAS CONTROL VALVE

Next: End

RESTRICTED OR BLOCKED 2

PIPE - FLUE

Next: End

RESTRICTED OR BLOCKED 3

DRAIN - CONDENSATE (SUMP)

Next: End

RESTRICTED OR BLOCKED 2

FLUE PIPE GASKETS

Next: End

LOW FAN PRESSURE NOT IGNITING

FAN C/W COMBUSTION CHAMBER COVER

Next: End

NOT IGNITING NOT OPENING

GAS CONTROL VALVE

Next: End

NO POWER TO GAS VALVE

PCB

Next: End

HARNESS DAMAGED GAS VALVE

HARNESS HEAT ENGINE AND PCB

Next: End

NO POWER TO SPARK GENERATOR FAULT CODE

PCB

Next: End

FAULTY HALL SENSOR FAULT CODE

FAN C/W COMBUSTION CHAMBER COVER

Next: End

FAULTY FAN SECTION 3 FAULT CODE

HARNESS - WIRING - HEAT ENGINE

Next: End

CH DOES NOT RESPOND

EBUS CONTROLS

Next: End

CH DOES NOT RESPOND 4

Next: End

CH DOES NOT RESPOND 6

INTERNAL PROGRAMMER

Next: End

CH DOES NOT RESPOND 3

Next: End

CH DOES NOT RESPOND 8

INTERNAL PROGRAMMER

Next: End

PASSING TO RADS OR NOT MOTORING

VALVE - DIVERTER

Next: End

RESTRICTED OR BLOCKED

TUBE

Next: End

INCORRECT TEMPERATURE CONTROL DHW

PCB

Next: End

INSUFFICIENT CH OUTPUT

PCB

Next: End

OPEN TOO MUCH

BYPASS

Next: End

NOT OPENING TO CH

VALVE - DIVERTER

Next: End

RESTRICTED OR BLOCKED PRIMARY SIDE

HEAT EXCHANGER 18 PLATES

Next: End

RESTRICTED OR BLOCKED PRIMARY SIDE 2

HEAT EXCHANGER 18 PLATES

Next: End

POOR DHW 2

PCB

Next: End

NOT REGISTERING PRESSURE

SENSOR - PRESSURE

Next: End

RESTRICTED OR BLOCKED

ELBOW

Next: End

RESTRICTED OR BLOCKED

SENSOR - PRESSURE

Next: End

BLANK FOR SYSTEM PRESSURE FUTHER INVESTIGATION

Z REDIRECTION

Next: End

BLANK FOR FAULT CODES 1

Z REDIRECTION

Next: End

NO MAINS POWER

Next: End

FUSE FURTHER INVESTIGATION

Z REDIRECTION

Next: End

FUSE FURTHER INVESTIGATION 2

Z REDIRECTION

Next: End

SHORTING CAUSING BLANK DISPLAY

FAN C/W COMBUSTION CHAMBER COVER

Next: End

FAULTY

DISPLAY

Next: End

SHORTING

HARNESS - WIRING - HEAT ENGINE

Next: End

FLOW THERMISTOR FAULT CODE

PCB

Next: End

FLOW THERMISTOR SECTION

HARNESS - WIRING - HEAT ENGINE

Next: End

RETURN THERMISTOR FAULT CODE

PCB

Next: End

RETURN THERMISTOR SECTION

HARNESS - WIRING - HEAT ENGINE

Next: End

F70 FAULT CODE

PCB

Next: End

NOT RUNNING

PUMP MOTOR

Next: End

F75 FAULT CODE

PCB

Next: End

SPEED CONTROL SIGNAL

PUMP MOTOR

Next: End

RESTRICTED OR BLOCKED F75

ELBOW

Next: End

RESTRICTED OR BLOCKED F75

SENSOR - PRESSURE

Next: End

NOT REGISTERING PRESSURE F75

SENSOR - PRESSURE

Next: End

FAULT CODE F74 AND F74

SENSOR - PRESSURE

Next: End

FAULT CODE THERMISTOR ISSUES

HARNESS - WIRING - HEAT ENGINE

Next: End

FAULT CODE THERMISTOR ISSUES

PCB

Next: End

FAULT CODE THERMISTOR ISSUES 2

HARNESS - WIRING - HEAT ENGINE

Next: End

NOT RUNNING OVERHEAT

PUMP MOTOR

Next: End

OVERHEAT

HEAT EXCHANGER 18 PLATES

Next: End

FAULT CODE F89

PCB

Next: End

FAULT CODE F89 2

PUMP MOTOR

Next: End

FAULT CODE F89

PUMP MOTOR

Next: End

FAULT CODE GAS VALVE

PCB

Next: End

FAULT CODE GAS VALVE

HARNESS - WIRING - HEAT ENGINE

Next: End

F49 FAULT CODE 2

PCB

Next: End

F86 FAULT CODE

PCB

Next: End

F86 FAULT CODE 2

PCB

Next: End

CONNECTION FAULT CODE

DISPLAY

Next: End

F87 FAULT CODE

PCB

Next: End

FAULT CODE F62 AND F27

PCB

Next: End

FAULT CODE F29

PCB

Next: End

FAULT CODE F29

IGNITOR

Next: End

FAULT CODE F29

GAS CONTROL VALVE

Next: End

FAULT CODE F29

PIPE - FLUE

Next: End

FAULT CODE F29

DRAIN - CONDENSATE (SUMP)

Next: End

FAULT CODE F29

FLUE PIPE GASKETS

Next: End

LOW FAN PRESSURE FAULT CODE F29

FAN C/W COMBUSTION CHAMBER COVER

Next: End

FUSE INVESTIGATION

PUMP MOTOR

Next: End

PCB BLOWING FUSE

PCB FUSE BLOWN

Next: End

FUSE BLOWING

FAN C/W COMBUSTION CHAMBER COVER

Next: End

BLANK FOR OVERHEAT

Z REDIRECTION

Next: End

POOR DHW S53/54

PCB

Next: End

RESTRICTED OR BLOCKED PRIMARY SIDE S53/54

HEAT EXCHANGER 18 PLATES

Next: End

LOW GAS RATE

GAS CONTROL VALVE

Next: End

LOW MAXIMUM FAN PRESSURE

FAN C/W COMBUSTION CHAMBER COVER

Next: End

SHORTED CAUSING BLANK DISPLAY

HARNESS WIRING

Next: End

RESTRICTED OR PERFORATED

PIPE - FLUE

Next: End

RESTRICTED OR BLOCKED

DRAIN - CONDENSATE (SUMP)

Next: End

GASKETS IN POOR CONDITION

Next: !p1001

SELF CHECK COMPLETES BUT SPANNER SHOWN IN DISPLAY

CHARACTERISTIC TEST FROM SELF CHECK AND APPLIANCE SET UP

Next: p1025

DISPLAY ILLUMINATES BUT GOES OFF AFTER APPROXIMATELY 15 SECONDS

CHARACTERISTIC TEST FROM START UP DISPLAY

Next: p1043

DHW DEMAND RECOGNISED BUT FAN DOES NOT RUN

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS DHW

Next: p152

DHW DEMAND NOT RECOGNISED

CHARACTERISTIC TEST FROM OBSERVATION FAN RUNS DHW

Next: p170

FAN RUNS CONTINUOUSLY AT HIGH SPEED

CHARACTERISTIC TEST FROM SELF CHECK AND APPLIANCE SET UP

Next: p201

RADIATOR SYMBOL FLASHES IN DISPLAY

CHARACTERISTIC TEST FROM SELF CHECK AND APPLIANCE SET UP

Next: p210

PUMP RUNS FOR LONGER THAN 30 SECONDS

CHARACTERISTIC TEST FROM SELF CHECK AND APPLIANCE SET UP

Next: p221

BURNER DOES NOT IGNITE AND ESTABLISH

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p303

BURNER IGNITES BUT BAFFLES OR IS NOISY

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p238

FLUE PIPE RESTRICTED OR PERFORATED

Next: !p318

CONDENSATE SUMP RESTRICTED OR BLOCKED

Next: !p320

GASKETS IN POOR CONDITION

Next: !p322

FLUE PIPE RESTRICTED OR PERFORATED

Next: !p409

CONDENSATE SUMP RESTRICTED OR BLOCKED

Next: !p411

GASKETS IN POOR CONDITION

Next: !p413

FAULT CODE F32 SHOWN

CHARACTERISTIC TEST FROM OBSERVATION BURNER IGNITION AND ESTABLISH

Next: p431

24 VOLT EXTERNAL CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION EXTERNAL CONTROLS FITTED

Next: p444

EBUS CONTROLS FITTED

CHARACTERISTIC TEST FROM OBSERVATION EXTERNAL CONTROLS FITTED

Next: p446

TEMPERATURE RISE UNSATISFACTORY - RADS BEGIN TO HEAT WITH NO CH DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p464

TEMPERATURE RISE UNSATISFACTORY - RADS REMAIN COOL

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p466

DHW TOO HOT

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p468

DHW TEMPERATURE FLUCTUATES (RUNS HOT THEN COLD)

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p546

BOILER REACHES TEMP RADIATORS REMAIN COOL OR DO NOT HEAT

CHARACTERISTIC TEST FROM OPERATION CENTRAL HEATING

Next: p502

EXCESSIVE SYSTEM PRESSURE RISE

CHARACTERISTIC TEST FROM OPERATION CENTRAL HEATING

Next: p479

BOILER AND RADIATORS FAIL TO REACH SET TEMPERATURE

CHARACTERISTIC TEST FROM OPERATION CENTRAL HEATING

Next: p481

ZERO OR LOW PRESSURE FLASHING

CHARACTERISTIC TEST FROM START UP DISPLAY

Next: p577

ELBOW RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

Next: !p582

PRESSURE SENSOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

Next: !p584

FAULT CODE SHOWN

CHARACTERISTIC TEST FROM START UP DISPLAY

Next: p588

DISPLAY DOES NOT ILLUMINATE

CHARACTERISTIC TEST FROM START UP DISPLAY

Next: p593

ELBOW RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

Next: !p665

PRESSURE SENSOR RESTRICTED OR BLOCKED

CHARACTERISTIC TEST FROM INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

Next: !p667

FLUE PIPE RESTRICTED OR PERFORATED

Next: !p826

CONDENSATE SUMP RESTRICTED OR BLOCKED

Next: !p828

GASKETS IN POOR CONDITION

Next: !p830

BOILER CUTS OUT ON DHW AND THEN STOPS RECOGNISING DHW DEMAND

CHARACTERISTIC TEST FROM OPERATION DHW

Next: p884

FLUE PIPE RESTRICTED OR PERFORATED

Next: !p997

CONDENSATE SUMP RESTRICTED OR BLOCKED

Next: !p999

10/01/2023 14:28:43 2212_2_50_1 28/02/2023 13:51:55

09/02/2023 12:58:35

Next: End

VOLTAGE DC PUMP SPEED CONTROL SEND (DISCONNECTED)

DISCONNECT THE 3 WIRE SPEED CONTROL FROM THE PUMP ASSEMBLY AND MAKE SAFE

Next: p1031, !f1032

VOLTAGE FLOW SENSOR - SEND (FLOW SENSOR DISCONNECTED)

REMOVE THE CONNECTOR FROM THE FLOW SENSOR AND MAKE SAFE

Next: p1038, !f1039

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p1054, !f1055

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p1058, !f1059

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
ENSU

Next: !p1062, !f1063

RESISTANCE DIVERTER VALVE MOTOR AND HARNESS

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p1066, !f1067

VOLTAGE FLOW SENSOR DHW - RETURN

{GAINPCBACS}

Next: !p1070, !f1071

VOLTAGE GAS VALVE AT GAS VALVE

Next: !p1074, !f1075

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR TO THE GAS VALVE

Next: !p1078, !f1079

RESISTANCE PUMP AND HARNESS AC FUSE INVESTIGATION

REMOVE CONNECTOR X14 FROM THE PCB

Next: !p1082, !f1083

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: !p1086, !f1087

VOLTAGE DC PUMP SPEED CONTROL SEND (DISCONNECTED)

DISCONNECT THE 3 WIRE SPEED CONTROL FROM THE PUMP ASSEMBLY AND MAKE SAFE

Next: !p1090, !f1091

VOLTAGE AC FAN

Next: !p1094, !f1095

RESISTANCE FAN AND HARNESS AC FUSE INVESTIGATION

REMOVE CONNECTOR X12 FROM THE PCB

Next: !p1098, !f1099

FLOW RATE / PRESSURE COLD WATER SUPPLY

Next: p139, !f142

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR X12 FROM THE PCB
REMOVE THE 3 WIRE CONNECTOR FROM THE FAN

Next: !p161, !f162

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p165, !f166

RESISTANCE HARNESS FAN IV

REMOVE THE 4 WIRE HARNESS FROM THE FAN ASSEMBLY AND THE
MAIN HARNESS AT THE INLINE CONNECTOR

Next: !p163, !f164

VOLTAGE FLOW SENSOR - SEND

Next: p173, f1037

RESISTANCE HARNESS FAN IV

REMOVE THE 4 WIRE HARNESS FROM THE FAN ASSEMBLY AND THE
MAIN HARNESS AT THE INLINE CONNECTOR

Next: !p204, !f205

OBSERVATION EXTERNAL CONTROLS FITTED - SELF TEST

GAIN ACCESS TO PCB

Next: p213, f214

DISCONNECT EBUS CONTROLS - SELF TEST

REMOVE EBUS WIRING CONNECTIONS AND MAKE SAFE
REMOVE WIRE LINK BETWEEN THE 24 VOLT CONNECTIONS

Next: !p215, !f216

VOLTAGE RECTIFICATION AT PCB

{GAINPCBACS}

Next: !p308, f309

INSPECTION AIR INLET DUCT AND GASKET

REMOVE THE AIR INLET DUCT FROM THE FAN ASSEMBLY

Next: p310, !f311

INSPECTION FLUE PIPE AND SUMP / GASKETS

REMOVE THE FLUE PIPE FROM FRONT OF THE APPLIANCE

Next: p316, ?317, ?319, ?321

RESISTANCE HARNESS SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR AND CONNECTOR X21 FROM THE PCB

Next: !p348, !f349

VOLTAGE SPARK GENERATOR AT PCB

{GAINPCBACS}
REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR AND MAKE SAFE

Next: p384, f377

VOLTAGE FAN HALL SENSOR AT PCB

{GAINPCBACS}

Next: !p378, f379

RESISTANCE HARNESS FAN DC COMPLETE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN ASSEMBLY
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p380, f381

RESISTANCE HARNESS FAN IV

REMOVE THE 4 WIRE HARNESS FROM THE FAN ASSEMBLY AND THE
MAIN HARNESS AT THE INLINE CONNECTOR

Next: !p382, !f383

INSPECTION FLUE PIPE AND SUMP / GASKETS

REMOVE THE FLUE PIPE FROM FRONT OF THE APPLIANCE

Next: p407, ?408, ?410, ?412

VOLTAGE GAS VALVE AT GAS VALVE

Next: !p421, f422

RESISTANCE GAS VALVE AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p423, f424

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR TO THE GAS VALVE

Next: !p425, !f426

RESISTANCE HARNESS FAN DC COMPLETE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN ASSEMBLY
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p434, f435

RESISTANCE HARNESS FAN IV

REMOVE THE 4 WIRE HARNESS FROM THE FAN ASSEMBLY AND THE
MAIN HARNESS AT THE INLINE CONNECTOR

Next: !p436, !f437

OBSERVATION EXTERNAL CONTROLS FITTED

GAIN ACCESS TO THE PCB

Next: p442, ?443, ?445

OBSERVATION INTERNAL PROGRAMMER FITTED

Next: p451, !f452

OBSERVATION INTERNAL PROGRAMMER FITTED

Next: p457, !f458

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
ENSU

Next: p520, !f521

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS INDICATED BY THE RED ARROWS

Next: p542, !f543

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS INDICATED BY THE RED ARROWS

Next: p557, !f571

INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

PRIMARY WATER DRAINED AND DISCHARGED
REMOVE LOW WATER PRESSURE SWITCH FROM FLOW PIPE

Next: !p580, ?581, ?583

RESISTANCE FUSE (FUSED SPUR)

REMOVE FUSE FROM FUSED SPUR

Next: !p596, f597

FUSE FURTHER INVESTIGATION (FUSED SPUR)

THE INFORMATION PROV

Next: !p598, !f599

FUSE FURTHER INVESTIGATION (PCB FUSE)

THE INFORMATION PROV

Next: !p602, !f603

VOLTAGE DISPLAY AT MAIN PCB

{GAINPCBACS}

Next: p618, !f607

OBSERVATION DISCONNECT PRESSURE SENSOR

REMOVE CONNECTOR FROM PRESSURE SENSOR AND MAKE SAFE

Next: p610, !f611

RESISTANCE HARNESS FAN IV

REMOVE THE 4 WIRE HARNESS FROM THE FAN ASSEMBLY AND THE
MAIN HARNESS AT THE INLINE CONNECTOR

Next: !p622, !f623

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p628, f629

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p630, !f631

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p634, f635

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p636, !f637

OBSERVATION DSN NUMBER

Next: !p640, !f641

OBSERVATION PUMP RUNNING

Next: p649, f644

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p645, !f646

VOLTAGE DC PUMP SPEED CONTROL SEND

DISCONNECT THE 3 WIRE SPEED CONTROL FROM THE PUMP ASSEMBLY AND MAKE SAFE

Next: p658, !f659

INSPECTION SYSTEM PRESSURE SENSOR AND ELBOW

PRIMARY WATER DRAINED AND DISCHARGED
REMOVE LOW WATER PRESSURE SWITCH FROM FLOW PIPE

Next: p668, ?664, ?666

RESISTANCE HARNESS PRESSURE SENSOR

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE CONNECTOR FROM PRESSURE SENSOR

Next: p673, !f674

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p685, !f700

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: !p688, !f689

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p698, !f699

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p703, !f713

VOLTAGE PUMP AT PCB

{GAINPCBACS}

Next: p728, !f729

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS INDICATED BY THE RED ARROWS

Next: p733, !f734

RESISTANCE PUMP AC

REMOVE CONNECTOR X14 FROM THE PCB

Next: p749, f761

RESISTANCE PUMP HARNESS AC

REMOVE LEFT HAND CON

Next: !p767, !f766

RESISTANCE HARNESS PUMP SPEED CONTROL

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p763, !f764

RESISTANCE GAS VALVE AND HARNESS

{GAINPCBACS}
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p771, f770

RESISTANCE GAS VALVE

REMOVE ELECTRICAL CONNECTOR TO THE GAS VALVE

Next: !p772, !f773

OBSERVATION EBUS CONTROLS FITTED

Next: p776, !f777

OBSERVATION UNDERFLOOR HEATING FITTED

Next: p782, f783

INSPECTION LINK FITTED

Next: !p784, !f785

VOLTAGE DISPLAY AT MAIN PCB

{GAINPCBACS}

Next: p790, !f791

INSPECTION ELECTRODE IGNITION

REMOVE AIR INTAKE TUBE
REMOVE IGNITION ELECTRODE

Next: !p796, !f797

INSPECTION ELECTRODE IGNITION

REMOVE AIR INTAKE TUBE
REMOVE IGNITION ELECTRODE

Next: p801, !f804

INSPECTION CONDENSATE PIPE

Next: p809, !f837

INSPECTION AIR INLET DUCT AND GASKET

REMOVE THE AIR INLET DUCT FROM THE FAN ASSEMBLY

Next: p814, !f815

RESISTANCE HARNESS SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR AND CONNECTOR X21 FROM THE PCB

Next: !p820, !f821

INSPECTION FLUE PIPE AND SUMP / GASKETS

REMOVE THE FLUE PIPE FROM FRONT OF THE APPLIANCE

Next: p824, ?825, ?827, ?829

RESISTANCE PUMP AND HARNESS AC FUSE INVESTIGATION

REMOVE CONNECTOR X14 FROM THE PCB

Next: p852, f851

RESISTANCE PUMP HARNESS AC

REMOVE LEFT HAND CON

Next: !p853, !f854

RESISTANCE HARNESS FAN AC

REMOVE CONNECTOR X12 FROM THE PCB
REMOVE THE 3 WIRE CONNECTOR FROM THE FAN

Next: !p857, !f858

TEMPERATURE DIFFERENTIAL CH

ATTACH TEMPERATURE CLAMPS TO FLOW AND RETURN PIPES AS INDICATED BY THE RED ARROWS

Next: p895, !f896

INSPECTION AIR INLET DUCT AND GASKET POOR DHW

REMOVE THE AIR INLET DUCT FROM THE FAN ASSEMBLY

Next: p929, !f940

INSPECTION CONDENSATE PIPE

Next: p932, !f933

INSPECTION BURNER ASSEMBLY

REMOVE COMBINED FAN,

Next: p1004, !f1005

INSPECTION FLUEWAYS HEAT EXCHANGER

Next: !p1006, !f1007

TEMPERATURE TAP AND BOILER DISCREPANCY

Next: !p1011, !f1012

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p1020, !f1021

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p1022, !f1023

OBSERVATION HAS THE MAINTENANCE INTERVAL SURPASSED

Next: !p1026, !f1027

RESISTANCE HARNESS PUMP SPEED CONTROL

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p1033, !f1034

RESISTANCE HARNESS FLOW SENSOR

REMOVE ELECTRICAL CONNECTORS X2 FROM THE PCB AND
TO THE DHW FLOW SENSOR

Next: !p1040, !f1041

OBSERVATION ADJUSTMENT DSN DISPLAY OPERATES CORRECTLY

REMOVE CONNECTOR FROM RETURN THERMISTOR AND MAKE SAFE

Next: !p1044, !f1045

INSPECTION DHW ISOLATION VALVE

Next: p145, !f143

INSPECTION FILTER

MAINS WATER ISOLATED AND DRAINED
REMOVE THE COLD WATER ISOLATION VALVE

Next: !p141, !f144

INSPECTION FLOW SENSOR

MAINS WATER ISOLATED

Next: p140, !f149

VOLTAGE AC FAN

Next: p155, f158

VOLTAGE DC FAN DEMAND

{GAINPCBACS}
REMOVE 4 WIRE CONNECTOR FROM FAN ASSEMBLY AND MAKE SAFE

Next: p156, f159

RESISTANCE HARNESS FAN DC COMPLETE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN ASSEMBLY
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p157, f160

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p167, !f168

VOLTAGE FLOW SENSOR DHW - RETURN

{GAINPCBACS}

Next: p171, f172

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p177, !f178

RESISTANCE HARNESS FLOW SENSOR

REMOVE ELECTRICAL CONNECTORS X2 FROM THE PCB AND
TO THE DHW FLOW SENSOR

Next: !p1018, !f176

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p179, !f180

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p181, !f438

RESISTANCE HARNESS FAN DC COMPLETE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN ASSEMBLY
REMOVE CONNECTOR X20 FROM THE PCB

Next: p202, f203

VOLTAGE DC FAN PERMANENT

Next: p206, !f207

VOLTAGE DC FAN RETURN 1

Next: p231, !f209

OBSERVATION FROST PROTECTION STATUS CODE

Next: p1019, f212

DISCONNECT EXTERNAL CONTROLS

REMOVE ALL EXTERNAL

Next: !p217, !f860

OBSERVATION STATUS CODE THERMISTOR TEMPERATURE SPREAD

Next: p222, f1030

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p224, !f225

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p226, !f227

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p228, !f439

VOLTAGE DC FAN RETURN 2

Next: !p232, !f233

INSPECTION CONDENSATE PIPE

Next: p284, !f240

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p285, !f286

INSPECTION AIR INLET DUCT AND GASKET

REMOVE THE AIR INLET DUCT FROM THE FAN ASSEMBLY

Next: p994, !f288

INSPECTION CONDENSATE PIPE

Next: p304, !f428

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p305, !f427

OBSERVATION BURNER HEARD TO IGNITE

Next: p387, f307

PRESSURE FAN

NO DEMANDS
ATTACH TUBE FROM + VE CONNECTION ON FGA TO THE UPPER GAS VALVE TEST POINT

Next: p353, f406

INSPECTION ELECTRODE IGNITION

REMOVE AIR INTAKE TUBE
REMOVE IGNITION ELECTRODE

Next: p332, !f331

PRESSURE FAN

NO DEMANDS
ATTACH TUBE FROM + VE CONNECTION ON FGA TO THE UPPER GAS VALVE TEST POINT

Next: !p313, f315

INSPECTION FLUE ASSEMBLY

Next: p323, !f324

INSPECTION BURNER ASSEMBLY

REMOVE COMBINED FAN,

Next: p350, !f326

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE IGNITION ELECTRODE LEAD FROM
TERMINAL 3 OF THE SPARK GENERATOR

Next: p312, f347

INSPECTION FLUEWAYS HEAT EXCHANGER

Next: !p351, !f352

PRESSURE FAN - EQUALISATION

NO DEMANDS
ATTACH TUBE FROM + VE CONNECTION ON FGA TO THE UPPER GAS VALVE TEST POINT

Next: !p405, f420

OBSERVATION SPARKING

DISCONNECT THE IGNIT

Next: p306, f369

INSPECTION ELECTRODE IGNITION

REMOVE AIR INTAKE TUBE
REMOVE IGNITION ELECTRODE

Next: p354, !f362

RESISTANCE HARNESS SPARK GENERATOR

REMOVE ELECTRICAL CONNECTOR TO SPARK GENERATOR AND CONNECTOR X21 FROM THE PCB

Next: !p385, !f386

INSPECTION AIR INLET DUCT AND GASKET

REMOVE THE AIR INLET DUCT FROM THE FAN ASSEMBLY

Next: p357, !f404

INSPECTION FLUE ASSEMBLY

Next: p414, !f415

INSPECTION BURNER ASSEMBLY

REMOVE COMBINED FAN,

Next: p416, !f417

INSPECTION FLUEWAYS HEAT EXCHANGER

Next: !p418, !f419

VOLTAGE FAN HALL SENSOR AT PCB

{GAINPCBACS}

Next: !p432, f433

BYPASS EXTERNAL CONTROLS - 240V

DISCONNECT 240V EXTE

Next: !p455, f456

BYPASS EXTERNAL CONTROLS - 24V

DISCONNECT 24V EXTER

Next: !p449, f450

DISCONNECT EBUS CONTROLS - CH DEMAND

DISCONNECT EBUS WIRING CONNECTIONS AND MAKE SAFE

Next: !p447, !f448

DISCONNECT INTERNAL PROGRAMMER

REMOVE X31 (PROGRAMMER) CONNECTOR FROM THE PCB AND MAKE SAFE

Next: !p453, !f454

DISCONNECT INTERNAL PROGRAMMER

REMOVE X31 (PROGRAMMER) CONNECTOR FROM THE PCB AND MAKE SAFE

Next: !p459, !f460

VOLTAGE DIVERTER VALVE AT PCB

{GAINPCBACS}
ENSU

Next: p472, !f471

PRESSURE GAS VALVE INLET - DHW

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p525, !f535

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p490, !f495

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR X2 FROM THE PCB AND
ELECTRICAL CONNECTOR TO THE DIVERTER VALVE

Next: !p473, !f474

PRESSURE EXPANSION VESSEL

PRIMARY WATER DRAINED AND DISCHARGED

Next: !p487, !f489

OBSERVATION MAXIMUM HEATING POWER

NO DEMANDS

Next: p497, !f496

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p491, !f493

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p492, !f494

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p498, !f500

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: !p499, !f501

INSPECTION ISOLATION VALVES FLOW AND RETURN

Next: p509, !f524

PUMP LIMPET TEST

Next: p504, !f518

TEMPERATURE INTEGRAL BYPASS

Next: p505, f519

OBSERVATION CLOSE INTEGRAL BYPASS

CLOSE THE INTEGRAL BYPASS BY TURNING
THE ADJUSTMENT SCREW CLOCKWISE

Next: !p507, !f508

INSPECTION EXTERNAL BYPASS

Next: p503, !f517

RESISTANCE HARNESS DIVERTER VALVE

REMOVE CONNECTOR X2 FROM THE PCB AND
ELECTRICAL CONNECTOR TO THE DIVERTER VALVE

Next: !p522, !f523

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p526, !f536

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p527, !f537

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: p963, !f538

PUMP LIMPET TEST

Next: p529, !f567

TEMPERATURE DIFFERENTIAL DHW

TURN HOT WATER TAP O

Next: p530, f541

OBSERVATION DSN NUMBER

Next: p915, !f568

INSPECTION HEATING FILTER

PRIMARY HEATING WATE

Next: !p544, !f545

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p547, !f548

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p549, !f550

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: p941, !f552

PUMP LIMPET TEST

Next: p553, !f563

TEMPERATURE DIFFERENTIAL DHW

TURN HOT WATER TAP O

Next: !p570, f556

INSPECTION HEATING FILTER

PRIMARY HEATING WATE

Next: !p559, !f565

OBSERVATION SYSTEM PRESSURE INCREASE

Next: p578, f579

SYSTEM PRESSURE FURTHER INVESTIGATION

THE SYSTEM PRESSURE

Next: !p585, !f586

FAULT CODES

Next: !p589, !f590

VOLTAGE MAINS POWER INPUT AT PCB

{GAINPCBACS}

Next: p594, f595

RESISTANCE FUSE PCB

REMOVE FUSE FROM PCB

Next: p600, f601

OBSERVATION DISCONNECT X2 AND X20

REMOVE CONNECTOR X2 FROM THE PCB
REMOVE CONNECTOR X20 FROM THE PCB

Next: p604, f605

OBSERVATION REFIT X2

REFIT CONNECTOR X2 TO THE PCB

Next: p608, f609

RESISTANCE HARNESS FAN DC COMPLETE

REMOVE THE 4 WIRE CONNECTOR FROM THE FAN ASSEMBLY
REMOVE CONNECTOR X20 FROM THE PCB

Next: !p616, f621

OBSERVATION DISCONNECT FLOW SENSOR

REMOVE CONNECTOR FROM FLOW SENSOR AND MAKE SAFE

Next: p612, !f613

OBSERVATION DISCONNECT PUMP SPEED CONTROL

REMOVE SPEED CONTROL CONNECTOR FROM PUMP AND MAKE SAFE

Next: p991, !f615

RESISTANCE HARNESS DISPLAY PCB

REMOVE CONNECTOR X51 FROM THE PCB
REMOVE CONNECTOR FROM THE DISPLAY PCB

Next: !p619, !f620

RESISTANCE PUMP HARNESS AC

REMOVE LEFT HAND CON

Next: !p647, !f648

OBSERVATION AIR BOILER AND SYSTEM

Next: p651, !f650

PUMP LIMPET TEST

Next: p652, !f653

VOLTAGE DC PRESSURE SENSOR UPLIFT

{GAINPCBACS}

Next: p654, f662

VOLTAGE DC PUMP SPEED CONTROL RETURN

Next: !p656, f657

RESISTANCE HARNESS PUMP SPEED CONTROL

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p660, !f661

INSPECTION HEATING FILTER

PRIMARY HEATING WATE

Next: !p669, !f670

VOLTAGE DC TO PRESSURE SENSOR

REMOVE CONNECTOR FRO

Next: !p675, !f676

RESISTANCE THERMISTOR FLOW AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: p695, f687

RESISTANCE THERMISTOR RETURN AND HARNESS

REMOVE CONNECTOR X20 FROM THE PCB

Next: !p696, f697

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p704, !f725

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: p707, !f726

OBSERVATION PUMP RUNNING

Next: p706, f727

PUMP LIMPET TEST

Next: p710, !f718

OBSERVATION AIR BOILER AND SYSTEM

Next: p705, !f716

TEMPERATURE DIFFERENTIAL DHW

TURN HOT WATER TAP O

Next: p711, f732

OBSERVATION RUN BOILER TO TEMPERATURE

BOILER CH THERMOSTAT

Next: p861, !f720

RESISTANCE PUMP HARNESS AC

REMOVE LEFT HAND CON

Next: !p730, !f731

INSPECTION HEATING FILTER

PRIMARY HEATING WATE

Next: !p735, !f736

RESISTANCE PUMP DC

REMOVE CONNECTOR X2 FROM THE PCB

Next: p756, f762

RESISTANCE PUMP HARNESS AC

REMOVE LEFT HAND CON

Next: p757, !f758

RESISTANCE HARNESS PUMP SPEED CONTROL

REMOVE CONNECTOR X2 FROM THE PCB

Next: !p759, !f760

OBSERVATION DISCONNECT EBUS CONTROLS

REMOVE THE EBUS WIRING AND MAKE SAFE

Next: !p778, !f779

OBSERVATION LINK UNDERFLOOR HEATING CONTROL

REMOVE WIRES FROM TO

Next: !p786, !f787

RESISTANCE HARNESS DISPLAY PCB

REMOVE CONNECTOR X51 FROM THE PCB
REMOVE CONNECTOR FROM THE DISPLAY PCB

Next: !p792, !f798

PRESSURE STANDING RETURN

ATTACH U GAUGE TO INLET PRESSURE TEST POINT
ENSURE NO OTHER GAS APPLIANCES ARE IN OPERATION

Next: p802, !f805

TIGHTNESS TEST INSTALLATION

Next: !p803, !f806

PRESSURE GAS VALVE INLET

ATTACH PRESSURE GAUGE TO GAS VALVE PRESSURE INLET TEST POINT

Next: p811, !f838

VOLTAGE RECTIFICATION AT PCB FAULT CODE

{GAINPCBACS}

Next: !p812, f813

INSPECTION ELECTRODE IGNITION

REMOVE AIR INTAKE TUBE
REMOVE IGNITION ELECTRODE

Next: p816, !f817

RESISTANCE SPARK GENERATOR AND HARNESS

REMOVE IGNITION ELECTRODE LEAD FROM
TERMINAL 3 OF THE SPARK GENERATOR

Next: p818, f819

PRESSURE FAN

NO DEMANDS
ATTACH TUBE FROM + VE CONNECTION ON FGA TO THE UPPER GAS VALVE TEST POINT

Next: !p822, f823

INSPECTION FLUE ASSEMBLY

Next: p831, !f832

INSPECTION BURNER ASSEMBLY

REMOVE COMBINED FAN,

Next: p833, !f834

INSPECTION FLUEWAYS HEAT EXCHANGER

Next: !p835, !f836

RESISTANCE FAN AND HARNESS AC FUSE INVESTIGATION

REMOVE CONNECTOR X12 FROM THE PCB

Next: !p855, f856

OPERATION PUMP OVERRUN FOR OVERHEAT

Next: !p866, !f863

OBSERVATION THERMISTORS CORRECTLY FITTED

Next: p885, !f886

RESISTANCE THERMISTOR FLOW

REMOVE CONNECTOR FROM FLOW THERMISTOR

Next: p887, !f888

RESISTANCE THERMISTOR RETURN

REMOVE CONNECTOR FROM RETURN THERMISTOR

Next: p952, !f890

PUMP LIMPET TEST

Next: p891, !f892

TEMPERATURE DIFFERENTIAL DHW

TURN HOT WATER TAP O

Next: !p893, f894

INSPECTION HEATING FILTER

PRIMARY HEATING WATE

Next: !p897, !f898

GAS RATE

Next: p1010, f928

PRESSURE FAN MAXIMUM

REMOVE THE 4 WIRE CO

Next: !p930, f931

INSPECTION FLUE ASSEMBLY

Next: p934, !f935

INSPECTION BURNER ASSEMBLY

REMOVE COMBINED FAN,

Next: p936, !f937

INSPECTION FLUEWAYS HEAT EXCHANGER

Next: !p938, !f939

OBSERVATION AIR BOILER AND SYSTEM

Next: p551, !f951

OBSERVATION AIR BOILER AND SYSTEM

Next: p889, !f962

OBSERVATION AIR BOILER AND SYSTEM

Next: p528, !f989

OBSERVATION DISCONNECT DIVERTER VALVE

REMOVE THE CONNECTOR FROM THE DIVERTER VALVE AND MAKE SAFE

Next: !p992, !f993

INSPECTION FLUE PIPE AND SUMP / GASKETS

REMOVE THE FLUE PIPE FROM FRONT OF THE APPLIANCE

Next: p995, ?996, ?998, ?1000

INSPECTION FLUE ASSEMBLY

Next: p1002, !f1003

System Information

  • Total Tests: 638
  • Sequence Logic: Decoded from encrypted .seq file
  • Navigation: Dynamic based on pass/fail results
  • Source: 4731307 GW SWIFTFLOW 100 SIT Control